Next Meeting

Date: Sept 3, 1996

Time: 3:00 - 4:00

Place: Test Lab Conference Room

Attendees

D. Douglas, D. Kehne, F. Dylla R. Legg, L. Merminga, K. Jordan

Addenda/Errata to Previous Minutes

None

Items of Discussion

• We went through the schedule milestones "developed" by Legg to see if people could meet the dates. The results will be published on the www and we will do updates in the weekly meeting with a item by item review monthly in the meeting. The URL for the results will be ~accel/fel/documentation/feldoc1-8.pdf.
• Autosteer came up again because of J.C.Denard's questions aout the critical wavelength of the SLM in the 180 degree bend. As a workaround, using a thin foil OTR for the flip in viewer would allow the framegrabber image of the flip in viewer and the downstream
• BPMs to be used for Autosteer. JC Denard will advise on the perturbation to the beam by the OTRs. New Issues

  ---

  • D. Douglas pointed out that with the present design we are unable to put the beam in the straight ahead 42 MeV dump because the optical chicane dipoles and the arc dipoles are in series. To put the beam in the dump will require removing the field in the dipole. Legg/Krafft will specify the diagnostics to be used in the dump and Douglas will then specify the magnet field quality necessary to perform the measurement. The specification of the field quality will then go to G. Biallas for action.

  Action Items

  ---

  • Legg/Krafft will decide on dump diagnostics 9/4
  • Douglas will specify the field quality in the dipole shut off to run straight ahead 9/11
  • OTR beam interaction number by Denard 9/11

  Action Priority Items (assigned)

  ---

  A-04   1  Unit gradient precision                       Bohn, Liu
  A-05   2  Injector energy precision                     Douglas
  A-06   1  10 MeV dump optics                            Douglas
  A-09   1  Dump Instrumentation                          Legg               6/04/96
  A-10   2  Back leg diagnostic placement                 Douglas
  A-15   1  Commissioning Procedure                       Legg, Krafft       5/16/96
  A-19   0  Web Documentation                             Jordan              weekly
  A-20   1  10->42 MeV dump                               Douglas
  A-24  1,2 Beam loss                                     Bohn
  A-29   1  Software Planning for Longer Term             Jordan (?)
  A-30   1  Burnthrough/Conflat Expansion                 Denard, Kloppel
  A-34   2  Consistent Linac phasing plan                 Yunn
  A-35   1  simultaneous transverse and longitudinal      Kehne/Engwall   8/6/96
  A-39   1  report on ARR plan                            Legg            8/23.
  A-41   2  Modeling of lower than 10 MeV injector        kehne, Liu      10/1/96
  A-42   2  2nd gun for long term tests                   Bohn            10/1/96
  A-44  1,2 Start Rui on emittance code                   Bohn            8/13/96
  

  Action Items (pending)

  ---

  P-01  1   Determine Beam Pulse structure for setup                      Legg
  P-02  1   Laser phase modulator                                         Jordan
  P-04  2   Is an energy compression scheme needed?                       Douglas
  P-05  1   Devise fine-tuning procedure for buncher gradient             Krafft/Kehne
  P-08 1,2  How do we change energy? What is the energy range?            Benson
  P-09  2   Do we need bunching after the module                          Douglas
  P-14  1   How is the gun/laser operated?                                Benson
  P-15      Discussion on robustness of controls                          Legg
  P-18  1,2 Technote by Yunn summarizing machine impedance                Yunn
  P-19  2   Consistent linac/bunching phase sets                          Yunn
  P-20  1   Lock plans (who in particular)                                Johannes?
  P-21  1   Save/restore plans                                            Benesch
  P-25 1,2  RF control sensitivities/                                     Merminga
              Microphonics Diff for FEL/
              Pathlength effect
  P-28 1,2  Scrapers: Where and How?                                      Bohn, Li
  P-29  2   FEL/linac interaction                                         Merminga
  P-30  2   Tracking including realistic wiggler fields                   Douglas
  P-32  2   Are two sextupole families enough to tune M56                 Douglas
  P-35  1   Coordinated ITS beam running/SRF commissioning plan           Legg/Bohn/Harwood
  P-37  1   42 MeV dump design and interlocking                           Wiseman
  

  Agenda for Next Meeting

  ---

  
                  Item                              Person Responsible     Time
                  ----                              ------------------     ----
      *   Review agenda/corrections to minutes            Legg             5 min.
   
      *   Action Items Updates                            All             10 min
      *   ARR Introduction                                Boyce           20 min
      *   New Issues                                      ALL             10 min
      *   Agenda for next meeting                         All              5 min.