[b1_ana] Fwd: PAC 41 Meeting Preparation - E12-13-011

[Karl Slifer]

---------- Forwarded message ----------
From: *Susan Brown*
Date: Tuesday, December 17, 2013
Subject: PAC 41 Meeting Preparation - E12-13-011
To: Karl Slifer <karl.slifer at unh.edu>


        Since 2006, the Jefferson Lab Program Advisory Committee has held
10 meetings to accept experiment proposals for the 12 GeV era following the
upgrade of CEBAF. As a result, we now have 59 high quality proposals with
3821 PAC days approved for running in the future. This backlog represents
7-10 years of operation of CEBAF, depending on the level of operational
support and degree of parallel running in the experimental halls. This
clearly indicates the tremendous interest in the user community for the
capabilities of the upgraded facilities at Jefferson Lab, and we are
delighted that the user community has been so responsive to our calls for
proposals. However, the Laboratory has been repeatedly advised to develop a
plan to manage this backlog, with the expectation that additional proposals
will be forthcoming in future PAC meetings.

        We have held discussions at the last 2 PAC meetings on this issue,
and have agreed with the PAC that a special meeting of the PAC should be
devoted to consideration of the priority for scheduling the already
approved set of experiments. We have decided to schedule a special PAC
meeting, PAC41, dedicated to this process.

        PAC41 will discuss the priority of already approved proposals for
scheduling during the first 3-5 years of production running (beyond
commissioning) in the 12 GeV era of CEBAF. The goal of this meeting is to
provide input to the Lab scheduling process from the PAC in order to
realize the highest impact program early in the 12 GeV running period. What
factors beyond scientific rating could be folded in to determine high
impact can be read from the PAC chair comments of the PAC39 and PAC40
reports. PAC41 will not do scheduling, but can provide the lab valuable
input.

        Prior to the meeting, the Associate Director for Experimental
Nuclear Physics, the Deputy Associate Director for Experimental Nuclear
Physics, and the 4 Hall Leaders will select approved proposals that are
expected to be ready for production running during the period 2015-2020.
Approved proposals that require additional equipment that will not complete
construction, installation and commissioning before 2020 will not be
considered. It is for this that we seek your help. Please find attached a
document (for Hall B experiments, there are sometimes two documents to
reflect that experiments may have components that cannot be run in a single
experiment or run group) filled-in by the Hall Leaders where we attempt to
summarize equipment and beam requirements, concerns or equipment conflicts,
and specific experiment requirements. Please realize that this is on
purpose coarse information, it does not matter too much which exact year
equipment or specific beam properties are anticipated to be achieved, as
this also depends on priority, what is relevant is what experiments could
be ready for physics data taking, beyond commissioning, before 2020. In the
end, we will use this information to provide the PAC with one large matrix
on rough “year-ready” of experiments, further outlining run groups and/or
potential conflicts.

        We request that you work with the Hall Leaders to converge on a
final document that roughly outlines what we need, and submit this to us
BEFORE close of business January 13, 2014.

PAC41 will then consider all approved proposals in each of the six physics
categories (see appendix) ready to take physics data in the 2015-2020
period (taking into account the earlier presented commissioning and
“year-one” physics plans in each Hall), and discuss the relative priority
of the proposals in each category. The PAC will identify a subset of these
proposals that it considers to be “Highest Priority” for scheduling during
this time frame.

Please note that we do neither intend that these designated proposals will
be the only ones available for scheduling before 2020, nor that they will
saturate the beam time available in any experimental hall prior to 2020,
but expect to include the PAC41 input as part of the usual scheduling
process. The present status (grades and approved running time) of all
previously approved proposals will not be changed by this procedure.  It is
not anticipated that the PAC will need additional input from the proposal
collaborations during this PAC41 meeting.

Appendix: Scientific Categories for Nuclear Physics Proposals
1.        The Hadron spectra as probes of QCD
 (GlueX and heavy baryon and meson spectroscopy)

2.        The transverse structure of the hadrons
 (Elastic and transition Form Factors)

3.        The longitudinal structure of the hadrons
 (Unpolarized and polarized parton distribution functions)

4.        The 3D structure of the hadrons
 (4G: Generalized Parton Distributions and 4T: Transverse Momentum
Distributions)

5.        Hadrons and cold nuclear matter (Medium modification of the
nucleons, quark hadronization, N-N correlations, hypernuclear spectroscopy,
few-body experiments)

6.        Low-energy tests of the Standard Model and Fundamental Symmetries
     (MOLLER, PVDIS, PRIMEX, …..)

Susan Brown
Phone: 757-269-7668
Fax: 757-269-5800

If you pray for rain be prepared to deal with some mud.




-- 
---
Karl J. Slifer
Assistant Professor
Department of Physics
University of New Hampshire
Telephone : 603-722-0695
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