PREX/CREX Monday, March 16, 2015 3:00pm EDT

The teleconference info is as follows:

       Phone #: +1-888-240-2560 or +1-408-740-7256 and See International Numbers
       Code: 174599135

Agenda

Updated from Nickie : theta, and theta versus p at PREX focal plane, DATA elog 2970

Present:
Bob, Seamus, Yuxiang, Ciprian, KK, Nickie, Paul, Kent

Nickie's elog 2970 shows angular distribution at the VDC plane for PREX-I data, He will make a follow up post with detector plane angular distribution
- It would be nice to see the angular distribution with respect to central angle (45 deg.) at the detector plane.
This angular distribution is important to look at as current PREX-II detector design-3 is more sensitive to the angular distribution
We also have to consider about the transverse asymmetry effects on the detector plane.
The angular distribution and transverse effect needs to be understood with new quard replacements in HRS
In PREX-I we empirically understood the transverse contribution using a detector placed at a region sensitive to transverse contribution

Engineering update from Kent,
- Now engineering efforts are focused to APEX and SBS and now is a good time to address some of issues requiring engineering time,
- This include,
  - How to insert the collimators, transversely or horizontally. Our original idea was to insert it from top. see minutes on Minutes
  - Rolf's idea of using a new narrow (long) scattering chamber
Using a new narrow (long) scattering chamber would require two target ladder systems for PREX and CREX
- Bob and Kent will post elogs with showing a crude design diagram
- Bob will talk to Dave Meekins and Siviu about the new scattering chamber
- We would like to have a solidworks (CAD) drawing for this proposed scattering chamber design
  - Talk to Dustin about making a design using his or his student's CAD skills
- We have to come up with list of upgrades (new purchases or new designs) that will be required by this new scattering chamber design
- How to deal with optics targets and water cell target?
We will not need long scattering chamber design for CREX as Dave Meekins have a way to keep Ca target isolated without elongated windows. see minutes on Minutes

It would be nice to have real-time viewer for optics studies in commissioning (disussed in 01/16/2014 meeting)

TO DO Lists link: PREX, CREX