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Demonstration of loss reduction using a thin bent crystal to shadow an electrostatic septum during resonant slow extraction
/ Velotti, Francesco (CERN) ; Addesa, Francesca (INFN, Rome) ; Afonin, Alexander (Serpukhov, IHEP) ; Bestmann, Patrick (CERN) ; Borg, Johan (Imperial Coll., London) ; Butcher, Mark (CERN) ; Calviani, Marco (CERN) ; Chesnokov, Yuri (Serpukhov, IHEP) ; Denisov, Alexander (St. Petersburg, INP) ; Di Castro, Mario (CERN) et al.
A proof-of-principle experiment demonstrating the feasibility of using a thin, bent crystal aligned upstream of an extraction septum (ES) to increase the efficiency of the third-integer resonant slow extraction process has been carried out at the CERN Super Proton Synchrotron (SPS). With the primary aim of reducing the beam loss and induced radio-activation of the SPS, the crystal was aligned to both the beam and the septum to reduce by up to 40% the beam intensity impinging the ES and increase the intensity entering the external transfer line. [...]
CERN-ACC-2019-218.-
2019 - 5 p.
- Published in : 10.18429/JACoW-IPAC2019-THXXPLM2
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THXXPLM2
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2.
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Crystal for slow extraction loss-reduction of the SPS electrostatic septum
/ Esposito, Luigi Salvatore (CERN) ; Addesa, Francesca (INFN, Rome) ; Afonin, Alexander (Serpukhov, IHEP) ; Bestman, Patrick (CERN) ; Borg, Johan (Imperial Coll., London) ; Butcher, Mark (CERN) ; Calviani, Marco (CERN) ; Chesnokov, Yuri (Serpukhov, IHEP) ; Denisov, Alexander (St. Petersburg, INP) ; Di Castro, Mario (CERN) et al.
The use of a bent crystal was investigated in order to reduce the losses at the CERN Super Proton Synchrotron (SPS) electrostatic septum (ZS) during the slow extraction of 400 GeV/c protons toward the North Area. The crystal, installed a few meters upstream of the ZS, bends protons that would otherwise impinge on the ZS wires. [...]
CERN-ACC-2019-179.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPMP028
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPMP028
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3.
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Manipulation of Negatively Charged Beams via Coherent Effects in Bent Crystals
/ Scandale, Walter (CERN) ; Guidi, Vincenzo (INFN, Ferrara) ; Bagli, Enrico (INFN, Ferrara) ; Mazzolari, Andrea (INFN, Ferrara) ; Afonin, Alexander (Serpukhov, IHEP) ; Chesnokov, Yuri (Serpukhov, IHEP) ; Maisheev, Vladimir (Serpukhov, IHEP) ; Yazynin, Igor (Serpukhov, IHEP) ; Baricordi, Stefano (Ferrara U.) ; Dalpiaz, Pietro (Ferrara U.) et al.
We review the experimental evidences we recorded with volume reflection and planar and axial channelings with negatively charged particles beam. High deflection efficiency was observed in all cases [...]
2010
External link: Published version from JACoW
In : 1st International Particle Accelerator Conference, Kyoto, Japan, 23 - 28 May 2010, pp.THPD052
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4.
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The UA9 setup for the double-crystal experiment in CERN-SPS
/ CERN UA 009 collaboration
Experiments to measure the electric and the magnetic moments of short-lived baryons using an internal target and two bent crystals in the vicinity of one of the existing LHC detectors were recently proposed, in the frame of the Physics Beyond Colliders Working Group at CERN. Investigating fixed-target physics in the LHC with in-vacuum solid targets is an unprecedented challenge. [...]
CERN-PBC-Notes-2021-022.-
2020 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 975 (2020) 164175
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5.
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Observation of channeling in bent crystals at the CERN LHC
/ Rossi, Roberto (CERN ; INFN, Rome ; U. Rome La Sapienza (main)) ; Scandale, Walter (CERN) ; Arduini, Gianluigi (CERN) ; Butcher, Mark (CERN) ; Cerutti, Francesco (CERN) ; Garattini, Marco (CERN) ; Gilardoni, Simone (CERN) ; Lechner, Anton (CERN) ; Losito, Roberto (CERN) ; Masi, Alessandro (CERN) et al.
