Target Holding field messed up by wired Bigbite setting, Pol -> 10%, target -> empty, test pumping up with new laser

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User name Jin

Log entry time 21:06:12 on November 11, 2008

Entry number 248236

This entry is a followup to: 248222

keyword=Target Holding field messed up by wired Bigbite setting, Pol -> 10%, target -> empty, test pumping up with new laser

It appears someone turned Bigbite magnet ON around 3:30PM without Halog or letting target people know. Even worse, the Bigbite current is set to 100A, rather than standard 710A, which caused a false field correction.

Bigbite field change caused target field shift by 3G, which basically kicked NMR peak to the edge of sweep, and introduced high polarization loss. Pol =~10% now!

Target is moved back to empty location to start pumping. Bigbite field is reset to 0A.