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Reports until 14:16, Sunday 26 April 2015
H1 TCS
eleanor.king@LIGO.ORG - posted 14:16, Sunday 26 April 2015 (18069)
HWS ITMY SLED replaced, current limits adjusted

Greg, Nutsinee, Elli

ITMY HWS Sled has be replaced by a new SLED, part number QSDM-840-5--00-12.02.44.  The current limit was set to 105mA, which corresponds to an optical ouput power limit of 2.5mW.  This was achieved by setting the voltage read out at the current limit testpoint at 0.5V.  The calibration on the MEDM screen has not been changed.  The current limit on the X-SLED driver was also dropped to 105mA, optical power limit 2.4mA,  current limit testpoint 0.45V.  We started realigning the HWS ITMY and ITMX paths, and found they were pretty messed up.  We did a bit of work trying to improve them.  We have left the Y-SLED aligned to the irises, but not the green beam.  The X-SLED is not well aligned at the moment.

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