PREX/CREX Thursday, September 18, 2014 9:30am EDT

Link to the Meeting page PREX/CREX Teleconferences
Last meeting: PREX/CREX Thursday, September 11, 2014 9:30am 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 : Site Boundary Neutron (and other) Radiation : Initial Results elog-2954
• Updates from Nickie : G4MC, x versus p, y versus theta elog-2955

Present:
Rakitha, Nickie, Tyler, Bob, Guido, Kent, Dustin, Paul, Seamus

Minutes

• Discussion on site boundary neutron radiation elog 2954
• The main improvement for the neutron is coming from the collimator itself. Since we made the collimator transversely big, it blocks EM (High Z) and slows down neutrons.
  • Collimator is the main source as well as good moderator/blocker
• The asymmetry in forward back comes due to more high Z materials in forward direction compared the backward in our simulation

• We can estimate what is going to top by rotating the either side -> top/bottom is same as sides by symmetry?

• Update Pavel with this results and discuss about further simulation that he wants to do
  • Coordinate with Alan and Pavel to get the correct geometry ported to Radconn simulation
  • Discuss about the activation of collimator and scattering chamber area.
  • Al vs stainless steel for the scattering chamber attachment -> Lorenzo did simulation work looking at this.

• On side note : Geant4 seems to overestimate the neutrons at high energies (E> 10 MeV) compared to Fluka and MCNPX

• Discussion on PREX/CREX optics elog 2955
  • Nickie is doing G4MC calibration/benchmark simulation tests

• • Next step is to have realistic septum field for this simulation -> scaled up AMC field?

• Discussing outstanding issues
  • Check old discussions for engineering issues related to scattering chamber and attachment
  • Collaboration meeting possibly on 3rd week on November and plan for the readiness review on December
  • Dustin currently planning to put a natural calcium target in the beam
  • Spectrometer Q1 new collimation design currently Bob is working with Pavlo on this

Misc.

• Beam parasitic studies needs a to-do list

TO DO Lists

• 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