Keyword: rfq
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MOODB01 Dynamics of the IFMIF Very High-intensity Beam emittance, space-charge, linac, cryomodule 53
 
  • P.A.P. Nghiem, R.D. Duperrier, A. Mosnier, D. Uriot
    CEA/DSM/IRFU, France
  • N. Chauvin, O. Delferrière, W. Simeoni
    CEA/IRFU, Gif-sur-Yvette, France
  • M. Comunian
    INFN/LNL, Legnaro (PD), Italy
  • C. Oliver
    CIEMAT, Madrid, Spain
 
  For the purpose of material studies for future nuclear fusion reactors, the IFMIF deuteron beams present a simultaneous combination of unprecedentedly high intensity (2x125 mA CW), power (2x5 MW) and space charge. Special considerations and new concepts have been developed in order to overcome these challenges. The global strategy for beam dynamics design in the 40 MeV IFMIF accelerators is presented, stressing on the control of micro-losses, and the possibility of on-line fine tuning. The obtained results are then analysed in terms of beam halo and emittance growth.  
slides icon Slides MOODB01 [3.807 MB]  
 
MOPC006 A Coupled RFQ-IH Combination for the Neutron Source FRANZ DTL, coupling, cavity, proton 74
 
  • M. Heilmann, O. Meusel, D. Mäder, U. Ratzinger, A. Schempp
    IAP, Frankfurt am Main, Germany
 
  Funding: HIC for FAIR
The Frankfurt Neutron Source at the Stern-Gerlach-Zentrum is driven by a 2 MeV proton linac consisting of a 4-rod-radio-frequency-quadrupol (RFQ) and an 8 gap IH-DTL structure. RFQ and IH cavity will be powered by only one radio frequency (RF) amplifier to reduce costs. The RF-amplifier of the RFQ-IH combination is coupled into the RFQ. Internal inductive coupling along the axis connects the RFQ with the IH cavity ensuring the required power transition as well as a fixed phase relation between the two structures. The main acceleration of 120 keV up to 2.03 MeV will be reached by the RFQ-IH combination with 175 MHz and at a total length of 2.3 m. The losses in the RFQ-IH combination are about 200 kW.
 
 
MOPC017 Thermal Analyses of an RF Input Coupler for the IFMIF/EVEDA RFQ Linac cavity, coupling, linac, beam-transport 101
 
  • S. Maebara
    JAEA, Ibaraki-ken, Japan
 
  In the design of prototype RFQ linac for the IFMIF/EVEDA Project, a coupled cavity type of RFQ, which has a longitudinal length of 9.78m, was proposed to accelerate deuteron beam up to 5MeV. The operation frequency of 175MHz was selected to accelerate a large current of 125mA in CW mode. The driving RF power of 1.28 MW by 8 RF input couplers has to be injected to the RFQ cavity. As the RF input coupler design, RF losses including a loop antenna and an RF vacuum window, based on a 6 1/8 inch co-axial waveguide were calculated. In this conference, these results and thermal analysis results in CW operation mode will be presented in details.  
 
MOPC024 Construction Status of the CPHS RFQ at Tsinghua University quadrupole, dipole, cavity, vacuum 122
 
  • Q.Z. Xing, Y.J. Bai, J.C. Cai, C. Cheng, L. Du, T. Du, X. Guan, Q. Qiang, X.W. Wang, Z.F. Xiong, S.Y. Yang, H.Y. Zhang, S.X. Zheng
    TUB, Beijing, People's Republic of China
  • J.H. Billen
    TechSource, Santa Fe, New Mexico, USA
  • W.Q. Guan, Y. He, J. Li
    NUCTECH, Beijing, People's Republic of China
  • J. Stovall
    CERN, Geneva, Switzerland
  • L.M. Young
    AES, Medford, NY, USA
 
  Funding: Work supported by the “985 Project” of the Ministry of Education of China.
We present, in this paper, the construction status of a Radio Frequency Quadrupole (RFQ) accelerator for the Compact Pulsed Hadron Source (CPHS) at Tsinghua University. The 3-meter-long RFQ will deliver 3 MeV protons to the downstream Drift Tube Linac (DTL) with the peak current of 50 mA, pulse length of 0.5 ms and beam duty factor of 2.5%. The RFQ has been mechanically separated into three sections. A ball-end mill, instead of a forming cutter, is adopted to machine the vane tip due to its varying radius of curvature. The precision of the numerically controlled milling machine has been verified by machining test pieces of aluminum and copper. Fine machining of the vanes was completed in July, 2011. The pre-braze tuning was completed at the beginning of this August.
 
 
MOPC028 Beam Acceleration of DPIS RFQ at IMP ion, laser, ion-source, target 128
 
  • Z.L. Zhang, X.H. Guo, Y. He, Y. Liu, S. Sha, A. Shi, L.P. Sun, H.W. Zhao
    IMP, Lanzhou, People's Republic of China
  • R.A. Jameson, A. Schempp
    IAP, Frankfurt am Main, Germany
  • M. Okamura
    BNL, Upton, Long Island, New York, USA
 
  Beam test of the direct plasma injection scheme (DPIS) is carried out successfully for the first time in China, by setting up a comprehensive test and research platform of RFQ and laser ion source. The C6+ beam is accelerated successfully, and the peak beam current reaches more than 6mA which is measured by a Faraday cup of unique structure. The RF power coupled into the RFQ cavity is also examined, and results reveal that it is the RF power of about 195kW that can produce the peak beam current.  
 
MOPC043 Electromagnetic Simulations of the Input Power Couplers for the ESS-Bilbao RFQ linac, vacuum, cavity, radio-frequency 172
 
  • O. Gonzalez, I. Bustinduy, N. Garmendia, J.L. Munoz, A. Velez
    ESS Bilbao, Bilbao, Spain
  • F.J. Bermejo
    Bilbao, Faculty of Science and Technology, Bilbao, Spain
  • V. Etxebarria, J. Portilla
    University of the Basque Country, Faculty of Science and Technology, Bilbao, Spain
 
  An input power system is currently being designed at ESS-Bilbao in order to inject the RF power provided by a klystron into the RFQ as part of the linac. In this work, some input power couplers based on a coaxial topology are carefully studied from an electromagnetic point of view. As we will show, the electrical properties of the ceramic window used to ensure the vacuum of the RFQ crucially deteriorates the matching of the devices. To overcome this drawback, a full-wave electromagnetic simulator is used to optimize the coupler dimensions in order to minimize both the return and insertion losses.  
 
