TAzz Working Meetings
Proposal
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Current Version: Proposal v 0.914
Proposal v 0.909 (Hall C Invitation Version)
Proposal v 0.905 (Invitation Version)
All proposal files on github (azz.pdf is the proposal)
(Download link near bottom of the right column)
Click here for a log of edits and changes to the proposal
Send Ellie your comments, edits, or github username to be added as a collaborator
AGENDA
Ellie,
As I hope you've heard, the stray fields from the SHMS are a problem, discussed in http://arxiv.org/abs/1406.7856 . One needs to look at its figures 6 and 7 in concert with your Table 1 to decide whether your kinematics will cause a problem. Qualitatively, it seems to me that the 2.2 GeV setting is OK but the 6.6 and 8.8 GeV will require mitigation. Two are possible:
a. Dave Gaskell and I have arranged for a 1m horizontal dipole to be placed just upstream of the Hall C diagnostic girder, ~5m from the pivot, to pre-bend the beam in a manner to compensate for SHMS stray fields. This will complicate data analysis.
b. iron shielding as discussed in the arxiv posting and shown in figure 10. Unfortunately, this is a long, high-Z, secondary target. What that will do in the detector huts I don't know. No engineering has been undertaken AFAIK.
I suggest some discussion be included in the proposal. Failing that, I'll include something like the words above in my TAC report to Rolf.
I found this problem two years ago while reviewing for TAC a proposal on the NPS (Neutral Particle Spectrometer) which dismissed the stray fields of its resistive dipole by saying it was just like the SHMS bender and so couldn't be a problem. Both were.
Jay
| Presenter | 05/08/2015, 10:00am ET (Minutes) |
| E.Long |
Smearing the elastic peak to match spectrometer resolution Needs: Ellie's To-Do: |
| Presenter | 05/01/2015, 10:00am ET (Minutes) |
| E.Long | Elastic Cross-sections and T20 11 GeV or 8.8 GeV? Worked on T20 Experimental Method, Uncertainty Estimates, added PAC42 Comments and Concerns, and added new dilution factor plots to proposal (linked above) Needs: ◻ Wim's calculations, with few paragraphs of explanation ◻ Dustin's tech note & tech note number ◻ Updated Mark & Misak curves for 11 GeV ◻ Elastic 6-quark calculations from Gerry? ◻ Statement from Wally ◻ Encouraging statement from UVA on current status of tensor target development ◻ Mark and Misak re-read of Section 1, to ensure theory is up-to-date ◻ Everyone to read through Response to PAC42 section Ellie's To-Do: ◻ Update systematics section to include aspects from Dustin's tech note ◻ Add T20 background section ◻ Call for authors ◻ Double-check of T20 statistics calculations ◻ Add T20 plot to proposal ◻ Update kinematics for elastic, maybe 11 GeV ◻ Update Summary |
| Presenter | 04/24/2015, 10:00am ET (Minutes) |
| E.Long | Relating Azz and T20 Updated Kinematics |
| Presenter | 03/27/2015, 11:00am ET (Minutes) |
| E.Long | 11 GeV Beam, t20, and Size of Small Azz |
| Presenter | 02/26/2015, 11:00am ET (Minutes) |
| E.Long | Deuteron Form Factors Parameterization Proposal on github (Download link near bottom of the right column) Send Ellie your github username to be added as a collaborator (Doug, Karl, & Patricia already on) Rates code on github |
| Presenter | 01/29/2015, 11:00am ET (Minutes) |
| E.Long | Overview of Azz TAC/PAC Responses LOI12-14-002 Misak and Mark's Proceedings with updated Theory Plot |
| Presenter | 05/29/2014, 3:00pm ET |
| E.Long | Discriminating Power |
| Presenter | 05/23/2014, 3:00pm ET |
| E.Long | Proposal Updates Reproducing Frankfurt & Strikman's Azz |
| Presenter | 05/16/2014, 2:00pm ET (Minutes) |
| E.Long | Target Modifications (Pzz=20, 25%; extended target) Reproducing Frankfurt & Strikman's Azz Proposal Updates |
| Presenter | 05/09/2014, 3:00pm ET (Minutes) |
| E.Long | Proposal Organization |
| Presenter | 04/18/2014, 3:00pm ET (Minutes) |
| E.Long | 24 Day Q^2 Scan Measurements TAzz Proposal Repository |
