RuPAC2016 - List of Keywords (laser)

Paper	Title	Other Keywords	Page
TUXMH02	Novosibirsk Free Electron Laser: Terahertz and Infrared Coherent Radiation Source	FEL, electron, radiation, undulator	16
	N.A. Vinokurov, V.S. Arbuzov, K.N. Chernov, I.V. Davidyuk, O.I. Deichuli, E.N. Dementyev, B.A. Dovzhenko, Ya.V. Getmanov, Ya.I. Gorbachev, B.A. Knyazev, E.I. Kolobanov, A.A. Kondakov, V.R. Kozak, E.V. Kozyrev, S.A. Krutikhin, V.V. Kubarev, G.N. Kulipanov, E.A. Kuper, I.V. Kuptsov, G.Y. Kurkin, L.E. Medvedev, S.V. Motygin, V.N. Osipov, V.K. Ovchar, V.M. Petrov, A.M. Pilan, V.M. Popik, V.V. Repkov, T.V. Salikova, M.A. Scheglov, I.K. Sedlyarov, S.S. Serednyakov, O.A. Shevchenko, A.N. Skrinsky, S.V. Tararyshkin, V.G. Tcheskidov, A.G. Tribendis, P. Vobly, V. Volkov BINP SB RAS, Novosibirsk, Russia I.V. Davidyuk, Ya.V. Getmanov, B.A. Knyazev, E.V. Kozyrev, S.S. Serednyakov, N.A. Vinokurov NSU, Novosibirsk, Russia A.G. Tribendis NSTU, Novosibirsk, Russia
	Funding: This work was supported by Russian Science Foundation (project N 14-50-00080). High-power free electron laser (FEL) facility NovoFEL has been created at Budker INP. Its wavelength can be tuned over a wide range in terahertz and infrared spectrum regions. As a source of electron bunches this FEL uses multi-turn energy recovery linac which has five straight sections. Three sections are used for three FELs which operate in different wavelength ranges (the first one - 90-240 microns, the second - 37-80 microns and the third - 5-20 microns). The first and the second FELs were commissioned in 2003 and 2009 respectively. They operate for users now. The third FEL is installed on forth accelerator track which is the last one and electron energy is maximal here. It comprises three undulator sections and 40 m optical cavity. The first lasing of this FEL was obtained in summer, 2015. The radiation wavelength was 9 microns and average power was about 100 watts. The designed power is 1 kilowatt at repetition rate 3.75 MHz. Radiation of third FEL has been delivered to user stations recently. The third FEL commissioning results as well as current status of the first and second FELs and future development prospects are presented.
	Slides TUXMH02 [26.379 MB]
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THCBSH04	The Monitoring of the Effects of Earth Surface Inclination With the Precision Laser Inclinometer for High Luminosity Colliders	luminosity, monitoring, collider, optics	210
	B. Di Girolamo, J. Gayde, D. Mergelkuhl, M. Schaumann, J. Wenninger CERN, Geneva, Switzerland N.S. Azaryan, Ju. Boudagov, V.V. Glagolev, M.V. Lyablin, G. Shirkov JINR, Dubna, Moscow Region, Russia G.V. Trubnikov JINR/VBLHEP, Dubna, Moscow region, Russia
	Earth surface movements, like earthquakes or industrial noise, can induce a degradation of particle accelerator instantaneous luminosity or even sudden beam losses. This report introduces the HL-LHC project and discusses the importance of monitoring the effects of earthquakes on the present LHC beam orbit and luminosity using a novel instrument, the Precision Laser Inclinometer (PLI). After a brief description of the instrument principles, a comparison of data from the PLI and from the LHC beam instrumentation in the event of earthquakes is given. The aim is to characterize the response of the accelerator to remote or nearby Earth surface movements. The first results from simulation in comparison with data are presented. The impact of vibrations on high luminosity small-sized beam colliders, as in High Luminosity LHC among many other future projects, the possible applications of the PLI instrument and ideas about possible feedback systems conclude the contribution.
	Slides THCBSH04 [13.317 MB]
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TUPSA012	Superconducting Stored Energy RF Linac as Free Electron Laser Driver	cavity, electron, FEL, linac	237
	V.G. Kurakin, P.V. Kurakin LPI, Moscow, Russia
	Due to cavity losses in multi pass free electron laser (FEL), generation starts in it from definite threshold of driving electron beam current. Depending on generation wave range the threshold current strikes from fraction of ampere to dozens of amperes. In order to rich laser saturation, from hundreds to thousands electron bunches are required. Simple estimations give the value from units up to tens joules of bunches train energy in order to rich FEL saturation for infrared wave range (approximately 20 - 25 MeV of bunches energy and 3 A of pick current, bunch length being 1 cm). A beam with parameters mentioned might be obtained in rf superconducting linac operating in stored energy mode. The advantage of such approach is simplified linac power supply since dozens watts cw rf generator is required only to rich necessary accelerating voltage. At the same time the energy spread arising from beam loading may be compensated by additional cavities exited at shifted frequencies. In this paper Maxwell equations are used for beam-cavity interaction analysis. The bunch energy loss or the same the voltage induced by radiating bunch is expressed in terms of cavity external parameters. The detailed analysis of beam energy spread compensation is carried out followed by an example showing the reality of FEL schema suggested.
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WEPSB039	New Techniques for Operation and Diagnostics of Relativistic Electron Coolers	electron, photon, solenoid, scattering	449
	J. Dietrich, M.W. Bruker, A. Hofmann, E. Riehn, T. Weilbach HIM, Mainz, Germany K. Aulenbacher, W. Klag IKP, Mainz, Germany M.I. Bryzgunov, V.V. Parkhomchuk, V.B. Reva BINP SB RAS, Novosibirsk, Russia
