To all shifters, "Do not turn off Si HV". Turning off Si HV does not help radiation damages to silicon at all. In fact, turning off Si HV without turning down low voltage causes large current in preAmp-shapper electronics and could break fuses (for safty). If it breaks, it will require someone to go into IR. Therefore, do not turn off Si HV. Hiro On Sat, 10 Nov 2001, Apache wrote: > > ------------------------------------------------------------ > Date: Sat Nov 10 23:54:12 2001, Shift: 16:00-24:00 > Supervisor: BHS, with: > Log book#10 pages 123 - 124 > > Shift Summary: > ------------------------------------------------------------ > 1: The machine was down for most of the shift. Some small > injections that all hit the wall before being cogged. Once > we were warned by MCR that the dump would be dirty - turned > off the Si just in case. At 23:30 we finally have a store. > > 2: Pedestal runs: 5755, 5756. > Data run: 5757 (started at 23:40, still running) > MRS@90, D5@4A > FFS@30, D1-D4@1/15B > > 3: No detector problems. > Truls has made an important change to brahvo - the "TPC&DC > On/Off" buttons now have a new and improved interface. You > can punch in the values that you want for the anode voltages > (TPCs) or simply write "on" (DCs) - this makes the shifters > life even easier :-) > ------------------------------------------------------------ >
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