Reports until 16:20, Wednesday 30 July 2014
H1 SEI
hugh.radkins@LIGO.ORG - posted 16:20, Wednesday 30 July 2014 (13082)
ETMy HEPI Position Loop Targets

Wanted to confirm the target numbers for the ETMY position loops.  The Rx & Rz positions have been at their target positions since it appears the HEPI was partly locked late March.  Before that lock and subsequent HIFOY the Rz was drifting to -20000nrads which was a good place for IAS--see alog 10765.  However, when the HEPI was locked, it was pushed and drifted by early April to ~6000nrads.  The Bias Target position is and has been set to 6700nrads.  If the IAS alignment is still valid under vacuum, these target might be more help at -20000nrads.  The Rx similarly moved from 2000 to -12000nrads when HEPI was locked.  The Bias Target is currently -10900; likewise, it might relieve TMS or others to be reset to 2000.

Attached is 120 days for Cart Basis Positions with the notes of use.

Images attached to this report