cheryl.vorvick@LIGO.ORG - posted 14:18, Tuesday 08 January 2013 - last comment - 11:59, Wednesday 27 November 2013(5047)
HAM2 witness plates: Installed Dec. 19, 2012
Attached are pictures of witness plates I installed in HAM2 before pumpdown. There are 4" silicon wafers and 1" optics in the chamber, and most are on stage-0 of the ISI or in the beam tube, one 4" wafer is on the HAM2 table surface, near the North edge of the table. #62 = NW corner of stage-0, showing three 1" optics and one 4" silicon wafer #63 = beam tube North of HAM2 ISI, showing one 4" silicon wafer #67 = W side of stage-0, showing one 4" silicon wafer #70 = beam tube South of HAM2 ISI, showing one 4" silicon wafer #71 = SW corner of stage-0, showing one 4" silicon wafer #74 = HAM2 floor, under stage-0, showing two 4" silicon wafers Not shown, one 4" wafer on the HAM2 table. - Total number of 1" optics in chamber = 3. - Total number of 4" wafers in chamber = 8.
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Dec. 19th alog link: https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=5047
On Thur Nov 21st, 2013: We (Calum and I) picked up 2 of the 3 1" optics just before closing up this time in order to reprocess the optic for future use.