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CERN Yellow Report Articles

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2021-06-18
06:16
Simulating radiation effects and signal response in silicon sensors / Bomben, M (ed.) (Paris U., VI-VII) ; Sonneveld, J (ed.) (Nikhef, Amsterdam) ; Benoit, M (RIKEN BNL) ; Chabert, E (Strasbourg, IPHC) ; Lari, T (INFN, Milan) ; Llorente Merino, J (Simon Fraser U.) ; Nachman, B (LBNL, Berkeley) ; Rossini, L (INFN, Milan ; Milan U.) ; Sabatini, P (Valencia U., IFIC) ; Suarez, C (Johns Hopkins U.) et al.
Simulating the effects of radiation on signal response in silicon sensors is crucial for accurately predicting detector performance throughout the lifetime of the experiment. This, in turn, improves the reconstruction accuracy of proton–proton collisions and helps maintain the experiment’s physics reach. [...]
2021 - 23 p. - Published in : 10.23731/CYRM-2021-001.123 Fulltext: 123.PDF;
In : Radiation effects in the LHC experiments: Impact on detector performance and operation, pp.123-145

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2021-06-18
06:16
Impact of radiation on electronics and opto-electronics / Bindi, M (ed.) (Gottingen U.) ; Butz, E (ed.) (KIT, Karlsruhe) ; Backhaus, M (ETH, Zurich (main)) ; Butti, P (SLAC) ; Chabert, E (Strasbourg, IPHC) ; Chen, S (Pennsylvania U.) ; Dickinson, J (Fermilab) ; Erdmann, W (PSI, Villigen) ; Pascual, J Garcia (Beijing, Inst. High Energy Phys.) ; Gerosa, R (UC, San Diego) et al.
In this chapter we will present the results of the impact of radiation on electronics and opto-electronics for two of the LHC experiments during Run 1 and Run 2. ATLAS results are presented in Section 6.1; CMS in Section 6.2. [...]
2021 - 35 p. - Published in : 10.23731/CYRM-2021-001.87 Fulltext: PDF;
In : Radiation effects in the LHC experiments: Impact on detector performance and operation, pp.87-121

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2021-06-18
06:16
Measurements of radiation damage on silicon sensors / De Cosa, A (ed.) (ETH, Zurich (main)) ; Nachman, B (ed.) (LBNL, Berkeley) ; Collins, P (ed.) (CERN) ; Agram, J L (Strasbourg, IPHC) ; Barter, W (Imperial Coll., London) ; Baselga, M (KIT, Karlsruhe) ; Battaglia, M (UC, Santa Cruz) ; Beyer, J (LMU Munich (main)) ; Borecka-Bielska, H M (U. Liverpool (main)) ; Brzhechko, D (Zurich U.) et al.
This chapter is organized as follows. Section 5.1 introduces, for each experiment, aspects of the detector set-up and measurement methods particularly relevant for the measurements. [...]
2021 - 27 p. - Published in : 10.23731/CYRM-2021-001.59 Fulltext: PDF;
In : Radiation effects in the LHC experiments: Impact on detector performance and operation, pp.59-85

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2021-06-18
06:16
Simulation of radiation environments / Alici, A (Queen Mary, U. of London (main)) ; Azhgirey, I (Serpukhov, IHEP) ; Dawson, I (Queen Mary, U. of London (main)) ; Huhtinen, M (CERN) ; Ivantchenko, V (Tomsk State U.) ; Kar, D (Witwatersrand U.) ; Karacson, M (CERN) ; Mallows, S (KIT, Karlsruhe) ; Manousos, T (CERN) ; Mandić, I (Stefan Inst., Ljubljana) et al.
Simulating radiation environments is crucial in the design phase of new hadron collider experiments or upgrades, especially when extrapolating to new centre of mass collision energies where previous experience cannot be relied on. The generation of radiation fields in the LHC experiments is dominated by proton–proton collisions, with contributions from beam-gas interactions and other machine losses. [...]
2021 - 24 p. - Published in : 10.23731/CYRM-2021-001.35 Fulltext: PDF;
In : Radiation effects in the LHC experiments: Impact on detector performance and operation, pp.35-58

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2021-06-18
06:16
The LHC machine and experiments / Alici, A (Bologna U.) ; Bomben, M (Paris U., VI-VII) ; Dawson, I (Queen Mary, U. of London) ; Sonneveld, J (Nikhef, Amsterdam)
The Large Hadron Collider is a 26.7 km circular accelerator based on a twin aperture superconducting magnet design with a design proton beam energy of 7 TeV. The four particle physics experiments ALICE, ATLAS, CMS, and LHCb are located around the ring. [...]
Geneva : CERN, 2021 - 12 p. - Published in : 10.23731/CYRM-2021-001.23 Fulltext: PDF;
In : Radiation effects in the LHC experiments: Impact on detector performance and operation, pp.23-34