MOPC044 Design of the Radiofrequency Quadrupole Coldmodel for the ESS-BILBAO Linear Accelerator quadrupole, simulation, dipole, radio-frequency 175
 
  • A. Velez, I. Bustinduy, N. Garmendia, O. Gonzalez, J.L. Munoz, D. de Cos
    ESS Bilbao, Bilbao, Spain
  • F.J. Bermejo
    Bilbao, Faculty of Science and Technology, Bilbao, Spain
  • V. Etxebarria, J. Portilla
    University of the Basque Country, Faculty of Science and Technology, Bilbao, Spain
 
  This work will present the design of the ESS-Bilbao LINAC RFQ cold model. The process goes through the electromagnetic design of the cavity by properly setting the resonant quadrupole and dipole modes, as well as the resonance frequency. The prototype includes the vane modulation designed to accelerate a 75 mA proton beam from 75 keV to 3 MeV, with an operating frequency of 352.2 MHz. To this end, electromagnetic and electrostatic simulations have been performed by means of the commercial software COMSOL. Furthemore, results for the three components of the electrical field distribution will be presented and compared to those calculated by evaluating the 8-term multipole expansion.  
 
MOPC049 Bead-pull Test Bench for Studying Accelerating Structures at RHUL cavity, quadrupole, controls, resonance 187
 
  • S. Molloy
    ESS, Lund, Sweden
  • R. Ainsworth, G.E. Boorman
    Royal Holloway, University of London, Surrey, United Kingdom
  • C. Gabor
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
  • A. Garbayo
    AVS, Eibar, Gipuzkoa, Spain
  • A.P. Letchford
    STFC/RAL, Chilton, Didcot, Oxon, United Kingdom
  • A. Lyapin
    JAI, Egham, Surrey, United Kingdom
  • P. Savage
    Imperial College of Science and Technology, Department of Physics, London, United Kingdom
 
  A bead-pull test stand has been constructed at Royal Holloway, University of London (RHUL) with the ability to provide electric field profile measurements along five degrees of freedom using the perturbation method. In this paper, we present example measurements using the test bench which include a field flatness profile of a 324MHz four vane Radio Frequency Quadrupole (RFQ) model designed as part of the Front End Test Stand (FETS) development at Rutherford Appleton Laboratory (RAL). Mechanical and operational details of the apparatus will also be described, as well as future plans for the development and usage of this facility.  
 
MOPC061 Simulations to Flatten the Field of the FETS RFQ simulation, cavity, dipole, quadrupole 223
 
  • S.R. Lawrie, A.P. Letchford
    STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
  • J.K. Pozimski, P. Savage
    Imperial College of Science and Technology, Department of Physics, London, United Kingdom
 
  A high performance Radio Frequency Quadrupole (RFQ) is the next major component to be installed on the Front End Test Stand (FETS) at the Rutherford Appleton Laboratory (RAL) in the UK. The beam dynamics, RF, thermal and mechanical designs of the RFQ are almost complete and so the copper has recently been purchased with a view to start cutting metal near Summer-time. This report summarizes the simulation work performed to ensure the RF design is sound. This includes performance studies of the end-wall dipole suppression fingers, tuning the frequency of the input and output vane end regions and implementing a simple solution to remove modulation induced field tilt.  
 
MOPC160 Digital LLRF for IFMIF-EVEDA cavity, LLRF, controls, resonance 457
 
  • A. Salom, A. Arriaga, J.C. Calvo, I. Kirpitchev, P. Méndez, D. Regidor, M. Weber
    CIEMAT, Madrid, Spain
  • A. Mosnier
    CEA/IRFU, Gif-sur-Yvette, France
  • F. Pérez
    CELLS-ALBA Synchrotron, Cerdanyola del Vallès, Spain
 
  The IFMIF-EVEDA project aims to build a prototype accelerator (deuteron, 9MeV, 125mA) to be located at Rokkasho, Japan, for design validation of the IFMIF Accelerator. CIEMAT from Madrid, Spain, is in charge of providing the RF systems for this prototype accelerator. The LLRF will adjust the phase and amplitude of the RF drive and the resonance frequency of the cavities. This paper summarizes its main characteristics and Control System integrated in EPICS. The hardware is based on a commercial FPGA board, an analog front end and a local timing system. Each LLRF system will control and diagnose two RF chains and it will handle the RF fast Interlocks (vacuum, arcs, reflected power and multipacting). A specific LLRF will be developed for the special case of the RFQ cavity, with one Master LLRF and three Slave LLRFs to feed the 8 RF chains of the cavity. The conceptual design and other capabilities of the system like automatic conditioning, frequency tuning for startup and field flatness of the RFQ, etc, will be shown in this paper together with the first low power test results of the LLRF prototype and the performance of the Control System.  
 
MOPS026 Start-to-end Beam Dynamics Simulations for the Prototype Accelerator of the IFMIF/EVEDA Project simulation, linac, quadrupole, solenoid 655
 
  • N. Chauvin
    CEA/IRFU, Gif-sur-Yvette, France
  • M. Comunian
    INFN/LNL, Legnaro (PD), Italy
  • O. Delferrière, R.D. Duperrier, R. Gobin, A. Mosnier, P.A.P. Nghiem, D. Uriot
    CEA/DSM/IRFU, France
  • C. Oliver
    CIEMAT, Madrid, Spain
 
  The EVEDA (Engineering Validation and Engineering Design Activities) phase of the IFMIF (International Fusion Materials Irradiation Facility) project consists in building, testing and operating a 125 mA/9 MeV prototype accelerator in Rokkasho-Mura (Japan). Because of high beam intensity and power, the different sections of the accelerator (injector, RFQ, MEBT, Superconducting Radio-Frequency linac and HEBT) have been optimized with the twofold objective of minimizing losses along the machine and keeping a good beam quality. Extensive start-to-end multi-particles simulations have been performed to validate the prototype accelerator design. A Monte Carlo error analysis has been carried out to study the effects of misalignments and field variations. In this paper, the results of theses beam dynamics simulations, in terms of beam emittance, halo formation and beam losses, are presented.  
 
MOPS028 An Ion Beam Matching to a Linac Accelerating-focusing Channel linac, ion, emittance, simulation 661
 
  • A. Orzhekhovskaya, W.A. Barth, G. Clemente, L.A. Dahl, P. Gerhard, L. Groening, M. Kaiser, M.T. Maier, S. Mickat, B. Schlitt, H. Vormann, S.G. Yaramyshev
    GSI, Darmstadt, Germany
  • U. Ratzinger
    IAP, Frankfurt am Main, Germany
 
  Funding: Work supported by HIC for FAIR
A modern linear accelerator of ions is a long chain of different accelerating-focusing structures. The design of new linacs, as well as an upgrade and optimization of operating facilities, requires precise and reliable beam matching with the subsequent sections. Proper matching of the beam to the channel allows to improve the performance of the whole linac and to reduce the specific costs. Additionally it helps to avoide particle loss in high energy high intensity linacs. Generally a matching algorithm combines precisely measured or calculated accelerating-focusing external fields and experimentally obtained details of the beam parameters with an advanced code for beam dynamics simulations including space charge effects. Experimental results are introduced into a code as input data. The described algorithm has already been successfully implemented for several GSI projects: an upgrade of the GSI heavy ion linac UNILAC, an ion linac for the cancer therapy, the proton linac for the FAIR facility, a facility for laser acceleration of ions and others. Measured data and results of beam dynamics simulations leading to an achieved improvement of the linac performance are presented.
 
