RUPAC2012 - List of Authors (Bashmakov, Y.A.)

Paper	Title	Page
TUPPB016	Investigation of Phase Trajectories of Particles Motion in a Synchrotron Near the Nonlinear Resonance of Third Order	347
	Y.A. Bashmakov LPI, Moscow, Russia
	The nonlinear resonance of third order plays an important role in the particle dynamics in circular accelerators, colliders and storage rings and is widely used for slow extraction of particles from synchrotrons. Consideration is carried out in the canonical variables X, Y which at a given accelerator azimuth are simply related to the angle and the deviation of the circulating particles relative to the equilibrium orbit. The problem is reduced to the construction of the phase trajectories, which are the curves of the third or fourth order and determine the type of the motion near the resonance under consideration. The construction of the phase trajectories is performed by the Klein's perturbation method. The influence on the particles dynamics of oсtupole component of the magnetic fields is investigated.

TUPPB040	Angiography X-ray Monochromatic Source Based on Radiation From Crystals	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.

Paper

Title

Page

Investigation of Phase Trajectories of Particles Motion in a Synchrotron Near the Nonlinear Resonance of Third Order

347

Y.A. Bashmakov
LPI, Moscow, Russia

The nonlinear resonance of third order plays an important role in the particle dynamics in circular accelerators, colliders and storage rings and is widely used for slow extraction of particles from synchrotrons. Consideration is carried out in the canonical variables X, Y which at a given accelerator azimuth are simply related to the angle and the deviation of the circulating particles relative to the equilibrium orbit. The problem is reduced to the construction of the phase trajectories, which are the curves of the third or fourth order and determine the type of the motion near the resonance under consideration. The construction of the phase trajectories is performed by the Klein's perturbation method. The influence on the particles dynamics of oсtupole component of the magnetic fields is investigated.

TUPPB040

Angiography X-ray Monochromatic Source Based on Radiation From Crystals

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.