Re: simulation plans

[Alexander Somov <somov@jlab.org>]

Dear all,
I think that it wold make sense to have a meeting
during this week and discuss evrth.
Cheers,
        Sascha


On Mon, 1 Dec 2008, Richard Jones wrote:

> 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!
>> 
>> 
>> 
>
>