 
MOPS031 Beam Dynamics Redesign of IFMIF-EVEDA RFQ for a Larger Input Beam Acceptance emittance, focusing, solenoid, optics 670
 
  • M. Comunian, A. Pisent
    INFN/LNL, Legnaro (PD), Italy
 
  For the IFMIF-EVEDA RFQ, a very challenging project of a deuteron CW RFQ at 175 MHz from 0.1 MeV to 5 MeV with 125 mA of current, the input beam characteristics are very important. A lower focusing force in the first part of the RFQ as beam implemented in order to reduce the requirements of the input beam. In the article a full description of the new design will be reported with the changes in the RFQ performances.  
 
MOPS039 High Power Proton Linac Front-End: Beam Dynamics Investigation and Plans for the ESS solenoid, emittance, injection, proton 688
 
  • A. Ponton
    ESS, Lund, Sweden
 
  Beam availibility is one of the major concerns for the designer of high power proton linacs. Since the Radio-Frequency Quadrupole (RFQ) will shape and accelerate the beam in the early stage of its propagation it will have a significant impact on the particle dynamics throughout the rest of the linac. The key role of the RFQ is consequently to deliver high quality beams with optimal transmission. Furthermore understanding the space charge compensation mechanism in the Low Energy Beam Transport line (LEBT) is mandatory if one wants to perform calculations with realistic beams. The European Spallation Source (ESS) has put important R&D efforts in designing the linac front-end and deep beam dynamics studies have been undertaken. Results of the investigation work will be presented. We will then deal with the future plans for the ESS and we will finally give a full description of the RFQ and LEBT scheme.  
 
TUXA01 Status and Challenges of the China Spallation Neutron Source linac, DTL, power-supply, dipole 889
 
  • S. Fu, H. Chen, Y.W. Chen, Y.L. Chi, H. Dong, L. Dong, S.X. Fang, K.X. Huang, W. Kang, J. Li, L. Ma, H.F. Ouyang, H. Qu, H. Sun, J. Tang, C.H. Wang, Q.B. Wang, S. Wang, T.G. Xu, Z.X. Xu, X. Yin, C. Zhang, J. Zhang
    IHEP Beijing, Beijing, People's Republic of China
 
  The accelerator complex of China Spallation Neutron Source (CSNS) mainly consists of an H linac of 80 MeV and a rapid-cycling synchrotron of 1.6 GeV. It operates at 25 Hz repetition rate with an initial proton beam power of 100 kW and is upgradeable to 500kW. The project will start construction in the middle of 2011 with a construction period of 6.5 years. The CSNS accelerator is the first large-scale, high-power accelerator project to be constructed in China and thus we are facing a lot of challenges. This paper presents the current status of CSNS project and summarizes the technology development during the past several years.  
slides icon Slides TUXA01 [3.444 MB]  
 
TUOAA03 The Linac4 Project at CERN linac, DTL, cavity, klystron 900
 
  • M. Vretenar, L. Arnaudon, P. Baudrenghien, C. Bertone, Y. Body, J.C. Broere, O. Brunner, M.C.L. Buzio, C. Carli, F. Caspers, J.-P. Corso, J. Coupard, A. Dallocchio, N. Dos Santos, R. Garoby, F. Gerigk, L. Hammouti, K. Hanke, M.A. Jones, I. Kozsar, J.-B. Lallement, J. Lettry, A.M. Lombardi, L.A. Lopez Hernandez, C. Maglioni, S.J. Mathot, S. Maury, B. Mikulec, D. Nisbet, C. Noels, M.M. Paoluzzi, B. Puccio, U. Raich, S. Ramberger, C. Rossi, N. Schwerg, R. Scrivens, G. Vandoni, J. Vollaire, S. Weisz, Th. Zickler
    CERN, Geneva, Switzerland
 
  As the first step of a long-term programme aiming at an increase in the LHC luminosity, CERN is building a new 160 MeV H linear accelerator, Linac4, to replace the ageing 50 MeV Linac2 as injector to the Proton-Synchrotron Booster (PSB). Linac4 is an 86-m long normal-conducting linac made of an H source, a Radio Frequency Quadrupole (RFQ), a chopping line and a sequence of three accelerating structures: a Drift-Tube Linac (DTL), a Cell-Coupled DTL (CCDTL) and a Pi-Mode Structure (PIMS). The civil engineering has been recently completed, and construction of the main accelerator components has started with the support of a network of international collaborations. The low-energy section up to 3 MeV including a 3-m long 352 MHz RFQ entirely built at CERN is in the final construction phase and is being installed on a dedicated test stand. The present schedule foresees beam commissioning of the accelerator in the new tunnel in 2013/14; the moment of connection of the new linac to the CERN accelerator chain will depend on the LHC schedule for long shut-downs.  
slides icon Slides TUOAA03 [10.347 MB]  
 
TUPS104 A Two Stage Fast Beam Chopper for Next Generation High Power Proton Drivers proton, ion, neutron, ion-source 1786
 
  • M.A. Clarke-Gayther
    STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
 
  The Front End Test Stand (FETS) project at RAL will test a two stage fast beam chopper, designed to address the requirements of high power proton drivers for next generation spallation sources, neutrino factories, and radioactive waste transmutation plants. A description is given of the status of development of the proposed two stage beam chopper. The results of a recent study on the dimensional optimisation of the proposed slow-wave structures, together with details of an updated beam line configuration for the chopper components, will be presented.  
 
WEYA01 Progress of the SPIRAL2 Project ion, ion-source, target, neutron 1912
 
  • E. Petit
    GANIL, Caen, France
 
  The progress of the SPIRAL2 project, the R&D and tests of the key components should be reviewed together with the main challenges for the beam production.  
slides icon Slides WEYA01 [9.313 MB]  
 
WEPC014 Beam Dynamics Simulations of the PIAVE-ALPI Linac simulation, linac, cavity, diagnostics 2034
 
  • M. Comunian, E. Fagotti, F. Grespan, A. Palmieri, A. Pisent, C. Roncolato
    INFN/LNL, Legnaro (PD), Italy
 
  At the Legnaro National Laboratories it is operating a SuperConducting linac for nuclear studies. The ALPI linac is injected either by a XTU tandem, up to 14 MV, or by the s-c PIAVE injector, made with 2 SC-RFQ. The main part of the linac (at the present 64 cavities for a total voltage up to 48 MV) is build up in two branches connected by an achromatic and isochronous U-bend. The PIAVE-ALPI complex is able to accelerate beams up to A/q = 7. The layout of the linac ALPI is, from the point of beam dynamics, quite complex due the presence of RFQs, cavities, dipoles, magnets, etc. These elements behaviors are entirely not linear, so a small change on the settings can induce a big change in the Linac beam dynamics. An automatic tuning procedure and a full field maps description are mandatory to handle a so high number of active components. The program used at this scope is TraceWin that is able to do an envelope simulation and a full multiparticles simulation.  
 
