From davidl@jlab.org Tue Mar 22 10:45:47 2005
Date: Tue, 22 Feb 2005 11:57:06 -0500 (EST)
From: David Lawrence <davidl@jlab.org>
To: Dustin Mcnulty <mcnulty@jlab.org>
Subject: Re: primex scaler bank events


Hi Dustin,

	I just took a quick look at the Trigger Supervisor parser routine.
I don't think it can be a translation table problem since that is only
used to say that the data came from the Trigger Supervisor. Since we are
definitely getting TS data in other events, the translation should be OK.

	If you aren't seeing any messages claiming "Bad TS event size:"
then that data is probably lost.

	The alternative is to look at the TRIGT bank and use the TDC
information to do what you want. It may actually be more accurate since
that will tell you the exact rate at which each trigger is firing. (The
scalers have an inherent deadtime which is at least the width of the
pulse.)

Regards,
-Dave

------------------------------------------------------------------------
  David Lawrence Ph.D.
  Staff Scientist                 Office: (757)269-5567   [[[  [   [ [       
  Jefferson Lab                   Pager:  (757)584-5567   [  [ [ [ [ [   
  http://www.jlab.org/~davidl     davidl@jlab.org         [[[  [[ [[ [[[
------------------------------------------------------------------------


On Tue, 22 Feb 2005, Dustin Mcnulty wrote:

> Hi Dave,
> 	For now, the main purpose for looking at the scaler bank was to
> calculate the livetime using an alternate method (the so-called
> "event-method") and compare it to the "time-method" (live1/live2).  We
> were also thinking about using it the same way CLAS uses it in their flux
> analysis, that is to use it as a regular mtime marker and break up the
> flux intervals into scaler readout intervals (every 10 seconds or so), but
> we could just as easily use the clock triggers for this ( and I believe
> Aram is in fact using the clock triggers in this way.)  So the short
> answer is to use them for an alternate livetime calculation.  What do you
> think about all of that?  Also, are you saying that these banks do not and
> will not ever exist?
> 
> Thanks,
> Dustin
> 
> Dustin McNulty
> TJNAF B16, Rm95
> 12000 Jefferson Avenue
> Newport News, VA 23606
> Phone: (757) 269-5023
> 
> On Tue, 22 Feb 2005, David Lawrence wrote:
> 
> >
> > Hi Dustin,
> >
> > 	All right. It looks like that info may not be there. I'm still not
> > clear on what you were needing this information for. There may be
> > alternatives depending on what role you want these missing scalers to
> > play. We can get together sometime today to discuss it. Just let me know
> > when you're available.
> >
> > Regards,
> > -Dave
> >
> > ------------------------------------------------------------------------
> >   David Lawrence Ph.D.
> >   Staff Scientist                 Office: (757)269-5567   [[[  [   [ [
> >   Jefferson Lab                   Pager:  (757)584-5567   [  [ [ [ [ [
> >   http://www.jlab.org/~davidl     davidl@jlab.org         [[[  [[ [[ [[[
> > ------------------------------------------------------------------------
> >
> >
> > On Tue, 22 Feb 2005, Dustin Mcnulty wrote:
> >
> > > Hi Dave,
> > > 	I checked into the scaler bank issue and I cannot find any runs
> > > with the scaler bank nrow greater than zero.  I looked through all the
> > > lead runs (about 85 or so) between 4882 and 5330.  So what do you think we
> > > should do?
> > >
> > > Thanks,
> > > Dustin
> > >
> > > Dustin McNulty
> > > TJNAF B16, Rm95
> > > 12000 Jefferson Avenue
> > > Newport News, VA 23606
> > > Phone: (757) 269-5023
> > >
> > >
> >
> >
>