Physics Letters B (Sep 2015)
Observation of strong leakage reduction in crystal assisted collimation of the SPS beam
- W. Scandale,
- G. Arduini,
- M. Butcher,
- F. Cerutti,
- M. Garattini,
- S. Gilardoni,
- A. Lechner,
- R. Losito,
- A. Masi,
- A. Mereghetti,
- E. Metral,
- D. Mirarchi,
- S. Montesano,
- S. Redaelli,
- R. Rossi,
- P. Schoofs,
- G. Smirnov,
- E. Bagli,
- L. Bandiera,
- S. Baricordi,
- P. Dalpiaz,
- G. Germogli,
- V. Guidi,
- A. Mazzolari,
- D. Vincenzi,
- G. Claps,
- S. Dabagov,
- D. Hampai,
- F. Murtas,
- G. Cavoto,
- F. Iacoangeli,
- L. Ludovici,
- R. Santacesaria,
- P. Valente,
- F. Galluccio,
- A.G. Afonin,
- Yu.A. Chesnokov,
- A.A. Durum,
- V.A. Maisheev,
- Yu.E. Sandomirskiy,
- A.A. Yanovich,
- A.D. Kovalenko,
- A.M. Taratin,
- Yu.A. Gavrikov,
- Yu.M. Ivanov,
- L.P. Lapina,
- J. Fulcher,
- G. Hall,
- M. Pesaresi,
- M. Raymond
Affiliations
- W. Scandale
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- G. Arduini
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- M. Butcher
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- F. Cerutti
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- M. Garattini
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- S. Gilardoni
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- A. Lechner
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- R. Losito
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- A. Masi
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- A. Mereghetti
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- E. Metral
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- D. Mirarchi
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- S. Montesano
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- S. Redaelli
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- R. Rossi
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- P. Schoofs
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- G. Smirnov
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
- E. Bagli
- INFN Sezione di Ferrara, Dipartimento di Fisica, Università di Ferrara, Ferrara, Italy
- L. Bandiera
- INFN Sezione di Ferrara, Dipartimento di Fisica, Università di Ferrara, Ferrara, Italy
- S. Baricordi
- INFN Sezione di Ferrara, Dipartimento di Fisica, Università di Ferrara, Ferrara, Italy
- P. Dalpiaz
- INFN Sezione di Ferrara, Dipartimento di Fisica, Università di Ferrara, Ferrara, Italy
- G. Germogli
- INFN Sezione di Ferrara, Dipartimento di Fisica, Università di Ferrara, Ferrara, Italy
- V. Guidi
- INFN Sezione di Ferrara, Dipartimento di Fisica, Università di Ferrara, Ferrara, Italy
- A. Mazzolari
- INFN Sezione di Ferrara, Dipartimento di Fisica, Università di Ferrara, Ferrara, Italy
- D. Vincenzi
- INFN Sezione di Ferrara, Dipartimento di Fisica, Università di Ferrara, Ferrara, Italy
- G. Claps
- INFN LNF, Via E. Fermi, 40 00044 Frascati (Roma), Italy
- S. Dabagov
- INFN LNF, Via E. Fermi, 40 00044 Frascati (Roma), Italy
- D. Hampai
- INFN LNF, Via E. Fermi, 40 00044 Frascati (Roma), Italy
- F. Murtas
- INFN LNF, Via E. Fermi, 40 00044 Frascati (Roma), Italy
- G. Cavoto
- INFN Sezione di Roma, Piazzale Aldo Moro 2, 00185 Rome, Italy
- F. Iacoangeli
- INFN Sezione di Roma, Piazzale Aldo Moro 2, 00185 Rome, Italy
- L. Ludovici
- INFN Sezione di Roma, Piazzale Aldo Moro 2, 00185 Rome, Italy
- R. Santacesaria
- INFN Sezione di Roma, Piazzale Aldo Moro 2, 00185 Rome, Italy
- P. Valente
- INFN Sezione di Roma, Piazzale Aldo Moro 2, 00185 Rome, Italy
- F. Galluccio
- INFN Sezione di Napoli, Italy
- A.G. Afonin
- Institute of High Energy Physics, Moscow Region, RU-142284 Protvino, Russia
- Yu.A. Chesnokov
- Institute of High Energy Physics, Moscow Region, RU-142284 Protvino, Russia
- A.A. Durum
- Institute of High Energy Physics, Moscow Region, RU-142284 Protvino, Russia
- V.A. Maisheev
- Institute of High Energy Physics, Moscow Region, RU-142284 Protvino, Russia
- Yu.E. Sandomirskiy
- Institute of High Energy Physics, Moscow Region, RU-142284 Protvino, Russia
- A.A. Yanovich
- Institute of High Energy Physics, Moscow Region, RU-142284 Protvino, Russia
- A.D. Kovalenko
- Joint Institute for Nuclear Research, Joliot-Curie 6, 141980, Dubna, Moscow Region, Russia
- A.M. Taratin
- Joint Institute for Nuclear Research, Joliot-Curie 6, 141980, Dubna, Moscow Region, Russia
- Yu.A. Gavrikov
- Petersburg Nuclear Physics Institute, 188300 Gatchina, Leningrad Region, Russia
- Yu.M. Ivanov
- Petersburg Nuclear Physics Institute, 188300 Gatchina, Leningrad Region, Russia
- L.P. Lapina
- Petersburg Nuclear Physics Institute, 188300 Gatchina, Leningrad Region, Russia
- J. Fulcher
- Imperial College, London, United Kingdom
- G. Hall
- Imperial College, London, United Kingdom
- M. Pesaresi
- Imperial College, London, United Kingdom
- M. Raymond
- Imperial College, London, United Kingdom
- DOI
- https://doi.org/10.1016/j.physletb.2015.07.040
- Journal volume & issue
-
Vol. 748,
no. C
pp. 451 – 454
Abstract
In ideal two-stage collimation systems, the secondary collimator–absorber should have its length sufficient to exclude practically the exit of halo particles with large impact parameters. In the UA9 experiments on the crystal assisted collimation of the SPS beam a 60 cm long tungsten bar is used as a secondary collimator–absorber which is insufficient for the full absorption of the halo protons. Multi-turn simulation studies of the collimation allowed to select the position for the beam loss monitor downstream the collimation area where the contribution of particles deflected by the crystal in channeling regime but emerging from the secondary collimator–absorber is considerably reduced. This allowed observation of a strong leakage reduction of halo protons from the SPS beam collimation area, thereby approaching the case with an ideal absorber.
Keywords
