Difference between revisions of "PITMinutes 05-07-2018"

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(Agenda and Notes)
(Agenda and Notes)
 
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why people are reducing them and work through mitigations.
 
why people are reducing them and work through mitigations.
  
2. C100 Performance Studies (Solopova, Powers)
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2. C100 Performance Studies (Solopova)
  
[https://casa.jlab.org/LINACPIT/C100_Performance.pdf C100 Performance Talk]
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[https://casa.jlab.org/LINACPIT/C100status_4-30-18.pptx C100 Performance Talk]
  
3. C100 Refurbishment Planning (Freyberger)
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3. C100 Quenches (Powers)
  
[https://casa.jlab.org/LINACPIT/Brainstorming_on_C100_Refurbishment.eml Items Request Email]
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[https://casa.jlab.org/wiki/images/b/b8/PIT_meeting_7May2018_RF_Trips.pptx Yet another version of Tom's presentation]
  
[https://casa.jlab.org/LINACPIT/C100_Refurbishment_Brainstorming_List.pptx C100 Refurbishment Brainstorming List]
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[https://casa.jlab.org/wiki/index.php/Image:26Apr_Quench_and_example_of_SEL_CRFP_errors_driving_microphonics_v2.docx A brief analysis of some of the data collected with the RF waveform harvester]
  
4. Draft Cryomodule Specification (Benesch)
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[https://casa.jlab.org/LINACPIT/26Apr_Quench_and_example_of_SEL.docx Measurement regarding C100 Quenches]
  
Jay has written up a set of goals for the cryomodules:
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4. C100 Refurbishment Planning (Freyberger)
[https://casa.jlab.org/LINACPIT/2017CM_specR2.pdf Draft Cryomodule Specification]
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5. Draft Acceptance Criteria (Legg)
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[https://casa.jlab.org/wiki/images/1/15/C100_System_improvement_Discussions_LRPIT_7MAY2018.pptx C100 System Improvement Discussion]
  
Bob shared the LCLS II module acceptance criteria that the
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[https://casa.jlab.org/LINACPIT/Brainstorming_on_C100_Refurbishment.eml Items Request Email]
LCLS II project is working under. We should perhaps adopt something
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similar for C75? (Discuss Pros and Cons)
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[https://casa.jlab.org/LINACPIT/Acceptance_criteria.pptx LCLS II Module Acceptance Criteria]
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[https://casa.jlab.org/LINACPIT/C100_Refurbishment_Brainstorming_List.pptx C100 Refurbishment Brainstorming List]
  
 
== Action Items ==
 
== Action Items ==

Latest revision as of 13:28, 7 May 2018

Attendance

R. Bachimanchi, K. Baggett, M. Drury, A. Freyberger, R. Geng, A. Hutton, G. Krafft, A. Kimber, R. Legg, C. Mounts, R. Nelson, T. Plawski, T. Powers, C. Reece, T. Reilly, R. Rimmer, and A. Solopova.

Agenda and Notes

1. Operations Status and Summary/Review (Freyberger)

High average current limits remain. Usually A runs 22.5 muA and C runs 50-60 muA. Seems more and more solid that the Hall C current limit is 70-75 muA, independent of the Hall A current. And the main trips are from beam loss. So focus is shifting back to injector. Today, bunch length measurements are being made for the different Hall bunches. Recent work points to longitudinal phase space tails causing high average current trips. Is there a better diagnostic for these?

Anna will be working on getting a handle on OPS-initiated reductions in the C100 cavity gradients. First try to understand why people are reducing them and work through mitigations.

2. C100 Performance Studies (Solopova)

C100 Performance Talk

3. C100 Quenches (Powers)

Yet another version of Tom's presentation

A brief analysis of some of the data collected with the RF waveform harvester

Measurement regarding C100 Quenches

4. C100 Refurbishment Planning (Freyberger)

C100 System Improvement Discussion

Items Request Email

C100 Refurbishment Brainstorming List

Action Items

Leadership of quenches. Offline discussion.

Complete C75 Module Specifications (Marhauser, Benesch, Krafft)

C100 Refurbishment Project for the future?