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    User name D. Parno

    Log entry time 12:03:31 on August 21, 2009

    Entry number 285129


    keyword=VtoF Card #2 in Compton DAQ

    Yesterday, we took some measurements of the VtoF card output channels in the Compton DAQ. Over the years it has become unclear which channel corresponds to which signal. During these short runs, there was no beam in the hall, but we were flipping the cavity. Thus signals relating to beam characteristics will be junk, but signals relating to the cavity will not be.

    Here's a summary of what we found for the eight output channels of VtoF Card #2 (the middle one in the crate), with time traces below. The channels are numbered here as they are on the face of the card; that is, 1-indexed.

    Channels 1-4: Noise around a high central value. Could be beam parameters.

    Channels 5-6: Cavity parameters. Reflection signal perhaps?

    Channels 7-8 (not shown): Identically zero; no noise. Unplugged at the other end, perhaps?

    A copy of this log entry has been emailed to: gbfranklin@cmu.edu, nanda, bquinn@cmu.edu, mfriend@andrew.cmu.edu

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