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TUZCH02 Mathematical Modeling and Optimization of Beam Dynamics in Accelerators rfq, focusing, quadrupole, electromagnetic-fields 68
 
  • D.A. Ovsyannikov
    St. Petersburg State University, St. Petersburg, Russia
  
  In this paper we treat the problem of beam dynamics optimization as a control theory problems. We consider different mathematical model of optimization. The approach to solving optimization problem for charged particle dynamics in accelerators includes: construction of mathematical model of controlled dynamical process; choice of control functions or parameters of optimization; construction of quality functionals, which allow efficient evaluation of various characteristics of examined controlled motion; analytical representation of the functional variations, which allow to construct various methods of optimization for quality functionals; construction of methods and algorithms of optimization. Problem of statement is considered on the pattern of RFQ channel.  
slides icon Slides TUZCH02 [1.601 MB]  
 
WEXOR02 New Developments and a Review of the Accelerator Facilities at iThemba LABS proton, cyclotron, ion, diagnostics 98
 
  • J.L. Conradie, R.A. Bark, A.H. Botha, J.C. Cornell, M.A. Crombie, J.G. De Villiers, J.L.G. Delsink, H. Du Plessis, J.S. Du Toit, W. Duckitt, D.T. Fourie, M.E. Hogan, I.H. Kohler, R.H. McAlister, H.W. Mostert, J.V. Pilcher, P.F. Rohwer, M. Sakildien, J.P. Slabbert, N. Stodart, R.W. Thomae, M.J. Van Niekerk, P.A. van Schalkwyk
    iThemba LABS, Somerset West, South Africa
  • J. Dietrich
    DELTA, Dortmund, Germany
  • M. Poggi
    INFN/LNL, Legnaro (PD), Italy
  
  iThemba LABS is a multi-disciplinary research facility that provides accelerator-based facilities for physical, biomedical and material sciences, treatment of cancer patients with neutrons and protons and the production of radioisotopes and radiopharmaceuticals. The successful utilization of beam diagnostic equipment is critical and essential for the effective running of such a facility and will be discussed in more detail. The current status of the facility and future projects, which entail a radioactive-ion beam project as well as a dedicated facility for proton therapy, will also be discussed.  
slides icon Slides WEXOR02 [6.188 MB]  
 
WEBOR01 The C-80 Cyclotron System. Technical Characteristics, Current Status, Progress and Prospects. cyclotron, proton, diagnostics, power-supply 106
 
  • Yu.N. Gavrish, P.V. Bogdanov, A.V. Galchuck, S.V. Grigorenko, V.I. Grigoriev, L.E. Korolev, A.N. Kuzhlev, Yu.D. Menshov, V.G. Mudrolyubov, V.I. Ponomarenko, Yu.I. Stogov, A.P. Strokach, S.S. Tsygankov, I.N. Vasilchenko
    NIIEFA, St. Petersburg, Russia
  • S.A. Artamonov, E.M. Ivanov, G.F. Mikheev, G.A. Riabov, V.M. Samsonov
    PNPI, Gatchina, Leningrad District, Russia
  
  A C-80 cyclotron system is intended to produce proton beams with an energy ranging from 40 up to 80 MeV and current up to 200 mkA. The beams with these parameters will be used for commercial production of a wide spectrum of isotopes for medicine, proton radiation therapy of eye diseases and superficial oncologic diseases as well as for fundamental and applied researches. Manufacturing and installation of the cyclotron equipment and first section of the system for the beam transport to remote targets have been finished. Physical start-up of the cyclotron has been realized. In future, the C-80 cyclotron is supposed to be used as an injector of the C-230 synchrotron, which serves for additional acceleration of the extracted proton beam to energies of the order of 230 MeV. This will allow the Bragg's peak-based treatment procedures to be applied in the proton therapy of oncologic patients.  
 
THXCH02 The Development of Synchrotron Radiation Source of NRC "Kurchatov Institute" electron, wiggler, storage-ring, synchrotron 126
 
  • V. Korchuganov, A. Belkov, Y.A. Fomin, E.V. Kaportsev, G.A. Kovachev, M.V. Kovalchuk, Y.V. Krylov, K. Kuznetsov, V.V. Kvardakov, V.V. Leonov, V.I. Moiseev, V.P. Moryakov, K. Moseev, N.I. Moseiko, D.G. Odintsov, S.G. Pesterev, Yu.F. Tarasov, S.I. Tomin, V. Ushkov, A.G. Valentinov, A. Vernov, Y.L. Yupinov, A.V. Zabelin
    NRC, Moscow, Russia
  
  Russia's first dedicated SR source based on electron storage ring Siberia-2 entered service in late 1999, Kurchatov Institute, Moscow. The report focuses on the consumer parameters of an electron beam and the further development of actual SR source, SR beam lines and experimental stations in 2012.  
slides icon Slides THXCH02 [5.459 MB]  
 
THAOR02 Production of Superconducting Magnets and Cryogenic Systems at IHEP cryogenics, dipole, quadrupole, kaon 146
 
  • S. Kozub, A.I. Ageev, A. Bakay, I. Bogdanov, E. Kashtanov, A.P. Orlov, V.A. Pokrovsky, P.A. Shcherbakov, L.S. Shirshov, I. Slabodchikov, M.N. Stolyarov, V. Sytnik, L. Tkachenko, S. Zinchenko
    IHEP, Moscow Region, Russia
  
  Largest in Russia cryogenic system of 280 W refrigeration capacity at 1.8 K temperature for cooling with superfluid helium of superconducting RF separator for the OKA experimental complex to produce a separated Kaon beam from U-70 proton accelerator was developed and commissioned at Institute for High Energy Physics (IHEP). Experience of the cryogenic system operation and direction of its modernization are discussed. Results of the development of fast-cycling superconducting magnets for the FAIR project (European Research Centre of Ions and Antiprotons, Germany) are presented.  
slides icon Slides THAOR02 [1.471 MB]  
 
THBCH01 High Precision Power Supply for Accelerator Magnets power-supply, pick-up, shielding, cyclotron 158
 
  • A.S. Banerjee
    DAE/VECC, Calcutta, India
  
  High precision power supplies are used to power various accelerator magnets to generate stable magnetic field required for various dynamic functions of the charged particles in an Accelerator system. High current stability of the order of 5ppm to 100ppm depending on the various functional applications of the accelerator magnet is the main feature of these power supplies. The paper describes the various technical aspects and considerations depicting ripple reduction techniques, regulating loops, high precision temperature controller, R.F. pick-up attenuation, power dissipation control, handling of the input supply line power disturbances etc., which are important for achieving high stability of the power supply.  
slides icon Slides THBCH01 [1.036 MB]  
 
THBCH02 Beam Extraction System for Industrial Electron Accelerator ILU-14 electron, extraction, vacuum, radiation 161
 
