Characterization of NbTi Busbar for HL-LHC Interaction Region Quadrupoles
| Autor: | R. Bossert, Sandor Feher, D.F. Orris, Maria Baldini, Stoyan Stoynev, Heng Pan, Guram Chlachidze, Vittorio Marinozzi, Giorgio Ambrosio |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Large Hadron Collider Busbar High Luminosity Large Hadron Collider Niobium-titanium Superconducting magnet Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Nuclear physics Magnet 0103 physical sciences Physics::Accelerator Physics Fermilab Electrical and Electronic Engineering 010306 general physics Quadrupole magnet |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 30:1-5 |
| ISSN: | 2378-7074 1051-8223 |
| Popis: | The US Accelerator Upgrade for the HiLumi-LHC (US-HL-LHC AUP) project and CERN are designing and fabricating superconducting quadrupole magnets for the interaction regions of the High Luminosity Large Hadron Collider (HL-LHC). The triplet is made of three optical elements: Q1, Q2, and Q3. The Nb3Sn quadrupole magnets operate in superfluid He at 1.9 K with a nominal field gradient of 132.6 T/m. The three inner triplet elements are connected together with superconducting buses. The design and fabrication of the through and local buses is carried out at Applied Physics and Superconducting Technology Division (APS-TD) at Fermilab (FNAL). This paper reports the characterization of the bus-bar thermo-electric properties. The bus was tested with a short Nb3Sn magnet (MQXFS1e) in the vertical test facility of the APS-TD at FNAL. The test demonstrated that the bus design is adequate since no spontaneous quench took place up to 17.89 kA current value. Quench propagation velocities were investigated over a range of currents that is typical for accelerator superconducting magnets. Temperature margins were found above that required for the Hi-Lumi triplet bus. The design guarantees the protection of the bus at operational current value according to the quench detection voltage threshold (100 mV) established for the Hi-Lumi LHC interaction region. |
| Databáze: | OpenAIRE |
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