<br><br><div class="gmail_quote">On Wed, Dec 15, 2010 at 4:29 PM, Brad Sawatzky <<a href="mailto:brads@jlab.org">brads@jlab.org</a>> wrote:<br><blockquote class="gmail_quote">
On Tue, 14 Dec 2010, David Flay wrote:<br>
<br>
> So therefore, in the future as we look at E/p one <should> include<br>
> such cuts.<br>
><br>
> Would it make more sense to just include these cuts on E/p in the cut<br>
> definition file for the replay?<br>
<br>
Please verify that the raw ADC information is zero for these bad events.<br>
By raw, I mean the non-corrected data containing the raw bin value<br>
returned by the 1881 hardware.<br></blockquote><div><br></div><div>Attached you'll find an *.eps file containing plots of a typical ADC spectrum (block index #7 of PRL1 and PRL2) with various cuts (explained in the title of the graph). We can see that the majority of events that had a bad momentum (p = kBig) are accounted for here (when E/p ~ 0).</div>
<div><br></div><blockquote class="gmail_quote">
<br>
I would recommend not placing a hard cut (ie. in the cdef file) on<br>
"high-level" derived variables like this. There's too great a risk of<br>
hiding some underlying bug/problem/weirdness.<br></blockquote><div><br></div><div>True, that makes sense</div><div> </div><blockquote class="gmail_quote">
<br>
For example, at first glance, that looks like quite a few hits that have<br>
generated a trigger (ie. good hit in two scintillator planes), have a<br>
good track (correct? if not, p should be undefined), and yet don't<br>
deposit anything in either lead-glass layer. That's kind of strange...<br>
<br>
Are the usual EDTM and trigger cuts (ie. no T8 pulser, etc) in place for<br>
these plots?<br></blockquote></div><div><br></div>I forgot them in those previous plots, but they are applied to all histos in this file. <br clear="all"><br>-- <br>-----------------------------------------------------------<br>
David Flay<br>Physics Department<br>Temple University<br>Philadelphia, PA 19122 <br><br>office: Barton Hall, BA319<br>phone: (215) 204-1331<br><br>e-mail: <a href="mailto:flay@jlab.org">flay@jlab.org</a> <br>
<a href="mailto:flay@temple.edu">flay@temple.edu</a><br><br>website: <a href="http://www.jlab.org/%7Eflay">http://www.jlab.org/~flay</a><br> <a href="http://quarks.temple.edu">http://quarks.temple.edu</a><br>
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