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RB45 - provoked quench at 9.5 kA

RB45 - provoked quench at 9.5 kA. Quench provoked in B17R4 4 magnets quenched after quench propagation Sequence of events:. RB45 - provoked quench at 9.5 kA Temperature profiles:. RB45 - provoked quench at 9.5 kA Quench Detection. RB45 - provoked quench at 9.5 kA Quench Detection.

josiah-mills
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RB45 - provoked quench at 9.5 kA

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  1. RB45 - provoked quench at 9.5 kA • Quench provoked in B17R4 • 4 magnets quenched after quench propagation • Sequence of events:

  2. RB45 - provoked quench at 9.5 kATemperature profiles:

  3. RB45 - provoked quench at 9.5 kAQuench Detection

  4. RB45 - provoked quench at 9.5 kA Quench Detection • Quench detection performed very well

  5. RB45 - provoked quench at 9.5 kA Magnet Protection • All quench heaters were fired correctly

  6. RB45 - provoked quench at 9.5 kA

  7. RB45 - provoked quench at 9.5 kA

  8. RB45 – first training quench at 9789 A • Natural quench in C27L5 • 3 magnets quenched (2 after quench propagation) • Sequence of events:

  9. First training quench in RB45Current decay

  10. First training quench in RB45 Quench DetectionCurrent decay

  11. First training quench in RB45 Temperatures:

  12. First training quench in RB45 Temperatures:

  13. First training quench in RB45 Pressure build-up:

  14. First training quench in RB45 Pressure discharge:

  15. First training quench in RB45 Trying to recover….

  16. First training quench in RB45

  17. RB45 – second training quench at 9859 A • Natural quench in A22R4 • 3 magnets quenched (2 after quench propagation) • Sequence of events:

  18. RB45 – second training quench at 9859 A ~ 4m 51s

  19. RB45 – second training quench at 9859 A 20 ms to reach voltage threshold 230 ms to reach voltage threshold 700 ms to reach voltage threshold >1 s to reach voltage threshold

  20. RB45 – second training quench at 9859 A

  21. First conclusions • During the first three high current quenches performed in RB45 all individual systems performed very well. • During the first two quenches (9500 A and 9789 A) the quench propagation between “A” and “B” magnets was observed to be unexpectedly fast. • During the last high current quench (9859 A) a “good” magnet quenched. Is this worrying? We’ll see with the next one……

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