[Moller_intdet] Detector Simulations

[Michael Gericke]

Hello,

As discussed in previous phone conferences, the most important work to 
be done
on the detector development front at the moment is to simulate the 
detector region
as completely as possible.

This includes (in order of urgency):

1) Full background implementation in the detector region (E&M and Hadronic)
2) Implementation of an initial design for detector mounting and PMT 
shielding
3) Implementation of an initial design for the beam line in the detector 
region
4) Implementation of an initial design of the mounting and shielding 
geometry immediately down stream of the detectors region
5) Implementation of the reference design detector module geometry and 
optical processes (this can only really be optimized after
     item 1 is implemented and item one depends on items 2 - 4 )

Without these, we can have no hope of arriving at a viable detector design.
For example,  with the current light guide reference design, the tests 
regarding
signal from the light guides due to electrons going through the light guide
gives us only a partial idea of the corresponding dilution. A complete 
picture
and the actual viability of the current design can only emerge after we 
have
studied this with the full background physics implemented in the 
simulations and
ideally further testing the design at facilities that provide hadrons 
(maybe at
TRIUMF or other facilities mentioned by Nevin and Dustin).

This is a big job and we have several people are already active in this 
regard.

As far as I am aware, we have:

Detector module geometry and optical simulations: Wouter + Student, old 
non-GDML implementation exists from Peiqing
Backgrounds (in general): Rakitha

After discussing with Rakitha and realizing that he is rather over 
committed already,
I asked Juliette to get her new graduate student Sakib Rahman started on 
the
background simulations in the detector region. This may also include 
working on
implementation of some initial mounting/shielding scheme, of which the 
most important
aspect is the proposed lead cylinder to shield the PMTs. I'd like to ask 
Sakib and Rakitha
to communicate with each other about this and to keep Seamus in the loop.

Thank you,

Michael
(For the MOLLER integrating detector working group)




-- 
Michael Gericke

Associate Professor

University of Manitoba
Department of Physics
30A Sifton Road, 213 Allen Bldg.
Winnipeg, MB R3T 2N2, Canada

Tel.: 204 474 6203
Fax.: 204 474 7622