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CLAS Large Angle EC

CLAS Large Angle EC. 2 sectors, 33 layers each, 19 m 2 total area 0.2cm (0.35X 0 ) thick lead 1.5cm thick scintillator , 10cm wide, various length (2.2-4.5m). Can it be used for SoLID ?. Possible way to do it Total area similar cut it into small sections and hold the structure

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CLAS Large Angle EC

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  1. CLAS Large Angle EC • 2 sectors, 33 layers each, 19 m2 total area • 0.2cm (0.35X0) thick lead • 1.5cm thick scintillator,10cm wide, various length (2.2-4.5m)

  2. Can it be used for SoLID? • Possible way to do it • Total area similar • cut it into small sections and hold the structure • Separate preshower/shower stacks • Use clear fibers on side of scintillators for readout or use WLS fibers for readout • Concerns • Due to high rate, how small do the sections need to be? How many number of readout channel we can save? • Radiation hardness could be less (need 500krad) • Performance could be worse (need 100:1 rejection) • Cost? (comparing to about $2.5M for module)

  3. Other things • Use scintillator for pad preshower • Use lead layer for pad preshower • 318 EMI Thorn EMI 9954A 2” PMT • Any fiber to use?

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