	The Helmholtz Institut Mainz (HIM) performs experiments related to possible improvements of high-energy d.c.-electron coolers. Results and activities concerning non-invasive beam diagnostics and beam control at large operating currents will be shown. Furthermore, progress of our project to use turbo generators as a means for potential-free power generation in high-energy electron coolers is presented.
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WEPSB056	Study of Oil Wells With the Use of Accelerator Tubes, Time and Energy Spectrometers of Neutrons and Gamma Rays in a Single Geophysical Complex	neutron, radiation, plasma, vacuum	490
	A.E. Shikanov, B.Y. Bogdanovich, A.V. Il'inskiy, A.A. Isaev, K.I. Kozlovskiy, A. Nesterovich, E.D. Vovchenko MEPhI, Moscow, Russia
	The report discusses the finding of the coefficient of oil saturation of the reservoir by of nuclear methods. For this purpose, the data about pulse and the activation neutron logging and spectral logging of natural gamma activity are used in a single geophysical complex. As sources of neutron radiation can been applied accelerating tube (AT) based on different ion sources, such as plasma discharge with oscillating electrons (gas AT), vacuum arc and laser-plasma (vacuum AT). For investigation of the oil reservoir, in particular with heavy oil, we discuss the prospects of using vacuum accelerating tube based on a laser-plasma source of deuterons with coaxial acceleration geometry and pulsed magnetic isolation of electrons.
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WEPSB074	High Current Pulsing Deuteron Accelerator with Energy of 500 keV	neutron, plasma, experiment, cathode	527
	A.A. Isaev, K.I. Kozlovskiy, A.E. Shikanov, E.D. Vovchenko MEPhI, Moscow, Russia
	It is reported on the development of a compact experimental model of the deuteron accelerator with energies up to 400 KeV. The ion current is about 1 kA and the current density is greater than 20 A/cm² in pulses with a duration of 0.5 mks and a repetition rate of 1 Hz. In this accelerator, we applied the effective ion source of laser-plasma and the optimized method of magnetic insulation of the electrons in the accelerating gap.
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THPSC022	High-Voltage Power Supply for GOG-1001	controls, monitoring, high-voltage, power-supply	587
	V. Dokutovich, A.D. Chernyakin, D.V. Senkov BINP SB RAS, Novosibirsk, Russia
	At this time BINP are working on material research for the ITER project. The spatial inhomogeneity of deformation is the scope of this study. An optical pattern generator GOG-1001 that increases the energy of monochromatic light source is used in such experiments. GOG-1001 is powered by a high-voltage quasi-momentum PS that feeds energy stored in a capacitor bank to the generator's pump tube. A pulsed voltage source driven by FPGA controller module has been developed. The module controls correct bank charge, monitors tube's current and voltage as well as calculates the energy supplied to the bank and activates the generator. A hardware bank overcharge protection prevents the pump tube from failure. The developed source has two control modes; remote - workstation and manual - front panel. The source control logic is based on FPGA while communication and date computing is processed by a digital processor and a graphic display. High-Voltage Power Supply, laser power,
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THPSC025	Generator of High-Voltage Pulse for High-Current Accelerator of Deuteron With Laser Starts	plasma, high-voltage, cathode, electron	594
	E.D. Vovchenko, A.A. Isaev, K.I. Kozlovskiy, A.E. Shikanov MEPhI, Moscow, Russia
	The report deals with the source of pulsed high voltage, and simultaneously, source of the pulsed current for the magnetic insulation of electrons near the cathode that was developed for a high-current accelerator of deuterons with laser-plasma anode. The accelerating voltage up to 400 kV and ion current about 1 kA have been achieved. The current in the spiral inductor has reached 4 kA and it excludes breakdown between the cathode and anode for 0.5 mks. For synchronization of physical processes in accelerator of deuterons with pulsed power, the laser control is applied.
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THPSC047	A Faraday Cup for a Low Charge LWFA Electron Beam Measurement	electron, simulation, acceleration, plasma	635
	V. Gubin, V.I. Trunov Institute of Laser Physics, SB RAS, Novosibirsk, Russia V.V. Gambaryan, A.E. Levichev, Yu. Maltseva, P.V. Martyshkin, A.A. Pachkov, S.N. Peshekhonov BINP SB RAS, Novosibirsk, Russia
	Nowadays laser wakefield acceleration (LWFA) is considered as one a perspective method for GeV electron beam production. Combination of laser accelerated electrons and Compton backscattering of probe light beam opens possibility to create the table top source of femtosecond light beam in x-ray and gamma range. Project of laser-driven Compton light source started in ILP SB RAS in collaboration with BINP SB RAS. Production of 1-10 pC electron beams sub-ps time range duration with energies up to 100 MeV is expected as a result of the first stage of the project. Since energy of electrons does not exceed of 100 MeV, it allows using Faraday cup (FC) with reasonable dimensions, instead of commonly used integrating current transformer (ICT). Geometry of FC was optimized taking into account of beam stopping simulation as well as low capacity requirement. RF properties, simulation of the system operation were carried out. System has been tested at the VEPP-5 electron linac. Results of development and testing of this FC are presented.
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Paper

