[d2n-analysis-talk] Fwd: LHRS Scintillator Calibration Study

[Brad Sawatzky]

On Wed, 03 Mar 2010, David Flay wrote:

> I am having a strange problem... if I check the scintillators for
> different momenta, it seems all good for elastic run 1229, and 20145
> (p = 0.6 GeV, 5-pass -- as opposed to 4-pass that I showed you just
> now).
> 
> However, with seemingly increasing momentum, I get strange behavior
> (particularly in S1 time avg) -- see attached plots.  Note -- beta
> also isn't that consistent as p changes..

I assume you're refering to the second band in the S1 time average at
67ns.  That is usually indicates that you're histograming two different
trigger types: ie. T3, T4.  Double check that your trigger cut is doing
what you think it's doing.

-- Brad

-- 
Brad Sawatzky, PhD <brads at jlab.org>  -<>-  Jefferson Lab / Hall C / C111
  Ph: 757-269-5947 -<>- Pager: 757-584-5947 -<>- Fax: 757-269-7848
The most exciting phrase to hear in science, the one that heralds new
  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov