Compton Meeting, September 28, 2011

Agenda

Laser

1. Cavity noise characteristics study

JLab VtoF and scaler appears to broaden the cavity power width significantly (comparing with fADC measurement of the same signal.)

• https://qweak.jlab.org/elog/Laser/120
• https://qweak.jlab.org/elog/Laser/121

If this latest width holds out then the new cavity width will be a negligible contribution to the photon detector width.

Photon Detector

1. LED linearity system
2. Detector
   1. Cooling system update

Electron Detector

1. Source tests

https://qweak.jlab.org/elog/Electron+Detector/252

DAQ

1. BPM/V2F issue

Attendance

On site: Mark, Don, Wouter, Amrendra, Arthur, Vardan Off site: Jeff, Kent

Minutes

Laser

1. After much discussion

Photon Detector

1. Have data with snapshots over the LED pulse. Data taken with varying LED intensity and the phototube so first linearity data now available.
2. Detector cooling results looking good at 14 degrees C. Actual data to follow.