• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT

    User name M.Olson

    Log entry time 08:14:56 on May26,2008

    Entry number 239724

    keyword=OWL Shift Summary

    M. Olson
    D. Protopopescu
    -----------------------------------------------------------------
    Start of Shift:
    Beam down approximately 24 min before start of shift, still down
    Target: LH2 (6cm)
    Kinematic 5 (0%)
    Approximately 8M events taken out of 65M required
    -----------------------------------------------------------------

    0035: Beam back but position/orbit not optimal. May have had some
    misteered beam pulses spray into target as both the temp and vacuum spiked. Called for beam off, and target recovered. MCC fixing orbit.
    Will bring us back to 5uA initially and check conditions.

    0050: Beam at 5uA, target is OK and position looks good.
    0055: Current at 15uA, position OK, feedbacks on. target OK.
    Begin run 1578 (checking prescales)

    0103: End run 1578 and changing prescales

    Run Begin End Events Total
    -----------------------------------
    1579 0104 0144 5M 13M
    1580 0145 0227 5M 18M
    1581 0228 0322 5M 23M * Many beam trips late in run
    1582 0322 0404 5M 28M * Many beam trips, feedbacks on and off, with some position instability
    1583 0405 0457 5M 33M * Many beam trips
    1584 0458 0541 5M 38M * Beam stability improved
    1585 0542 0624 5M 43M
    1586 0625 0705 5M 48M
    1587 0706 0730 1.7M 49.7M * Ended due to IOC failure (MCC)
    1588 0740 (In progress at end of shift)
    ------------------------------------