From: Harine, Katherine (Katherine.J.Harine@nasa.gov)
Date: Sat Aug 05 2006 - 11:57:48 CEST
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After getting anomalous results for backscatter of heavy ions, I ran =
FLUKA with a vacuum as a target. Particles went from region A to the =
target which is region B. The USRBDX detectors used for neutrons, =
protons, et cetera, gave the expected zero flux results when set for =
one-way flux counting particles which scatter back, i.e. from region B =
to region A. However, The USRYIELD card gave the same results as though =
it were counting the incident flux also. In other words, the USRYIELD =
card, which I use for determining the heavy ion flux is a two-way =
detector. Is this what is intended? The description of the entries on =
the USRYIELD card calls one region the "upstream" region and the other =
the "downstream" region. Hence I made the incorrect assumption that =
USRYIELD was a one-way detector when in fact it is a two-way detector. =
Did I miss something in the manual? Is there a way to make USRYIELD a =
one-way detector?
Thank you for any help.
- Katherine
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<TITLE>USRYIELD Card Question</TITLE>
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<P><FONT SIZE=3D2>After getting anomalous results for backscatter of =
heavy ions, I ran FLUKA with a vacuum as a target. Particles went =
from region A to the target which is region B. The USRBDX =
detectors used for neutrons, protons, et cetera, gave the expected zero =
flux results when set for one-way flux counting particles which scatter =
back, i.e. from region B to region A. However, The USRYIELD card =
gave the same results as though it were counting the incident flux =
also. In other words, the USRYIELD card, which I use for =
determining the heavy ion flux is a two-way detector. Is this what =
is intended? The description of the entries on the USRYIELD card =
calls one region the "upstream" region and the other the =
"downstream" region. Hence I made the incorrect =
assumption that USRYIELD was a one-way detector when in fact it is a =
two-way detector. Did I miss something in the manual? Is =
there a way to make USRYIELD a one-way detector?<BR>
<BR>
Thank you for any help.<BR>
<BR>
- Katherine<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
</FONT>
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