Difference between revisions of "PITMinutes 03-11-2019"
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== Attendance == | == Attendance == | ||
| − | + | A. Freyberger, R. Geng, C. Hotaver, G. Krafft, A. Kimber, R. Legg, F. Marhauser, R. Michaud, R. Nelson, T. Plawski, T. Powers, B. Rimmer, C. Reece, T. Reilly, A. Solopova, and H. Wang. | |
== Agenda and Notes == | == Agenda and Notes == | ||
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1. Operations Status and Summary/Review (Freyberger) | 1. Operations Status and Summary/Review (Freyberger) | ||
| − | + | Notable event during OPS last week. Net result is gradients in two modules | |
| − | + | turned back to below onset of FE. Question to be discussed is whether | |
| − | + | all should get similar treatment? More neutron detectors ordered. | |
| − | + | Do measurements during the summer? | |
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| − | + | Pre-cursors | |
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| − | + | Mounts/Powers observed many quench faults in 1L25-8 that are not quenches but are ???? | |
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| − | + | 1L25 and 1L26 thermal cycled to 30 K in Jan. Modest Help? | |
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| + | Event Description | ||
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| + | Vaccum degrades | ||
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| + | 1L25-8 becomes Unstable | ||
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| + | valve fails | ||
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| + | 1L25-8 by-passed not recoverable | ||
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| + | gradient loss in 1L25-7 | ||
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| + | Recovery | ||
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| + | Neutron detectors used to find new 1L25 and 1L26 gradients | ||
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| + | 20+ MeV energy loss in 1L25 | ||
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| + | 8 MeV energy loss in 1L26 | ||
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| + | Warm region vacuum almost back to nominal | ||
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| + | Scaled back to 1000 in the NLINAC, | ||
| + | 1020 in the SLINAC | ||
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| + | New neutron detectors placed below both 1L25 and 1L26 | ||
| + | Tune gradient to no neutrons detected. | ||
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| + | |||
| + | 2. Cryomodule Shuffle ???? | ||
3. Plasma Cleaning (Powers) | 3. Plasma Cleaning (Powers) | ||
Latest revision as of 16:41, 25 March 2019
Attendance
A. Freyberger, R. Geng, C. Hotaver, G. Krafft, A. Kimber, R. Legg, F. Marhauser, R. Michaud, R. Nelson, T. Plawski, T. Powers, B. Rimmer, C. Reece, T. Reilly, A. Solopova, and H. Wang.
Agenda and Notes
1. Operations Status and Summary/Review (Freyberger)
Notable event during OPS last week. Net result is gradients in two modules turned back to below onset of FE. Question to be discussed is whether all should get similar treatment? More neutron detectors ordered. Do measurements during the summer?
Pre-cursors
Mounts/Powers observed many quench faults in 1L25-8 that are not quenches but are ????
1L25 and 1L26 thermal cycled to 30 K in Jan. Modest Help?
Event Description
Vaccum degrades
1L25-8 becomes Unstable
valve fails
1L25-8 by-passed not recoverable
gradient loss in 1L25-7
Recovery
Neutron detectors used to find new 1L25 and 1L26 gradients
20+ MeV energy loss in 1L25
8 MeV energy loss in 1L26
Warm region vacuum almost back to nominal
Scaled back to 1000 in the NLINAC, 1020 in the SLINAC
New neutron detectors placed below both 1L25 and 1L26 Tune gradient to no neutrons detected.
2. Cryomodule Shuffle ????
3. Plasma Cleaning (Powers)
Funding approved
Action Items
Leadership of quenches. Offline discussion.
C100 Refurbishment Project for the future?
