Optics, Tracking, and TOF Status/Update/Roadmap . Xin Qian KRL Caltech. Optics. Current Optics Is based on COMGEANT simulation with magnetic field generated by Poisson. is used to study the detector resolution.
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All momentum, no resolution (example)
Show that we can do reconstruction.
We know both input and output
Resolution included, optics is performed at each momentum/angle separately.
BigBite Sieve Slit
3.1 If succeed, predict/check hit in the next plane with better optics information.
3.2 If not succeeded, go back to second step.
Use the optics information, trajectories are closely related momentum angle etc.
11 GeV, R(cm)
65% for 4/4 at 90% hitting efficiency.
Large area, high granularity. Good time resolution<100ps
High efficiency> 95% .Low cost
Predicted rate SoLID @ JLab12
BaBar: 7m, with same requirement, need <75 ps (150 ps). Will need to improve the tail with better optics, tighter TOF cut
80 ps at c gives 2.4 cm on travel length.
It is possible to reach the desired TOF resolution
Things not likely to be changed:
Distance between target and magnet
Length of calorimeter, gas Cerenkov detectors.
TOF are needed, so the distance between MRPC and target.
BABAR and CLEO Magnet can work for SIDIS
CDF will give slightly worse phase space, but can work too.
ZEUS and Hall D are similar,
Probably ZEUS will give a better phase space?