45 deg. PREX detector mechanical malfunction

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User name J. Wexler

Log entry time 04:45:02 on August25,2009

Entry number 285797

keyword=45 deg. PREX detector mechanical malfunction

During the access, I switched the PREX detectors from the 45 deg. angled quartz detector to the flat quartz detector, which is currently on the beam.

While wrapping the quartz in the 45 deg. angled quartz detector with mylar, I found the top quartz slice had moved 2cm downward, blocking the lower slice due to a mechanical error with the clamp. That issue has been fixed and the quartz is wrapped in mylar. Pushing the quartz back into place has introduced some streaking in the optical grease.