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Reports until 16:28, Tuesday 24 May 2016
LHO VE
chandra.romel@LIGO.ORG - posted 16:28, Tuesday 24 May 2016 (27361)
HAM11&12 annulus IP replacement
Gerardo, Kyle, Chandra

Replaced HAM 11 & 12 annulus IPs - both were spent. While at it, we re-checked the inner o-ring leak to see if it changed since many door bolts were tightened after pumping down diagonal volume. We vented the annulus space to atmosphere. Diagonal volume pressure rose an order of magnitude. Attached are pressure plots from annulus vent on 3/24 and from today.

Annulus space quickly pumped down to 1e-6 Torr with hung turbo carts and now is pumping purely on annulus IPs.

HAM 12 reads 2 mA (HAM 11 wiring on CDS)
HAM 11 reads 5 mA (HAM 12 wiring on CDS)
Images attached to this report
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