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    User name brads

    Log entry time 16:07:18 on November25,2008

    Entry number 250715

    keyword=Added shielding to BB Cerenkov

    I added some borated plastic plates to the existing shielding around the witness PMT. The added thickness is only 3"--6" depending on postion (all that I could do for now). I'll post some photos when I get the chance.

    It's not clear to me that there is enough of the material to block a significant fraction of the neutron flux, but we'll see what happens.