  • V.V. Bezuglov, A.A. Bryazgin, B.L. Faktorovich, E.N. Kokin, V.M. Radchenko, E.A. Shtarklev, A. YU. Vlasov
    BINP SB RAS, Novosibirsk, Russia
  
  This paper describes beam extraction system for pulse linear electron accelerator ILU-14 with energy range 7.5-10 MeV and beam power up to 100 kW. The main aim of this work was to achieve the uniform dose field in radiation zone. Admissible dose nonuniformity is of no more than ± 5% along the scanning length up to 1 m (if necessary, the scanning length may be reduced). Geometrical and electron-optical characteristics of all the beam channel elements were optimized after computer simulation of electron trajectories. To achieve the required nonuniformity of dose field additional electromagnets were installed. These magnets realize beam focusing and centering of the beam endwise of the channel, as well as correction of the scanning field. Control system of magnets power supply allows the online correction of electron beam.  
slides icon Slides THBCH02 [0.403 MB]  
 
FRXOR02 Beam Diagnostic Instrumentation for the NSLS-II Booster booster, diagnostics, vacuum, radiation 186
 
  • V.V. Smaluk
    BNL, Upton, Long Island, New York, USA
  
  For the NSLS-II synchrotron light source, a Booster synchrotron has been designed and produced by Budker Institute of Nuclear Physics. The Booster accelerates an electron beam from 200 MeV up to 3 GeV in both single-bunch and multi-bunch modes with repetition rate of 1 Hz. Accurate measurements of beam parameters are required during every work cycle to provide feed-forward tuning of the Booster. A set of beam diagnostic instruments has been developed for the Booster commissioning and operation. Six fluorescent screens are used for the first-turn beam observation. Electrostatic BPMs with signal processing electronics developed by BNL provide measurements of closed orbit and lattice functions as well as single-pass beam measurements for commissioning. A DC current transformer is used to measure average beam current and lifetime; the filling pattern is monitored by a fast current transformer. Two light-output ports are set up for observation of the beam image. Tune measurement system provides frequent measurements of betatron tunes during the energy ramp. Design and performance of the Booster beam instrumentation are presented; the commissioning plan is also discussed.  
slides icon Slides FRXOR02 [5.121 MB]  
 
FRACH03 The CC1-3 Cyclotron System cyclotron, vacuum, ion, power-supply 191
 
  • V.G. Mudrolyubov, A.V. Galchuck, Yu.N. Gavrish, S.V. Grigorenko, V.I. Grigoriev, L.E. Korolev, M.T. Kozienko, A.N. Kuzhlev, V.I. Ponomarenko, V.D. Shiltsev, Yu.I. Stogov, A.P. Strokach, S.S. Tsygankov, I.N. Vasilchenko
    NIIEFA, St. Petersburg, Russia
  • P. Beličev, A. Dobrosavljević, N. Nešković, V. Vujović
    VINCA, Belgrade, Serbia
  
  A СС1-3 cyclotron system has been designed to be installed in the Vinca Institute of Nuclear Sciences, Belgrade, Serbia. This system will be operated in the laboratory of nuclear-physical methods of the elemental analysis. The system includes a compact cyclotron and a system for beam shaping with specified energy characteristics. The cyclotron ensures the acceleration of negative hydrogen ions up to energy in the range from 1 to 3 MeV and a beam of protons is extracted by stripping on a thin carbon foil. The beam-shaping system ensures the beam of protons with a spectrum width not more than 0.1%. The main unit of the beam-shaping system is a magnetic analyzer with a bending angle of 270 deg. To date, the equipment of the cyclotron system has been manufactured and tests have been carried out on test facilities in the D.V. Efremov Institute. Installation will be performed in 2012.  
slides icon Slides FRACH03 [0.684 MB]  
 
FRAOR02 Method of State and Alignment Monitoring for Crystal Deflectors of Relativistic Ions proton, radiation, simulation, photon 200
 
  • A.S. Gogolev, S.R. Uglov
    TPU, Tomsk, Russia
  • A.M. Taratin
    JINR, Dubna, Moscow Region, Russia
  
  Funding: We acknowledge the partial support through the project GK No. 11.519.11.2030
Systems of relativistic particle beam steering based on the use of channeling effect are widely applied in leading research centers of Russia and foreign countries. An operative control is required in the case of using crystal deflectors for the accelerator beam collimation. The control should allow concluding about the state and alignment of the crystal collimator relative to the beam halo. The method of state and alignment monitoring for the crystal deflectors of relativistic ions using coherent X-rays generated by particles in crystals is suggested in this report. 		 
 
FRBCH05 Application of Small-Sized Vacuum Accelerating Tubes for Neutron Control of Increasing Debit of Oil Wells by Acoustic Influence of the Formation neutron, damping, monitoring, background 233
 
  • D.R. Khasaya, B.Y. Bogdanovich, A.V. Ilyinsky, A. Nesterovich, A.E. Shikanov, E.A. Shikanov
    MEPhI, Moscow, Russia
  
  The report presents experimental studies results of the possibility using the technique of neutron "labeled" reagent (NaCl) for monitoring of the acoustic influence (AI) results in the oil reservoir to increase oil production debits. These obtained data allow us to estimate the effectiveness of acoustic influence the method on managed oil reservoirs in conjunction with the equipment which pulsed neutron-neutron ray logging based on vacuum accelerator tubes that implements the method of neutron "labeled" reagent. The proposed instrumental set ensures reliable process control stimulation of oil from the reservoir and the allocation of layers to abnormal filtration and capacitive properties and their subsequent development.  
 
MOPPA023 Investigation of INR DTL RF System Operation at 100 Hz Repetition Rate DTL, cathode, cavity, linac 296
 
  • V.L. Serov, A.N. Drugakov, A. Feschenko, A.I. Kvasha, A.N. Naboka
    RAS/INR, Moscow, Russia
  
  INR Linac has been operating with 50 Hz beam repetition rate so far. Increasing the repetition rate up to 100 Hz is of importance as it results in doubling of the beam intensity. To solve the task several accelerator systems must be modernized but the most critical one is the DTL rf system (up to 100 MeV). The problems related to the DTL rf system repetition rate increasing are described. One of them is a 50 Hz modulation of a 100 Hz rf pulse sequence. Though the instabilities of accelerating field due to the modulation are reduced by the feedback systems, nevertheless exploration of the effect and its minimizing is of importance. The analysis of the effect is given and the results of experimental studies are presented.  
 
TUPPB011 Analytical Approach for Beam Matching linac, ion, simulation, emittance 334
 
  • V.S. Dyubkov, S.M. Polozov
    MEPhI, Moscow, Russia
  
  Charge particle beams transportation with small cross-sections and low energies is an actual problem for a gantry. That beams are used actively for isotope therapy. Beam emittance is its quality factor, and it should be matched with a facility channel acceptance. The method for beam dynamics analysis in lattice is developed in terms of non-coherent particle oscillation study. Nonlinear beam dynamics is investigated by using this method. It is shown that this technique allows one to realize effective beam emittance control. Analytical results obtained are verified by means of numerical simulation.  
 
