Dear Hiro, The slow turn-off time is I guess mainly because Brahvo has implemented a software mechanism for stepping down the voltages. Since the builtin decharge (in the MF) actually takes care of this, turning off (and likely turning on too) could/should be done in a single step. E.g. the 1458 has ramp voltages, so a software control is un-necessary. Yet another improvement to be done. In any case thank you. Flemming ------------------------------------------------------ Flemming Videbaek Physics Department Brookhaven National Laboratory tlf: 631-344-4106 fax 631-344-1334 e-mail: videbaek@bnl.gov ----- Original Message ----- From: "Hironori Ito" <hito@students.phsx.ukans.edu> To: <brahms-l@bnl.gov> Sent: Friday, January 25, 2002 8:12 PM Subject: HV OFF > Hello. Since the beam finally stopped and it was requested by FV, > I turn down all HV (by BRAHVO). If you did not want it to be off, you > should turn it up. I could not turn down TOFW, H1 and C1 since BRAHVO can > not connect to mainframe. (The mainframe is off???) I did not turn off > any mainframes. > > Hiro > > (NOTE: It took almost 1 HOUR to turn the HV of all detectors > down. WHY??? I almost went inside IR and turn the mainframe off by > switch. That would took me about 1 minute. The next person (including > me) may not be this patient!!!) >
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