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    User name jpchen

    Log entry time 17:20:51 on June 3,2010

    Entry number 324304

    keyword=target cool-down completed

    Target cool-down is completed. I left the J-T valve at ~40%, flow is ~8 g/s. The inlet/return temperature at the target side are 25/39K.
    They should come down in the next hour to ~20/25K or below., then will be stable.
    Scattering chamber vacuum is ~2*10-6 (one order of magnitude decreasing from cryo-pumping, normal).




    FIGURE 1