TUPPB020 Mathematical Model of Beam Dynamics Optimization in Traveling Wave rfq, acceleration, injection, resonance 355
 
  • A.D. Ovsyannikov, A.Yu. Shirokolobov
    St. Petersburg State University, St. Petersburg, Russia
  
  In works by B.I. Bondarev, A.P. Durkin, A.D. Ovsyannikov mathematical model of optimization of of charged particles dynamics in RFQ accelerators was proposed. In this paper a new mathematical model of optimization of particle dynamics in traveling wave is considered. Joint optimization model of program and disturbed motions is investigated.  
 
TUPPB021 Calculation of Tolerance and Stastistical Test focusing, quadrupole, resonance 358
 
  • Y.V. Yelaev
    St. Petersburg State University, St. Petersburg, Russia
  
  In the paper mathematical methods of tolerance determination of different parameters of accelerating and focusing structures are considered. The determination of tolerances is based on the analytical representation of variation of functional characterizing the beam dynamics. Method of statistical analysis of calculated tolerance values is represented. The purpose of the work is to determine the maximum possible deviations of the real (actual) parameters from nominal, when the qualitative structure function satisfies to the required modes.  
 
TUPPB022 Mathematical Model of Beam Dynamic Optimization focusing, DTL, emittance, linac 361
 
  • V.V. Altsybeyev
    St. Petersburg State University, St. Petersburg, Russia
  
  We treat here the process of simulation of charged particle dynamics using so called hybrid system. Hybrid system is a system with continuous and discrete parts, described by differential and difference equations, respectively. In this case new mathematical model of beam dynamics optimization is suggested. The main parameters of optimization are: coefficient of particle capture in the acceleration mode, phase and energy spectra of particles at the exit of the accelerator, the transverse beam characteristics, etc. Optimization was carried out for the drift tubes accelerator.  
 
TUPPB024 Development of the Object-oriented Program in C ++ for Simulation of Beam Dynamics in Accelerator Injection Systems injection, simulation, emittance, focusing 364
 
  • S.A. Kozynchenko
    St. Petersburg State University, St. Petersburg, Russia
  
  At present, more and more attention is paid to the design and creation of accelerator systems for precision beams. Their injection systems in many aspects determine the output characteristics of the beam, so the questions of the design of such systems are of great importance. In such cases both simulation and optimization of beam dynamics in electromagnetic fields close to real may be necessary. In this paper the program for simulation and optimization of beam dynamics in injection systems is considered, which at the same time allows the choice of parameters of the accelerating-focusing system. This permits designing the injection system during optimization process, taking into account the required output characteristics of the beam. The given program is based on Win 32 API dialog boxes and is developed in standard C++, using parallel programming tools based on the MPI-1.  
 
TUPPB025 Investigation of Program and Perturbed Motions of Particles in Linear Accelerator electron, rfq, resonance, simulation 367
 
  • I.D. Rubtsova, E.N. Suddenko
    St. Petersburg State University, St. Petersburg, Russia
  
  Beam control model for program and perturbed motions with interaction account is realized. Quality functional gradient is obtained.  
 
TUPPB026 Comparison of Matrix Formalism and Step-by-step Integration for the Long-term Dynamics Simulation in Electrostatic Fields simulation, lattice, electromagnetic-fields, storage-ring 370
 
  • A.N. Ivanov
    St. Petersburg State University, St. Petersburg, Russia
  
  An approach based on matrix formalism for solving differential equations is described. Effective in sense of performance matrix formalism can be tested with less efficient, but accurate traditional algorithm of numerical simulation based on the Runge-Kutta scheme. In both cases the symplectic version of the algorithms are used. The results coincide to analytical calculations, but some disagreements have been identified. The approach implementation is demonstrated in the problem of long-term spin dynamics in electrostatic fields.  
 
TUPPB027 Some Problems of Beam Slow Extraction extraction, feedback, resonance, beam-transport 373
 
  • S.N. Andrianov
    St. Petersburg State University, St. Petersburg, Russia
  
  Funding: The work is supported by Federal Targeted Program "Scientific and Scientific-Pedagogical Personnel of the Innovative Russia in 2009-2013" (Governmental Contract no. p 793)
In this paper we discuss some problems of modeling of beam slow extraction systems. It is known that similar type of beam extraction is used for different kind of circular accelerators. Among the most important requirements for such systems is necessary to mention the time uniformity of the extracted beam. There exist the following two key causes. The first of them is induced by time discontinuity of the corresponding steering electrical currents, and the second cause is induced by an beam inertia which usually connected with beam feedback mechanism, which is usually used for temporal smoothing of the corresponding magnetic (and electrical) fields. In the base of our approach we put the matrix formalism for Lie algebraic tools, which allows us to analyze different kind of the time discontinuity cause. 		 
 
TUPPB044 The Knife-Edged Field Emitter Mathematical Modeling cathode, vacuum, space-charge, background 412
 
  • E.M. Vinogradova, M.G. Fomenko
    Saint-Petersburg State University, Saint-Petersburg, Russia
  
  Numerous nano-scale electronic devices are based on the field emitters such as carbon nanotubes. The field emitters are extensively applied in the various domains of an instrument engineering. In the present work the problem of a field emission cathode as the knife-edged field emitter mathematical modeling is solved. The supposed shapes of the emission diode system with the field emitter are the lune's type (as a cathode) and the infinitely thin spherical segment (as an anode). The effect of the space charge is neglected. The boundary - value problem for the Laplace equation in the toroidal coordinate system is presented. To solve the electrostatic problem the variable separation method is used. The potential distribution is represented as the series with respect to Legendre functions. The boundary conditions and the normal derivative continuity conditions lead to the linear algebraic equations system relative to the series coefficients. In this way the distribution of the potentials for the whole region of the considered electro-optical systems was obtained.  
 
TUPPB047 The Triode-type System on the Basis of the Field Emitter Modeling cathode, electron, vacuum, ion-source 418
 
  • D.S. Televnyi
    St. Petersburg State University, St. Petersburg, Russia
  • E.M. Vinogradova
    Saint-Petersburg State University, Saint-Petersburg, Russia
  
  The mathematical model of a cylindrical triode-type system on the basis of the field emitter is under consideration. The internal area of the system is filled of two different dielectrics. Effect of space charge is not considered. The field emitter is modeled by a charged filament of finite length, which located on the system's axis. The modulator has a form of a circular diaphragm. The Poisson equation with the given values of potentials at the electrodes is solved. The variable separation method is used to determine distribution of electrostatic potential. An unknown function of the charge density is approximated by a piecewise constant linear function. The problem of finding unknown coefficients in the potential eigenfunction expansion is reduced to the linear algebraic equations system. Numerical calculations emitter's forms are represented.  
 
