[Sbs] GEM readout abstract

[Alexandre Camsonne]

It seems deadline is July 8th now so I can revise it for a few days.

I submitted it to Kondo MGPD mini symposium

The SuperBigBite spectrometer at Jefferson Laboratory in Hall A will
rely on Gas Electron Multiplier trackers to achieve the required
luminosity for large momentum transfer experiments. The readout
electronics is based on the APV25 ASIC and the INFN VME board Multi
Purpose Digitizer (MPD) Board.  By using the optical readout of
readout of the boards, all boards can be readout in parallel
effectively increasing the data bandwidth for one crate by more than a
factor of 10. With such scheme the readout of several samples become
possible and background rejection can be applied to reduce the large
quantity of data due to the high occupancy of detector before it is
recorded. This special readout scheme based on the JLab electronics
will be presented along with the online data reduction strategy for
the GEM data.