General Topics:
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o "Halo"
  - How to monitor, measure, or even detect a problem?  Qweak detector is gone... Lumi's in Hall A? 
    * Problem is specifically a helicity-asymmetric halo... lots of ways to make halo, but maybe not all care about helicity
    * Do we need a thick target + tight aperture (like qweak?) or can simpler tools be used? 
  - Develop a model (or, many alternative models) for the source
    * Limited to no information on characteristics (tail, uniform halo, longitudinal vs. transverse). 
    * limited information to source of asymmetry
    * one option: beam gas?  If in injector, what asymmetry due to Mott?
  - Develop tool to monitor/measure halo/tail magnitude and asymmetry
    * Hard, since we don't have a good idea yet what we are looking for
  - Possible questions
    * Longitudinal structure?  (Aq vs time in beam bunch using chopper?)
    * laser beam diffraction - halo vs. strength of Airy function maximum? How does it map to electron beam? How asymmetric?
  - Mostly MOLLER question
  - Possible effect on PREX, similar to "charge non-linearity" effect
    * charge monitor sees all electrons but detector sees some more than others.
 
o Injector spin manipulation
  - faster manipulation during MOLLER (~day). Improved calibrations of injector optics needed?
  - helpful for PREX also (Flips are absolutely needed, and the more and the easier, the merrier)
  - Order ~day tweaks to polarization angles to zero transverse monitoring.

o Fast Helicity Flipping
  - RTP studies at UVA
  - implement technologies for PREX if ready

o Spot Size Monitor
  - Want 1e-5 RMS width asymmetry for MOLLER, 1e-4 for PREX. 
  - PREX used linear array for laser measurement - needs refinement?
  - helicity-correlated spot-size monitor concept for electron beam?

o Laser Source configuration improvements
  - 2 PC system?
  - Laser Spot size asymmetry reduction techniques?
  - Laser spot size characterization
  - Fringing characterization / control
  - remote monitoring? (flip in/pick off)
  - Insertable vs. re-orientating upstream halfwave plate
  - Stewart platform

o Helicity-correlated air-core magnets (injector):
  - didn't span space well during Qweak (this may be fundamental?)
  - resolution may be too coarse for MOLLER

o Beam current monitoring
  - resolution
  - aperature