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An Inertial Uni-Axial Interferometer-Based Accelerometer for Harsh Environments
/ Aliana Cervera, Gerard (CERN ; Ecole Polytechnique, Lausanne) ; Solis Paiva, Santiago Andres (CERN) ; Serrano Galvez, Pablo (CERN) ; Sola Merino, Jorge (CERN) ; Butcher, Mark (CERN) ; Matheson, Eloise (CERN) ; di Castro, Mario (CERN)
For high-impact devices, subsequent vibrations
have as much influence on the deterioration of the mechanical
structure as the impact itself. To mitigate the consequences
of both impacts and resulting vibrations, it is crucial to
accurately understand the peak acceleration and vibration
frequencies that originate in the structure. [...]
2022 - 10 p.
- Published in : IEEE Sensors J. 22 (2022) 21540-21549
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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
Fulltext: PDF;
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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PRACTICAL CHALLENGES OF THE LHC MAIN BEAM DUMP UPGRADES
/ Martin Ruiz, Jose Maria (CERN) ; Kershaw, Keith (CERN) ; Calviani, Marco (CERN) ; Grenier, Damien (CERN) ; Maestre Heredia, Jorge ; Torregrosa Martin, Claudio Leopoldo (Universidad de Oviedo (ES)) ; Buonocore, Luca Rosario (CERN) ; Serrano Galvez, Pablo ; Matheson, Eloise (CERN) ; Sola Merino, Jorge et al.
The two Large Hadron Collider (LHC) beam dumps have to withstand arduous operating conditions and are essential for the safe and reliable operation of the collider. [...]
CERN-ACC-NOTE-2021-0027.
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2021. - 8 p.
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First observation of ion beam channeling in bent crystals at multi-TeV energies
/ Redaelli, S (CERN) ; Butcher, M (CERN) ; Barreto, C (CERN) ; Losito, R (CERN) ; Masi, A (CERN) ; Mirarchi, D (CERN) ; Montesano, S (CERN) ; Rossi, R (CERN ; INFN, Rome ; Rome U.) ; Scandale, W (CERN) ; Serrano Galvez, P (CERN) et al.
Planar channeling in bent crystals has been observed in LHC with multi-TeV proton beam in 2015. Two crystals, mounted on novel high-accuracy goniometers (one in the horizontal and one in the vertical plane), are integrated in the LHC collimation system, for studying the feasibility of the crystal-based collimation scheme. [...]
2021 - 7 p.
- Published in : Eur. Phys. J. C 81 (2021) 142
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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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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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Crystal Collimation Tests with Pb Ion Beams
/ D'Andrea, Marco (Universita e INFN, Padova (IT)) ; Mirarchi, Daniele (University of Manchester (GB)) ; Redaelli, Stefano (CERN) ; Fomin, Alex (NSC Kharkiv Institute of Physics and Technology (UA)) ; Belli, Eleonora (CERN) ; Salvachua Ferrando, Belen Maria (CERN) ; Nevay, Laurence James (University of London (GB)) ; Rossi, Roberto (Sapienza Universita e INFN, Roma I (IT)) ; Scandale, Walter (CERN) ; Montesano, Simone (Universita e INFN, Bologna (IT)) et al.
During MD4168, performed on November 27th 2018, silicon crystals for a crystal-assisted collimation system were tested. [...]
CERN-ACC-NOTE-2019-0024.
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2019.
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