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Andrew and Pavel,<br>
There is no need for filler experiments at CEBAF. There is a
7-10year backlog of approved experiments. Halls B&C are still
under construction as Andrew says, however the ability to perform
experiments in those halls will be severely constrained by the 12
GeV Project (installation), the lack of an ARR means the beam energy
must be below 6GeV and the approved NP experiments (HPS and PRAD in
Hall-B) that are scheduled to take data in parallel with Hall-B
installation activities. <br>
<br>
I see three options:<br>
<ol>
<li>Propose an experiment to the PAC. Tie the measurements to
better radiation modeling. I presume the number of PAC days
(beam time) is short.</li>
<li>Work with a Hall leader to include targets of interest on
their target ladders and convince them to provide some beam
time on those targets during an experimental run</li>
<li>Work out a package for the BSY dump</li>
</ol>
Option 1 & 3 are long'ish lead option, item 2 will require
making your case to the hall leader, convincing them that the
radiation field will not damage the hall equipment.<br>
<br>
Option 3 will provide a long term solution (but beam energy to the
BSY dump is capped at about 7 GeV since the project did not upgrade
the BSY dump line). About 12 years ago I proposed a diagnostic
test stand in that area but this effort did not succeed due to an in
ability to demonstrate that it would be "safe". Space is cramped
and access is limited during nominal NP operations. <br>
<br>
Arne<br>
<br>
<div class="moz-cite-prefix">On 02/18/2016 05:24 PM, Pavel
Degtiarenko wrote:<br>
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<div class="moz-cite-prefix">If there's a need in filler
experiments, I think we have the best program -- measurement of
electronuclear cross sections for isotope production /
activation at high energies -- (almost) ready...<br>
-Pavel<br>
<br>
On 02/18/2016 04:23 PM, Hutton Andrew wrote:<br>
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Vashek
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<div class="">The Hall detectors are not all ready and we are
trying to find filler experiments that they can do. Can you
think whether you could carry out an opportunistic program?
This would not be a hard experiment for the operators to do.
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<div class="">Andrew</div>
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<br class="">
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