Title

Other Keywords

Page

TUXMH02

Novosibirsk Free Electron Laser: Terahertz and Infrared Coherent Radiation Source

FEL, electron, radiation, undulator

16

N.A. Vinokurov, V.S. Arbuzov, K.N. Chernov, I.V. Davidyuk, O.I. Deichuli, E.N. Dementyev, B.A. Dovzhenko, Ya.V. Getmanov, Ya.I. Gorbachev, B.A. Knyazev, E.I. Kolobanov, A.A. Kondakov, V.R. Kozak, E.V. Kozyrev, S.A. Krutikhin, V.V. Kubarev, G.N. Kulipanov, E.A. Kuper, I.V. Kuptsov, G.Y. Kurkin, L.E. Medvedev, S.V. Motygin, V.N. Osipov, V.K. Ovchar, V.M. Petrov, A.M. Pilan, V.M. Popik, V.V. Repkov, T.V. Salikova, M.A. Scheglov, I.K. Sedlyarov, S.S. Serednyakov, O.A. Shevchenko, A.N. Skrinsky, S.V. Tararyshkin, V.G. Tcheskidov, A.G. Tribendis, P. Vobly, V. Volkov
BINP SB RAS, Novosibirsk, Russia
I.V. Davidyuk, Ya.V. Getmanov, B.A. Knyazev, E.V. Kozyrev, S.S. Serednyakov, N.A. Vinokurov
NSU, Novosibirsk, Russia
A.G. Tribendis
NSTU, Novosibirsk, Russia

Funding: This work was supported by Russian Science Foundation (project N 14-50-00080).
High-power free electron laser (FEL) facility NovoFEL has been created at Budker INP. Its wavelength can be tuned over a wide range in terahertz and infrared spectrum regions. As a source of electron bunches this FEL uses multi-turn energy recovery linac which has five straight sections. Three sections are used for three FELs which operate in different wavelength ranges (the first one - 90-240 microns, the second - 37-80 microns and the third - 5-20 microns). The first and the second FELs were commissioned in 2003 and 2009 respectively. They operate for users now. The third FEL is installed on forth accelerator track which is the last one and electron energy is maximal here. It comprises three undulator sections and 40 m optical cavity. The first lasing of this FEL was obtained in summer, 2015. The radiation wavelength was 9 microns and average power was about 100 watts. The designed power is 1 kilowatt at repetition rate 3.75 MHz. Radiation of third FEL has been delivered to user stations recently. The third FEL commissioning results as well as current status of the first and second FELs and future development prospects are presented.

