2001/10/31 by V. I. Kotov, A. G. Afonin, V. M. Biryukov +13
Physics and Astronomy · #hep-ex
published as EPAC 2000 Proceedings (Vienna), pp.364-366 · 6pp. Presented at EPAC 2000
arxiv created 2001/10/31 · arxiv updated 2009/11/30
Bent crystal was extracting 70-GeV protons with average intensity 4*1011 (as measured in external beamline) per spill of 1.6 s duration, in parallel to the simultaneous work of two internal targets in the accelerator ring. An additional crystal, placed in the external beamline, was deflecting a small part of the extracted beam with intensity 107 protons toward another physics experiment. Crystal-extracted beam had a typical size of 4 mm by 4 mm fwhm at the end of the external beamline. Measurements for the extraction efficiency and other characteristics at the simultaneous work of four experimental set-ups are presented. With crystal working in the above-said regime during one month, no degradation of channeling was observed. The studies of extraction efficiency have been continued with new crystals.