RUPAC2012 - List of Keywords (scattering)

Paper	Title	Other Keywords	Page
TUCCH01	New Ideas for Crystal Collimation	collimation, extraction, proton, simulation	79
	V.V. Tikhomirov, A.I. Sytov Belarussian State University, Scientific Research Institute of Nuclear Problems, Minsk, Belarus
	Beam halo represents considerable threat for superconducting magnets. Crystals can increase the efficiency of collimation system being used both in channeling and volume reflection modes. We suggest to facilitate both these approaches using, respectively, the crystal cut method* to increase channeling capture efficiency and multiple volume reflection from different planes of one bent crystal(,) to increase the volume reflection angle. Efficiency of these methods drastically depends on the halo particle transverse distribution. The first approach is most efficient at smallest transverse diffusion rate while the second one in the opposite case. We also demonstrate that the miscut, i.e. the nonparallelity of lateral crystal surface and atomic planes, can considerably affect the collimation efficiency at present crystal collimation SPS experiments while will not be so important in the real LHC environment. V.V. Tikhomirov, JINST 2(2007) P08006. V.V. Tikhomirov, Phys. Lett. B. 655(2007)217. * W. Scandale, et al, Phys. Lett. B. 682(2009)274; EPL. 93(2011)56002.
	Slides TUCCH01 [2.222 MB]

MOPPA021	176 MHz Solid State Microwave Generator Design	impedance, simulation, resonance, rf-amplifier	290
	A.Yu. Smirnov, E.V. Ivanov, K.I. Nikolskiy, S.A. Polikhov, N.V. Tikhomirova Siemens Research Center, Moscow,, Russia O. Heid, T.J.S. Hughes Siemens AG, Erlangen, Germany
	This paper concerns the R&D work upon design of a compact RF amplifier to be used for linear accelerators. The machine under development will operate at 176 MHz with output power of 25 kW in continuous wave regime. It consists of 48 push-pull PCB modules (approx. 500W output power each), connected in parallel to several radial filter rings, which both allow class-F operation and combine the power from the modules, delivering it to a single 50 Ω coax cable. The CST simulations and the results of 324 MHz test prototype measurements are presented.

TUPPB040	Angiography X-ray Monochromatic Source Based on Radiation From Crystals	radiation, electron, photon, laser	406
	T.V. Bondarenko, G.B. Sharkov Siemens LLC, Moscow, Russia Y.A. Bashmakov LPI, Moscow, Russia S.M. Polozov MEPhI, Moscow, Russia
	Nowadays angiography has become one of the most commonly used medical procedures. However the X-ray tubes are mostly used in angiography imaging systems. The problem that encounters in using X-ray tubes is low monochromaticity due to bremsstrahlung while angiography imaging requires quasimonochromatic energy spectrum for better image quality and lower dose rate obtained by the patient. The use of the monocrystaline target at the medical electron LINAC can be one of the possible ways to obtain the monochromatic X-ray radiation. This type of X-ray generator will provide monochromatic radiation with photon energy dependent on the electron beam energy. The X-ray generation mechanism, possibilities of monocrystal usage as an X-ray source for angiography and requirements for beam parameters are discussed.

WEPPC056	Improving of Uniformity of the Electron-Beam Treatment of Materials by ELV Accelerators	electron, radiation, controls, focusing	557
	D.A. Kogut, S. Fadeev, N.K. Kuksanov BINP SB RAS, Novosibirsk, Russia
	The problem of the absorbed dose distribution during the EB treatment by ELV accelerator is considered. The value of the absorbed dose is determined by the speed of scanning electron beam along the accelerator exit window (i.e. the movement across the conveyor). It is determined both by the shape of scanning current and by the geometry of scanning magnets. A simple way to improve the dose distribution near the edges of the extraction device of accelerator is suggested. It allows to provide the non-uniformity less 4%.

WEPPC060	Experimental Channel for Proton Beam with Energy 9 GeV	target, proton, quadrupole, vacuum	566
	M.M. Kats ITEP, Moscow, Russia
	It was described one of possible version of experimental channel for proton beam with energy 9 GeV for ITEP. It based on proton beam after quick extraction, on existing experimental hall and on existing quadrupoles.

WEPPD010	Study of Two Cavities Accelerating Module at SR Source Siberia-2	cavity, impedance, injection, beam-loading	587
	V.I. Moiseev, V. Korchuganov, A.S. Smygacheva, A. Vernov NRC, Moscow, Russia
	SR source Siberia-2 RF system includes an accelerating module consisting of two 181 MHz cavities powered by one amplifier. Some problem occured now is the accelerating voltage instubility under high beam currents conditions. The phase shift between the voltages at cavities causes the asymmetry in beam loading and detuning of cavities. To study the performances of accelerating module, the analytical description has been developed. The whole system can be characterized by seven parameters. These base parameters give the relations of voltages and currents in system. Measurements determine the real values of the base parameters. Set of non linear equations recived can be reduced to the voltages and currents in system as the functions of beam current and energy. The results can be applied to injection and ramping in Siberia-2.

