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Test Results of the...
Test Results of the CERN HL-LHC Low-beta Quadrupole Short Models MQXFS3c and MQXFS4
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- Mangiarotti, Franco (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Bajas, Hugues (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Ambrosio, Giorgio (författare)
- FNAL, POB 500, Batavia, IL 60510 USA
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- Bajko, Marta (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Bordini, Bernardo (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Bourcey, Nicolas (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Duda, Michal (författare)
- CERN, CH-1211 Geneva, Switzerland;IFJ PAN, PL-31342 Krakow, Poland
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- Desbiolles, Vincent (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Feuvrier, Jerome (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Fleiter, Jerome (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Bermudez, Susana Izquierdo (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Chiuchiolo, Antonella (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Devred, Arnaud (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Ferracin, Paolo (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Fiscarelli, Lucio (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Mentink, Matthias (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Nobrega, Alfred (författare)
- FNAL, POB 500, Batavia, IL 60510 USA
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- Pepitone, Kevin (författare)
- Uppsala universitet,FREIA
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- Ravaioli, Emmanuele (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Schmalzle, Jesse (författare)
- BNL, Upton, NY 11973 USA
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- Todesco, Ezio (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Perez, Juan Carlos (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Vallone, Giorgio (författare)
- LBL, Berkeley, CA 94720 USA
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- Willering, Gerard (författare)
- CERN, CH-1211 Geneva, Switzerland
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- Yu, Miao (författare)
- FNAL, POB 500, Batavia, IL 60510 USA
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(creator_code:org_t)
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2019
- 2019
- Engelska.
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Ingår i: IEEE transactions on applied superconductivity (Print). - : IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. - 1051-8223 .- 1558-2515. ; 29:5
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- For the high luminosity upgrade of the CERN large hadron collider, lower beta* quadrupole magnets based on advanced Nb3Sn conductors will be installed on each side of the ATLAS and compact muon solenoid (CMS) experiment insertion zones. As part of the technological developments needed to achieve the required field gradient of 132.6 T/m within a 150-mm aperture, short length model magnets, named MQXFS, are tested both at the CERN SM18 and Fermilab test facilities. The model magnets rely on two types of Nb3Sn conductors (restack rod process (RRP) and powderin-tube (PIT)) and on an innovative bladders and keys design to provide mechanical support against the Lorentz forces. In 2016 and 2017, the powering tests of the first two models MQXFS3 (RRP) and MQXFS5 (PIT) proved that nominal performance (16.5 kA) could be reached with excellent memory of the quench current after thermal cycle. However both magnets showed a slow training behavior with clear observations of voltage disturbances before the quench. Besides, only MQXFS5 could reach ultimate current (17.9 kA) whereas erratic behavior was observed on MQXFS3 due to conductor local degradation at the head of one of the coils. In 2018, this limiting coil was changed and the applied azimuthal prestress increased. While ultimate current could then be reached, no stable current could be maintained due to identified defect on the outer layer of the new coil. Finally the outcome of the test of the new model MQXFS4, featuring the final RRP conductors that will be used for the series production and variation on the inner layer quench heater designs are here reported in details.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Nyckelord
- Nb3Sn
- low beta quadrupole
- quench
- superconducting magnets
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Mangiarotti, Fra ...
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Bajas, Hugues
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Ambrosio, Giorgi ...
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Bajko, Marta
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Bordini, Bernard ...
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Bourcey, Nicolas
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Duda, Michal
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Desbiolles, Vinc ...
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Feuvrier, Jerome
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Fleiter, Jerome
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Bermudez, Susana ...
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Chiuchiolo, Anto ...
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Devred, Arnaud
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Ferracin, Paolo
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Fiscarelli, Luci ...
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Mentink, Matthia ...
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Nobrega, Alfred
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Pepitone, Kevin
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Ravaioli, Emmanu ...
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Schmalzle, Jesse
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Todesco, Ezio
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Perez, Juan Carl ...
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Vallone, Giorgio
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Willering, Gerar ...
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Yu, Miao
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