RUPAC2012 - List of Keywords (gun)

Paper	Title	Other Keywords	Page
TUXCH02	New Developments in High Energy Electron Cooling	electron, high-voltage, laser, diagnostics	43
	J. Dietrich DELTA, Dortmund, Germany
	Electron cooling of hadron beams is a powerful technique by which accelerator facilities achieve the necessary beam brightness for their physics research. An overview on the latest developments in high energy electron cooling (electron beam energy higher than 500 KeV) is given. Technical feasibility for electron beam energy up to 8 MeV is discussed.
	Slides TUXCH02 [3.122 MB]

TUACH01	Status of the High Voltage Electron Cooler Project for NICA Collider	electron, solenoid, high-voltage, acceleration	58
	S. Yakovenko, E.V. Ahmanova, A. Ivanov, A.G. Kobets, I.N. Meshkov, A.Yu. Rudakov, A.V. Smirnov, N.D. Topilin JINR, Dubna, Moscow Region, Russia A.V. Shabunov JINR/VBLHEP, Moscow, Russia
	The electron cooling system at electron energy up to 2.5 MeV for the NICA collider is under design at JINR. The magnetic system and system of transfer of capacity on high potential is developed. The high voltage generator prototype on 250 kV was tested. The technical design of the electron cooling system was started.
	Slides TUACH01 [1.035 MB]

THCCH02	Characteristics of the Model of Linear Accelerator Based on Parallel Coupled Accelerating Structure with Beam Loading	electron, beam-loading, cavity, injection	164
	Y.D. Chernousov ICKC, Novosibirsk, Russia A.M. Barnyakov, A.E. Levichev, V.M. Pavlov BINP SB RAS, Novosibirsk, Russia V. Ivannikov, I.V. Shebolaev ICKC SB RAS, Novosibirsk, Russia
	The 5-cavity model of linear accelerator based on the parallel coupled accelerating structure (LAPCAS) is under study. Linear accelerator is equipped with focusing system based on permanent magnet and three-electrode gun with RF control. The work of accelerator with electron beam is demonstrated. The parameters of short pulses mode are following: electron energy - 4 MeV, pulse current - 0.3 A, pulse duration - 2.5 ns; the parameters of long pulses mode are following: energy - 2.5 MeV, pulse current - 0. 1A, pulse duration - 0.1 - 4 us. Working frequency of the accelerator is 2.45 GHz. In RF-controlled mode the capture of about 100% is demonstrated. The beam loading effect is observed. The compensation of energy spread of accelerated electrons by delaying the moment of injection in the LAPCAS is demonstrated. The equations of transient process in the accelerating cavity which is powered by an external RF generator and excited by electron bunches in a simple form are presented.
	Slides THCCH02 [1.154 MB]

TUPPB005	LEPTA Project: Towards Positronium	positron, electron, focusing, injection	316
	A.G. Kobets, E.V. Ahmanova, V.I. Lokhmatov, I.N. Meshkov, V. Pavlov, A.Yu. Rudakov, A.A. Sidorin, S. Yakovenko JINR, Dubna, Moscow Region, Russia M.K. Eseev NAFU, Arkhangelsk, Russia
	The project of the Low Energy Positron Toroidal Accumulator (LEPTA) is under development at JINR. The LEPTA facility is a small positron storage ring equipped with the electron coolin system. The project positron energy is of 2 – 10 keV. The main goal of the facility is to generate an intense flux of positronium atoms – the bound state of electron and positron. Storage ring of LEPTA facility was commissioned in September 2004 and was under development up to now. The positron injector has been constructed in 2005 - 2010, and beam transfer channel – in 2011. By the end of August 2011 experiments on electron and positron injection into the ring have been started. The recent results are presented here.

TUPPB034	Low Energy Cooler for NICA Booster	electron, ion, booster, cathode	391
	A.V. Bubley, M.I. Bryzgunov, V.M. Panasyuk, V.V. Parkhomchuk, V.B. Reva BINP SB RAS, Novosibirsk, Russia
	Low energy cooler for NICA project is being currently designed at BINP in collaboration with JINR. From the point of view of its features it is similar to previous low energy coolers manufactured at BINP, i.e. equipped with variable electron beam, electrostatic bending, high precision solenoid etc. The article describes some technical solutions applied to the cooler design.

TUPPB043	Program Complex for Vacuum Nanoelectronics Finite Element Simulations	electron, simulation, cathode, vacuum	409
	K.A. Nikiforov, N.V. Egorov St. Petersburg State University, St. Petersburg, Russia
	The program complex in MATLAB intended for vacuum nanoelectronics simulations is described. Physical and mathematical models, computational methods and algorithms of program complex are presented. Electrostatic simulation of electron transport processes is discussed under electron massless approximation; current function method and Matlab PDE Toolbox finite element solutions are used. Developed program complex is able to simulate diode and triode structures with complicated submicron geometry, current-voltage characteristics, calculate electric field distribution, estimate electric line interaction. The modelling results by the example of two different triode structures are presented. Matlab stand-alone application with graphical user interface for demonstration purposes is presented.

