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Dear all, <br>
<br>
I have posted files from Cristian Peña´s studies at <br>
<br>
<a class="moz-txt-link-freetext" href="http://www.jlab.org/~brooksw/pics/">http://www.jlab.org/~brooksw/pics/</a><br>
<br>
It will be helpful if you take a look at them <b>before</b> the
meeting. <br>
<br>
The idea is to identify the volumes where the background gets made.
Some sources are irreducible (e.g., the radiator) and others could
still be improved a big (e.g., the blocker). Since the background can
come from particles produced from the incident beam, or from
secondaries, tertiaries, quaternaries, etc., he has broken part of the
study up into 'generations.' Thus, a particle causing a hit in a
sensitive volume might have had a causal 'grandparent' in a volume
upstream, etc. He shows a matrix of the causative volume vs. the
particle type for 4 generations of particles in the four folders found
at the link above. <br>
<br>
Needless to say, it requires a little study to comprehend these plots,
and it will be easier to understand if you take a look at it before the
meeting. The volumes are identified by numbers. A partial dictionary is
below:<br>
<br>
1 tag_mag_log (12)<br>
8 vacbox_log (21)<br>
9 floorL1_log (10)<br>
929 cryoring_log<br>
930 coll_log (14)<br>
960 blocker_log (46)<br>
981 condenser_log (52)<br>
<br>
second and third generation<br>
958 hbag2_log<br>
959 hbag1_log (50)<br>
<br>
forth generation<br>
983 target_log<br>
984 target_mylar_log (50)<br>
<br>
Thanks,<br>
<br>
-
Will<br>
<br>
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