SISSA, 2016 - 4 p.
- Published in : PoS ICHEP2016 (2016) 867
PoS Open Access Article: PDF; External link: PoS server
In : 38th International Conference on High Energy Physics, Chicago, IL, USA, 03 - 10 Aug 2016, pp.867
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6.
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Multiple scattering of positively charged particles moving near the (111) plane in a silicon single crystal
/ Scandale, W (Imperial Coll., London) ; Cerutti, F (CERN) ; Esposito, L S (CERN) ; Garattini, M (CERN) ; Gilardoni, S (CERN) ; Losito, R (CERN) ; Masi, A (CERN) ; Mirarchi, D (CERN) ; Redaelli, S (CERN) ; Smirnov, G (CERN) et al.
The article is devoted to the study of the suppression of multiple scattering of positively charged particles with momenta of 180 GeV/c and 400 GeV/c passing through bent single crystals of silicon at small angles to the plane (111) both in channeling mode and in the above-barrier state. For the first time, the suppression of the effect of multiple scattering of non-channeling particles passing at a small angle to one of the planes of a silicon single crystal was observed. [...]
Germany : Springer Nature, 2024 - 6 p.
- Published in : Eur. Phys. J. Plus 139 (2024) 1041
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7.
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Exclusive production of heavy quarkonia as a probe of the low x and low scale gluon PDF
/ Flett, C.A. (Liverpool U., Dept. Math.) ; Jones, S.P. (CERN) ; Martin, A.D. (Durham U., IPPP) ; Ryskin, M.G. (Durham U., IPPP ; St. Petersburg, INP) ; Teubner, T. (Liverpool U., Dept. Math.)
We discuss the exclusive $J/\psi$ photoproduction process, as measured recently at LHCb, as a means of constraining and ultimately determining the low $x$ and low $Q$ gluon PDF. [...]
arXiv:1912.09128 ; CERN-TH-2019-223 ; IPPP/19/96 ; LTH 1221.
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5 p.
Fulltext
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8.
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Testing the prototype detectors for the muon tracking system of the CBM experiment at the CERN PS accelerator
/ Atkin, E V (Moscow Phys. Eng. Inst.) ; Volkov, S S (Moscow Phys. Eng. Inst. ; St. Petersburg, INP) ; Voronin, A G (SINP, Moscow) ; Ivanov, V V (Moscow Phys. Eng. Inst. ; St. Petersburg, INP) ; Komkov, B G (St. Petersburg, INP) ; Kudin, L G (St. Petersburg, INP) ; Malankin, E Z (Moscow Phys. Eng. Inst.) ; Nikulin, V N (St. Petersburg, INP) ; Roshchin, E V (Moscow Phys. Eng. Inst. ; St. Petersburg, INP) ; Samsonov, V M (Moscow Phys. Eng. Inst. ; St. Petersburg, INP) et al.
Performance of the gas-filled detector prototypes based on the GEM, TGEM, and Micromegas technologies was studied on the test beam of the CERN PS accelerator. Three-component mixtures based on Ar and He were used as the working gas. [...]
2016 - 7 p.
- Published in : Instrum. Exp. Tech. 59 (2016) 53-59
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Comprehensive study of beam focusing by crystal devices
/ Scandale, W (CERN) ; Arduini, G (CERN) ; Cerutti, F (CERN) ; Garattini, M (CERN) ; Gilardoni, S (CERN) ; Masi, A (CERN) ; Mirarchi, D (CERN) ; Montesano, S (CERN) ; Petrucci, S (CERN) ; Redaelli, S (CERN) et al.
This paper is devoted to an experimental study of focusing and defocusing positively charged particle beams with the help of specially bent single crystals. Four crystals have been fabricated for this purpose. [...]
2018 - 11 p.
- Published in : Phys. Rev. Accel. Beams 21 (2018) 014702
Fulltext: PDF;
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