LHO Witness plate wafer BSC1 Oct 15, 2013

Document #:

LIGO-T1300874-v1

Document type:

T - Technical notes

Abstract:

History of this witness plate:

FRI FEB 1,'13 Placed WP, no activity other than door on that day or following MON

Work in adjacent BSC2 continued for ~ 3 months, until...

APR 27, '13 Pump down (had to wait for all chambers to be closed before pumping)

TUE OCT 7, '13 1pm vented volume
WED OCT 8, '13 door off, AOS elliptical baffle work in nearby BSC2
TUE OCT 15, '13 Pulled witness plate to send to CIT

Files in Document:

Other Files:

• Large Image-T1300874-1.tif (file is not accessible)
• t1300874 02122014.xlsx (file is not accessible)

Topics:

• System Engineering

Authors:

• Betsy Weaver

Keywords:

contamination control wafer witness plate sample

Notes and Changes:

version 1 includes count on new setup (jan / feb 2014 cit). Large image and excel count data. MP and CiT. (This one was not counted on previous setup.)

Referenced by: