Thomas Jefferson National Accelerator Facility Page 1 IPR June 26-28, 2007 Tagger microscope R&D: silicon photomultiplier tests integrate pulsesintegrate pulses create spectrumcreate spectrum LED pulser (485 520 nm) dark box Thermal controller 20º +100º C SiPM 1.resolution 2.dark rate 3.gain 4.PDE vs T, V bias vs T, V bias measurements taken of: 1 mm 2 4 mm 2 attenuator charge collected (p.e.) events
Thomas Jefferson National Accelerator Facility Page 2 IPR June 26-28, 2007 Tagger microscope R&D: silicon photomultiplier tests
Thomas Jefferson National Accelerator Facility Page 3 IPR June 26-28, 2007 Beam Line Instrumentation: Active Collimator Full-scale prototype: 8 sectors 4 quadrants 200 m res. Beam test: Spring 2007 Hall B alcove parasitic
Thomas Jefferson National Accelerator Facility Page 4 IPR June 26-28, 2007 Beam Line Instrumentation: Active Collimator Beam tests in Hall B (2007) collimated coherent beam photon beam spot ~5mm rms fixed beam, scan the detector (horizontal direction only) left sector right sector detector current horizontal scan position
Thomas Jefferson National Accelerator Facility Page 5 IPR June 26-28, 2007 Photon Source: Thin diamond R&D at CHESS ccd X-ray camera ccd X-ray camera diamond target ladder diamond target ladder 4-circle diffraction goniometer X-ray diffraction: assess crystal quality of diamond radiators for the coherent brems. source. Result: large stress deformation observed in the 20 m diamond