On Sat, Mar 27, 2010 at 11:36 PM, Brad Sawatzky <<a href="mailto:brads@jlab.org">brads@jlab.org</a>> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote">
There are a number of things that puzzle me about these plots:<br>
a) The x-range populated in the Beta vs. x plot is quite different<br>
(smaller) than the x-range populated by the s1 and s2m plots. Why?<br></blockquote><div><br>I double checked my script -- I'm missing some cuts on the S1, S2m vs. track-x plots. See attached.<br>(I have all my 'good event' cuts on beta vs. track-x, and forgot them on S1, S2m vs. track-x. The cuts match now.)<br>
<br></div><blockquote class="gmail_quote">
b) S1 is supposed to have 6 paddles, yet there are far more than 6<br>
discrete regions showing different structure in the S1 plot. </blockquote><blockquote class="gmail_quote">
c) Judging by the extent of the offset regions in the S1 vs. X plot, I<br>
can convince myself that there are at least 14 discrete "blocks"<br>
plotted, if I count the little blips at the far edges then I get 16.<br>
d) S2m carries the timing for the trigger L1A (which is the common stop<br>
for S1).<br>
e) Therefore, the variation seen is S1 vs. X is really paddle-to-paddle<br>
variation in the _S2m_ paddle offsets.<br></blockquote><div><br>This makes sense to me -- wouldn't that explain why there's so many blips in S1 time avg. vs track-x?<br><br>In which case, I can take a closer look at S2m -- however I don't know how much my tweaking of those time averages per paddle will do for the beta vs. track-x plot. I remember the effect was small, almost non-existent. I'll take another shot.<br>
<br>Also -- wouldn't (c) through (e) imply that S2m vs. track-x doesn't necessarily make any sense, since it carries the timing? Or, I should say, doesn't provide any new information? <br></div></div><br>Dave<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/~flay">http://www.jlab.org/~flay</a><br> <a href="http://quarks.temple.edu">http://quarks.temple.edu</a><br>
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