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    User name M. Liang

    Log entry time 00:59:07 on October 21,1998

    Entry number 3231

    keyword=EPR photodiode

    The EPR photo diode is taken out. We replaced it with the old one, which had see
    n beam already for two weeks and is showing sign of radiation damage. The first plot in the figure included are the derivative lineshapes measured for the old one and new photodiodes. The new one is definitely better in both the shape and the noise level. We will place the new photo diode in only during serious EPR measurement and should be taken out immediately afterwards.

    FIGURE 1