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    User name D. Armstrong

    Log entry time 08:24:41 on April 06, 2010

    Entry number 316643

    keyword=late follow up on spot++ on Pb target

    Thanks to Bob for his explanation!

    For the record, I had switched to T5 triggers for the Pb target, as per the instructions (I used T8 for the empty target run). So, the explanation for the position plots is primarily that the BPMs do not work at this low beam current, and so one is just seeing noise on the beam positions. Duuh, I should have realized this immediately, but I was a bit sleepy...

    Side note: we should probably update the "Lead Target Strtup/Recovery" procedures to note that the Attenuator/Slit settings are not very reproducible when trying to get the 5 nA current from one attempt to another. Otherwise instructions were very clear for the procedure.