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| Workshop on "Polarized Photon Polarimetry" |
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Thomas Jefferson National Accelerator Facility
12000 Jefferson Avenue
Newport News, Virginia, 23606
June 2 - 3, 1998
Workshop Organizing Committee: W.J. Briscoe, M. Khandaker, and B.
Wojtsekhowski
Tagged linearly-polarized photons from a coherent bremsstrahlung (C.B.)
source will be available for use in experiments at Hall B by mid-1999.
Funding exists to install the C.B. facility and for development of a
polarimetry measurement technique(s). While calculations of the degree
of polarization can be easily made, these calculations have never been
tested at Jefferson Lab energies. Each of us have bragged about the
quantity and quality of the data expected from Jefferson Lab. Those of
us involved in experiments that will use linearly-polarized photons,
would certainly not wish to start an experiment in which the value of
an important experimental parameter is based solely on a calculation.
However, how do we best measure the degree of linear polarization of a
photon? This is the topic of our workshop.
The workshop will be held for two days at Jefferson Lab. The dates are
June 2 and 3, 1998. We would like to keep involvement limited to those
who have been involved with the plan to implement a linearly-polarized
photon beam here at Jefferson Lab and those who are planning to use this
beam during the first round of Hall B experiments.
The format of the first day will be a presentation format with talks on
various topics related to linearly-polarized photons, their planned use
in experiments in Hall B, and techniques in determining the degree of
polarization. We will then break up into working groups and tour Hall B
and try to visualize where and how our favorite device would fit into the
beam line. Discussions would follow within the working groups. Each group
would be asked to write up a brief report expounding the virtues and
shortcomings of the selected technique, carefully taking into consideration
experimental needs and currently available space. We expect to convene as
a whole at noon on day two. Each group will be asked to present its report
and recommendations. Hopefully by this process we might, at the end of the
presentations and follow-up discussions, arrive at a consensus.
The product of this workshop will be a written report which will carry the
conclusions and recommendations of this workshop. We hope to get this report
out to the participants of the workshop within one month. After corrections
and suggestions, this report will be presented to the management for review.
We would them request that we be given the go ahead to implement and test
the
technique(s) recommended.
Program:
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Tuesday, June 2, 1998:
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Rm 47 (VARC Bldg.)
8:30 - 8:40 "Opening" -
William Briscoe (GWU)
8:40 - 9:15 "Plan for the coherent bremsstrahlung facility" -
Kalvir Dhuga (GWU)
9:15 - 10:00 "Physics with the coherent bremsstrahlung facility" - Phil
Cole (UTEP)
10:00 - 10:45 "QED Calculations" -
Leonard Maximon (GWU)
10:45 - 11:00 Break
11:00 - 12:00 "Triplet production measurements at SAL" -
Robert Pywell (SAL), and
-
Gerald Feldman (GWU)
12:00 - 13:00 Lunch
13:00 - 14:00 "Linearly polarized photons at Mainz" -
J"urgen Ahrens (Mainz)
14:00 - 15:00 "Photon polarization measurements at Japan" -
Toshimi Suda (Tohoku)
15:00 - 15:30 "Calculational results of polarization studies" -
Richard Jones (UCONN)
15:30 - 15:45 Break
15:45 - 16:15 "Microstrip detector technology" -
Branislav Vlahovic (NCCU)
16:15 - 16:45 "Pair production polarimeter proposal" -
Bogdan Wojtsekhowski (TJNAF)
16:45 - 17:15 "Coherent pair production technique" -
David Tedeschi (USC)
Wednesday, June 3, 1998:
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9:00 - 10:30 Working Group Meetings - "Pair production technique"
(Rm B207, CEBAF Center)
Coordinator:
Samuel Danagoulian (NC A&T)
- "Triplet production technique"
(Rm A211, CEBAF Center)
Coordinator:
Gerald Feldman (GWU)
- "Calculational methods"
(Rm 84, Trailer City)
Coordinators:
J"urgen Ahrens (Mainz), Leonard
Maximon (GWU)
10:30 - 10:45 Break
10:45 - 12:00 Working Group Meetings - (continued)
12:00 - 13:00 Lunch
13:00 - 14:00 Tour of Hall B
14:00 - 16:00 Working Groups Presentations
(Rm 47, VARC Bldg.)
We would very much like you to participate in this workshop. If you are
able to attend, please respond to this announcement by sending an e-mail
to mahbub@jlab.org providing the following information. For those of you
who have already responded to the earlier announcements, there is no need
to respond again.
Name: ---------------------------------------------
Affiliation: ---------------------------------------------
Address: ---------------------------------------------
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