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Operational performance of crystal collimation with 6.37 $Z$ TeV Pb ion beams at the LHC
/ D'Andrea, M (CERN) ; Aberle, O (CERN) ; Bruce, R (CERN) ; Butcher, M (CERN) ; Di Castro, M (CERN) ; Cai, R (CERN) ; Lamas, I (CERN) ; Masi, A (CERN) ; Mirarchi, D (CERN) ; Redaelli, S (CERN) et al.
The concept of crystal collimation relies on the use of bent crystals to coherently deflect positively charged particles with suitable impact conditions by trapping them in the potential well generated by adjacent crystalline planes. The resulting deflection is much higher than what can be achieved by multiple scattering on amorphous materials. [...]
2024 - 16 p.
- Published in : Phys. Rev. Accel. Beams 27 (2024) 011002
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First Experience of Crystal Collimators During LHC Special Runs and Plans for the Future
/ D'Andrea, Marco (CERN ; U. Padua (main)) ; Avati, Valentina (CERN ; AGH-UST, Cracow) ; Bruce, Roderik (CERN) ; Butcher, Mark (CERN) ; Deile, Mario (CERN) ; Di Castro, Mario (CERN) ; Dziedzic, Bartosz (Cracow, INP) ; Garcia Morales, Hector (CERN ; Royal Holloway, U. of London) ; Gavrikov, Yury (St. Petersburg, INP ; CERN) ; Hiller, Karlheinz (DESY, Zeuthen) et al.
Bent crystals can deflect charged particles by trapping them within the potential well generated by neighboring crystalline planes and forcing them to follow the curvature of the crystal itself. This property has been extensively studied over the past decade at the CERN accelerator complex, as well as in other laboratories, for a variety of applications, ranging from beam collimation to beam extraction and in-beam fixed target experiments. [...]
2022 - 6 p.
- Published in : JACoW HB 2021 (2022) 12-17
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In : 64th ICFA Advanced Beam Dynamics Workshop on High Intensity and High Brightness Hadron Beams (HB 2021), Batavia, Illinois, United States, 4 - 9 Oct 2021, pp.12-17
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Detailed Electromagnetic Characterisation of HL-LHC Low Impedance Collimators
/ Kurtulus, Adnan (CERN ; ETH, Zurich (main)) ; Accentura, Carlotta (CERN) ; Biancacci, Nicolo (CERN) ; Carra, Federico (CERN) ; Caspers, Fritz (CERN) ; Chitnis, Ninad (CERN) ; Giordano, Francesco (CERN) ; Illan Fiastre, Ricardo (CERN) ; Joly, Sébastien (CERN) ; Lamas Garcia, Inigo (CERN) et al.
The High Luminosity Large Hadron Collider (HL-LHC) project will upgrade the LHC machine to allow operation with increased luminosity for the experiments. In order to achieve this goal, different operational parameters of the machine need to be pushed beyond the present design values, including the stored beam energy. [...]
Geneva : JACoW, 2021 - 4 p.
- Published in : JACoW IPAC 2021 (2021) 4258-4261
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In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.4258-4261
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Crystal Collimation of 20 MJ Heavy-Ion Beams at the HL-LHC
/ D'Andrea, Marco (CERN) ; Bruce, Roderik (CERN) ; Di Castro, Mario (CERN) ; Galluccio, Francesca (INFN, Naples) ; Lamas Garcia, Inigo (CERN) ; Masi, Alessandro (CERN) ; Mirarchi, Daniele (CERN) ; Nevay, Laurence (Royal Holloway, U. of London ; CERN) ; Redaelli, Stefano (CERN) ; Rossi, Roberto (CERN) et al.
The concept of crystal collimation at the Large Hadron Collider (LHC) relies on the use of bent crystals that can deflect halo particles by a much larger angle than the standard multi-stage collimation system. Following an extensive campaign of studies and performance validations, a number of crystal collimation tests with Pb ion beams were performed in 2018 at energies up to 6.37 Z TeV. [...]
2021 - 4 p.
- Published in : 10.18429/JACoW-IPAC2021-WEPAB023
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In : 12th International Particle Accelerator Conference (IPAC 2021), Online, Br, 24 - 28 May 2021, pp.2644-2647
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MD2193 – Impedance Measurements of the TCSPM Prototype Collimator
/ Amorim, David (Universite Grenoble-Alpes (FR)) ; Antipov, Sergey ; Arsenyev, Sergey ; Azzopardi, Gabriella (CERN) ; Biancacci, Nicolo (CERN) ; Bruce, Roderik (CERN) ; Carver, Lee Robert (University of Liverpool (GB)) ; Fitterer, Miriam ; Giordano, Francesco (Universita e sezione INFN di Napoli (IT)) ; Lamas Garcia, Inigo et al.
