Difference between revisions of "PITMinutes 08-10-2020"

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(Created page with "== Attendance == K. Baggett, J. Benesch, M. Bickley, T. Carlino, G. Ciovati, J. Creel, E. Daly, K. Davis, M. Drury, C. Hovater, N. Huque, F. Humphrey, T. Ganey, C. Ginsburg,...")
 
(→‎Agenda and Notes)
 
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== Agenda and Notes ==
 
== Agenda and Notes ==
  
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1. Operations Status and Summary/Review (Bickley/Drury)
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1. Operations Status and Summary/Review (Bickley/Powers)
  
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Action items:[1] Continue analysis of two hour pressure spikes
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Resume every other week meeting on
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and check module stability after problem solved.
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RF/SRF issues.
  
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Pressure spikes solved. Control valve convection heat
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Quenches observed in 2L26-8 over weekend.
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leak. Now have the value held open and seems to have
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Hard quenches indicated from analysis of
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been solution.
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field data.
  
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[2] Increase Q_ext to allow higher operating gradient
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Not able to recover cavity, even at low gradient
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in 4 cavities
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without high heat load?
  
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3 of 4 were adjusted up. CED updated. Fourth could not
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Correlation with end of Linac and
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be adjusted. Couple MeV increase in linac gradient
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Differential pumping posited and discussed.
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[3] Turn on 1L08 1, in particular cavity one at
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low gradient. Hold field at low set point to avoid
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uncontrolled gradient in cavity (cannot be detuned
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away from fundamental frequency)
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Cards changed out unstuck the tuner. So now cavity
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can be operated. 6 or so MeV.
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[4] 0L03-4 stuck tuned. Working on chassis to get
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fixed. Tuning card also had an issue, to be replace
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next maintenance.
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[5] Presently  9 cavities in north
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and 4 plus module 2L03 in south hard down.
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[6] Heat load down and seems to be under control.
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[7] Lemming to 1031 on both sides and will not have
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to run asymetrically.
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2. Plasma Processing Update (Powers)
 
2. Plasma Processing Update (Powers)
  
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Resume every other week meeting on
 
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RF/SRF issues.
 
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Focus on OPS issues near term;
 
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get back to long term focus in
 
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longer term.
 
  
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Charlie's SRF link to description slide.
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[https://casa.jlab.org/LINACPIT/RF_PIT_meeting_10_Aug_2020.pptx Status of Work on Plasma Processing]
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Marhauser talk link
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3. Progress on Particle Counter (Geng/Spata)
 
3. Progress on Particle Counter (Geng/Spata)

Latest revision as of 09:57, 11 August 2020

Attendance

K. Baggett, J. Benesch, M. Bickley, T. Carlino, G. Ciovati, J. Creel, E. Daly, K. Davis, M. Drury, C. Hovater, N. Huque, F. Humphrey, T. Ganey, C. Ginsburg, A. Kimber, L. King, G. Krafft, F. Marhauser, R. Michaud, C. Mounts, R. Nelson, W. Oren, A. Palczewski., T. Plawski, T. Powers, J. Preble, C. Reece, T. Reilly, A. Seryi, A. Solopova, M. Spata, and P. Vasilauskis

Agenda and Notes

1. Operations Status and Summary/Review (Bickley/Powers)

Resume every other week meeting on RF/SRF issues.

Quenches observed in 2L26-8 over weekend. Hard quenches indicated from analysis of field data.

Not able to recover cavity, even at low gradient without high heat load?

Correlation with end of Linac and Differential pumping posited and discussed.


2. Plasma Processing Update (Powers)


Status of Work on Plasma Processing

3. Progress on Particle Counter (Geng/Spata)

Particle Counter getting closer. Now design is focusing on "laser blanket" for aperture design. Detect phase shifts in interferometer arrangement.

July 22 updated solution and updated cost presented to division leadership. Waiting for favorable financial decision.

Action Item

New Ion pump evaluation;

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