Experimental evidence for multi-pass extraction with a bent crystal

Author

Dehning, B. ; Elsener, K. ; Fidecaro, G. ; Gyr, M. ; Herr, W. ; Klem, J. ; Scandale, W. ; Vuagnin, G. ; Weisse, E. ; Weisz, S. ; Moller, S.P. ; Uggerhoj, E. ; Freund, A. ; Hustache, R. ; Carboni, G. ; Bussa, M.P. ; Tosello, E.

Author_Institution

CERN, Geneva, Switzerland

Volume

1

fYear

1995

fDate

1-5 May 1995

Firstpage

470

Abstract

The feasibility of extracting particles from the halo of a circulating proton beam using a bent silicon crystal has been demonstrated experimentally at the SPS for a beam energy of 120 GeV. Presently studies are conducted to understand the extraction mechanisms and the measured efficiencies. In particular the contribution of multi-pass extraction, where the particles can pass through the crystal many times before being channeled and extracted, is investigated. In a recent experiment, using a crystal especially fabricated with a finite amorphous layer on its surface, it has been proven that multi-pass extraction plays an important role. The experiment is described and the implication for further studies are discussed

Keywords

channelling; particle beam extraction; proton accelerators; proton beams; silicon; storage rings; synchrotrons; 120 GeV; SPS; Si; bent Si crystal; channeled; circulating proton beam; efficiencies; extraction mechanism; finite amorphous layer; halo; multipass extraction; Amorphous materials; Crystals; Interference; Large Hadron Collider; Noise level; Particle beams; Proton accelerators; Silicon; Steady-state; White noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1995., Proceedings of the 1995

Conference_Location

Dallas, TX

Print_ISBN

0-7803-2934-1

Type

conf

DOI

10.1109/PAC.1995.504694

Filename

504694