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G. Naumenko,
A. Potylitsyn,
S. Araki,
A. Aryshev,
H. Hayano,
P. Karataev,
T. Muto,
J. Urakawa,
M. Ross,
D. Cline, Y. Fukui,
R. Hamatsu
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ABSTRACT: The development of the non-invasive bunch size diagnostics based on the diffraction radiation is now in progress in frame of TPU-KEK-SLAC collaboration. The experimental test of a transverse beam size measurement was performed successful on the KEK-ATF extracted electron beam. However many difficulties emerge if we going from the one GeV electron energy to the several tenth GeV electron beams. The extremely high Lorenz-factor value gives rise to the some problems, such as large contribution of a radiation from an accelerator construction elements in submillimeter wavelength region, extremely pre-wave zone effect even in the optical range, exceeding of the electron beam divergence over the diffraction radiation cone, and so on. More over, the sensitivity of the method based on the optical diffraction radiation from flat slit target decrease catastrophic when an electron energy increase up to several tenth GeV. We suggest the new method based on the phase shift on the slit target, consisting on the two semi-planes which are turned at a some angle one to other (crossed target technique) and present here the results of experimental test of this technique. Also we discuss the origins of indicated difficulties and suggest the ways of these problems solution.
05/2006
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ABSTRACT: We design a muon cooling ring with curved Lithium lenses for the 6 dimensional muon phase space cooling. The cooling ring can be the final muon phase space cooling ring for a Higgs Factory, a low energy muon collider. Tracking simulation shows promising muon cooling with simplified magneti element models.
Particle Accelerator Conference, 2005. PAC 2005. Proceedings of the; 06/2005
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Y. Fukui,
D. Cline,
Feng Zhou,
M. Ross,
P. Bolton,
J. Urakawa,
M. Tobiyama,
T. Muto,
P. Karataev,
A. Aryshev,
R. Hamatsu,
A. Potylitsyn,
G. Naumenko,
A. Sharafutdinov
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ABSTRACT: ODR(Optical Diffraction Radiation) transverse beam size measurement at the SLAC FFTB at 28.5 GeV is a challenge and it requires special target and optics system, which is much difficult than the conventional ODR beam size measurement. We propose to use a curved disphased conductive slit target to recover the sensitivity in the measurement of the single bunch transverse beam size by using ODR photons from a conductive slit. In order to cancel the effect of the beam divergence, the conductive slit target surface must be curved. Also, we can obtain the focused interference pattern of the ODR photons at the detector at the shorter distance from the target than the γ<sup>2</sup>λ, by using lens optics system.
Particle Accelerator Conference, 2005. PAC 2005. Proceedings of the; 06/2005
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G. Naumenko,
A. Potylitsyn,
S. Araki,
A. Aryshev,
H. Hayano,
P. Karataev,
T. Muto,
J. Urakawa,
M. Ross,
D. Cline, Y. Fukui,
R. Hamatsu
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ABSTRACT: A new method based on diffraction radiation emitted by charged particles moving through a slit between two flat rectangular plates inclined with respect to each other around the axis perpendicular to the slit has been suggested. The theoretical model for calculating the ODR radiation from such targets (including focusing by cylindrical lens) is presented. It is shown that the sensitivity of this method does not depend on the Lorenz-factor directly. The target with the “dis-phased” angle 6.2 milliradians and the slit width 425 microns was manufactured for experimental test. Some preliminary experimental results are presented.
Particle Accelerator Conference, 2005. PAC 2005. Proceedings of the; 06/2005
