NOTE: C. Bohn will be on vacation from 14-24 Jul 98; D. Gilchrist will have phone numbers by which he can be reached during that time.

Next Meeting

Date: 31 Jul 98

Time: "0845"-0945

Place: FEL Facility Break Room

Agenda for Next Meeting

                Item                             Person Responsible     Time
                ----                             ------------------  --------
Status of Open Action Items                             All             5 min
Commissioning Schedule                                  Bohn           10 min
Status of Subsiiary Tasks for Metaprocedure             Bohn            5 min
Overview of Injector Plans                              Biallas        20 min
New Issues                                              All             5 min

This Week's Attendees

S. Benson, J. Bisognano, F. Dylla, A. Grippo, K. Jordan, R. Lauze, R. Li, L. Merminga, G. Neil, D. Oepts, P. Piot, M. Shinn, B. Yunn

Closed Action Items

• FEL WBS Managers: Provide A. Hofler with information needed for FEL Alarms Handler: EPICS names, definitions, and screens for those systems that are different from the CEBAF machine.
  Status: M. Shinn and S. Benson will resend their inputs to Hofler. Others should send inputs, as well, and as appropriate. (Complete)

  Benson: Generate software-requirements document for limiting the use of viewers in the wiggler region and submit it to the Software Group.

  Status: (Complete)

Items of Discussion

The weekly schedule was discussed. During the week gun reassembly proceeded smoothly and we picked up a full day on the schedule. However, the cathode that was produced had difficulty holding off voltage beyond 335 kV and produced no photoemission so it was decided to reactivate the NEG pumps and high voltage process the cathode to 425 kV. Along the way we will gather data from the RGA and also try to determine whether the heat cleaning, or cesiation is the biggest problem in producing voltage standoff at the cathode.

A schedule has been produced for the next two weeks which has us doing 5 micron lasing with the high power mirrors, doing initial recirculation, and providing light for FEL characterization. We will run this weekend and have no Maintenance Day on Monday 7/27 but will resume normal schedule the following week.

A proposal to install up to 6 new viewers was presented by K. Jordan to attempt coverage of the large spans in the machine where we have few diagnostics. It appears possible to install viewers in existing ports so that the mods required are minimal. A prioitization was established for various locations. K. Jordan was directed to acquire the components and assemble and install as many as budget permits.

New Issues

None.

New Action Items

Resolve Safety/Operations Documentation Issues                Neil
Produce gun upgrade plan                                      Biallas
Hold review meeting on CSR plans                              Bohn
Determine FEL Characterization Plans

Old Action Items

None.

Procedures in Work (UNREVIEWED AT Meeting)

Tomographic Phase-Space Map (for CSR studies)             Piot, 31 Jul 98

Procedures Needed for Recirculation

RF Stability during Energy Recovery                       Merminga, 17 Jul 98

Unfinished Subsidiary Tasks for Phase Space Metaprocedure

Task                                                           Principal
----                                                           ---------
I.      Stabilize Drifts in Drive-Laser RF Phase               Walker/Fugitt

II.     Calibrate RF Gradients
        A.      Buncher                                        Yunn    
        B.      Cryounit Cavities (fix control screen)         Merminga/Krafft/Yunn
        C.      Cryomodule Cavities                            Merminga/Krafft/Yunn

III.    Reconcile Methods for Setting RF Phase                 Merminga/Krafft/Yunn
        A.      Buncher Cavities
                2.      Minimum bunch length/time of flight
                
        B.      Cryounit Cavities
                1.      Transient phasing
                2.      Cresting
                3.      Time of flight

IX.     Complete Diagnostics Procedures and Training            Krafft/Piot
        A.      M_55 #1, #2
        B.      Happek #1, #2
        C.      BPMs
                1.      button calibration factors 
                2.      rotated MEDM spike charts
                3.      difference orbit data acquisition script
        D.      Multislit #1, #2
        E.      Quad/Viewer (at Wiggler, after Wiggler)
        F.      Multimonitor (at Wiggler)
        G.      SLM/CSR
        H.      Zero Phasing
        I.      Momentum Spread (Injector, Linac Pre-Wiggler, Linac Post-Wiggler)
        J.      Energy

XIV.    Laser Turn-On Procedure                                Benson