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Magnet Operations vs. HBD Meeting: Correlation Analysis and Stability Assessment

Analysis of the correlation between magnet operations and HBD trips, highlighting recent findings and stability improvements in the system. Detailed breakdown of trips in different directions and associated changes in module operations.

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Magnet Operations vs. HBD Meeting: Correlation Analysis and Stability Assessment

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  1. magnet operations vs. HBD HBD Meeting – 03/20/2007 Manuel Proissl

  2. First assumption in February verified: there is a direct correlation between magnet operation and trips in the HBD • Quick Reminder: |> 02/08/07 [+-] :: duration of ~3:30h • 14 trips in West (8 in ramp up / 0 during operation / 6 in ramp down) • 31 trips in East (15 in ramp up / 5 during operation / 11 in ramp down) |> 02/09/07 [++] :: duration of ~1:30h • 3 trips in West (1 in ramp up / 2 during operation / 0 in ramp down) • 24 trips in East (11 in ramp up / 6 during operation / 7 in ramp down) |> 03/14/07 [+-] :: duration of ~2:00h / 28 West trips, 6 East trips • 1 dI change in West (1 in ramp down) • 7 dI change in East (6 during operation / 1 in ramp down) 1

  3. 2

  4. **WN5 has been turned off after 3 trips in a row, when ramped back up to 3100V around 17:00 :: +0.4 -> +0.8 ***WS3 has been disabled on 02/07 3

  5. **@15:00 ES4 returned :: 0.0 -> +0.6 4

  6. All modules whose dI have been changed 5

  7. All modules whose dI have been changed 6

  8. Our reaction: Turning off HV during ramps (up/down) RESULTS ARE VERY PROMISING 7

  9. ** WN1 returned during operation :: +0.5 -> +0.3 ***ES2 has been disabled on 03/17 ~17:00 8

  10. comment: everything looks pretty stable!! 9

  11. *substract 2 :: these have been induced by ES2!! comment: everything looks pretty stable!! 10

  12. CONCLUSION • Overall comparison: HBD looks much more stable now! • Less trips than before. Trip/magnet correlation seemed to be vanished… NO trips after ramp up. • NO changes in the dI so far! • If CMs trip during the run, we should follow this procedure and turn the HV during ramps off. 11

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