Silicon crystal was channeling and extracting 70-GeV protons from the U-70 accelerator with efficiency of 85.3+-2.8% as measured for a beam of 10^12 protons directed towards crystals of 2 mm length in spills of 1-2 s duration. The experimental data follow very well the prediction of Monte Carlo simulations. This success is important to devise a more efficient use of the U-70 accelerator in Protvino and provides a crucial support for implementation of crystal-assisted collimation of gold ion beam in RHIC and slow extraction from AGS onto E952, now in preparation at Brookhaven Nat'l Lab. Future applications, spanning in the energy from sub-GeV (medical) to order of 1 GeV (scraping in the SNS, extraction from COSY) to order of 1 TeV and beyond (scraping in the Tevatron, LHC, VLHC), can benefit from these studies.
@article{arxiv.hep-ex/0112008,
title = {Crystal experiments on efficient beam extraction},
author = {A. G. Afonin and V. M. Biryukov and V. T. Baranov and V. N. Chepegin and Y. Chesnokov and V. Kotov and V. Terekhov and E. Troyanov and V. Guidi and G. Martinelli and M. Stefancich and D. Vincenzi and Yu. Ivanov and D. Trbojevic and W. Scandale and M. Breese},
journal= {arXiv preprint arXiv:hep-ex/0112008},
year = {2007}
}
Comments
12pp. Presented at 19-th Intern. Conference on Atomic Collisions in Solids (ICACS-19: Paris, July 29 - August 3, 2001)