WEPC039 Modelling of the FETS MEBT Line using GPT emittance, simulation, ion, linac 2094
 
  • D.C. Plostinar
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
  • R. Enparantza, M. Larrañaga
    Fundación TEKNIKER, Eibar (Gipuzkoa), Spain
 
  The Front End Test Stand project (FETS) currently under construction at Rutherford Appleton Laboratory (RAL) will accelerate a 60 mA, 2 ms, 50 pps H beam up to 3 MeV. It consists of an H ion source, a three-solenoid low energy beam transport line (LEBT), an RFQ and a medium energy beam transport line (MEBT) with a fast-slow beam chopping system. As part of the MEBT development, a GPT simulation model has been prepared. The aim is to analyse and understand the transport of intense beams and the beam behaviour in the space-charge dominated regime. The beam quality is then evaluated in terms of RMS emittance growth, beam loss, chopping efficiency and halo development. Results previously obtained with different simulation codes are discussed throughout the paper.  
 
WEPC040 Initial 2D Investigations into the Design and Parameters of an EM Quadrupole for FETS quadrupole, simulation, ion, linac 2097
 
  • M. Larrañaga, R. Enparantza
    Fundación TEKNIKER, Eibar (Gipuzkoa), Spain
  • D.C. Plostinar
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
 
  The Medium Energy Beam Transport (MEBT) line for the Front End Test Stand (FETS) at Rutherford Appleton Laboratory (RAL) consists of a number of quadrupoles, re-bunching cavities and a fast-slow chopping system with dedicated beam dumps, as well as diagnostics. The type and design of the quadrupoles to be used merits special attention. Due to space restrictions, a hybrid quadrupole solution has been proposed in the past. However, because of the limited range of field adjustability achievable, this approach is not ideal. In this paper, a very preliminary investigation of an electromagnetic quadrupole (EMQ) design is presented. Magnetic simulations results performed with a 2D simulation code will be discussed including magnet optimisation details.  
 
WEPC041 Conceptual Design of a New 800 MeV H Linac for ISIS Megawatt Developments linac, cavity, DTL, quadrupole 2100
 
  • D.C. Plostinar, C.R. Prior, G.H. Rees
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
 
  Several schemes have been proposed to upgrade the ISIS Spallation Neutron Source at Rutherford Appleton Laboratory (RAL). One scenario is to develop a new 800 MeV, H linac and a ~3 GeV synchrotron, opening the possibility of achieving several MW of beam power. In this paper the design of the 800 MeV linac is outlined. It consists of a 3 MeV Front End similar to the one now under construction at RAL (the Front End Test Stand -FETS). Above 3 MeV, a 324 MHz DTL will be used to accelerate the beam up to ~75 MeV. At this stage a novel collimation system will be added to remove the halo and the far off-momentum particles. To achieve the final energy, a 648 MHz superconducting linac will be employed using three families of elliptical cavities with transition energies at ~196 MeV and ~412 MeV. Alternative designs are also being investigated.  
 
WEPC145 Progress in Developing a PLC Control System for the PKUNIFTY controls, pick-up, cavity, neutron 2331
 
  • J. Zhao, J.E. Chen, Z.Y. Guo, Y.R. Lu, S.X. Peng, Q.F. Zhou
    PKU/IHIP, Beijing, People's Republic of China
 
  A compact remote PLC control system has been developed for the PKUNIFTY (Peking University Neutron Imaging FaciliTY). That facility is based on a 2 MeV deuteron RFQ accelerator. The PLC control system has been successfully used for the injector including ECR ion source and LEBT, and it worked reliably last year. Now the control of RFQ cavity, HEBT and Be target has been completed and tested. The interlock system has been enhanced. A low level RF control system, including the auto frequency control (AFC) and auto gain control (AGC) circuits, has been designed for the RFQ’s RF power system. Those circuits will work as a lower controller of the PLC control system. The main running parameters can be controlled by setting any desired range of values on the HMI. Test results of hardware and software are presented.  
 
WEPS031 Future Heavy Ion Linacs at GSI linac, ion, cavity, heavy-ion 2550
 
  • W.A. Barth, G. Clemente, L.A. Dahl, S. Mickat, B. Schlitt, W. Vinzenz
    GSI, Darmstadt, Germany
 
  The UNILAC-upgrade program for FAIR will be realized in the next three years; the required U28+-beam intensity of 15 emA (for SIS 18 injection). The replacement of the Alvarez-DTL by a new high energy linac is advised to provide a stable operation for the next decades. An additional linac-upgrade option sufficient to boost the beam energy up to 150 MeV/u may help to reach the desired heavy ion intensities in the SIS 100. The SHIP-upgrade program has also to be realized until 2011, such that an enhanced primary beam intensity at the target is available. It is planned to build a new cw-heavy ion-linac behind the present high charge state injector. This linac should feed the GSI flagship experiments SHIP and TASCA, as well as material research, biophysics and plasma physics experiments in the MeV/u-area. The whole injector family is housed by the existing constructions. Different layout scenarios of a multipurpose high intensity heavy ion facility will be presented.  
 
WEPS034 A CW RFQ Prototype simulation, impedance, linac, vacuum 2559
 
  • U. Bartz, A. Schempp
    IAP, Frankfurt am Main, Germany
 
  A short RFQ prototype was built for RF-tests of high power RFQ structures. We will study thermal effects and determine critical points of the design. HF-simulations with CST Microwave Studio and measurements were done. The cw-tests with 20 kW/m RF-power and simulations of thermal effects with ALGOR were finished successfully. The optimization of some details of the HF design is on focus now. First results and the status of the project will be presented.  
 
