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To: Jefferson Lab Community <br>
Subject: End of FY12 Nuclear Physics Program <br>
<br>
<br>
May 18, 2012 was scheduled as the last day of the FY12 Experimental
Physics run and hence the <br>
end the of the 6 GeV Program. We put the plan for running in
FY09-FY12 in late 2008 soon after <br>
I arrived at the lab. With relatively minor modifications, we have
been able to run the program and,<br>
with supplementary support from the Office of Nuclear Physics, been
able to include the G2P <br>
and/GEp program. During that time there have been some challenges,
but the accelerator has <br>
performed exceedingly well, most strikingly in delivering
superlative beam intensity and quality <br>
to experiments with demanding requirements such as QWeak.<br>
<br>
Nevertheless, and as might be expected, we have received requests
for extensions of the running period. <br>
<br>
In considering what to do, we have taken into account the following
factors:<br>
<br>
<blockquote>• Gains to physics and technical advances of
experimental programs. <br>
</blockquote>
<blockquote>• Difficulties that would be generated in the
logistics and staffing of the upcoming Long Shutdown <br>
particularly associated with operation of CHL and testing of
C-100 cryomodules.<br>
</blockquote>
<blockquote>• Increased costs associated with the way utilities,
including electricity demand charges, are contracted. <br>
This is to be taken with the prospect of a difficult FY13
budget.<br>
</blockquote>
<blockquote>• The desire to move as quickly as possible towards
the 12 GeV era. The current schedule, even with the <br>
extension of the shut down from 12 to 16 months will support
meeting the CD4A goals and allow us to <br>
start commissioning the accelerator in late 2013 and to move
to commissioning of beam to Hall A, <br>
and then Hall D, soon thereafter<br>
</blockquote>
<br>
In the end we have decided to leave the current schedule as it
stands. <br>
<br>
Notwithstanding the above the PEPPo Experiment, which has minimal
negative impact, will run in the injector <br>
during the first weeks of the shutdown.<br>
<br>
<br>
<br>
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