Paper

Title

Other Keywords

Page

TUCCH01

New Ideas for Crystal Collimation

collimation, extraction, proton, simulation

79

V.V. Tikhomirov, A.I. Sytov
Belarussian State University, Scientific Research Institute of Nuclear Problems, Minsk, Belarus

Beam halo represents considerable threat for superconducting magnets. Crystals can increase the efficiency of collimation system being used both in channeling and volume reflection modes. We suggest to facilitate both these approaches using, respectively, the crystal cut method* to increase channeling capture efficiency and multiple volume reflection from different planes of one bent crystal(**,***) to increase the volume reflection angle. Efficiency of these methods drastically depends on the halo particle transverse distribution. The first approach is most efficient at smallest transverse diffusion rate while the second one in the opposite case. We also demonstrate that the miscut, i.e. the nonparallelity of lateral crystal surface and atomic planes, can considerably affect the collimation efficiency at present crystal collimation SPS experiments while will not be so important in the real LHC environment.
* V.V. Tikhomirov, JINST 2(2007) P08006.
** V.V. Tikhomirov, Phys. Lett. B. 655(2007)217.
*** W. Scandale, et al, Phys. Lett. B. 682(2009)274; EPL. 93(2011)56002.

Slides TUCCH01 [2.222 MB]

MOPPA021

176 MHz Solid State Microwave Generator Design

impedance, simulation, resonance, rf-amplifier

290

A.Yu. Smirnov, E.V. Ivanov, K.I. Nikolskiy, S.A. Polikhov, N.V. Tikhomirova
Siemens Research Center, Moscow,, Russia
O. Heid, T.J.S. Hughes
Siemens AG, Erlangen, Germany

This paper concerns the R&D work upon design of a compact RF amplifier to be used for linear accelerators. The machine under development will operate at 176 MHz with output power of 25 kW in continuous wave regime. It consists of 48 push-pull PCB modules (approx. 500W output power each), connected in parallel to several radial filter rings, which both allow class-F operation and combine the power from the modules, delivering it to a single 50 Ω coax cable. The CST simulations and the results of 324 MHz test prototype measurements are presented.

TUPPB040

Angiography X-ray Monochromatic Source Based on Radiation From Crystals

radiation, electron, photon, laser

406

T.V. Bondarenko, G.B. Sharkov
Siemens LLC, Moscow, Russia
Y.A. Bashmakov
LPI, Moscow, Russia
S.M. Polozov
MEPhI, Moscow, Russia

Nowadays angiography has become one of the most commonly used medical procedures. However the X-ray tubes are mostly used in angiography imaging systems. The problem that encounters in using X-ray tubes is low monochromaticity due to bremsstrahlung while angiography imaging requires quasimonochromatic energy spectrum for better image quality and lower dose rate obtained by the patient. The use of the monocrystaline target at the medical electron LINAC can be one of the possible ways to obtain the monochromatic X-ray radiation. This type of X-ray generator will provide monochromatic radiation with photon energy dependent on the electron beam energy. The X-ray generation mechanism, possibilities of monocrystal usage as an X-ray source for angiography and requirements for beam parameters are discussed.

WEPPC056

Improving of Uniformity of the Electron-Beam Treatment of Materials by ELV Accelerators

electron, radiation, controls, focusing

557

D.A. Kogut, S. Fadeev, N.K. Kuksanov
BINP SB RAS, Novosibirsk, Russia

The problem of the absorbed dose distribution during the EB treatment by ELV accelerator is considered. The value of the absorbed dose is determined by the speed of scanning electron beam along the accelerator exit window (i.e. the movement across the conveyor). It is determined both by the shape of scanning current and by the geometry of scanning magnets. A simple way to improve the dose distribution near the edges of the extraction device of accelerator is suggested. It allows to provide the non-uniformity less 4%.

WEPPC060

Experimental Channel for Proton Beam with Energy 9 GeV

target, proton, quadrupole, vacuum

566

M.M. Kats
ITEP, Moscow, Russia

It was described one of possible version of experimental channel for proton beam with energy 9 GeV for ITEP. It based on proton beam after quick extraction, on existing experimental hall and on existing quadrupoles.

WEPPD010

Study of Two Cavities Accelerating Module at SR Source Siberia-2

cavity, impedance, injection, beam-loading

587

V.I. Moiseev, V. Korchuganov, A.S. Smygacheva, A. Vernov
NRC, Moscow, Russia

SR source Siberia-2 RF system includes an accelerating module consisting of two 181 MHz cavities powered by one amplifier. Some problem occured now is the accelerating voltage instubility under high beam currents conditions. The phase shift between the voltages at cavities causes the asymmetry in beam loading and detuning of cavities. To study the performances of accelerating module, the analytical description has been developed. The whole system can be characterized by seven parameters. These base parameters give the relations of voltages and currents in system. Measurements determine the real values of the base parameters. Set of non linear equations recived can be reduced to the voltages and currents in system as the functions of beam current and energy. The results can be applied to injection and ramping in Siberia-2.