In view of the HL–LHC project, it is planned to exchange 9 out 11 of the LHC secondary collimators in IR7, made of graphite, with low–impedance ones. [...]
CERN-ACC-NOTE-2021-0021.
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2021. - 17 p.
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Electromagnetic characterization of the crystal primary collimators for the HL-LHC
/ Quartullo, D (Rome U. ; INFN, Rome) ; Arpaia, P (Naples U.) ; Biancacci, N (CERN) ; Giordano, F (CERN ; Naples U.) ; Lamas Garcia, I (CERN) ; Mostacci, A (Rome U. ; INFN, Rome) ; Palumbo, L (Rome U.) ; Redaelli, S (CERN) ; Salvant, B (CERN) ; Teofili, L (CERN) et al.
The crystal-based primary collimators installed in the Large Hadron Collider (LHC) at CERN use the channelling process in bent crystals to steer halo particles efficiently onto downstream collimators. This scheme, called crystal collimation, is also considered for applications of fixed-target implementations in the context of the Physics Beyond Collider at the LHC. [...]
2021 - 18 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1010 (2021) 165465
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Wake-function, impedance, and energy loss determination for two countermoving particle beams
/ Teofili, L (U. Rome La Sapienza (main) ; INFN, Rome ; CERN) ; Arpaia, P (Naples U. ; CERN) ; Giordano, F (Naples U. ; CERN) ; Lamas, I (CERN) ; Rumolo, G (CERN) ; Salvant, B (CERN) ; Zannini, C (CERN) ; Migliorati, M (U. Rome La Sapienza (main) ; INFN, Rome)
This paper deals with the determination of the wake-function, impedance and energy loss due to surrounding accelerator components of two countermoving beams, i.e., two beams moving in opposite directions. Differently from the classical case, the distance between source and test charges cannot be considered constant. [...]
2021 - 19 p.
- Published in : Phys. Rev. Accel. Beams 24 (2021) 041001
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Wakefield of two counter-rotating beams
/ Teofili, L (CERN ; INFN, Rome ; U. Rome La Sapienza (main)) ; Migliorati, M (CERN ; INFN, Rome ; U. Rome La Sapienza (main)) ; Lamas, I (CERN)
This paper deals with the problem of defining the wakefunction for two counter-moving charges, i.e. two charges moving in opposite direction. [...]
2020 - 7 p.
- Published in : 10.23732/CYRCP-2020-009.340
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In : ICFA mini-Workshop on Mitigation of Coherent Beam Instabilities in Particle Accelerators (MCBI 2019), Zermatt, Switzerland, 23 - 27 Sep 2019, pp.340 (CERN-2020-009)
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Reducing Beam-Related Background on Forward Physics Detectors Using Crystal Collimation at the Large Hadron Collider
/ Mirarchi, D (Manchester U. ; CERN) ; Avati, V (AGH-UST, Cracow ; CERN) ; Bruce, R (CERN) ; Butcher, M (CERN) ; D'Andrea, M (CERN ; U. Padua (main)) ; Di Castro, M (CERN) ; Deile, M (CERN) ; Dziedzic, B (Cracow, INP) ; Hiller, K (DESY) ; Jakobsen, S (CERN) et al.
Beam collimation in high-energy colliders is customarily carried out by means of massive amorphous absorbers surrounding the circulating beam. Several studies were performed in the last decades to establish an innovative collimation technique that relies on particle deflection by means of channeling between crystalline planes of a bent crystal. [...]
2020 - 20 p.
- Published in : Phys. Rev. Applied 14 (2020) 064066
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Feasibility Study for NITE SiC/SiC as the Target Material for Pions/Muons Production at High-Power Proton Accelerator Facilities
/ Makimura, Shunsuke (J-PARC) ; Park, Joon-Soo (Muroran Inst. Tech.) ; Sato, Akira (Osaka U. (main)) ; Matoba, Shiro (J-PARC) ; Kawamura, Naritoshi (J-PARC) ; Yamazaki, Takayuki (J-PARC) ; Ninomiya, Kazuhiko (Osaka U. (main)) ; Tomono, Dai (Osaka U., Res. Ctr. Nucl. Phys.) ; Nakazato, Naofumi (Muroran Inst. Tech.) ; Calviani, Marco (CERN) et al.
The feasibility study for Nano-Infiltration and Transient Eutectic phase process SiC/SiC (NITE SiC/SiC)NITE SiC/SiC as a potential novel target material for pions/muons production at high-power proton accelerators facilities is in progress. Compared with graphite that is the principal target material for pions/muons production, higher transport efficiency and higher oxidation resistance can be expected. [...]
2020 - 6 p.
- Published in : JPS Conf. Proc. 28 (2020) 031005
Fulltext: PDF;
In : 14th International Workshop on Spallation Materials Technology, Fukushima, Japan, 11 - 17 Nov 2018, pp.031005
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