TUPPB049	First Test Results of RF Gun for the Race-track Microtron Recuperator of BINP SB RAS	cavity, vacuum, electron, microtron	424
	V. Volkov, V.S. Arbuzov, E.I. Gorniker, E.I. Kolobanov, S.A. Krutikhin, I.V. Kuptsov, G.Y. Kurkin, V.N. Osipov, V.M. Petrov, A.M. Pilan, M.A. Scheglov, I.K. Sedlyarov, N. Vinokurov BINP SB RAS, Novosibirsk, Russia
	A new electron source for the Race-Track Microtron Recuperator is being developed by BINP SB RAS. It will increase average beam current and brightness of synchrotron radiation. Instead of the static 300kV electron gun operated now we are developing RF gun with the same energy of electrons. This RF gun consists of RF cavity with a gridded thermo cathode mounted on the back wall. RF cavity is driven by a 60 kW generator with last stage equipped by GU101A tetrode tube. Operational frequency of the cavity is 90.2 MHz. It is equal to the second subharmonic of the Microtron RF system frequency. A set of low power electronics controls amplitude of the cavity voltage and its tuner. This system, including a diagnostics beam line, has been installed to serve as a test bench to test the RF cavity and for beam dynamics studies. In continuous regime the designed 300 kV voltages at the acceleration gap is obtained. This paper summarizes the first test results of the cavity in this configuration.

TUPPB058	Improving Efficiency of Plasma Generation in H⁻ Ion Source with Saddle Antenna	plasma, ion, ion-source, electron	439
	V.G. Dudnikov, R.P. Johnson Muons, Inc, Batavia, USA S.N. Murray, T.R. Pennisi, M.F. Piller, M. Santana, M.P. Stockli, R.F. Welton ORNL, Oak Ridge, Tennessee, USA
	Funding: Work supported in part by US DOE Contract DE-AC05-00OR22725 and by STTR grant DE-SC0002690. Progress in development of RF ion source with saddle radio frequency (SA) (RF) antenna which will provide better power efficiency for high pulsed and average current, higher brightness with longer lifetime and higher reliability is considered. Several versions of new plasma generators with different antennas and magnetic field configurations were tested in the Test Stand. The efficiency of positive ion plasma generation has been improved ~4x times up to 0.18 A/cm² per 1 kW of RF power 13.56 MHz. A new version of the RF assisted triggering plasma source (TPS) has been designed, fabricated and tested. A Saddle antenna SPS with water cooling is being fabricated for high duty factor have been tested.

WEPPC028	High Voltage Terminal in COSY Electron Cooler	controls, high-voltage, power-supply, electron	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.

WEPPC048	Status of 1 MeV 25 kW CW Electron Accelerator	electron, klystron, vacuum, high-voltage	541
	D.S. Yurov MSU SINP, Moscow, Russia A.S. Alimov, B.S. Ishkanov, N.I. Pakhomov, V.P. Sakharov, V.I. Shvedunov MSU, Moscow, Russia
	Status of 1 MeV 25 kW continuous wave (CW) linear electron accelerator for radiation technologies which is under construction at SINP MSU is described. Driven by 50 kW CW klystron on-axis coupled standing wave accelerating structure was optimized, manufactured and tuned. The results of accelerating structure measurements and tuning are presented. RF system, high voltage, vacuum and control systems of the accelerator are described. New magnetic system forming output beam irradiation field is also described.

WEPPC059	Electron Beam Image Visual Monitoring	electron, monitoring, target, linac	563
	V.N. Boriskin, I.A. Chertishchev, N.G. Reshetnyak, K. Romanovsky, V.A. Shevchenko, I.N. Shlyakhov, A.Eh. Tenishev, V.L. Uvarov, V. Zakutin NSC/KIPT, Kharkov, Ukraine
	The system for visual monitoring of the electron beam features was developed and implemented. This system is based on registration of optical radiation, which is generated under object-beam interaction. The system comprises image transferring channel, remote-controlled digital photo-camera, connected with PC by USB-interface as well as proper software. The images obtained give information on the beam density distribution over the surface of the object being irradiated. 100 KeV and 10 MeV electron beams was researched.

WEPPD028	Beam Position Monitor System for 2 MeV Electron Cooler for COSY	electron, proton, controls, 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.

WEPPD033	The System for Control of an Electron Beam Welding Machines	controls, power-supply, cathode, high-voltage	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	controls, radiation, 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.

WEPPD060	Distributed Control System for an Industrial Electron Beam Accelerator	controls, electron, vacuum, high-voltage	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.

