CERN Accelerating science

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1.
New Generation CERN LHC Injection Dump - Assembly and Installation (TDIS) / Carbajo Perez, David (CERN) ; Berthomé, Emmanuel (CERN) ; Bertone, Caterina (CERN) ; Biancacci, Nicolo (CERN) ; Bracco, Chiara (CERN) ; Bregliozzi, Giuseppe (CERN) ; Bulat, Bartosz (CERN) ; Cadiou, Cyril (CERN) ; Calviani, Marco (CERN) ; Cattenoz, Gregory (CERN) et al.
During CERN’s LS2, several upgrades were performed to beam intercepting devices in the framework of the HL-LHC Project. Upgraded equipment includes two internal beam dumps (TDIS) intended for machine protection located at the injection points from the SPS to the LHC. [...]
Geneva : JACoW, 2021 - 4 p. - Published in : JACoW IPAC 2021 (2021) 3548-3551 Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.3548-3551
2.
SEE Tests With Ultra Energetic Xe Ion Beam in the CHARM Facility at CERN / Fernández-Martínez, Pablo (CERN) ; García Alía, Rubén (CERN) ; Cecchetto, Matteo (CERN) ; Kastriotou, Maria (CERN) ; Kerboub, Nourdine (CERN) ; Tali, Maris (CERN) ; Wyrwoll, Vanessa (CERN) ; Brugger, Markus (CERN) ; Cangialosi, Chiara (CERN) ; Cerutti, Francesco (CERN) et al.
Taking advantage of the heavy ion acceleration program, tests on radiation effects with Ultrahigh Energy (UHE) xenon ion beams (with Energy > 5 GeV/nucleon) have been performed in several experimental areas of the CERN accelerator complex. Specifically, the outcomes of the first UHE heavy ion test campaign carried out at the CHARM facility are presented and discussed in this contribution. [...]
2019 - 9 p. - Published in : IEEE Trans. Nucl. Sci. 66 (2019) 1523-1531
In : Conference on Radiation and its Effects on Components and Systems, Gothenburg, Sweden, 16 - 21 Sep 2018, pp.1523-1531
3.
Hot isostatic pressing assisted diffusion bonding for application to the Super Proton Synchrotron internal beam dump at CERN / Pianese, Stefano (CERN) ; Perillo-Marcone, Antonio (CERN) ; Nuiry, François-Xavier (CERN) ; Calviani, Marco (CERN) ; Szczurek, Krzysztof Adam (CERN) ; Izquierdo, Gonzalo Arnau (CERN) ; Avigni, Pietro (CERN) ; Bonnin, Simon (CERN) ; Busom Descarrega, J. (CERN) ; Feniet, Thierry (CERN) et al.
The new generation internal beam dump of the Super Proton Synchrotron (SPS) at CERN will have to dissipate approximately 270 kW of thermal power, deposited by the primary proton beam. For this purpose, it is essential that the cooling system features a very efficient heat evacuation. [...]
arXiv:2011.07942.- 2021-04-15 - 10 p. - Published in : Phys. Rev. Accel. Beams 24 (2021) 043001 Fulltext: PDF; Fulltext from Publisher: PDF; Fulltext from publisher: PDF;
4.
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
5.
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
6.
Characterisation of the radiation hardness of cryogenic bypass diodes for the HL-LHC inner triplet quadrupole circuit / Wollmann, Daniel (CERN) ; Bernhard, Axel (KIT, Karlsruhe) ; Cangialosi, Chiara (CERN) ; Cerutti, Francesco (CERN) ; D'Angelo, Giorgio (CERN) ; Danzeca, Salvatore (CERN) ; Denz, Reiner (CERN) ; Favre, Mathieu (CERN) ; Garcia Alia, Ruben (CERN) ; Hagedorn, Dietrich (CERN) et al.
The powering layout of the new HL-LHC Nb$_3$Sn triplet circuits is the use of cryogenic bypass diodes, where the diodes are located inside an extension to the magnet cryostat, operated in superfluid helium and exposed to radiation. Therefore, the radiation hardness of different type of bypass diodes has been tested at low temperatures in CERN’s CHARM irradiation facility during the operational year 2018. [...]
CERN-ACC-2019-265.- 2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-THPTS067 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THPTS067
7.
Improvements to the SPS Slow Extraction for High Intensity Operation / Balhan, Bruno (CERN) ; Bestmann, Patrick (CERN) ; Bjorkman, Daniel (CERN) ; Borburgh, Jan (CERN) ; Butcher, Mark (CERN) ; Calviani, Marco (CERN) ; Di Castro, Mario (CERN) ; Donze, Mathieu (CERN) ; Esposito, Luigi Salvatore (CERN) ; Fraser, Matthew Alexander (CERN) et al.
Slow extraction using the third-integer resonance and thin electrostatic septa as used in the SPS to serve the North Area is a process with inherent beam loss. [...]
CERN-ACC-NOTE-2019-0010 ; CERN-PBC-Notes-2021-007.
- 2019. - 87 p.
Full text
8.
Progress with Long-Range Beam-Beam Compensation Studies for High Luminosity LHC / Rossi, Adriana (CERN) ; Aberle, Oliver (CERN) ; Albertone, Joel (CERN) ; Barnyakov, Alexey (Novosibirsk, IYF) ; Bertarelli, Alessandro (CERN) ; Boccard, Christian (CERN) ; Carra, Federico (CERN) ; Cattenoz, Gregory (CERN) ; Delaup, Yorick (CERN) ; Fartoukh, Stephane (CERN) et al.
Long-range beam-beam (LRBB) interactions can be a source of emittance growth and beam losses in the LHC during physics and will become even more relevant with the smaller '* and higher bunch intensities foreseen for the High Luminosity LHC upgrade (HL-LHC), in particular if operated without crab cavities. Both beam losses and emittance growth could be mitigated by compensat-ing the non-linear LRBB kick with a correctly placed current carrying wire. [...]
CERN-ACC-2017-158.- 2017 - 4 p. - Published in : 10.18429/JACoW-IPAC2017-TUPVA115 Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.TUPVA115

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10 Lendaro, J
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