• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT

    User name Seonho Choi

    Log entry time 03:35:59 on July23,2001

    Entry number 67193

    keyword=Charge Asymmetry Feedback

    I start to have a serious doubt on charge asymmetry feedback. Apparently, it is not working properly if it is on. Here is a brief summary for the last few hours.

    Run 1339 | Sun Jul 22 21:46:28 EDT 2001 | Charge Asy = 66 +/- 50 ppm
    Run 1340 | Sun Jul 22 22:49:28 EDT 2001 | Charge Asy = -53 +/- 7 ppm
    Run 1341 | Sun Jul 22 23:50:18 EDT 2001 | Charge Asy = -120 +/- 5 ppm
    Run 1342 | Mon Jul 23 01:23:36 EDT 2001 | Charge Asy = -118 +/- 8 ppm
    Run 1343 | Mon Jul 23 03:01:22 EDT 2001 | Charge Asy = -180 +/- 7 ppm

    I can say that the feedback worked between run 1339 and 1340. But since then, it is not doing its job. On the halog, there is no mention of turning off the automatic feedback. And even at the current run, 1344, the charge asymmetry is around
    200ppm. I will issue "feedback on" command again and watch what happens.