Slides TUXMH02 [26.379 MB]

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THCBSH04

The Monitoring of the Effects of Earth Surface Inclination With the Precision Laser Inclinometer for High Luminosity Colliders

luminosity, monitoring, collider, optics

210

B. Di Girolamo, J. Gayde, D. Mergelkuhl, M. Schaumann, J. Wenninger
CERN, Geneva, Switzerland
N.S. Azaryan, Ju. Boudagov, V.V. Glagolev, M.V. Lyablin, G. Shirkov
JINR, Dubna, Moscow Region, Russia
G.V. Trubnikov
JINR/VBLHEP, Dubna, Moscow region, Russia

Earth surface movements, like earthquakes or industrial noise, can induce a degradation of particle accelerator instantaneous luminosity or even sudden beam losses. This report introduces the HL-LHC project and discusses the importance of monitoring the effects of earthquakes on the present LHC beam orbit and luminosity using a novel instrument, the Precision Laser Inclinometer (PLI). After a brief description of the instrument principles, a comparison of data from the PLI and from the LHC beam instrumentation in the event of earthquakes is given. The aim is to characterize the response of the accelerator to remote or nearby Earth surface movements. The first results from simulation in comparison with data are presented. The impact of vibrations on high luminosity small-sized beam colliders, as in High Luminosity LHC among many other future projects, the possible applications of the PLI instrument and ideas about possible feedback systems conclude the contribution.

Slides THCBSH04 [13.317 MB]

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TUPSA012

Superconducting Stored Energy RF Linac as Free Electron Laser Driver

cavity, electron, FEL, linac

237

V.G. Kurakin, P.V. Kurakin
LPI, Moscow, Russia

Due to cavity losses in multi pass free electron laser (FEL), generation starts in it from definite threshold of driving electron beam current. Depending on generation wave range the threshold current strikes from fraction of ampere to dozens of amperes. In order to rich laser saturation, from hundreds to thousands electron bunches are required. Simple estimations give the value from units up to tens joules of bunches train energy in order to rich FEL saturation for infrared wave range (approximately 20 - 25 MeV of bunches energy and 3 A of pick current, bunch length being 1 cm). A beam with parameters mentioned might be obtained in rf superconducting linac operating in stored energy mode. The advantage of such approach is simplified linac power supply since dozens watts cw rf generator is required only to rich necessary accelerating voltage. At the same time the energy spread arising from beam loading may be compensated by additional cavities exited at shifted frequencies. In this paper Maxwell equations are used for beam-cavity interaction analysis. The bunch energy loss or the same the voltage induced by radiating bunch is expressed in terms of cavity external parameters. The detailed analysis of beam energy spread compensation is carried out followed by an example showing the reality of FEL schema suggested.

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WEPSB039

New Techniques for Operation and Diagnostics of Relativistic Electron Coolers

electron, photon, solenoid, scattering

449

J. Dietrich, M.W. Bruker, A. Hofmann, E. Riehn, T. Weilbach
HIM, Mainz, Germany
K. Aulenbacher, W. Klag
IKP, Mainz, Germany
M.I. Bryzgunov, V.V. Parkhomchuk, V.B. Reva
BINP SB RAS, Novosibirsk, Russia

The Helmholtz Institut Mainz (HIM) performs experiments related to possible improvements of high-energy d.c.-electron coolers. Results and activities concerning non-invasive beam diagnostics and beam control at large operating currents will be shown. Furthermore, progress of our project to use turbo generators as a means for potential-free power generation in high-energy electron coolers is presented.

