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2019-09-21
06:01
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. [...]
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

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2019-09-21
06:01
Beam impact experiment of 440GeV/p protons on superconducting wires and tapes in a cryogenic environment / Will, Andreas (KIT, Karlsruhe ; CERN) ; Bastian, Yan (CERN) ; Bernhard, Axel (KIT, Karlsruhe) ; Bonura, Marco (U. Geneva (main)) ; Bordini, Bernardo (CERN) ; Bortot, Lorenzo (CERN) ; Favre, Mathieu (CERN) ; Lindstrom, Bjorn (CERN) ; Mentink, Matthijs (CERN) ; Monteuuis, Arnaud (CERN) et al.
The superconducting magnets used in high energy particle accelerators such as CERN’s LHC can be impacted by the circulating beam in case of specific failure cases. This leads to interaction of the beam particles with the magnet components, like the superconducting coils, directly or via secondary particle showers. [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-THPTS066 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THPTS066

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2019-09-21
06:01
Alternative proposal for FCC-hh extraction septa / Sanz Ull, Alejandro (CERN ; Eindhoven, Tech. U.) ; Atanasov, Miroslav (CERN) ; Balhan, Bruno (CERN) ; Borburgh, Jan (CERN)
Challenging requirements are set for the FCC extraction septa magnets, notably for the magnetic field level, the septum thickness and the leak field. An alternative to the baseline FCC extraction layout is proposed, consisting of a Superconducting Shield (SuShi) stage and a Truncated Cosine $\theta $ (TCT) septa stage with the aim of reducing the required number of septa and installed length. [...]
2019 - 4 p. - Published in : 10.18429/JACoW-IPAC2019-THPTS062 Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THPTS062

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2019-09-21
06:01
The use of Higgs boson production process for optimization of hadron calorimeter segmentation / Alexakhin, V Yu (Dubna, JINR) ; Andreev, V F (LPI, Moscow (main)) ; Gavrilov, V B (Moscow, ITEP) ; Golutvin, I A (Dubna, JINR) ; Tumasyan, A (Yerevan Phys. Inst.)
A new approach to the determination of the optimum transverse segmentation of the hadron calorimeter using the Higgs boson production process via the vector boson fusion mechanism is considered. Monte Carlo simulation results are presented for the hadron calorimeter which will be installed after the modernization of 2023 in the Compact Muon Superdetector collaboration at the Large Hadron Collider of the CERN..
2017 - 5 p. - Published in : Bull. Lebedev Phys. Inst.: 44 (2017) , no. 1, pp. 8-12
- Published in : Kratk Soobshch. Fiz.: 44 (2017) , no. 1, pp. 71-79

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2019-09-21
06:01
Performance evaluation of a serially powered pixel detector prototype for the HL-LHC / Gonella, L (Bonn U.) ; Filimonov, V (Bonn U.) ; Hügging, F (Bonn U.) ; Hemperek, T (Bonn U.) ; Janssen, J (Bonn U.) ; Krüger, H (Bonn U.) ; Pohl, D L (Bonn U.) ; Wermes, N (Bonn U.)
Efficient and low mass power distribution presents a challenge for vertex and tracking detectors at the HL-LHC . Different approaches have been considered to transmit power at low current and high voltage. [...]
2017 - 13 p. - Published in : JINST 12 (2017) P03004

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2019-09-21
06:01
New type of drift tubes for gas-discharge detectors operating in vacuum: Production technology and quality control / Azorskii, N I (Dubna, JINR) ; Gusakov, Yu V (Dubna, JINR) ; Elsha, V V (Dubna, JINR) ; Enik, T L (Dubna, JINR) ; Ershov, Yu V (Dubna, JINR) ; Kekelidze, V D (Dubna, JINR) ; Kislov, E M (Dubna, JINR) ; Kolesnikov, A O (Dubna, JINR) ; Madigozhin, D T (Dubna, JINR) ; Movchan, S A (Dubna, JINR) et al.
A device for fabricating thin-wall (straw) drift tubes using polyethylene terephthalate film 36 $\mu$m thick by ultrasonic welding is described together with the technique for controlling their quality. The joint width amounts to 0.4–1.0 mm. [...]
2017 - 6 p. - Published in : Phys. Part. Nucl. Lett. 14 (2017) 144-149

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2019-09-21
06:01
Active lower order mode damping for the four rod LHC crab cavity / Dexter, A C (Lancaster U. (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Burt, G (Lancaster U. (main) ; Cockcroft Inst. Accel. Sci. Tech.) ; Apsimon, R (Lancaster U. (main) ; Cockcroft Inst. Accel. Sci. Tech.)
The high luminosity upgrade planned for the LHC requires crab cavities to rotate bunches into alignment at the interaction points. They compensate for a crossing angle near 500μrad . [...]
2017 - 10 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 844 (2017) 62-71 Fulltext from publisher: PDF;

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2019-09-20
08:41
A hyperfine look at titanium dioxide / Schell, J (CERN ; Duisburg-Essen U.) ; Zyabkin, D ; Lupascu, Doru C (Duisburg-Essen U.) ; Hofsäss, Hans-Christian ; Karabasov, M O (Duisburg-Essen U.) ; Welker, A (CERN) ; Schaaf, P
2019 - 6 p. - Published in : AIP Adv. 9 (2019) 085208

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2019-09-20
08:41
Electroweak measurements at the LHC / Hamel de Monchenault, Gautier (IRFU, Saclay)
To our present knowledge, all of the physics at the LHC can be described in the framework of the Standard Model of particle physics. Indeed, the newly discovered Higgs boson with a mass close to 125 GeV seems to confirm the predictions of the theory. [...]
2017 - 26 p. - Published in : Ann. Rev. Nucl. Part. Sci. 67 (2017) 19-44

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2019-09-20
08:41
Standard Model Physics at the Large Hadron Collider (LHC) / Yoo, Hwi Dong (Seoul Natl. U.)
The Large Hadron Collider (LHC) is the most powerful hadron collider ever built and the Higgs boson, which is the last piece of the Standard Model, was discovered in 2012 using the data by the ATLAS and CMS experiments at the LHC. After the discovery, particle physicists have been conducting high precision testing of the Standard Model theory and such studies can provide indirect sensitivities to new physics. [...]
2017 - 7 p. - Published in : AAPPS Bull. 27 (2017) 4-10

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