| Title | Superconducting Magnet Power Supply and Hard Wired Quench Protection at Jefferson Lab for 12 GeV Upgrade |
| Authors | Probir Ghoshal, Ramakrishna Bachimanchi, Ruben Fair, M. Gelhaar, Onish Kumar, Sarin Philip, Mark Todd |
| JLAB number | JLAB-ACE-17-2458 |
| LANL number | (None) |
| Other number | DOE/OR/23177-4131 |
| Document Type(s) | (Journal Article) |
| Associated with EIC: | No |
| Supported by Jefferson Lab LDRD Funding: | No |
| Funding Source: | Nuclear Physics (NP) |
| Citation (AIP): |
Ghoshal, P. et. al., IEEE Transactions in Applied Superconductivity 27 (8) 1-6 (2017). |
| Publication Abstract: | The superconducting magnet system in Hall B being designed and built as part of the Jefferson Lab 12 GeV upgrade requires powering two conduction cooled superconducting magnets ? a torus and a solenoid. The torus magnet is designed to operate at 3770 A and solenoid at 2416 A. Failure Modes and Effects Analysis (FMEA) determined that voltage level thresholds and dump switch operation for magnet protection should be tested and analyzed before incorporation into the system. The designs of the quench protection and voltage tap sub-systems were driven by the requirement to use a primary hard-wired quench detection sub-system together with a secondary PLC-based protection. Parallel path voltage taps feed both the primary and secondary quench protection sub-systems. The PLC based secondary protection is deployed as a backup for the hard-wired quench detection sub-system and also acts directly on the dump switch. We describe a series of tests and modifications carried out on the magnet power supply and quench protection system to ensure that the superconducting magnet is protected for all fault scenarios. |
| Experiment Numbers: | |
| Group: | Physics Magnet |
| Document: | pdf |
| DOI: | http://doi.org/10.1109/TASC.2017.2759280 |
| Accepted Manuscript: | ghoshal-IEEE.pdf embargoed final, peer reviewed, accepted manuscript |
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