BSM23W Vertical Beamsize Monitor Electronic Logbook 2007

January 2007

January 2, 2007 (C.Strohman, T.Wilksen, E. Tanke): Upgrade of Xlinx and Coldfire software

• The new version of the Xilinx software now running on this unit is 5.5
• The new version of the Coldfire software now running on this unit is 0.96B

January 4, 2007 (R.Holtzapple, E. Tanke): CESR-c beamsize measurements

• Present CESR-C conditions are that we have current in the following 23 bunches:
  • T1B4
  • T2B3,T2B4,T2B5
  • T3B3,T3B4,T3B5
  • T4B3,T4B4,T4B5
  • T5B3,T5B4,T5B5
  • T6B3,T6B4,T6B5
  • T7B3,T7B4,T7B5
  • T8B3,T8B4,T8B5
  • T9B5
• A typical run is currently ~ 30 minutes. 10k turn (raw) measurements using T1B3 as pedestal bunch:
  • Beginning run "A" (at 13:28): BSM23W datafile 936, BSM23E datafile 935
  • End run "A" (at 14:00): BSM23W datafile 937
  • Different end of run (at 15:14:): BSM23W datafile 939, BSM23E datafile 938
  • Files are currently on the VAX : [cesr.palmer.ts101.bsm]

January 15, 2007 (R.Holtzapple, E. Tanke): CESR-c beamsize measurements, both species in the machine.

• Present CESR-C conditions are that we have current in the following 24 bunches:
  • T1B3,T1B4
  • T2B3,T2B4,T2B5
  • T3B3,T3B4,T3B5
  • T4B3,T4B4,T4B5
  • T5B3,T5B4,T5B5
  • T6B3,T6B4,T6B5
  • T7B3,T7B4,T7B5
  • T8B3,T8B4,T8B5
  • T9B5
• A typical run is currently ~ 33 minutes. 10k turn (raw) measurements made during one and the same run using T1B1 as pedestal bunch:
  • Beginning of run: file 943 (electrons) and file 944 (positrons)
  • Middle of run: file 945 (electrons) and file 946 (positrons)
  • End of run: file 947 (electrons) and file 948 (positrons)

March 2007

March 13, 2007 (G.Codner, R.Holtzapple, J.Kern, M.Palmer, L.Schachter, E.Tanke): MS ECLOUD CESR-c with witness bunches

• Timing scan at PMT HV=-550V confirms Tglob=160 as optimum (file 1065)
• Electrons nominally loaded to 0.75 mA/bunch, with a leading train of 10 bunches, followed by one or more witness bunches. Files are for 4k turns of raw data. Only the witness bunches are shown in the table below (all measurements include bunches 1 through 10):
  • #1069: B42
  • #1070: B38,42
  • #1071: B34,38,42
  • #1072: B30,34,38,42
  • #1073: B28,30,34,38,42
  • #1074: B26,28,30,34,38,42 (low current in the later bunches)
  • #1075: B24,26,28,30,34,38,42
  • #1076: B22,24,26
  • #1077: B20,22,24,26
  • #1078: B19,20,22
  • #1079: B18,19,20,22
  • #1080: B17,18,19,20,22
  • #1081: B16,17,18,19,20,22
  • #1082: B15,16,17,18,19
  • #1083: B14,15,16,17,18,19
  • #1084: B13,14,15,16,17,18,19
  • #1085: B12,13,14,15,16,17,18,19
  • #1086: B11,12,13,14,15,16,17,18,19

March 14, 2007 (M.Billing, G.Codner, R.Holtzapple, J.Kern, M.Palmer, E.Tanke): MS Ion Studies CESR-c with train of 45 bunches

• Electron data taken over 10 k turns (raw data), PMT HV=-550V, Tglob=160 for a train of 45 bunches
• Electrons nominally loaded to 0.75 mA/bunch
  • #1088
• Electrons nominally loaded to 0.50 mA/bunch
  • #1089
  • #1090 (as 1089, but with half the feedback gain)
  • #1091 (larger beam size)

April 2007

April 03, 2007 (G.Codner, R.Holtzapple, J.Kern, M.Palmer, E.Tanke): MS ECLOUD CESR-c with witness bunches

• Timing scan at PMT HV=-550V confirms Tglob=160 as optimum (file 1119)
• Electrons nominally loaded to 0.75 mA/bunch, with a leading train of 10 bunches, followed by one or more witness bunches. Files are for 1k turns of raw data. Only the witness bunches are shown in the table below (all measurements include bunches 1 through 10):
  • #1120: B42
  • #1121: B38,42
  • #1122: B34,38,42
  • #1123: B30,34,38,42
  • #1124: B26,30,34,38,42
  • #1125: B22,26,30,34,38
  • #1126: B20,22,26,30,34
  • #1127: B19,20,22,26,30
  • #1128: B18,19,20,22,26
  • #1129: B17,18,19,20,22
  • #1130: B16,17,18,19,20
  • #1131: B15,16,17,18,19
  • #1132: B14,15,16,17,18
  • #1133: B13,14,15,16,17
  • #1134: B12,13,14,15,16,17,18,19,20
  • #1135: B11,12,13,14,15,16,17,18,19,20
  • #1136: B11,12,13,14,15,16,17,18,19,20 (HW trigger 1, 8k turns but shutter overcurrent, data invalid)
  • #1137: B11,12,13,14,15,16,17,18,19,20 (HW trigger 1, 8k turns but shutter overcurrent, data invalid)
  • #1139: B11,12,13,14,15,16,17,18,19,20 (HW trigger 1, 8k turns,PMT=500V, T=200 (see file 1138) but shutter overcurrent, data invalid)
  • #1140: B11,12,13,14,15,16,17,18,19,20 (repeat of #1135, i.e. 1k turns)
  • #1142: B11,12,13,14,15,16,17,18,19,20 (HW trigger 1, 8k turns,PMT=450V, T=240 (see file 1141 for timing scan))

April 05, 2007 (E.Tanke): New trigger handling for HW trigger 1 (bit 0)

• When in triggered mode, the BSM23W (and BSM23E) unit will sit and wait for this trigger. As soon as it sees the trigger the shutter will be opened after which there is a fixed delay of 70k turns before data taking starts (one needs to wait for the shutter to open and for mechanical vibrations to settle). Note that this is the way these units now function ONLY for taking raw data and ONLY for trigger bit 0. This can be expanded as needed.

April 11, 2007 : /nfs server directory restructuring

• The /nfs server directory has been restructured (see this link). BSM23W files that have been stored under /nfs/cesr/temp/ts101/BSM23W_data before, can now be found under /nfs/acc/temp/ts101/BSM23W_data

June 2007

June 12, 2007 (E.Tanke): Reset of moxa server

• Had to reset the moxa server. T.Wilksen and C.Strohman will discuss how to deal with this issue in the long run:
  • The Coldfire can be made to auto-boot (thus in principle eliminating the need for a moxa server), but the non-volatile memory of the Coldfire has been seen to get corrupted at times
  • Adding a moxa server would in principle allow one to always interact with the Coldfire (e.g. cause it to reboot) but:
    • Adding over 100 moxa servers for future operation of CESR-TA and for ERL would be costly
    • Sometimes the moxa servers themselves get blocked; this means that for ease of operation, one would need to add the capability of a remote reset or remote power on/off control
  • A solution may be to have a single server serving multiple Coldfires with serial lines