aLIGO LHO Logbook

LHO VE

kyle.ryan@LIGO.ORG - posted 10:03, Thursday 28 January 2016 - last comment - 11:02, Friday 29 January 2016(25221)

X2-8 BT ion pump shut off ("shut down" on display) @ 0630 hrs. local

0915 -0955 hrs. local -> To and from X-end 

Pump won't start on either HV channel, gets to 500V then limits at 500ma -> Tempted to increase the default arc limit of 10 per minute but will consult with GammaVacuum first

Comments related to this report

kyle.ryan@LIGO.ORG - 10:55, Thursday 28 January 2016 (25225)

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1020 - 1040 hrs local -> To and from X-end 

Consulted with Gamma Vacuum -> They advised not exceeding 20 arc/min setting -> I tried 15 - no help -> I also unplugged the HV cable from the controller but left the SafeConn connector connected and then enabled the HV which then came up to 7500V without a problem - meaning the controller is likely OK - more to come

scott.mccormick@LIGO.ORG - 11:02, Friday 29 January 2016 (25239)

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What type of HV cable is in service? Gamma's cable or RG58 RED? Did you pull both types of cables to have one as a back up?