TUPPB050 The System of Power Supplies, Control and Modulation of Electron Gun for Free Electron Laser electron, cathode, FEL, free-electron-laser 427
 
  • V.K. Ovchar, V.R. Kozak, E.A. Kuper, V.R. Mamkin, V.V. Repkov, S.S. Serednyakov, S.V. Tararyshkin, D.A. Zverev
    BINP SB RAS, Novosibirsk, Russia
  
  The system of power supplies, control and modulation based on triode cathode-grid unit was designed for producing of pulsed electron beam for free electron laser FEL The main part of the system located inside the tank filled with SF6 gas and has -300 kV potential. It's supplied through the isolated transformer and controlled through the fiber optic link with CAN interface. The GaN RF transistor in the output stage of modulator composed of hybrid assembly on the BeO ceramic plate. Pulsed output voltage of modulator can be regulated 0-120 V on the load 25 Ohm. Time duration is <1 ns. Repetition rate is 0-90 MHz. Start of modulator from timer performed through the 1GHz fiber optic link. The control code was written on C++ language under Windows operating system using QT framework.  
 
WEPPC002 RF Design and Tuning of Linac4 RFQ rfq, linac, dipole, quadrupole 448
 
  • A. France, M. Desmons, O. Piquet
    CEA/DSM/IRFU, France
  • C. Rossi
    CERN, Geneva, Switzerland
  
  In the Linac4 (a part of CERN accelerator complex upgrade), a 3 MeV, 3-meter long, 352 MHz RFQ accelerates a 70 mA H− ion beam from source to DTL input energy. RF design and tuning both rely on the same 4-wire transmission model (TLM), which ensures a consistent control of all RF parameters. 3D simulations are used to determine electrical parameters of TLM in the design process. RFQ end-circuits are designed to minimize sensitivity of RFQ voltage profile to perturbations that might occur during operation, and are tuned with quadrupole rods. Slug tuners size and distribution take into account fabrication tolerances and bead-pull measurement constraints. The three 1-meter long RFQ sections are machined and brazed in CERN. RF bead-pull measurements used to estimate RFQ electrical parameters throughout fabrication steps have not revealed any significant departure from expected values. Vacuum ports position is also adjusted prior to braze using RF measurements. Electrical parameters of end-circuits are derived from sets of five linearly independent bead-pull measurements. Slugs are tuned using a closed-loop algorithm, where "command" quantities are tuner positions, "control" quantities are measured fields, and RFQ inverse transfer function is based on the TLM. Tuning convergence and final accuracy will be presented.  
 
WEPPC005 Extreme Density Charge Electron Bunches electron, target, linac, radiation 456
 
  • S. Proskin, A. Kulago
    MEPhI, Moscow, Russia
  
  This paper presents untraditional approach for obtaining the DLWG limited bunch charge (LBC). The maximum energy of accelerated bunch is considered. As a result the bremsstrahlung maximum dose rate evaluation is obtained  
 
WEPPC009 Using Genetic Algorithms for Electrode Shape Optimization in Accelerators with RF Focusing focusing, simulation, linac, acceleration 461
 
  • A.V. Samoshin, K.A. Aliev, S.M. Polozov
    MEPhI, Moscow, Russia
  
  The drift tubes shape choice which provides the require distribution of the spatial harmonics amplitudes of RF field is an important problem in the design of RF focusing accelerators. It is necessary to have various relationships of the main (accelerating) and the first (as main focusing) harmonics of RF field for different types of accelerators. High order harmonics should be negligible for accelerators with an external focusing, and this ratio should be E1/E0 = 3-5 for the efficient operation of the axially symmetric RF focusing accelerator. Thus, the distribution and harmonic amplitude's ratios at the accelerator axis which provides stable beam dynamics are always known. The drift tubes shape study problem cannot be solved directly by ordinary methods because of unknown boundary conditions belongs to a class of ill-posed problem. At present, this problem can be solved by using genetic algorithms (GA). For this purpose, the electrode shape will be represent as the polynomial function, and then solve the Laplace equation with boundary conditions of Dirichlet and Neumann. The necessary electrodes shape can be quickly and easily simulated using the adaptive search.  
 
WEPPC019 Improvement of Quadrupole Magnets Field Quality in Serial Production insertion, quadrupole, octupole, sextupole 486
 
  • A.A. Starostenko, P.N. Burdin, T.A. Devyataikina, E.S. Kazantseva, T.V. Rybitskaya, B.A. Skarbo, A.S. Tsyganov
    BINP SB RAS, Novosibirsk, Russia
  
  Technology of production of quadrupole magnets for NSLSII main ring is presented in the article. Quadrupoles have laminated iron yokes. The technology was developed in Budker Institute of Nuclear Physics. It includes method of correction octupole and sextupole harmonics. Field quality measurements of ready magnets are presented.  
 
WEPPC022 Stand for Precision Measurements of Magnetic Lenses Field Quality quadrupole, synchrotron, octupole, power-supply 495
 
  • A.S. Tsyganov, A.M. Batrakov, E.S. Kazantseva, A.V. Pavlenko, T.V. Rybitskaya, D. Shichkov, B.A. Skarbo, A.A. Starostenko, P. Vobly
    BINP SB RAS, Novosibirsk, Russia
  
  Strict requirements are imposed on the field quality of magnetic elements in today’s synchrotron radiation sources. For example, magnetic field harmonics of quadrupole lenses (currently manufactured in BINP) of main ring NSLS-II, should have no more than one or two ten-thousandths parts of main harmonic at the 75% of lens aperture. The stand is designed for precise measurement of the quadrupole lenses. The well-known technique with a rotating coil was used. The design and location of coils used in the measuring shaft and the method of commutation allow to compensate for both quadrupole and dipole components of the magnetic field. This, in turn, minimizes shaft beats effect and power supply noises effect on the accuracy of the results. During measurements, the shaft is rotated without stopping, and the data received from the gauge angle and digital integrators are processed "on the fly" strictly synchronous. The measurement procedure is performed in one and a half turn of the shaft and takes six seconds. The report describes mechanical design of the stand, principle of work, parameters of the equipment, and software. Results of measurements of the quadrupole lenses synchrotron source NSLS-II are given in conclusion. The results demonstrate possibilities of the stand.  
 
WEPPC027 Correcting Magnet Power Supplies for the NSLS-II Booster booster, dipole, sextupole, synchrotron 500
 
  • K.R. Yaminov, O.V. Belikov, P.B. Cheblakov, A.I. Erokhin, S.E. Karnaev, V.V. Kolmogorov, A.S. Medvedko, S.R. Singatulin
    BINP SB RAS, Novosibirsk, Russia
  
  Budkers Institute of Nuclear physics builds booster for syncrotron light source NSLS-II. Booster should accelerate electrons from energy 200 MeV to energy 3 GeV, acceleration phase duration is 250 ms, repetition rate – up to 2 Hz. Booster magnet system includes 16 sextuples and 36 dipole correcting magnets powered separately. Forth-quadratant current sources for sextuples and correcting magnets have maximum output current ±6 А, maximum output voltage ±100 V, maximim output current ripples and long-term stability are better than 0,1% relative to 6 A. In ramping mode with current slew rate up to 200 A/s time lag between setpoint and output current is not more than 1msec and can be compensated by software. Results of power supplies system tests and commissioning will be presented in paper.  
 
