Experiments were performed at the CERN SPS with 120 GeV/c stored proton beams to assess the possibility of beam halo collimation assisted by bent crystals. A bent crystal was used to deflect horizontally by an angle of about 170 mu rad the beam halo protons in channeling states directing them into a 60 cm long tungsten absorber. The halo loss rate due to nuclear inelastic interactions of protons in the aligned crystal was up to five times smaller than for its amorphous orientation. Channeled fractions, (75 +/- 4)% and (85 +/- 5)% for the two tested silicon crystals, were measured by intercepting the deflected beam with another collimator located between the crystals and the absorber. The pixel detector (MEDIPIX) installed in a Roman pot inside the beam pipe was used to obtain visual images of the deflected beam.

First results on the SPS beam collimation with bent crystals

LIETTI, DANIELA;Mascagna Valerio;PREST, MICHELA;
2010-01-01

Abstract

Experiments were performed at the CERN SPS with 120 GeV/c stored proton beams to assess the possibility of beam halo collimation assisted by bent crystals. A bent crystal was used to deflect horizontally by an angle of about 170 mu rad the beam halo protons in channeling states directing them into a 60 cm long tungsten absorber. The halo loss rate due to nuclear inelastic interactions of protons in the aligned crystal was up to five times smaller than for its amorphous orientation. Channeled fractions, (75 +/- 4)% and (85 +/- 5)% for the two tested silicon crystals, were measured by intercepting the deflected beam with another collimator located between the crystals and the absorber. The pixel detector (MEDIPIX) installed in a Roman pot inside the beam pipe was used to obtain visual images of the deflected beam.
2010
Collimation; bent crystal LHC; SPS
Scandale, W; Arduini, G; Assmann, R; Bracco, C; Gilardoni, S; Ippolito, V; Laface, E; Losito, R; Masi, A; Metral, E; Previtali, V; Redaelli, S; Silari, M; Tlustos, L; Bagli, Enrico; Baricordi, S; Dalpiaz, Pietro; Guidi, Vincenzo; Mazzolari, Andrea; Vincenzi, Donato; Della Mea, Gianantonio; Lombardi, Augusto; De Salvador, Davide; Vallazza Erik, Silvio; Bolognini, Davide; Hasan, Said; Lietti, Daniela; Mascagna, Valerio; Mattera, Andrea; Prest, Michela; Cavoto, Gianluca; Ludovici, Lucio; Mirarchi, Daniele; Santacesaria, Roberta; Valente, Paolo; Murtas, Fabrizio; Afonin, Ag; Chesnokov, Ya; Maisheev, Va; Yazynin, Ia; Kovalenko, Ad; Taratin, Am; Denisov, As; Gavrikov, Ya; Ivanov, Ym; Lapina, Lp; Malyarenko, Lg; Skorobogatov, Vv; Suvorov, Vm; Vavilov, Sa; Mokhov, N; Still, D; Robert Demolaize, G; Markiewicz, T; Oriunno, M.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/1737409
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 115
  • ???jsp.display-item.citation.isi??? 95
social impact