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Program Advisory Committee (PAC)

PAC11 Call for Proposals

PAC11 and Call for Proposals:

The Program Advisory Committee (PAC11) will consider new proposals, updates, and Letters-of-Intent. PAC11 will also review the plans for experiments in the three Halls. PAC11 will meet in late January or early February 1997. The JLab Technical Advisory Committee will make comments on the technical viability of the proposals and provide these comments to the spokespersons and the PAC prior to the meeting. As always, proposals will be judged on the quality of the physics, technical feasibility, and the ability of the group to carry out the proposed measurements.

Guidelines for New Proposals, Updates and Letters-of-Intent:

The CLAS Collaboration in Hall B indicated that they preferred not to submit any proposals for this PAC meeting and they requested that there would be a PAC meeting in the Summer of 1997 as they are completing the installation of the CLAS at the present time. Hermann Grunder, Laboratory Director, has concurred.

Hall A has indicated that they are encouraging Users to focus on commissioning their equipment rather than writing proposals for this PAC. Therefore we are anticipating only a modest number of proposals from the Hall A collaboration.

New proposals requiring beam energies up to 6 GeV will be reviewed by the PAC.

Beam Time:

The beam time request should be provided in some detail. The beam requirements list, on your attached form, should include all of the time for which you want beam on target including any commissioning time. Do not request any contingency time as the scheduling process includes this time. The proposal should also have a detailed table with all of the requested times in the following categories:


If your collaboration has an approved experiment, a conditionally approved experiment, or a deferred experiment, and you would like to modify the physics goals, significantly change your running conditions, receive reconsideration of your scientific rating, or achieve full approval for a conditionally approved or deferred experiment, please submit an update.

Note: The PAC may or may not choose to hear an oral presentation for the updates depending on the scope of the proposed changes.

Deferred experiments

Normally, deferred experiments must be updated within one year or they become rejected. However, with the focus currently on commissioning Hall A and installing equipment in Hall B, deferred experiments from PACs 8, 9 or 10 for Halls A and B may if they wish delay updating their proposals until PAC12 in the Summer of 1997.


Letters-of-intent are submitted to solicit the evaluation by the PAC of a new line of research before investing the large effort required to prepare a full proposal. In general, the Letters-of-Intent will involve either a major new experimental apparatus or extension of present beam properties. Letters-of-Intent will be made public after receiving PAC appraisal in the same manner as full proposals. This means that the research program contained in them would enter the public domain; therefore, the Letters-of-Intent mechanism cannot be viewed as a means of "staking out territory." Rather, it provides experimenters with feedback at an early stage on the PAC's views on the scientific and technical merit of an idea which the experimenters intend to develop into a full proposal.

Due Date New Proposals, Updates and Letters-of-Intent

Proposals, Updates and Letters-of-Intent are due in the User Liaison Office by close of business Wednesday, December 18, 1996. Faxes will not be accepted. If you would like to experiment with submitting your proposal electronically in either HTML, PDF or postscript format, please contact the User Liaison Office by December 11, 1996. We will test our ability to locally acquire and print a draft of your proposal. If successful, you may submit your proposal electronically by 3:00 p.m. on the due date stated above.

All proposals and updates to be considered by the PAC must also include a completed:

These sheets will be available by November 1, 1996 under PAC11 at or via anonymous ftp at in pub/pac/attachments in PDF and postscript formats.

You may also request that they be mailed to you by contacting the User Liaison Office via phone (757-269-7586), fax (757-269-7003) or e-mail (

Note, many of the one-page summaries of the currently approved and conditionally approved experiments, a calendar including the Accelerator and experiment schedule, and this call (by November 1, 1996) are available at