• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT
    Make New Entry, Make Followup Entry

    User name silwal

    Log entry time 00:04:19 on September12,2009

    Entry number 289156

    keyword=swing shift summary

    4:00 compton tuning ongoing.
    5:08 compton tuning done. ready for beam.
    5:15 found that Alexander had turned some of the magnets down. turned them back up/started cycling them.
    5:28 Q2 quenched. asked MCC for controlled access to reset Q2. Jack and Alexander went into the hall and reset Q2.
    5:45 back to Beam permit. Q2 back up.
    5:50 moved the target from optics carbon to empty for Harp scan.
    5:50 Q2 down again!
    5:55 beam down. MCC has a magnet down. they claim it should be up in no time.
    6:40 beam back. asked MCC for harp scan with raster @ 11.00x8.50 (MCC units) and without the raster on BPMA and BPMB.
    6:55 harp scans done. asked MCC for controlled access to reset Q2.
    7:10 moved target from empty to carbon holey. asked MCC for 5uA beam.
    Q2 still down. Alexander asked MCC to call in their cryo on call to look at the Q2 cryo. Q2 He levels have been dipping periodically for sometime, and Jack seemed quite worried.
    6:50 harp scan without the raster measure the beam y-width at BPMB to be about 63 um, BPMA ~ 129 um. So we asked MMC to adjust the y-width to get about 200 um at the target.
    7:55 cryo on call called back. he is going to study Q2 cryo to see if any adjustments are needed.
    8:50 Moller setup started. having issues with Q2 still, went down again when Jack tried to start it. Jack is trying to resolve the problem at the moment.
    10:45 Moller done. asked for escorted controlled access to reset right arm Q2.
    11:10 reset Q2. slowly cycling it up. requested MCC to back out of Moller, and the harp changes from earlier because some of the quads before the compton chicane was retuned after harp scan. hopefully backing out of the harp changes will give us the compton tune back.
    11:20 slowly ramped current on Q2. was fine till 1400 Amps, but quenched again when I enabled the septum readback.
    12:00 MCC still tuning the beam at the target to get it to at least 150x150 um.