tofr almost went "yellow"

Date view Thread view Subject view Author view Attachment view

From: W.J. Llope (llope_at_physics.rice.edu)
Date: Fri Mar 07 2003 - 11:56:32 EST

hi steve,
        yesterday evening there was a note in the shift log
about tofr currents "going yellow"
http://online.star.bnl.gov/apps/shiftLog/logForDay.jsp?day=3/6/2003
see entry 19:30

anyway, the shift crew correctly interpreted this as "not a problem"
since other backgrounds in star were quite high at that time.
tofr's currents went down again shortly thereafter, as they always do...

i called the control room and described all this to carl (shift leader
then) but this isn't noted in the shift log...

the question is: maybe the setting of 200 for tofr HV
going yellow is too tight?

we don't want tofr to be alarming at the beginnings of spills.
we already know tofr can see a fearsome rate at those times,
and the detector recovers perfectly each time as soon as
the spill calms down...
so these high-intensity periods (~5min) when there are new
spills should not trigger tofr alarms... that would just
distract the shift crew (and there's not really any problem there)...

maybe increase this setpoint? (and for the red too?)

comments anyone? thanks
        bill

At 2:18 PM -0600 3/6/03, gronstal_at_creighton.edu wrote:
>TOF has its own link added now. Let me know of any further things that
>can be done for the TOF system.
>
>steve 

-- 

  W.J. Llope, Ph.D.                      Res. Assoc. Professor
  T.W. Bonner Nuclear Laboratory         phone:  713-348-4741
  Rice University, MS-315                fax:    713-348-5215
  6100 S. Main St.                  
  Houston, TX 77005-1892            
             e-mail:     llope_at_physics.rice.edu
             WWW home:   http://wjllope.rice.edu/default.html

--
Date view Thread view Subject view Author view Attachment view

This archive was generated by hypermail 2.1.4 : Thu Jul 24 2003 - 00:39:37 EDT