WEPPC028 High Voltage Terminal in COSY Electron Cooler high-voltage, power-supply, electron, gun 503
 
  • V.A. Chekavinskiy, E.A. Bekhtenev, I.A. Gusev, M.N. Kondaurov, V.R. Kozak, E.A. Kuper, V.R. Mamkin, A.S. Medvedko, D.N. Pureskin, D.V. Senkov, D.N. Skorobogatov
    BINP SB RAS, Novosibirsk, Russia
  
  In Budker INP SBRAS was developed electron cooler with energy up to 2MeV for COSY accelerator (Germany). Due to restricted footprint, cooler's collector and gun parts were combined in a single acceleration system – high voltage terminal. All power and control electronics were placed in a single isolated volume, filled with SF6 gas under 4-6 atm. pressure. Electronics is controlled via wireless CAN, and powered by multistage transformer, capable of 15 kW power at 26 kHz. Wireless control is passed through dedicated optically transparent window, also served for modulated laser beam, used in electron beam diagnostic. By construction, electronics is divided on two standalone units: collector power supply and gun-filter system (SGF). SGF is built on 19" EuroPak chassis, where were placed all power modules, needed for collector and gun pipe electrodes. All power outputs were protected against overvoltage and sparks, available while cooler exploitation. In SGF there were controlled up to 40 parameters altogether. SGF inner power supply provides stable operation in wide range of input voltage, up to ±50% from nominal. Also included in SGF are 2 auxiliary systems, used for beam guiding and beam diagnostics.  
 
WEPPC030 High-Voltage Source with Output Voltage up to 110 kV with Output Current up to 100 mA high-voltage, feedback, interlocks 506
 
  • I.A. Gusev, A.S. Medvedko, A.Yu. Protopopov, D.N. Pureskin, D.V. Senkov
    BINP SB RAS, Novosibirsk, Russia
  
  The presented report contains the description of high-voltage source with output voltage up to 110 kV and output current up to 100 A. The source consist of the chopper with IGBT switches working with a principle of pulse-width modulation and the full H-bridge converter with IGBT switches, both working on programmed from 15 to 25 kHz frequency, and the high voltage transformer powering the four-stage multiplier with the additional capacity filter at output. The transformer and multiplier both is made in oil tank with silicon oil. The additional capacity filter provides low ripple and noise level in working range of output currents. A nominal output voltage of the source is 110 kV. The source can operate in normal mode with series of high-voltage breakdown in output voltage. In the high-voltage breakdown the released in load and matching circuit energy is less than 20 J at maximum operating voltage 120kV. The efficiency of system is more than 80% at the nominally output power 11 kW. The controller of the source is developed with DSP and PLM, which allows optimizing operations of the source. For control of the source serial CAN-interface is used. The description of the source and the test results are presented.  
 
WEPPC031 3-Channel Current Source with Channel Output Current up to 180 A and Output Voltage up to 180 V quadrupole, power-supply, feedback, synchrotron 509
 
  • D.V. Senkov, A.I. Erokhin, I.A. Gusev, V.V. Kolmogorov, A.S. Medvedko, S.I. Potapov, D.N. Pureskin
    BINP SB RAS, Novosibirsk, Russia
  
  The presented report contains the description of 3-channel current source with channel output current up to 180 A and output voltage. Each channel can be operated and controled independently. The source consists of 2 part. First part is charging source with capasitance bank at output. And the second part is 3 current sources powered by a capacitance bank. The charging source is converter with IGBT switches, working with a principle of pulse-width modulation on programmed from 15 to 25 kHz frequency, with high power rectivier at output. The source output voltage is up to 180 V, peak power is 40 kW and average power is 20 kW. Capacitance bank has 120 kVA storage energy. Second part contains 3 independent current sources with up to 180 A output current each. Each current source consist of H-bridge 2-quadrant convertor with MOSFET switches working on 50 kHz frequency and tho output LC filter. The controllers of the sources is developed with DSP and PLM, which allows optimizing operations of the sources. The controllers are connected by internal control network for more flexibility and efficiency. The description of the source and the test results are presented.  
 
WEPPC032 The Power Supply System for the Accelerating Column of the 2 MeV Electron Cooler for COSY high-voltage, electron, solenoid, power-supply 512
 
  • D.N. Skorobogatov, M.I. Bryzgunov, A.D. Goncharov, I.A. Gusev, M.N. Kondaurov, V.R. Kozak, A.S. Medvedko, V.V. Parkhomchuk, D.N. Pureskin, A.A. Putmakov, V.B. Reva, D.V. Senkov
    BINP SB RAS, Novosibirsk, Russia
  
  The electron cooler of a 2 MEV for COSY storage ring FZJ is assembling in BINP. The high energy electron beam produced by the electrostatic accelerating column. The power supply for accelerating column of the electron cooling system consists of 33 distributed by the accelerating potential controlled modules. Each module has precision controlled voltage source 60 kV 1mA, and additional supply for the magnetic system solenoid with a maximal current of 2.5 amperes. All the system controlled through wireless ZIGBEE network. The report presents the structure of the power system, its parameters and the results of tests carried out in BINP.  
 
WEPPC035 System of Vacuum Monitoring of Synchrotron Radiation Source of National Research Center Kurchatov Institute vacuum, synchrotron, high-voltage, radiation 518
 
  • N.I. Moseiko, V. Korchuganov, D.G. Odintsov
    NRC, Moscow, Russia
  • Y.V. Krylov, L.A. Moseiko, A.V. Shirokov
    RRC, Moscow, Russia
  • B.I. Semenov
    RRC KI, Moscow, Russia
  
  The source of synchrotron radiation of National Research Center Kurchatov Institute (KCSR) consists of the main ring on energy of electrons of 2.5 GeV, the booster ring on the maximum energy of 450 MeV and 80 MeV linac. The project of upgrade of KCSR vacuum system, including transition to new power supplies for sputter ion pumps is developed and is implemented. The vacuum system provides vacuum of 0.1 mkPa. The new vacuum system is developed on the basis of the modern high-voltage power supply of the VIP-27 type controlled by the interface units of the BUP-27 type, is placed in standard crate 3U Euromechanics. VIP-27 is controlled the four pumps of PVIG 250/600 type. The vacuum system is controlled from the Pentium computer on the CAN bus. Now the upgraded system serves about 100 vacuum pumps. Power supply unit provides voltage up to 7 kV. The vacuum monitoring is provided by measurements of the current of the power supply unit in the range of 0.0001-10 mA. The status display and the data archive based on MS SQL Server.  
 