WEPS035 Beam Measurements with the New RFQ Beam Matching Section at the Frankfurt Funneling Experiment emittance, ion, ion-source, diagnostics 2562
 
  • M. Baschke, A. Schempp, J.S. Schmidt
    IAP, Frankfurt am Main, Germany
  • H. Zimmermann
    Accelerator Services, Oberursel, Germany
 
  Funding: BMBF
Funneling is a method to increase low energy beam currents in multiple stages. The Frankfurt Funneling Experiment is a model of such a stage. The experiment is built up of two ion sources with electrostatic lens systems, a Two-Beam-RFQ accelerator, a funneling deflector and a beam diagnostic system. The two beams are bunched and accelerated in a Two-Beam RFQ. A funneling deflector combines the bunches to a common beam axis. A new beam transport system between RFQ accelerator and deflector has been constructed and mounted. With these extended RFQ-electrodes the drift between the Two-Beam-RFQ and the rf-deflector will be minimized and therefore unwanted emittance growth reduced. After first rf measurements current work are beam tests with the improved Two-Beam-RFQ. First results will be presented.
 
 
WEPS037 RF Design of a 325 MHz 4-ROD RFQ dipole, simulation, linac, quadrupole 2568
 
  • B. Koubek, A. Schempp, J.S. Schmidt
    IAP, Frankfurt am Main, Germany
  • L. Groening
    GSI, Darmstadt, Germany
 
  Usually 4-ROD Radio Frequency Quadrupoles (RFQ) are built for frequencies up to 216 MHz. For higher frequencies 4-VANE structures are more common. The advantages of 4-Rod structures, the greater flexibility for tuning and being more comfortable for maintenance, are motivating the development of a 4-Rod RFQ for higher frequencies than 216 MHz. In particular a 325 MHz RFQ with an output energy of 3 MeV is needed for the proton linac for the FAIR project of GSI. This paper reports about the design studies and the latest developments of this RFQ.  
 
WEPS038 Development of CH-Cavities for the 17 MeV MYRRHA-Injector cavity, proton, DTL, acceleration 2571
 
  • D. Mäder, H. Klein, H. Podlech, U. Ratzinger, M. Vossberg, C. Zhang
    IAP, Frankfurt am Main, Germany
 
  Funding: European Union FP7 MAX Contract Number 269565
MYRRHA is conceived as an accelerator driven system (ADS) for transmutation of high level nuclear waste. The neutron source is created by coupling a proton accelerator of 600 MeV with a 4 mA proton beam, a spallation source and a sub-critical core. The IAP of Frankfurt University is responsible for the development of the 17 MeV injector operated at 176 MHz. The injector consists of a 1.5 MeV 4-Rod-RFQ and six CH-drifttube-structures. The first two CH-structures will be operated at room temperature and the other CH-structures are superconducting cavities assembled in one cryo-module. To achieve the extremely high reliability required by the ADS application, the design of the 17 MeV injector has been intensively studied, with respect to thermal issues, minimum peak fields and field distribution.
 
 
WEPS039 General Layout of the 17 MeV Injector for MYRRHA cavity, linac, proton, ECR 2574
 
  • H. Podlech, M. Busch, F.D. Dziuba, H. Klein, D. Mäder, U. Ratzinger, A. Schempp, R. Tiede, C. Zhang
    IAP, Frankfurt am Main, Germany
  • M. Amberg
    HIM, Mainz, Germany
 
  Funding: European Union FP7 MAX Contract Number 269565
The MYRRHA Project (Multi Purpose Hybrid Reactor for High Tech Applications) at Mol/belgium will be a user facility with emphasis on research with neutron generated by a spallation source. One main aspect is the demonstration of nuclear waste technology using an accelerator driven system. A superconducting linac delivers a 4 mA, 600 MeV proton beam. The first accelerating section is covered by the 17 MeV injector. It consists of a proton source, an RFQ, two room temperature CH cavities and 4 superconducting CH-cavities. The initial design has used an RF frequency of 352 MHz. Recently the frequency of the injector has been set to 176 MHz. The main reason is the possible use of a 4-rod-RFQ with reduced power dissipation and energy, respectively. The status of the overall injector layout including cavity design is presented.
 
poster icon Poster WEPS039 [2.281 MB]  
 
WEPS040 The Driver Linac of the Neutron Source FRANZ proton, neutron, DTL, cavity 2577
 
  • U. Ratzinger, B. Basten, L.P. Chau, H. Dinter, M. Droba, M. Heilmann, M. Lotz, O. Meusel, I. Müller, D. Mäder, Y.C. Nie, D. Noll, H. Podlech, A. Schempp, W. Schweizer, K. Volk, C. Wiesner, C. Zhang
    IAP, Frankfurt am Main, Germany
 
  FRANZ is under construction at the Goethe University Frankfurt. A 2MeV ± 100 keV proton beam will produce 1 keV to 200 keV neutrons on a Li7 target. Experiments are planned in the field of nuclear astrophysics as well as in applied physics. A dc operated proton source with a maximum beam current of 200 mA was successfully beam tested end of 2010. FRANZ will have two experimental areas: One for activation experiments with cw proton beams of a few mA generating a usable neutron flux of some 10 billion per square cm per second, the other one for 250 kHz, 1 ns short neutron bunches generated by 1 ns proton pulses of a few Ampere beam current. A special 2 MeV, 175 MHz high current cavity is realized at present as a RFQ-DTL combination. Novel techniques have been invented to reach the needed pulsed target beam current by a bunch compressor system.
Work supported by HICforFAIR and GSI.
 
 
WEPS041 Tuning of the New 4-Rod RFQ for FNAL resonance, simulation, pick-up, linac 2580
 
  • J.S. Schmidt, B. Koubek, A. Schempp
    IAP, Frankfurt am Main, Germany
 
  For the injector upgrade at FNAL a 4-rod Radio Frequency Quadrupole (RFQ) with a resonance frequency of 200 MHz has been build. With this short structure of only 1.3 m a very compact injector design has been realized. Simulations with CST Microwave Studio® were performed for the design. Their results leading to the RF characterizations of the RFQ and the final RF setup which has been accomplished at IAP of the Goethe-University Frankfurt are presented in this paper.  
 
WEPS043 From EUROTRANS to MAX: New Strategies and Approaches for the Injector Development DTL, cavity, linac, emittance 2583
 
  • C. Zhang, H. Klein, D. Mäder, H. Podlech, U. Ratzinger, A. Schempp, R. Tiede
    IAP, Frankfurt am Main, Germany
 
  Funding: The research leading to these results has received funding from the European Atomic Energy Community’s (Euratom) Seventh Framework Programme FP7/2007-2011 under grant agreement n° [269565].
As the successor of the EUROTRANS project, the MAX project is aiming to continue the R&D effects for a European Accelerator-Driven System and to bring the conceptual design to reality. The layout of the driver linac for MAX will follow the reference design made for the XT-ADS phase of the EUROTRANS project. For the injector part, new design strategies and approaches, e.g. half resonant frequency, half transition-energy between the RFQ and the CH-DTL, and using the 4-rod RFQ structure instead of the originally proposed 4-vane RFQ, have been conceived and studied to reach a more reliable CW operation at reduced costs. In this paper, the design and simulation results of the MAX injector are presented.
 
