Re: simulation plans

[Richard Jones <richard.t.jones@uconn.edu>]

Jim and all,

Before we get started with further design tweaking, I suggest that we 
standardize to a single reference geometry.  Right now we are working 
with a number of incompletely updated geometries, including residual 
fragments from the 2-magnet design.  I think that all of the details 
that we need are present right now in Tim's drawings.  What we need to 
do is to gather all of these parts together and put them into the 
standard geometry in subversion and tag it with a release number.  I 
would like to check it over carefully myself for consistency.  Once that 
is done, then we can move on from there with further refinements, such 
as the ones you mention.

Shall we have a meeting this week at the regular time and discuss these 
plans?

We also have a number of issues to discuss with regard to preparations 
for the diamond measurements at CHESS next spring, and initialization of 
contacts with industry for diamond thinning.  As of now, we still have 
not obtained the diamonds from Glasgow that we plan to use for these 
studies.

Richard Jones


Jim Stewart wrote:
> Hello Richard
>
> Alex and I were discussing what studies still need to be done.
> Can you look this over an let us know what you think?
> Jim
>
> For Alex
> ===================================
> Pair spectrometer:
> -------------------
> 1) Rotate WSF counters to the trajectory
> 2) Optimize iron shielding
>    (need to reduce weight)
> 3) Put in epoxy for coils and estimate dose
>    (need coil lifetime)
>
> collimator cave
> ---------------
> 1)taper active collimator
>
> Tagger
> -----------
> 1) Update/check geant geometry
> 2) Finish downstream chamber design
> ===========================================
>
> Yerivan
> ==========
> 0) proposal note (next visit)
> 1) Add back counters and look at coincidence rates and accidentals
> 2) Systematic studies.
> 3) Contributions to the photon energy uncertainty
>   a) multiple scattering vs converter thickness
>   b) opening angle m_e/E_gamma and dependence on the position of the 
> converter.
>   c) bremsstrahlung of e+/e-
>   d) nuclear recoil transverse momenta effects
>   e) Beam spot size (what can be done with a wire)
>   f) Converter material and design
> 4) Systematic studies of the uncertainty in the spectral shape analysis
>   Beam parameters
>   spectrometer resolution
>   circular polarization?
>   diamond parameters
> 5)Endpoint calibration precision
> 6)amorphous radiator measurements
>   relative efficiency acceptance calibration
> 7) 6 vs 12 counters for the WSF?
> 8) Counter design and testing?
> 9) Vacuum chamber design?
> 10) Targer and holder design
> 11) MOU!
>
>
>