[BLAST_SHIFTS] Shift summary 09/16/2004 A (1-9)

From: Electronic Log Book (elog@blast05.lns.mit.edu)
Date: Thu Sep 16 2004 - 09:04:21 EDT


Operator: clasie

There were many problems this shift related to the HV GUI. It went into Exp disable by itself, it needed to be rebooted twice and for a period of time it would spend around 4min changing from standby to oper. It also got stuck in restore in progress with the beamgate off but the voltages still responded to standby and oper commands.

R24 tripped often and the voltage has just been lowered to 3830V. The guard wire at 1900V would sometimes drift to 1920V or even 1970V causing a trip. This was fixed each time by hitting standby and oper. The field and sense wires on r24 also tripped a few times.

CCR had RF problems and they needed to reduce the injection current to 97 mA. This was gradually raised and is now back at 145 mA. Technicians are now looking at the problem.



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