 
WEPS044 Status of the Ion Source and RFQ Test Bench at the Heidelberg Ion Beam Therapy Centre ion, emittance, ion-source, extraction 2586
 
  • R. Cee, E. Feldmeier, M. Galonska, Th. Haberer, J.M. Mosthaf, B. Naas, A. Peters, S. Scheloske, J. Schreiner, T. Winkelmann
    HIT, Heidelberg, Germany
 
  The possibility of cancer treatment with proton and carbon beams provides HIT (Heidelberg Ion Beam Therapy Centre) with an exceptional feature and gives it a unique position in Europe. In the future, the variety of available ions will be extended towards helium and oxygen. To allow fast switching between three of these ion species an additional ion-source / spectrometer combination will be installed in the LEBT. For comprehensive tests of the new components a dedicated test bench including a beam emittance analyzer has been set up at the HIT facility. It opens up the opportunity to perform detailed investigations of the improved ECR ion source with its enhanced extraction system and the redesigned RFQ of the HIT injector. Parallel to the measurements, the beam optical model of the assembly could be refined to better reproduce the beam diagnostic results. Since August 2010 the test bench has been in operation in different configurations. Behind the RFQ a beamline comprising a phase-probe-based time-of-flight system and beam current measurement devices is set up. The aim is to determine the RFQ working point and to validate the optimizations in terms of particle transmission.  
 
WEPS050 The MEBT Design for the China Accelerator Driven System emittance, cavity, diagnostics, quadrupole 2604
 
  • H. Geng, H.F. Ouyang, J. Tang
    IHEP Beijing, Beijing, People's Republic of China
  • Z. Li, S. Pei, F. Yan
    IHEP Beijng, Beijing, People's Republic of China
 
  The Medium Eneryg Beam Transport (MEBT) line plays an important role in transporting and matching the beam from the RFQ exit to the entrance to the next type of acceleration structures while provides enough beam diagnostics for beam commissing and tuning. The beam dynamics design for the 1GeV China Accelerator Driven System (CADS) is making great progress. In this paper, we will describe the design–both element choosing and beam dynamics study of the 3MeV MEBT for the CADS project.  
 
WEPS051 Linac for the Compact Pulsed Hadron Source Project at Tsinghua University Beijing proton, DTL, linac, neutron 2607
 
  • X. Guan
    TUB, Beijing, People's Republic of China
 
  Funding: Work supported by the “985 Project” of the Ministry of Education of China, & Tsinghua University Independent Science and research Plan 20091081263.
A project of the Compact Pulsed Hadron Source (CPHS) led by the Department of Engineering Physics of Tsinghua University in Beijing, China has been reported in this paper. CPHS consists of a proton linac, a neutron target station (a Be target, moderators and reflector), and a small-angle neutron scattering instrument, a neutron imaging/radiology station, and a proton irradiation station. The accelerator part is composed of an ECR ion source. LEBT section, a RFQ accelerator, a DTL linac and a HEBT. An ECR ion source will give us a up to 60mA at 50keV proton beam with proton ration larger than 85%, and 0. 2 πmm mrad normalized emittance. A short LEBT will be used to matching the beam from ion source to the RFQ entrance. A 3 meters long RFQ machine can accelerate the proton to 3MeV. The Drift Tube Linac with permanent magnets focusing lens will accept the proton beam direct from RFQ. A 4.3 meters length of DTL with 43 cells will accelerate the beam up to 13MeV. The initial phase of the CPHS construction is scheduled to complete in the end of 2012.
 
 
WEPS052 Progress of Linear Injector for SSC at HIRFL linac, ion, simulation, DTL 2610
 
  • Y. He, X. Du, L.P. Sun, Z.J. Wang, C. Xiao, Y.Q. Yang, Y.J. Yuan, X.H. Zhang, Z.L. Zhang
    IMP, Lanzhou, People's Republic of China
  • J.E. Chen, S.L. Gao, G. Liu, Y.R. Lu, K. Zhu
    PKU/IHIP, Beijing, People's Republic of China
  • J. Wang
    Lanzhou University of Technology, People's Republic of China
 
  A heavy ion linear accelerator for Separate Sector Cyclotron (SSC) is constructing at Heavy Ion Research Facility at Lanzhou (HIRFL). It is a new injector for SSC to improve its output beam intensity of 2 times for Super Heavy Experiment (SHE) and 10 times for injection of Cooling Storage Ring (CSR) than old Cyclotron. It has a normal conducting linac at upstream of SSC and one superconducting cryomodule at downstream of SSC to shift beam energy. The designed current of the linac is 0.5 mA and output energy is 0.57 MeV/u and 1.02 MeV/u. Beam dynamic study and prototype fabrication are introduced in the paper.  
 
WEPS053 The Conceptual Design of One of Injector II of ADS in China solenoid, simulation, proton, linac 2613
 
  • Y. He, H. Jia, C. Li, Y. Liu, Z.J. Wang, C. Xiao, Y. Yang, B. Zhang, H.W. Zhao
    IMP, Lanzhou, People's Republic of China
 
  A 10mA / 50 MeV superconducting proton linac as the demo of an ADS driver is designing and constructing in China. One of 10 MeV segments and corresponding prototypes are designed and fabricating at Institute of Modern Physics of the Chinese Academy of Sciences. It consists of 2.5 MeV RFQ and superconducting structure from 2.5 to 10 MeV. The conceptual design and development of prototype are introduced in the paper.  
 
WEPS055 Beam Commissioning Plan of PEFP 100-MeV linac linac, DTL, proton, site 2619
 
  • J.-H. Jang, Y.-S. Cho, H.-J. Kwon
    KAERI, Daejon, Republic of Korea
 
  Funding: This work was supported by Ministry of Education, Science and Technology of the Korean Government.
Proton engineering frontier project (PEFP) is developing a 100-MeV proton linear accelerator. It is scheduled to install the linac at Kyeungju site from the end of 2011. The linear accelerator consists of a 50-keV injector, a 3-MeV radio-frequency quadrupole (RFQ), and a 100-MeV drift tube linac (DTL). An important characteristic of this accelerator is extracting 20-MeV proton beams just after four DTL tanks. In this region, a medium energy beam transport (MEBT) will be installed for matching the proton beam to the following accelerator and extracting proton beams. The 100-MeV proton beams will be supplied to the users through another beam line which is located after the linac. This work summarized the beam commissioning plan of the proton linear accelerator.
 
