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Larry Passell wrote:
<blockquote TYPE=CITE>Emmanuel:
<br> Thanks for your e-mail.
We're very pleased that you will join us as the
<br>MCSTAS representative. The other people involved in the intercomparison
<br>are Phil Seeger (LANL), Xun-li Wong (ORNL), Hal Lee (ANL) and Geza
Zsigmond
<br>(Hahn-Meitner). My contribution is mostly an organizational one.
I have
<br>prepared some documentary material describing the (slightly simplified)
H-8
<br>spectrometer model that will be used for the first round of
<br>inter-comparisons. There is also an outline of the model that
Xun-li Wong
<br>prepared. I'll air mail you copies of the descriptive material
I put
<br>together and ask Xun-li to e-mail you a copy of his outline.
Together I
<br>think they will give you a sufficiently clear picture of the first
phase
<br>model to set up your MCSTAS simulation. But if after looking
through the
<br>material you still have questions please let me know and I will do
my best
<br>to answer them promptly.
<br> As far as the schedule is
concerned, making these intercomparisons is
<br>obviously not the top priority of any of the people involved so it's
not
<br>realistic to set up a hard and fast deadline. I'm suggesting instead
that
<br>we try to have the first intercomparisons done within a time frame
of, say,
<br>three to four months. Basically my view is that people should move
forward
<br>at whatever speed they can. Phil Seeger, as one of the original
<br>participants, had a head start and has already completed his simulations.
<br>The others, however, are just getting their simulations together.
I'll ask
<br>Phil to e-mail you a copy of his results. You may find them helpful
when
<br>setting up your MCSTAS simulation.
<br> For the simulation you will
need subroutines for a disk source of
<br>neutrons, beam defining apertures, Soller collimators, vertical focusing
<br>pyrolytic graphite crystals (with isotropic mosaic distributions),
a
<br>vanadium (isotropic scattering) sample and a 3He neutron detector.
My
<br>understanding is that MCSTAS is able to handle all of these things
so I
<br>hope the setting up of the simulation won't be too time-consuming for
you.
<br> We look forward to an interesting
and mutually rewarding interaction.
<br>
Larry Passell
<br>################################################################
<br># Larry Passell</blockquote>
<pre>--
What's up Doc ?
--------------------------------------------
Emmanuel FARHI, <A HREF="http://www.ill.fr/tas/people/Farhi.html">http://www.ill.fr/tas/people/Farhi.html</A> \|/ ____ \|/
CS-Group ILL4/156, Institut Laue-Langevin (ILL) Grenoble ~@-/ oO \-@~
Avenue des Martyrs, BP 156, 38042 Grenoble Cedex 9,France /_( \__/ )_\
Work :Tel (33/0) 4 76 20 71 35. Fax (33/0) 4 76 48 39 06 \__U_/</pre>
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