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WEPSB056

Study of Oil Wells With the Use of Accelerator Tubes, Time and Energy Spectrometers of Neutrons and Gamma Rays in a Single Geophysical Complex

neutron, radiation, plasma, vacuum

490

A.E. Shikanov, B.Y. Bogdanovich, A.V. Il'inskiy, A.A. Isaev, K.I. Kozlovskiy, A. Nesterovich, E.D. Vovchenko
MEPhI, Moscow, Russia

The report discusses the finding of the coefficient of oil saturation of the reservoir by of nuclear methods. For this purpose, the data about pulse and the activation neutron logging and spectral logging of natural gamma activity are used in a single geophysical complex. As sources of neutron radiation can been applied accelerating tube (AT) based on different ion sources, such as plasma discharge with oscillating electrons (gas AT), vacuum arc and laser-plasma (vacuum AT). For investigation of the oil reservoir, in particular with heavy oil, we discuss the prospects of using vacuum accelerating tube based on a laser-plasma source of deuterons with coaxial acceleration geometry and pulsed magnetic isolation of electrons.

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WEPSB074

High Current Pulsing Deuteron Accelerator with Energy of 500 keV

neutron, plasma, experiment, cathode

527

A.A. Isaev, K.I. Kozlovskiy, A.E. Shikanov, E.D. Vovchenko
MEPhI, Moscow, Russia

It is reported on the development of a compact experimental model of the deuteron accelerator with energies up to 400 KeV. The ion current is about 1 kA and the current density is greater than 20 A/cm² in pulses with a duration of 0.5 mks and a repetition rate of 1 Hz. In this accelerator, we applied the effective ion source of laser-plasma and the optimized method of magnetic insulation of the electrons in the accelerating gap.

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THPSC022

High-Voltage Power Supply for GOG-1001

controls, monitoring, high-voltage, power-supply

587

V. Dokutovich, A.D. Chernyakin, D.V. Senkov
BINP SB RAS, Novosibirsk, Russia

At this time BINP are working on material research for the ITER project. The spatial inhomogeneity of deformation is the scope of this study. An optical pattern generator GOG-1001 that increases the energy of monochromatic light source is used in such experiments. GOG-1001 is powered by a high-voltage quasi-momentum PS that feeds energy stored in a capacitor bank to the generator's pump tube. A pulsed voltage source driven by FPGA controller module has been developed. The module controls correct bank charge, monitors tube's current and voltage as well as calculates the energy supplied to the bank and activates the generator. A hardware bank overcharge protection prevents the pump tube from failure. The developed source has two control modes; remote - workstation and manual - front panel. The source control logic is based on FPGA while communication and date computing is processed by a digital processor and a graphic display.
High-Voltage Power Supply, laser power,

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THPSC025

Generator of High-Voltage Pulse for High-Current Accelerator of Deuteron With Laser Starts

plasma, high-voltage, cathode, electron

594

E.D. Vovchenko, A.A. Isaev, K.I. Kozlovskiy, A.E. Shikanov
MEPhI, Moscow, Russia

The report deals with the source of pulsed high voltage, and simultaneously, source of the pulsed current for the magnetic insulation of electrons near the cathode that was developed for a high-current accelerator of deuterons with laser-plasma anode. The accelerating voltage up to 400 kV and ion current about 1 kA have been achieved. The current in the spiral inductor has reached 4 kA and it excludes breakdown between the cathode and anode for 0.5 mks. For synchronization of physical processes in accelerator of deuterons with pulsed power, the laser control is applied.

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THPSC047

A Faraday Cup for a Low Charge LWFA Electron Beam Measurement

electron, simulation, acceleration, plasma

635

V. Gubin, V.I. Trunov
Institute of Laser Physics, SB RAS, Novosibirsk, Russia
V.V. Gambaryan, A.E. Levichev, Yu. Maltseva, P.V. Martyshkin, A.A. Pachkov, S.N. Peshekhonov
BINP SB RAS, Novosibirsk, Russia

Nowadays laser wakefield acceleration (LWFA) is considered as one a perspective method for GeV electron beam production. Combination of laser accelerated electrons and Compton backscattering of probe light beam opens possibility to create the table top source of femtosecond light beam in x-ray and gamma range. Project of laser-driven Compton light source started in ILP SB RAS in collaboration with BINP SB RAS. Production of 1-10 pC electron beams sub-ps time range duration with energies up to 100 MeV is expected as a result of the first stage of the project. Since energy of electrons does not exceed of 100 MeV, it allows using Faraday cup (FC) with reasonable dimensions, instead of commonly used integrating current transformer (ICT). Geometry of FC was optimized taking into account of beam stopping simulation as well as low capacity requirement. RF properties, simulation of the system operation were carried out. System has been tested at the VEPP-5 electron linac. Results of development and testing of this FC are presented.

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