RUPAC2012 - List of Authors (Kozak, V.R.)

Paper

Title

Page

Budker INP Free Electron Laser Facility – Current Status and Future Prospects

136

O.A. Shevchenko, V.S. Arbuzov, K.N. Chernov, E.N. Dementyev, B.A. Dovzhenko, Ya.V. Getmanov, E.I. Gorniker, B.A. Knyazev, E.I. Kolobanov, A.A. Kondakov, V.R. Kozak, E.V. Kozyrev, V.V. Kubarev, G.N. Kulipanov, E.A. Kuper, I.V. Kuptsov, G.Y. Kurkin, L.E. Medvedev, L.A. Mironenko, V.K. Ovchar, B.Z. Persov, A.M. Pilan, V.M. Popik, V.V. Repkov, T.V. Salikova, M.A. Scheglov, I.K. Sedlyarov, G.V. Serdobintsev, S.S. Serednyakov, A.N. Skrinsky, S.V. Tararyshkin, V.G. Tcheskidov, N. Vinokurov, M.G. Vlasenko, P. Vobly, V. Volkov
BINP SB RAS, Novosibirsk, Russia

The free electron laser (FEL) facility at Budker INP is being developed for more than 15 years. It is based on the normal conducting CW energy recovery linac (ERL) with rather complicated magnetic system lattice. Up to now it is the only one in the world multiorbit ERL. It can operate in three different regimes providing electron beam for three different FELs. Its commissioning was naturally divided in three stages. The first stage ERL includes only one orbit placed in vertical plane. It serves as electron beam source for terahertz FEL which started working for users in 2003. Radiation of this FEL is used by several groups of scientists including biologists, chemists and physicists. Its high peak and average powers are utilized in experiments on material ablation and biological objects modification. The second stage ERL is composed of two orbits located in horizontal plane. The second stage FEL is installed on the bypass of the second orbit. The first lasing of this FEL was achieved in 2009. The last stage ERL will include four orbits. Its commissioning is in progress now. In this paper we report the latest results obtained from the operating FELs as well as our progress with the commissioning of the two remaining ERL beamlines. We also discuss possible options for the future upgrade.

Slides THXCH04 [5.360 MB]

TUPPB050

The System of Power Supplies, Control and Modulation of Electron Gun for 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.

WEPPC023

Bypass Modules for Solenoid Shunting of 2MeV Electron Cooler for COSY

O.V. Belikov, V.V. Kolmogorov, M.N. Kondaurov, V.R. Kozak, A.S. Medvedko, V.M. Panasyuk, V.B. Reva
BINP SB RAS, Novosibirsk, Russia

Beam focusing correction of electron cooler for COSY is realized with a partial current intake from solenoid's winding using special shunts. Maximal shunting current is 20 A with a voltage drop on solenoid's coil in a range of 15-30 V. The dispersion of shunting current is 100 ppm for 10 hour operation. Energy taken from solenoid's winding recuperates to 100-240 VAC, 50/60 Hz line.

WEPPC028

High Voltage Terminal in COSY Electron Cooler

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.

WEPPC029

Precision Current Source VCH500-15

V.F. Veremeenko, V.R. Kozak
BINP SB RAS, Novosibirsk, Russia

The current Source VCH500-15 is intended for feeding electromagnets in acceleratos, requiring high stability and low-level ripples of the output direct current. The Source has a following main parameters: an output current controlled from zero before 500 A, output voltage from zero before 15 V, instability of the current for 8 hours of the unceasing work not more than 0,01% from nominal importance of the current, output voltage ripples in band of the frequencies 0-300 Hz not more 10 mV RMS, in band 0-40 kHz - not more 300 mV RMS, - a cooling of the Source water - a sizes of the Source 547*550*133 mm, weight 25 kg.

WEPPC032

The Power Supply System for the Accelerating Column of the 2 MeV Electron Cooler for COSY

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.

Paper	Title	Page
THXCH04	Budker INP Free Electron Laser Facility – Current Status and Future Prospects	136
	O.A. Shevchenko, V.S. Arbuzov, K.N. Chernov, E.N. Dementyev, B.A. Dovzhenko, Ya.V. Getmanov, E.I. Gorniker, B.A. Knyazev, E.I. Kolobanov, A.A. Kondakov, V.R. Kozak, E.V. Kozyrev, V.V. Kubarev, G.N. Kulipanov, E.A. Kuper, I.V. Kuptsov, G.Y. Kurkin, L.E. Medvedev, L.A. Mironenko, V.K. Ovchar, B.Z. Persov, A.M. Pilan, V.M. Popik, V.V. Repkov, T.V. Salikova, M.A. Scheglov, I.K. Sedlyarov, G.V. Serdobintsev, S.S. Serednyakov, A.N. Skrinsky, S.V. Tararyshkin, V.G. Tcheskidov, N. Vinokurov, M.G. Vlasenko, P. Vobly, V. Volkov BINP SB RAS, Novosibirsk, Russia
	The free electron laser (FEL) facility at Budker INP is being developed for more than 15 years. It is based on the normal conducting CW energy recovery linac (ERL) with rather complicated magnetic system lattice. Up to now it is the only one in the world multiorbit ERL. It can operate in three different regimes providing electron beam for three different FELs. Its commissioning was naturally divided in three stages. The first stage ERL includes only one orbit placed in vertical plane. It serves as electron beam source for terahertz FEL which started working for users in 2003. Radiation of this FEL is used by several groups of scientists including biologists, chemists and physicists. Its high peak and average powers are utilized in experiments on material ablation and biological objects modification. The second stage ERL is composed of two orbits located in horizontal plane. The second stage FEL is installed on the bypass of the second orbit. The first lasing of this FEL was achieved in 2009. The last stage ERL will include four orbits. Its commissioning is in progress now. In this paper we report the latest results obtained from the operating FELs as well as our progress with the commissioning of the two remaining ERL beamlines. We also discuss possible options for the future upgrade.
	Slides THXCH04 [5.360 MB]

TUPPB050	The System of Power Supplies, Control and Modulation of Electron Gun for 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.

WEPPC023	Bypass Modules for Solenoid Shunting of 2MeV Electron Cooler for COSY
	O.V. Belikov, V.V. Kolmogorov, M.N. Kondaurov, V.R. Kozak, A.S. Medvedko, V.M. Panasyuk, V.B. Reva BINP SB RAS, Novosibirsk, Russia
	Beam focusing correction of electron cooler for COSY is realized with a partial current intake from solenoid's winding using special shunts. Maximal shunting current is 20 A with a voltage drop on solenoid's coil in a range of 15-30 V. The dispersion of shunting current is 100 ppm for 10 hour operation. Energy taken from solenoid's winding recuperates to 100-240 VAC, 50/60 Hz line.

WEPPC028	High Voltage Terminal in COSY Electron Cooler	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.

WEPPC029	Precision Current Source VCH500-15
	V.F. Veremeenko, V.R. Kozak BINP SB RAS, Novosibirsk, Russia
	The current Source VCH500-15 is intended for feeding electromagnets in acceleratos, requiring high stability and low-level ripples of the output direct current. The Source has a following main parameters: an output current controlled from zero before 500 A, output voltage from zero before 15 V, instability of the current for 8 hours of the unceasing work not more than 0,01% from nominal importance of the current, output voltage ripples in band of the frequencies 0-300 Hz not more 10 mV RMS, in band 0-40 kHz - not more 300 mV RMS, - a cooling of the Source water - a sizes of the Source 547550133 mm, weight 25 kg.

WEPPC032	The Power Supply System for the Accelerating Column of the 2 MeV Electron Cooler for COSY	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.