Paper

Title

Other Keywords

Page

TUXCH02

New Developments in High Energy Electron Cooling

electron, high-voltage, laser, diagnostics

43

J. Dietrich
DELTA, Dortmund, Germany

Electron cooling of hadron beams is a powerful technique by which accelerator facilities achieve the necessary beam brightness for their physics research. An overview on the latest developments in high energy electron cooling (electron beam energy higher than 500 KeV) is given. Technical feasibility for electron beam energy up to 8 MeV is discussed.

Slides TUXCH02 [3.122 MB]

TUACH01

Status of the High Voltage Electron Cooler Project for NICA Collider

electron, solenoid, high-voltage, acceleration

58

S. Yakovenko, E.V. Ahmanova, A. Ivanov, A.G. Kobets, I.N. Meshkov, A.Yu. Rudakov, A.V. Smirnov, N.D. Topilin
JINR, Dubna, Moscow Region, Russia
A.V. Shabunov
JINR/VBLHEP, Moscow, Russia

The electron cooling system at electron energy up to 2.5 MeV for the NICA collider is under design at JINR. The magnetic system and system of transfer of capacity on high potential is developed. The high voltage generator prototype on 250 kV was tested. The technical design of the electron cooling system was started.

Slides TUACH01 [1.035 MB]

THCCH02

Characteristics of the Model of Linear Accelerator Based on Parallel Coupled Accelerating Structure with Beam Loading

electron, beam-loading, cavity, injection

164

Y.D. Chernousov
ICKC, Novosibirsk, Russia
A.M. Barnyakov, A.E. Levichev, V.M. Pavlov
BINP SB RAS, Novosibirsk, Russia
V. Ivannikov, I.V. Shebolaev
ICKC SB RAS, Novosibirsk, Russia

The 5-cavity model of linear accelerator based on the parallel coupled accelerating structure (LAPCAS) is under study. Linear accelerator is equipped with focusing system based on permanent magnet and three-electrode gun with RF control. The work of accelerator with electron beam is demonstrated. The parameters of short pulses mode are following: electron energy - 4 MeV, pulse current - 0.3 A, pulse duration - 2.5 ns; the parameters of long pulses mode are following: energy - 2.5 MeV, pulse current - 0. 1A, pulse duration - 0.1 - 4 us. Working frequency of the accelerator is 2.45 GHz. In RF-controlled mode the capture of about 100% is demonstrated. The beam loading effect is observed. The compensation of energy spread of accelerated electrons by delaying the moment of injection in the LAPCAS is demonstrated. The equations of transient process in the accelerating cavity which is powered by an external RF generator and excited by electron bunches in a simple form are presented.

Slides THCCH02 [1.154 MB]

TUPPB005

LEPTA Project: Towards Positronium

positron, electron, focusing, injection

316

A.G. Kobets, E.V. Ahmanova, V.I. Lokhmatov, I.N. Meshkov, V. Pavlov, A.Yu. Rudakov, A.A. Sidorin, S. Yakovenko
JINR, Dubna, Moscow Region, Russia
M.K. Eseev
NAFU, Arkhangelsk, Russia

The project of the Low Energy Positron Toroidal Accumulator (LEPTA) is under development at JINR. The LEPTA facility is a small positron storage ring equipped with the electron coolin system. The project positron energy is of 2 – 10 keV. The main goal of the facility is to generate an intense flux of positronium atoms – the bound state of electron and positron. Storage ring of LEPTA facility was commissioned in September 2004 and was under development up to now. The positron injector has been constructed in 2005 - 2010, and beam transfer channel – in 2011. By the end of August 2011 experiments on electron and positron injection into the ring have been started. The recent results are presented here.

TUPPB034

Low Energy Cooler for NICA Booster

electron, ion, booster, cathode

391

A.V. Bubley, M.I. Bryzgunov, V.M. Panasyuk, V.V. Parkhomchuk, V.B. Reva
BINP SB RAS, Novosibirsk, Russia

Low energy cooler for NICA project is being currently designed at BINP in collaboration with JINR. From the point of view of its features it is similar to previous low energy coolers manufactured at BINP, i.e. equipped with variable electron beam, electrostatic bending, high precision solenoid etc. The article describes some technical solutions applied to the cooler design.

TUPPB043

Program Complex for Vacuum Nanoelectronics Finite Element Simulations

electron, simulation, cathode, vacuum

409

K.A. Nikiforov, N.V. Egorov
St. Petersburg State University, St. Petersburg, Russia

The program complex in MATLAB intended for vacuum nanoelectronics simulations is described. Physical and mathematical models, computational methods and algorithms of program complex are presented. Electrostatic simulation of electron transport processes is discussed under electron massless approximation; current function method and Matlab PDE Toolbox finite element solutions are used. Developed program complex is able to simulate diode and triode structures with complicated submicron geometry, current-voltage characteristics, calculate electric field distribution, estimate electric line interaction. The modelling results by the example of two different triode structures are presented. Matlab stand-alone application with graphical user interface for demonstration purposes is presented.

