BEAM HALO CRYSTAL EXTRACTION FROM THE TEVATRON DURING COLLIDER RUNS

Citation
E. Tsyganov et A. Taratin, BEAM HALO CRYSTAL EXTRACTION FROM THE TEVATRON DURING COLLIDER RUNS, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 363(3), 1995, pp. 511-519
Citations number
23
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
ISSN journal
01689002
Volume
363
Issue
3
Year of publication
1995
Pages
511 - 519
Database
ISI
SICI code
0168-9002(1995)363:3<511:BHCEFT>2.0.ZU;2-N
Abstract
We have shown by the computer simulation how to extract 1-TeV beam hal o protons from the Tevatron using a bent crystal. More than 10(7) prot ons per second, now lost on scrapers and collimators, can be extracted in a ''passive'' mode, without interference with colliding beam exper iments. This would reduce background in the colliding beam detectors. The problem of an existing imperfect layer at a bent crystal surface i s solved by means of a thin crystal that is used as a crystal mirror f or beam halo particles. The extraction efficiency can be as large as 9 9%. The availability of an extracted beam will enhance detector R&D st udies at Fermilab and give an additional boost to the U.S. participati on in the LHC experiments. As a second priority, small fixed target ex periments could be carried out. Crystal scrapers-deflectors would also work well for the LHC where background radiation due to a beam halo l oss could be reduced by the factor of 100.