 
WEPS056 First Beam Test of 81.5 MHz RFQ for ITEP-TWAC simulation, ion, emittance, proton 2622
 
  • V. Andreev, N.N. Alexeev, A. Kolomiets, B. Kondratyev, V.A. Koshelev, A.M. Kozodaev, V.G. Kuzmichev, Y. Orlov, V. Stolbunov, T. Tretyakova
    ITEP, Moscow, Russia
 
  The 4 vane RFQ resonator with magnetic coupling windows as initial part of high-current Heavy Ion Linac for ITEP TWAC Facility is presently under commissioning at ITEP. It was constructed for acceleration of ions with 1/3 charge-to-mass ratio to the energy of 1.57 MeV/u with beam current up to 100 mA. Additional beam dynamics simulations have been carried out for actual fields of the RFQ in order to determine both extreme output beam properties for different ion species with charge-to-mass ratio in the range of 1-0.25 and limitations for high-brightness of the high-current injector. The beam test of RFQ has been started with protons at relatively low electrode voltage for experimental studying the RFQ beam dynamics. First results of the beam test in comparison with beam dynamics simulations are presented.  
 
WEPS058 The Medium Energy Beam Transport Line (MEBT) of IFMIF/EVEDA LIPAc cavity, SRF, vacuum, quadrupole 2628
 
  • I. Podadera, J.C. Calvo, J.M. Carmona, A. Ibarra, D. Iglesias, A. Lara, C. Oliver, F. Toral
    CIEMAT, Madrid, Spain
 
  Funding: Work partially supported by Spanish Ministry of Science and Innovation under project AIC10-A-000441 and ENE2009-11230.
The IFMIF-EVEDA Linear IFMIF Prototype Accelerator (LIPAc)will be a 9 MeV, 125 mA CW deuteron accelerator which aims to validate the technology that will be used in the future IFMIF accelerator. The acceleration of the beam will be carried out in two stages. An RFQ will increase the energy up to 5 MeV before a Superconducting RF (SRF) linac made of a chain of eight Half Wave Resonators bring the particles to the final energy. Between both stages, a Medium Energy Beam Transport line (MEBT) is in charge of transporting and matching the beam between the RFQ and the SRF. The transverse focusing of the beam is controlled by five quadrupole magnets with integrated steerers, grouped in one triplet and one doublet. Two buncher cavities surrounding the doublet handle the longitudinal dynamics. Two movable collimators are also included to purify the beam optics coming out the RFQ and avoid losses in the SRF. From the inputs of the beam dynamics group, CIEMAT is in charge of designing, manufacturing and integrating all the components of the beamline. In this contribution, the MEBT subsystem will be described and the main objectives and issues for each component will be discussed.
 
 
WEPS059 Layout of the ESS Linac linac, cryomodule, cavity, proton 2631
 
  • H. Danared, M. Eshraqi, W. Hees, A. Jansson, M. Lindroos, S. Peggs, A. Ponton
    ESS, Lund, Sweden
 
  The European Spallation Source will use a 2.5 GeV, 50 mA pulsed proton linac to produce an average 5 MW of power on the spallation target. It will consist of normal-conducting part accelerating particles to 50 MeV in an RFQ and a drift-tube linac and a superconducting part with spoke resonators and two families of elliptical cavities. A high-energy beam transport takes the particles through an upgrade section and at least one bend and demagnifies the beam on to the target. The paper will present the current layout of the linac and discuss parameters that define its length from source to target.  
 
WEPS068 Progress towards an RFQ-based Front End for LANSCE beam-transport, linac, neutron, proton 2658
 
  • R.W. Garnett, S.S. Kurennoy, J.F. O'Hara, L. Rybarcyk
    LANL, Los Alamos, New Mexico, USA
  • A. Schempp
    IAP, Frankfurt am Main, Germany
 
  Funding: This work is supported by the U. S. Department of Energy Contract DE-AC52-06NA25396.
The LANSCE linear accelerator at Los Alamos National Laboratory provides H and H+ beams to several user facilities that support Isotope Production, NNSA Stockpile Stewardship, and Basic Energy Science programs. These beams are initially accelerated to 750 keV using Cockcroft-Walton (CW) based injectors that have been in operation for over 37 years. They have failure modes which can result in prolonged operational downtime due to the unavailability of replacement parts. To reduce long-term operational risks and to realize future beam performance goals in support of the Materials Test Station (MTS) and the Matter-Radiation Interactions in Extremes (MaRIE) Facility, plans are underway to develop a Radio-Frequency Quadrupole (RFQ) based front end as a modern injector replacement for the existing CW injectors. Our progress to date will be discussed.
 
 
WEPS090 The Myrrha Linear Accelerator cavity, linac, cryomodule, proton 2718
 
  • D. Vandeplassche
    SCK-CEN, Mol, Belgium
  • J.-L. Biarrotte
    IPN, Orsay, France
  • H. Klein, H. Podlech
    IAP, Frankfurt am Main, Germany
 
  Funding: European Atomic Energy Community's (EURATOM) Seventh Framework Programme FP7/2007-2011, grant agreement no. 269565 (MAX project)
Accelerator Driven Systems (ADS) are promising tools for the efficient transmutation of nuclear waste products in dedicated industrial installations, called transmuters. The Myrrha project at Mol, Belgium, placed itself on the path towards these applications with a multipurpose and versatile system based on a liquid PbBi (LBE) cooled fast reactor (80 MWth) which may be operated in both critical and subcritical modes. In the latter case the core is fed by spallation neutrons obtained from a 600 MeV proton beam hitting the LBE coolant/target. The accelerator providing this beam is a high intensity CW superconducting linac which is laid out for the highest achievable reliability. The combination of a parallel redundant and of a fault tolerant scheme should allow obtaining an MTBF value in excess of 250 hours that is required for optimal integrity and successful operation of the ADS. Myrrha is expected to be operational in 2023. The forthcoming 4-year period is fully dedicated to R&D activities, and in the field of the accelerator they are strongly focused on the reliability aspects and on the proper shaping of the beam trip spectrum.
 
 
THPO008 Klystron and Modulator System for the PEFP 20 MeV Proton Linac klystron, linac, proton, gun 3352
 
  • D.I. Kim, Y.-S. Cho, H.S. Kim, H.-J. Kwon
    KAERI, Daejon, Republic of Korea
 
  Funding: This work is supported by the Ministry of Science and Technology of the Korean government.
A modulator developed for the 100 MeV proton linear accelerator is operating in the 20 MeV proton linac. The voltage and current of the modulator are -105 kV, 50 A with 1.5 ms pulse width, 60 Hz repetition rate. The modulator drives two klystrons simultaneously, one for the RFQ, the other for the DTL. The typical operation parameters of the modulator are 85 kV of the peak voltage, 34 A of the peak current, 1 ms of the pulse width, 4 Hz of the pulse repetition. The specifications of the klystron are 350 MHz of the frequency, 1.1 MW of the maximum average RF power, less than 95 kV of the beam voltage, triode type electron gun with mod-anode. The mod-anode voltage was supplied by the voltage dividing resistors which were located inside the klystron oil tank. In this paper, the operation performance of the klystron and modulator system for the PEFP 20 MeV proton linac is presented.
 