TUPPB049

First Test Results of RF Gun for the Race-track Microtron Recuperator of BINP SB RAS

cavity, vacuum, electron, microtron

424

V. Volkov, V.S. Arbuzov, E.I. Gorniker, E.I. Kolobanov, S.A. Krutikhin, I.V. Kuptsov, G.Y. Kurkin, V.N. Osipov, V.M. Petrov, A.M. Pilan, M.A. Scheglov, I.K. Sedlyarov, N. Vinokurov
BINP SB RAS, Novosibirsk, Russia

A new electron source for the Race-Track Microtron Recuperator is being developed by BINP SB RAS. It will increase average beam current and brightness of synchrotron radiation. Instead of the static 300kV electron gun operated now we are developing RF gun with the same energy of electrons. This RF gun consists of RF cavity with a gridded thermo cathode mounted on the back wall. RF cavity is driven by a 60 kW generator with last stage equipped by GU101A tetrode tube. Operational frequency of the cavity is 90.2 MHz. It is equal to the second subharmonic of the Microtron RF system frequency. A set of low power electronics controls amplitude of the cavity voltage and its tuner. This system, including a diagnostics beam line, has been installed to serve as a test bench to test the RF cavity and for beam dynamics studies. In continuous regime the designed 300 kV voltages at the acceleration gap is obtained. This paper summarizes the first test results of the cavity in this configuration.

TUPPB058

Improving Efficiency of Plasma Generation in H⁻ Ion Source with Saddle Antenna

plasma, ion, ion-source, electron

439

V.G. Dudnikov, R.P. Johnson
Muons, Inc, Batavia, USA
S.N. Murray, T.R. Pennisi, M.F. Piller, M. Santana, M.P. Stockli, R.F. Welton
ORNL, Oak Ridge, Tennessee, USA

Funding: Work supported in part by US DOE Contract DE-AC05-00OR22725 and by STTR grant DE-SC0002690.
Progress in development of RF ion source with saddle radio frequency (SA) (RF) antenna which will provide better power efficiency for high pulsed and average current, higher brightness with longer lifetime and higher reliability is considered. Several versions of new plasma generators with different antennas and magnetic field configurations were tested in the Test Stand. The efficiency of positive ion plasma generation has been improved ~4x times up to 0.18 A/cm² per 1 kW of RF power 13.56 MHz. A new version of the RF assisted triggering plasma source (TPS) has been designed, fabricated and tested. A Saddle antenna SPS with water cooling is being fabricated for high duty factor have been tested.

WEPPC028

High Voltage Terminal in COSY Electron Cooler

controls, high-voltage, power-supply, electron

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.

WEPPC048

Status of 1 MeV 25 kW CW Electron Accelerator

electron, klystron, vacuum, high-voltage

541

D.S. Yurov
MSU SINP, Moscow, Russia
A.S. Alimov, B.S. Ishkanov, N.I. Pakhomov, V.P. Sakharov, V.I. Shvedunov
MSU, Moscow, Russia

Status of 1 MeV 25 kW continuous wave (CW) linear electron accelerator for radiation technologies which is under construction at SINP MSU is described. Driven by 50 kW CW klystron on-axis coupled standing wave accelerating structure was optimized, manufactured and tuned. The results of accelerating structure measurements and tuning are presented. RF system, high voltage, vacuum and control systems of the accelerator are described. New magnetic system forming output beam irradiation field is also described.

WEPPC059

Electron Beam Image Visual Monitoring

electron, monitoring, target, linac

563

V.N. Boriskin, I.A. Chertishchev, N.G. Reshetnyak, K. Romanovsky, V.A. Shevchenko, I.N. Shlyakhov, A.Eh. Tenishev, V.L. Uvarov, V. Zakutin
NSC/KIPT, Kharkov, Ukraine

The system for visual monitoring of the electron beam features was developed and implemented. This system is based on registration of optical radiation, which is generated under object-beam interaction. The system comprises image transferring channel, remote-controlled digital photo-camera, connected with PC by USB-interface as well as proper software. The images obtained give information on the beam density distribution over the surface of the object being irradiated. 100 KeV and 10 MeV electron beams was researched.

WEPPD028

Beam Position Monitor System for 2 MeV Electron Cooler for COSY

electron, proton, controls, 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.

WEPPD033

The System for Control of an Electron Beam Welding Machines

controls, power-supply, cathode, high-voltage

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

controls, radiation, 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.

WEPPD060

Distributed Control System for an Industrial Electron Beam Accelerator

controls, electron, vacuum, high-voltage

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.