Journal
PHYSICS LETTERS B
Volume 758, Issue -, Pages 129-133Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2016.05.004
Keywords
Accelerator; Beam collimation; Crystal; Channeling
Funding
- EU FP7 HiLumi LHC Grant [284404]
- UK Science and Technology Facilities Council
- Russian Foundation for Basic Research [05-02-17622, 06-02-16912]
- RF President Foundation [SS-1633.2014.2]
- LHC Program of Presidium of Russian Academy of Sciences
- ERC Ideas Consolidator Grant [615089]
- EuCARD program within the Collimators and Materials for high power beams work package (Colmat-WP) [GA 227579]
- [RFBR-CERN 12-02-91532]
- European Research Council (ERC) [615089] Funding Source: European Research Council (ERC)
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Two high-accuracy goniometers equipped with two bent silicon crystals were installed in the betatron cleaning insertion of the CERN Large Hadron Collider (LHC) during its long shutdown. First beam tests were recently performed at the LHC with 450 GeV/c and 6500 GeV/c stored proton beams to investigate the feasibility of beam halo collimation assisted by bent crystals. For the first time channeling of 6500 GeV/c protons was observed in a particle accelerator. A strong reduction of beam losses due to nuclear inelastic interactions in the aligned crystal in comparison with its amorphous orientation was detected. The loss reduction value was about 24. Thus, the results show that deflection of particles by a bent crystal due to channeling is effective for this record particle energy. (C) 2016 The Authors. Published by Elsevier B.V.
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