WEPPC038 RF Power and Control Systems for Phased Dipoles Array System for Hyperthermia dipole, electromagnetic-fields, focusing, site 524
 
  • A.M. Fadeev, V.N. Belyaev, A.A. Blinnikov, S.M. Polozov
    MEPhI, Moscow, Russia
  • E.A. Perelstein
    JINR, Dubna, Moscow Region, Russia
  
  Cylindrical array of independently phased dipoles is suggested for hyperthermia of deep-situated tumors as a kind of treatment of cancer coupled with other methods such as radiation therapy and chemotherapy. It was proposed to focus the maximum of electromagnetic field at the site of tumor to produce high efficiency heating of tumor and to prevent overheating of surrounding healthy tissues. That's why we use system of independently fed dipole antennas. The operating frequency is 150 MHz. The independent feeding permits us to focus electromagnetic field producing by phased array in desirable area by means of changing of amplitudes and phases of each dipole. The RF power system schematic layout for 8 independently phased dipole antennas is presented. The control system of RF power system elements is considered. The software developing to provide choosing amplitude's and phase's values of dipoles are discussed.  
 
WEPPC047 Operational Experience with 55 MeV Pulsed RTM linac, klystron, high-voltage, radiation 538
 
  • V.V. Khankin, N.I. Pakhomov, V.I. Shvedunov
    MSU, Moscow, Russia
  • A.I. Karev, V.G. Raevsky
    LPI, Moscow, Russia
  
  Operational experience with 55 MeV RTM * is reported. After RTM commissioning described in * it was installed in specially built bunker with 60-80 cm thick barite concrete walls placed in accelerator hall in order to protect detector equipment from parasitic radiation. New equipment was installed at RTM including new pulsed modulator, high power vacuum window and circulator, new cooling system, additional steering coils. Control system software based on LabView was also modified to make RTM tuning easier. Introduced changes made RTM operation more stable, beam transmission through RTM was improved. After re-commissioning RTM is used for experiments in nuclear physics, in PET isotope production research, in explosive detection experiments etc.
*A.I.Karev, A.N.Lebedev, V.G.Raevsky, A.N.Ermakov, A.N.Kamanin, V.V.Khankin, N.I.Pahomov, V.I.Shvedunov, etc., 55 MeV special purpose race-track microtron commissioning, in Proc. RuPAC-2010, p.316-318 		 
 
WEPPC051 Proton Channel that Provides Simultaneous Independent Operation of a Treatment Room of Proton Therapy and Neutron Sources of the Experimental Complex INR RAS proton, neutron, septum, target 544
 
  • E.V. Ponomareva, S.V. Akulinichev, M.I. Grachev, L.V. Kravchuk
    RAS/INR, Moscow, Russia
  • V.N. Zapolsky
    IHEP, Moscow Region, Russia
  
  The manufactured magneto-optic channel in the experimental complex of Moscow meson factory INR RAS, the system of splitting beams into a neutron source and the channel for medical application are specified. The system of independent adjustment of energy of protons for a medical channel is described.  
 
WEPPC052 Beam Scanning System of Linear Accelerator for Radiation Processing extraction, electron, beam-losses, vacuum 547
 
  • M.I. Demsky, V.V. Krotov, D.E. Trifonov
    CORAD Ltd., St. Petersburg, Russia
  
  The report represents a beam scanning system for irradiation of opposite sides of the boxes during one pass. This beam scanning system contains the well-known scanning system composed of scanning magnet and vacuum chamber with the beam extraction window covered by titanium foil. The bending magnet, which is located on the edge of this vacuum chamber, turns the electron beam to the metallic pipe, connected with the vacuum chamber. The metallic pipe goes sideways from the irradiated boxes and is connected with the second vacuum chamber, located inside of a 180 degrees bending magnet. Electrons are turning on 180 degrees and scanning along the opposite side of the boxes due to the hyperbolic shape of the current in a coil of the 180 degrees bending magnet. Therefore, electrons are scanning along one side of the box, then round the box sideway through the metallic pipe and scanning along the opposite side of this box after turning 180 degrees. The full cycle of the scanning can be repeated up to 6 times per second. The experimental results of this system operation with 10 MeV, 12 kW electron beam are given in this report.  
 
WEPPC053 The IDK-6/9MeV Linear Electron Accelerator and its Application in the Customs Inspection System electron, cathode, interlocks, radiation 549
 
  • V.P. Malyshev, B.O. Bolshakov, P.O. Klinovskiy, K.V. Kotenko, A.V. Sidorov, V. Smekalkin
    NIIEFA, St. Petersburg, Russia
  
  A linear electron accelerator IDK-6/9МeV has been designed for operation as a source of ionizing radiation in a customs inspection system intended for inspection of large-scale cargos. The main operating mode of the accelerator is the X-ray mode with an energy of 6 MeV, which ensures the penetrability (for steel) more than 300 mm. The operating mode of the accelerator can be quickly changed for 9 Mev, which allows the objects under study to be discriminated based on the organics/non-organics criterion using the "two energies" method. A triode electron source with cathode and grid modulators is applied in the accelerator. A system of collimators located at the output of the accelerating device ensures shaping of an X-ray beam fan-shaped in the vertical plane with an opening angle of 460 directed towards the detector line. The accelerator is equipped with a computerized system of protective interlocks and control, which makes possible its operation both in the setting mode and as a component of the whole customs inspection system.  
 
WEPPC056 Improving of Uniformity of the Electron-Beam Treatment of Materials by ELV Accelerators electron, radiation, scattering, focusing 557
 
  • D.A. Kogut, S. Fadeev, N.K. Kuksanov
    BINP SB RAS, Novosibirsk, Russia
  
  The problem of the absorbed dose distribution during the EB treatment by ELV accelerator is considered. The value of the absorbed dose is determined by the speed of scanning electron beam along the accelerator exit window (i.e. the movement across the conveyor). It is determined both by the shape of scanning current and by the geometry of scanning magnets. A simple way to improve the dose distribution near the edges of the extraction device of accelerator is suggested. It allows to provide the non-uniformity less 4%.  
 
WEPPD012 Standing Wave RF Deflectors with Reduced Aberrations impedance, emittance, cavity, diagnostics 590
 
  • V.V. Paramonov, L.V. Kravchuk, P. Orlov
    RAS/INR, Moscow, Russia
  • K. Flöttmann
    DESY, Hamburg, Germany
  
  Funding: in part RBFR N 12-02-00654-a
Deflecting structures are now widely used for bunch phase space manipulations either with bunch rotation for special bunch diagnostic or in emittance exchange experiments. Even if the field of synchronous harmonic is aberration free, the higher space harmonics provide non linear additives in the field distribution, leading to emittance growth during phase space manipulation. Standing wave operation is more RF efficient for short deflectors. The criterion of the field quality estimation and results is of deflecting structure consideration for minimization of non linear additives are presented. The solutions for dispersion correction together with end cells optimization are described too. 		 
 
