NMR won't lock at 2.607 GeV

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User name jmammei

Log entry time 08:07:14 on October16,2010

Entry number 335119

Followups:

335125 10/16/10 08:46 jmammei Q2, 3 momentum increased by 2%
335133 10/16/10 09:28 brads LHRS dipole at 2.607 and NMR locked (HowTo instructions)

keyword=NMR won't lock at 2.607 GeV

We're having trouble getting the NMR to lock at 2.607 GeV. We've tried using a different probe (no obvious effect) and we've also tried turning off regulation and setting to a different curernt manually. It was originially 910 A and we set it to 937 and it locked, we set it to 910, stayed locked, and it unlocked as soon as we turned regulation on. Tried again; it locked at 927, stepped it down and stayed locked, we went lower and sneaked up on the correct momentum setting and then as soon as we turned regulation on, we lost the lock.