Difference between revisions of "PITMinutes 04-09-2018"

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(Agenda and Notes)
(Agenda and Notes)
Line 7: Line 7:
 
1. Operations Status and Summary/Review (Freyberger)
 
1. Operations Status and Summary/Review (Freyberger)
  
Four Hall Ops has started. Have had a rough couple weeks
+
High average current limits remain. Usually A runs 22.5 muA
as the beam average current was raised. CEBAF seems to have
+
and C runs 50-60 muA. Seems more an more solid that the Hall
an average current limit around the spec average current of
+
C current limit is 70-75 muA, independent of the Hall A current.
460 muA 5 pass beam. This current has been briefly achieved,
+
And the main trips are from beam loss. So focus is shifting
but steady OPs at around 325 muA. BBU looked for but none
+
back to injector. Today, bunch length measurements are being
obviously present. Much optics work has cleaned up beam and
+
made for the different Hall bunches.
made more substantial apertures, but the average current limitation
+
remains. OPS trip rates now dominated by RF trips.
+
  
 
C75 Review completed. Will post review report when available.
 
C75 Review completed. Will post review report when available.

Revision as of 13:10, 9 April 2018

Attendance

R. Bachimanchi, K. Baggett, J. Benesch, R. Geng, C. Hovater, G. Krafft, A. Kimber, F. Marhauser, C. Mounts, R. Nelson, T. Plawski, T. Powers, C. Reece, 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 an 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.

C75 Review completed. Will post review report when available.

RF separators seem to have settled down. circulator loads unstable. Recovery reboot?

2. Radiation Reduction with Lead Collars (Legg)

C100 Lead Collar Update

3. More on Beam Loading and Q_ext (Krafft)

Full Power Test Note

Presentation on Optimal Qext

4. C100 Refurbishment Planning (Freyberger)

5. Draft Cryomodule Specification (Benesch)

Jay has written up a set of goals for the cryomodules: Draft Cryomodule Specification

6. Draft Acceptance Criteria (Legg)

Bob shared the LCLS II module acceptance criteria that the LCLS II project is working under. We should perhaps adopt something similar for C75? (Discuss Pros and Cons)

LCLS II Module Acceptance Criteria

Frank and Gigi (mainly) have written up a C75 performance specification document.

JLAB-TN-17-055: Draft C75 Specification Document

Action Items

Leadership of quenches. Offline discussion.

Complete C75 Module Specifications (Marhauser, Benesch, Krafft)

C100 Refurbishment Project for the future?