WEPPD024 The Quench Detection System for Superconducting Elements of Nuclotron Acceleration Complex dipole, quadrupole, power-supply, monitoring 605
 
  • A.O. Sidorin, E.V. Ivanov, G.V. Trubnikov
    JINR, Dubna, Moscow Region, Russia
  
  The system provides highly effective detection of quenches in superconducting elements of Nuclotron. Full information about quench element is transmitted to control room. Diagram of analogue quench signal could be displayed on screen for further analysis. The system performs scheduled self-test diagnostics in real time and controls power elements of energy evacuation.  
 
WEPPD028 Beam Position Monitor System for 2 MeV Electron Cooler for COSY electron, proton, gun, high-voltage 608
 
  • E.A. Bekhtenev, V.P. Cherepanov, G.V. Karpov, V.B. Reva, E. Shubin, D.N. Skorobogatov
    BINP SB RAS, Novosibirsk, Russia
  
  The 2 MEV electron cooler for COSY storage ring FZJ is assembling in BINP. Beam position monitor (BPM) system for orbit measurements has been developed and fabricated at BINP. The system contains 2 BPMs inside the cooling section and 10 BPMs in transport channels Continuous electron beam is modulated with a 3 MHz signal for capability to get signals from pickup electrodes. The beam current modulation can be varied in the range of 0.3-1.5 mA. The BPMs inside the cooling section can measure both electron and proton beams. It is achieved by means of switching the reference signals inside the BPM electronics. The BPM electronics provides highly precise beam position measurements. Relative position measurement error doesn’t exceed 1 micron. Design features of the BPM system, its parameters and testing results are presented in this paper.  
 
WEPPD032 Multimode Digital Integrators For Precise Magnetic Measurements induction, vacuum, booster, synchrotron 617
 
  • A.V. Pavlenko, A.M. Batrakov, D. Shichkov
    BINP SB RAS, Novosibirsk, Russia
  • P.V. Vagin
    DESY, Hamburg, Germany
  
  The induction method of magnetic measurement is the most important, widely used and oldest measurement method for particle accelerator magnets. Nevertheless, both the new demands of the accelerator techniques and possibilities of modern electronics stimulate the creation of more accurate and fast instrumentation, based on the induction method. This report describes the multimode integrators intended for magnetic measurements with the relative accuracy better than 10-4 and even better than 10-5 in special cases. Integrators provide high accuracy level both for the constant magnetic field measurements using movable coils and for the pulse measurements also. Modern digital techniques are used to get the partial integral of signal in the strongly determined time interval. The paper considers theoretical issues of the digital integration technique and related error sources. The structure of digital integrator is presented, and key features are listed. In conclusion a brief description of two magnetic measurement systems is given. The first system is used to measure the magnetic field transverse distribution in pulse elements, and the second one – to measure the harmonics in magnetic lenses with constant field.  
 
WEPPD033 The System for Control of an Electron Beam Welding Machines power-supply, cathode, high-voltage, gun 620
 
  • V.V. Repkov, E.A. Kuper, A.Yu. Protopopov, A.A. Zharikov
    BINP SB RAS, Novosibirsk, Russia
  
  The report examines the main problems that had to be overcome in developing the system for control of an electron beam welding machines. The electronics of the system is under potential of the accelerating voltage (60 kV), therefore it required solving the problem of power transmission and control signals. The volume of the device had to be minimized as the place to put the electronics was limited. The electronics must be resistant to high voltage breakdowns as when breakdowns there may be a voltage pulse of 60 kV with energy to 20 J in any of the cathode electrode unit. The power, necessary for the heater, can reach 250 W. To solve this task the stabilized power supply with an adustment range of 0-125 A (2.5 V) current was developed. The power needed for this power supply operating is transmitted via a special high frequency (25 kHz) transformer. The isolation voltage between the primary and secondary windings of the transformer is 100 kV. To control the current of the beam (welding current), a linear amplifier, which generates the voltage on the control grid in the range 0–4 kV, was developed. The amplifier bandwidth is 1 kHz. To control the current beam, current intensity, and to control the parameters of the gun, a specialized controller was developed. The connection of the controller with a computer is carried out with the help of optical links.  
 
WEPPD039 Development of the New Control Systems for JINR e- Linac Accelerator Test-Bench radiation, gun, electron, cathode 626
 
  • M.A. Nozdrin, N. Balalykin, V. Minashkin, V.Y. Schegolev, G. Shirkov, G.V. Trubnikov
    JINR, Dubna, Moscow Region, Russia
  
  Linear accelerator test-bench in the Joint Institute for Nuclear Research is based on the part of the accelerator complex which was transferred to the possession of JINR by the National Institute for Subatomic Physics (NIKHEF, Amsterdam). Analysis of the transferred accelerator equipment has shown that full re-engineering is required for its control systems; all other systems are in good condition and have considerable endurance. Results of development and creation of the Electron Gun Control System (EGCS), Video and Analog Signals Control System (VASCS) and Automatic System of Radiation Safety Control (ASRSC) are presented. These systems allowed achieving a commissioning of the first accelerator section of the bench with current of 3 mA in 1 us pulse and at beam energy of 23-25 MeV.  
 
WEPPD040 Precision Thermostatic Control for LUE-200 Accelerator Section linac, neutron, electron, diagnostics 629
 
  • V.N. Zamriy, A.P. Sumbaev
    JINR, Dubna, Moscow Region, Russia
  
  According to the design of the IREN facility the system of thermostatting of LUE-200 linac sections is developed. Rated values of linac beam power depend basically on a microwave power input and stability of the phase. The latter is sustained by means of thermostatic control for the sections subject to the powerful microwave warming-up. Demanded both high accuracy of stabilization and low settling time of temperature for linac modes define development of the control system. The precise system of thermostatic control in which composition the programmable PID-controller and the platinum resistance thermometer with accuracy of 0.1%, and also thyristor regulators of heating power up to 15 kVА has been adapted for modes of the IREN microwave facility. The advanced system allows to control both power of heating and a flow of cooling water. The system supervises and changes over modes of the accelerated warming-up and controllable heating and cooling. Both high accuracy of the thermostat and energy saving at a smooth settling of temperature and at the subsequent long-term thermostabilization are substantially improved. Essential speed-up of a preliminary warming-up of the thermostat also is attained.  
 
WEPPD042 Vacuum Automatic Control System (ACS) for NICA Project vacuum, ion, monitoring, heavy-ion 635
 
  • R.V. Pivin, A.R. Galimov, H.G. Khodzhibagiyan, A.V. Smirnov
    JINR, Dubna, Moscow Region, Russia
  • A.M. Bazanov, A.V. Butenko, A. Nesterov, G.V. Trubnikov
    JINR/VBLHEP, Dubna, Moscow region, Russia
  • P. Hedbavny
    Pfeiffer Vacuum GmbH, Asslar, Germany
  
  Development of the automatic control vacuum system (ACVS) for NICA project was beginning. The first step of this work was Nuclotron vacuum system modernization. It were installed new vacuum pumps and gauges with RS-232, RS-485 and ProfiBus interfaces. Devices were combined to the net with central controller at Linac control room. The result of the modernization was creation of remote control, monitoring and automatic protective system. Next step of ACVS creation will be Linac vacuum system automatization. Experience of the Nuclotron vacuum system modernization will be applied for NICA ACVS development.  
 
