Replaced argon/ethane gas bottles for BB wirechambers

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User name Kalyan

Log entry time 19:52:07 on November 30, 2008

Entry number 251521

Followups:

251535 11/30/08 21:06 xqian Data Check for the BigBite Wire Chamber Gas Problem
251536 11/30/08 21:09 xqian Hitting efficiency for RUN 4072
251544 11/30/08 23:04 xqian another Hitting efficiency plot
251547 11/30/08 23:41 xqian BigBite Wire Chamber Gas Start Bubbling
251554 12/01/08 00:20 xqian Another hitting efficiency plot
251564 12/01/08 02:29 xqian Two more runs

keyword=Replaced argon/ethane gas bottles for BB wirechambers

I found the BB argon/ethane gas was not bubbling during run 4071. Xin was called and we found two bottles empty in the gas shed. We replaced the two bottles and checked to see if gas was flowing in the shed. The gas is flowing again in the shed but will take some time to show up on camera.