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26 April 2024

» arxiv » hep-ex/0111001

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Application of bent crystals at IHEP 70-GeV accelerator to enhance the efficiency of its usage
V. I. Kotov ; A. G. Afonin ; V. M. Biryukov ; Y. A. Chesnokov ; N. A. Galyaev ; V. N. Gres ; V. A. Maisheev ; V. A. Medvedev ; A. V. Minchenko ; V. I. Terekhov ; E. F. Troyanov ; Y. S. Fedotov ; V. N. Zapolsky ; B. A. Zelenov ; Y. M. Ivanov ; W. Scandale ;
Date:	1 Nov 2001
Journal:	EPAC 2000 Proceedings (Vienna), pp.364-366
Subject:	hep-ex
Abstract:	Bent crystal was extracting 70-GeV protons with average intensity 4*10^11 (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 10^7 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.
Source:	arXiv, hep-ex/0111001
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