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2021-06-18
06:16
Overview of radiation effects on detector systems / Dawson, I (Queen Mary, U. of London) ; Faccio, F (CERN) ; Moll, M (CERN) ; Weidberg, A (Oxford U.)
In this section we give an overview of the effects of radiation on silicon detector systems in the LHC experiments. We divide the sections into: sensors; electronics; optoelectronics; services. [...]
2021 - 19 p. - Published in : 10.23731/CYRM-2021-001.3 Fulltext: 3.PDF;
In : Radiation effects in the LHC experiments: Impact on detector performance and operation, pp.3-21

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2021-02-23
06:23
Status of negative momentum compaction operation at KARA / Schreiber, P (KIT, Karlsruhe) ; Boltz, T (KIT, Karlsruhe) ; Brosi, M (KIT, Karlsruhe) ; Haerer, B (KIT, Karlsruhe) ; Mochihashi, A (KIT, Karlsruhe) ; Papash, A I (KIT, Karlsruhe) ; Schuh, M (KIT, Karlsruhe) ; Müller, A -S (KIT, Karlsruhe)
For future synchrotron light sources different operation modes are of interest. Therefore various modes are currently being tested at the Karlsruhe Research Accelerator (KARA) including optics for a negative momentum compaction factor. [...]
2020 - 3 p. - Published in : 10.23732/CYRCP-2020-009.297 Fulltext: PDF;
In : ICFA mini-Workshop on Mitigation of Coherent Beam Instabilities in Particle Accelerators (MCBI 2019), Zermatt, Switzerland, 23 - 27 Sep 2019, pp.297-299 (CERN-2020-009)

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2021-02-20
06:37
Incoherent electron cloud effects in the Large Hadron Collider / Paraschou, K (CERN ; Aristotle U., Thessaloniki) ; Iadarola, G (CERN)
During the operation of the Large Hadron Collider in 2018, the majority of physics data was collected with a beam energy of 6.5 TeV, a bunch spacing of 25 ns and with β-functions in the high luminosity interaction points equal to 30 cm. In this configuration, it was found through several experimental measurements that electron cloud induces a significant degradation of the beam lifetime. [...]
2020 - 7 p. - Published in : 10.23732/CYRCP-2020-009.249 Fulltext: PDF;
In : ICFA mini-Workshop on Mitigation of Coherent Beam Instabilities in Particle Accelerators (MCBI 2019), Zermatt, Switzerland, 23 - 27 Sep 2019, pp.249-255 (CERN-2020-009)

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2021-02-20
06:37
Mitigation of the impedance-related collective effects in FCC-ee / Zobov, Mikhail (Frascati) ; Belli, E (CERN) ; Kersevan, Roberto (CERN) ; Novokhatski, A (SLAC) ; Zadeh, S G (Rostock U.) ; Migliorati, Mauro (Rome U.)
In order to achieve a high luminosity in the electron-positron Future Circular Collider (FCC-ee), very intense multi-bunch beams with low emittances are accumulated in two separate rings and collide in two interaction regions exploiting the crab waist collision scheme. In order to preserve beam quality and to avoid collider performance degradation a careful study of beam collective effects is required. [...]
2020 - 7 p. - Published in : 10.23732/CYRCP-2020-009.279 Fulltext: PDF;
In : ICFA mini-Workshop on Mitigation of Coherent Beam Instabilities in Particle Accelerators (MCBI 2019), Zermatt, Switzerland, 23 - 27 Sep 2019, pp.279-285 (CERN-2020-009)

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2021-02-20
06:37
Implementation of transverse dampers in beam stability analyses / Li, K (CERN) ; Komppula, J (CERN)
Collective effects in high intensity, high energy particle accelerators and colliders are becoming increasingly important as performance is continuously pushed to the limits. The mitigation of collective effects, in particular coherent beam instabilities, relies heavily on transverse feedback systems. [...]
2020 - 5 p. - Published in : 10.23732/CYRCP-2020-009.211 Fulltext: PDF;
In : ICFA mini-Workshop on Mitigation of Coherent Beam Instabilities in Particle Accelerators (MCBI 2019), Zermatt, Switzerland, 23 - 27 Sep 2019, pp.211-215 (CERN-2020-009)

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