Commissioning history of the new PF storage ring

The PF storage ring was reconstructed to a low-emittance lattice configuration during Dec. 1996 - Sep. 1997. The new PF storage ring was commissioned during October, 1997. This is a short historical review of the commissioning works.

• October 1, 1997
  Commissioning started at 2:49 PM.
  The beam circulated the ring over 4 turns at 10:23 PM.
• October 2
  The beam circulated over 60 turns at 0:10 AM.
  First beam was successfully stored at 2:58 PM.
• October 3
  Improved injection efficiency. Beam filling rate of 0.3 mA/sec was achieved. Maximum beam current of 80 mA was stored at 11:38 PM.
• October 4
  Vacuum conditioning was carried out. Maximum stored current: 224 mA at 6:28 PM.
• October 5
  Vacuum conditioning was carried out. Maximum beam current: 300 mA at 2:08 PM.
• October 6
  Maximum beam current of 332.7 mA was achieved at 9:15 AM.
  Vacuum conditioning, tuning on RF system, check on BPM electrode and tune survey were carried out.
• October 7
  Maximum beam current of 361.3 mA was achieved at 7:08 AM.
  Linac maintenance & study during 9:00AM - 0:00AM (Oct. 8).
• October 8
  Beam current of 389.1 mA was achieved at 5:08 AM.
  Vacuum conditioning and survey of beam optics was carried out.
• October 9
  Test of the SR position monitors was carried out in the morning.
  After some maintenance works, vacuum conditioning continued. Beam current of 502 mA was achieved at 7:35 PM.
• October 10
  Vacuum conditioning was carried out with beam currents of 500-400 mA.
• October 11
  Vacuum conditioning was carried out with beam currents of 500-400 mA.
• October 12
  Vacuum conditioning was carried out with beam currents of 500-400 mA.
• October 13
  Tuning of the beam orbit and short study on ion trapping was carried out.
  Vacuum conditioning continued in the midnight.
• October 14
  Linac study was carried out in the daytime. Test on the orbit feedback system and correction on the beam optical functions were carried from the evening to the night.
• October 15
  Some check & maintenance works were carried out in the daytime.
  Vacuum conditioning continued in the night.
• October 16
  Measurement of the beam emittance was carried out at low beam currents.
  Tuning on the beam orbit and vacuum conditioning took place after that.
• October 17
  Vacuum conditioning was carried out. Outgassing from the SR absorbers in the undulator/wiggler beamlines was also carried out in the midnight.
• October 18
  Vacuum conditioning (outgassing by synchrotron radiation) was carried out.
• October 19
  Vacuum conditioning was carried out.
  New control system for the multipole wiggler #13 was tested.
• October 20
  Vacuum conditioning and machine tuning were carried out.
• October 21
  Tuning on the beam orbit and a test of the new control system for MPW#13 were carried out.
• October 22
  Vacuum conditioning of the beamlines was carried out.
• October 23
  Correction of beam orbit for insertion deviced was carried out in the morning.
  Test of the orbit feedback system was carried out from the afternoon to the midnight.
• October 24
  Maintenance works were carried out during 9:00 AM - 5:00 PM.
  Vacuum conditioning was carried out after 5:00 PM.
• October 25
  Correction data for insertion devices were taken. Vacuum conditioning was carried out in the midnight.
• October 26
  Test on the orbit feedback system was carried out in the daytime. Vacuum conditioning was carried out in the midnight.
• October 27
  Test on the orbit feedback system was carried out.
• October 28
  Measurement of beam emittance, test on the orbit feedback system and tuning on insertion devices were carried out.
• October 29
  Adjustment on the SR positions was carried out in the daytime.
  Tuning on Insertion devices was carried out in the night.
• October 30
  Tune survey, tuning on insertion devices and test on the orbit feedback system were carried out.
• October 31
  Study on a single-bunch operation, tuning on the insertion devices and study on ion-trapping were carried out.
• November 1
  Test on the orbit feedback system was carried out.
• November 2
  Measurement on the beam emittance, test on the new control system for MPW#13, study on a single-pass BPM system and tuning on the beam orbit were carried out.
• November 3
  Test on the orbit feedback system was carried out.
• November 4
  User run started.

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