WEPPD043 Concept of the Software for ITEP-TWAC Control System diagnostics, synchrotron, proton 638
 
  • P.N. Alekseev, F.A. Sizov
    ITEP, Moscow, Russia
  
  The work is in progress on the development of new control system for ITEP accelerators complex. All the software for the system should be developed from the very beginning. Core element of new software is PostgreSQL object-relational database management system. All interaction between the programms on device side and on operator side are made utilizing the database functionality. The database is also provides storage space for all configuration data, operational modes, logs and so on.Concept of the software for ITEP-TWAC control system.  
 
WEPPD044 Developing of the Synchronization System for Accelerating-Storage Facility ITEP-TWAC target, linac, heavy-ion, status 641
 
  • A.Y. Orlov, P.N. Alekseev, S.V. Barabin, D.A. Liakin
    ITEP, Moscow, Russia
  
  The renovation of the ITEP-TWAC synchronization system is a complex and challenging matter. This system must provide a full-scale timing signal set for all existing and foreseeing modes of operation of the two-ring accelerator facility. Complete design covers all levels of a design hierarchy like decision concerning the new system architecture or basic electronic modules development. In this article we present a description of most important parts of the synchronization system.  
 
WEPPD049 Software for Virtual Accelerator Environment simulation, lattice, EPICS, space-charge 653
 
  • N.V. Kulabukhova
    St. Petersburg State University, St. Petersburg, Russia
  
  The article discusses appropriate technologies for software implementation of the Virtual Accelerator. The Virtual Accelerator is considered as a set of services and tools enabling transparent execution of computational software for modeling beam dynamics in accelerators on distributed computing resources. Control system toolkits EPICS, realization of the GUI with existing frameworks and visualization of the data are discussed in the paper. The presented research consists of software analysis for realization of interaction between all levels of the Virtual Accelerator.  
 
WEPPD052 Modernization of the Automated Control System in the Kurchatov Synchrotron Radiation Source vacuum, synchrotron, synchrotron-radiation, radiation 659
 
  • E.V. Kaportsev, V. Dombrovsky, Y.V. Efimov, V. Korchuganov, Y.V. Krylov, K. Moseev, N.I. Moseiko, A.G. Valentinov, Y.L. Yupinov
    NRC, Moscow, Russia
  
  The running cycle of Kurchatov Synchrotron Radiation Source (KSRS) includes the injection of electrons with energy 80 MeV from the linear accelerator in the booster storage ring Siberia-1, the accumulation of a electron current up to 300 mA and, then, electron energy ramping up to 450 MeV with the subsequent extraction of electrons in the main ring, storage ring Siberia-2, and accumulation there up to 200 mA, and at last the energy ramping up to 2.5 GeV. The current automated control system (ACS) of the accelerating-storage complex (ASC) "SIBERIA" was established more than 20 years ago on the basis of the control equipment in the CAMAC standard. It is physically and morally outdated and does not meet modern requirements for speed, accuracy and speed of data transmission. This paper presents some options for replacing the old control system ESC to more modern components, using high-speed processor modules VME, and high-speed industrial network CAN.  
 
WEPPD053 New Electron Beam Reference Orbit Measurement System at Dedicated Synchrotron Radiation Light Source SIBERIA-2 electron, brilliance, radiation, synchrotron 662
 
  • Y.A. Fomin, V. Korchuganov, A.G. Valentinov
    NRC, Moscow, Russia
  • R. Hrovatin, P. Leban
    I-Tech, Solkan, Slovenia
  • N.I. Moseiko
    RRC, Moscow, Russia
  
  The paper focuses on the project of the electron beam closed orbit measurement system at SR source SIBERIA-2 realizing at present time at Kurchatov Institute. The main purpose of new closed orbit measurement system creation is an improvement of the electron beam diagnostic system at storage ring. In addition, it will be a part of fast feedback system which will damp the distortions of the closed orbit at SIBERIA-2. This system provides continuous measurements of the electron beam closed orbit during storing, ramping and operation for users. Besides, with the help of the system it is possible to carry out turn-by-turn measurements of the electron beam trajectory during injection process. The paper describes the new orbit measurement system, the principle of operation and its technical characteristics.  
 
WEPPD054 Some Aspects of the Cavity Resonant Frequency Control System Heater Operating Point Choice linac, cavity, acceleration, DTL 665
 
  • V.V. Grechko, G.I. Yamshikov
    RAS/INR, Moscow, Russia
  
  To adjust and to stabilize a resonant frequency of the accelerating cavities INR Linac comprises a Cavity Resonant Frequency Control System (CRFCS). The main final control element of the system is an electric heater (EH). Operating point of EH determines power consumption of the system and rf power feed in duration. Electromagnetic noise originated from thyristor regulators of the heaters and influencing linac electronics also depends on the operating point. One of the most sensitive systems is Fast Beam Interlock System (FBIS) intended for prevention of excessive activation and damage of linac components. To exclude false responses of FBIS and to decrease power consumption of CRFCS operating point of the heater has been shifted to a range of smaller power. This approach has been tested during several beam runs with the following results: no false responses of FRIB were observed; the quality of frequency stabilization during beam runs remained at the same level; relatively rare restarts of RF channels did not increase a downtime to beam time ratio; CRFCS power consumption was decreased twice. The rf power feed in duration increased insignificantly.  
 
WEPPD060 Distributed Control System for an Industrial Electron Beam Accelerator electron, vacuum, high-voltage, gun 680
 
  • V. Sharma
    BARC-EBC, Mumbai, India
  
  Funding: Bhabha Atomic Research Center, Trombay, Mumbai
A 3MeV DC Electron beam accelerator has been developed at Electron Beam Center, BARC, Mumbai, India. PLC based distributed control system has been incorporated for the control of the accelerator. A touch screen user interface (HMI) based control system provides a single point control of the whole accelerator. The accelerator operation data is stored in the memory Flash card of the HMI. The Accelerator has many subsystems such as scan magnet supply to scan the electron beam, Chiller unit to supply chilled water to the accelerator for cooling,vacuum system to maintain the vacuum inside the beam line,high voltage unit to generate the EHV for electron acceleration and other support system. All the above subsystems have to be controlled from the central location in order to operate the accelerator safely. Each of the subsystem has been controlled by a PLC controller independently and their control and safety is ensured by the program logic algorithm. After each of the subsystem has been tested separately all the PLCs are connected to the central PLC on modbus RS232 and modbus TCP-IP. The main central PLC has been programmed to fetch the data from individual subsystems PLCs and provide control and monitoring of the accelerator. In auto mode of operation setting the accelerator parameters operates all the subsystems automatically.