 
THPS016 Rare Ion Beam (RIB) Facility at VECC : Present and Future cavity, ion, ion-source, acceleration 3454
 
  • R.K. Bhandari, A. Bandyopadhyay, A. Chakrabarti, V. Naik
    DAE/VECC, Calcutta, India
 
  Funding: This project if funded by Department of Atomic Energy, Government of India.
An ISOL –post accelerator type Rare Ion Beam (RIB) Facility is being developed at our centre. The RIBs will be produced by using light ion induced fusion evaporation and by using photo-fission reaction, using a 50 MeV 2mA SC electron linac that is being developed in collaboration with TRIUMF, Canada. The primary reaction products will be ionized using two-ion source charge breeder. The possibility of feeding the primary reaction products directly to an ECR ion source using multi-stage skimmer and gas jet transport technique is being explored at present. An extended rod type heavy ion RFQ, one buncher and three IH cavities have been successfully accelerated stable beams up to about 415 keV/u. Three more IH cavities will increase the energy to about 1.3 MeV/u and SC QWRs will augment the energy thereafter. In the next stage of development, an Advanced National Facility for Unstable & Rare Isotope Beams (ANURIB) has been envisaged. This green field project will deliver stable & RIBs from 1.5 keV/u to 100 MeV/u. This will have both ISOL type and PFS type facility. Neutron & positron beams based facilities will also be built around the e- linac.
 
 
THPS059 Thermo-mechanical Design of Particle-stopping Devices at the High Energy Beamline Sections of the IFMIF/EVEDA Accelerator simulation, ion, linac, focusing 3562
 
  • D. Iglesias, F. Arranz, B. Brañas, J.M. Carmona, N. Casal, A. Ibarra, C. Oliver, M. Parro, I. Podadera, D. Rapisarda
    CIEMAT, Madrid, Spain
 
  Funding: Work partially supported by Spanish Ministry of Science and Innovation under project AIC10-A-000441 and ENE2009-11230.
The IFMIF/EVEDA linear accelerator is a 9 MeV, D+ prototype for the validation of the 40 MeV final IFMIF design. The high intensity, 125 mA CW, high power beam (1.125 MW) produces an extremely high thermal load in all the elements intercepting the ions. Independently of the final purpose of each device, if its working conditions imply stopping a non-negligible amount of particles, the associated thermal solicitation greatly determines the design constraints. The present work will summarize a thermo-mechanical design workflow that can be applied to any beam facing element of high current accelerators and its application in beam dump, scrappers and slits design. This approach is based on analysis experiences at the IFMIF/EVEDA project and, while taking into account the particularities of each device, uses the same tools and parameter evaluation criteria for all of them. It has been applied successfully to recent designs, effectively reducing the number of iterations before achieving a valid thermo-mechanical behavior. Results of each design and the concrete advantages of this approach will be detailed.
 
 
THPS060 RAM Methodology and Activities for IFMIF Engineering Design target, neutron, controls, vacuum 3565
 
  • J.M. Arroyo, A. Ibarra, J. Molla
    CIEMAT, Madrid, Spain
  • J. Abal, E. Bargalló, J. Dies, C. Tapia
    UPC, Barcelona, Spain
 
  IFMIF will be an accelerator-based neutron source to test fusion candidate materials. The Engineering Validation and Engineering Design Activities of IFMIF are aimed to deliver the complete engineering design file of this major facility. Achieving a high level of availability and reliability is a key point for IFMIF mission. A goal of 70% of operational availability has been established. In order to fulfill the availability requirements, RAM has to be considered during the engineering design phase. This paper summarizes the methodology developed and the proposed process aimed at including RAM in the design of IFMIF, as well as the activities performed in this framework. Overall RAM specifications have been defined for IFMIF project. RAM methodology dealing with RAM design guidelines, reliability database and RAM modelization has been developed. As a first step for the iterative process of RAM analysis of IFMIF design, a fault tree model based on a new reliability database has been performed with Risk Spectrum®. The result is a first assessment of the availability and first allocation of RAM requirements.  
 
THPS087 Engineering Prototype for a Compact Medical Dielectric Wall Accelerator proton, kicker, laser, acceleration 3636
 
  • A. Zografos, T. Brown, A. Hening, V. Joshkin, K. Leung, Y.K. Parker, H.T. Pearce-Percy, D. Pearson, M. Rougieri, J. Weir
    CPAC, Livermore, CA, USA
  • R. Becker
    SSS, Gelnhausen, Germany
  • D.T. Blackfield, G.J. Caporaso, Y.-J. Chen, S. Falabella, G. Guethlein, S.A. Hawkins, S.D. Nelson, B. R. Poole, J.A. Watson
    LLNL, Livermore, California, USA
  • R.W. Hamm
    R&M Technical Enterprises, Pleasanton, California, USA
 
  Funding: Prepared by LLNL under Contract DE-AC52-07NA27344.
The Compact Particle Accelerator Corporation has developed an architecture to produce pulsed proton bunches that will be suitable for proton treatment of cancers. Subsystems include a RFQ injection system with a pulsed kicker to select the desired proton bunches and a linear accelerator incorporating a High Gradient Insulator with stacked Blumleins to produce the required voltage. The Blumleins are switched with solid state laser driven optical switches that are an integral part of the Blumlein assemblies. Other subsystems include a laser, a fiber optic distribution system, an electrical charging system and beam diagnostics. An engineering prototype has been constructed and it has been fully characterized. Results obtained from the engineering prototype support the development of an extremely compact 150 MeV system capable of modulating energy, beam current and spot size on a shot to shot basis within the next two years. The paper will detail the construction of the engineering prototype and discuss experimental results. In addition, future development milestones and commercialization plans will also be discussed.
 
 
THPS094 New Approaches in High Power RFQ Technology vacuum, linac, resonance, RF-structure 3654
 
  • A. Bechtold, J.M. Maus, G. Ritter
    NTG Neue Technologien GmbH & Co KG, Gelnhausen, Germany
 
  There is a clear tendency for the utilization of continuous wave c.w. high power RFQs in a huge variety of applications like nuclear waste transmutation or material research. They can serve as injectors for the production of secondary particles like neutrons or rare isotopes and can be applied for post acceleration of the latter ones. These RF-structures have to withstand an enormous amount of RF-power dissipated on the surfaces (up to several 10s kW per meter) and the associated thermal load. NTG Company gained lots of experience especially in the field of 4-rod c.w. RFQ design. Most recent developments to handle such high RF-power dissipation shall be reported.