PREX/CREX Thursday, August 14, 2014 10:00am EDT

The teleconference info is as follows:

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

Agenda

Updates from Rakitha : Neutron Shielding Comparison : Polythene vs. Water elog-2652
Updates from Nickie : Optics Plan elog-2653
- Updates from Guido : Focal Plane from snake [1]

Present:
Rakitha, Paul, Nickie, Paul, Dustin, Kent, KK, and Seamus

Water vs. Poly discussion
Proceed with Water shielding inside the scattering chamber
- Talk with Al about the geometry/design considerations
Possibility of dissolving Borax in water to absorb more neutrons : need to consider about rusting and other issue with using Borax
- Can we put a Borax+water solution in the hall in beam conditions?
The reduction in neutron power and flux after the shielding area (see Table 3 in elog 2952) could be due to missing neutron reflections with poly
There could be some resonance activity in Oxygen at around 10 MeV neutrons, which could account for reduction in neutron power at this energy range of 1<E<10 MeV. It is only a reduction in energy and a slight increase in the neutron flux but within errors.
Possibility of using glass containers with Aluminium jars filled with water inside the scattering chamber
Optics update by Nickie
As a short term goal, use Jixie's G4MC to test CREX optic tune because Jixie has already implemented the target and septum for the CREX
- This will give a chance to get familiar with the code in short term
- Also this should provide the missing information about the detector footprint like size of the plane and etc.
Once the code is setup, PREX setup will be coded. This include the target and septum
Sent out a doodle poll to decide the meeting time

We need to have an estimate of how much coulombs used for PREX-I data and an estimate for PREX-II to determine effectively how much more beam time we will use.
Have a optic calibration run plan (discussed in 01/16/2014 meeting)
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