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    User name jp/xiaofeng/ameya

    Log entry time 00:02:05 on March16,2006

    Entry number 166862

    keyword=fifth laser line checked and ready to be used

    At around 10:00 pm we put the hall in laser controlled access.
    First checked the 5th laser line, the fiber end looked clean,
    saw laser light at 5A, then measured power at 10 A (2.8W) and full power 35A, 26.8W.
    Then checked alignment. This line gave slightly larger spot than the other ones. With all five lasers at 7 A, did fine tuning with the last
    mirror. Centered the spot. The overall spot is larger than the pumping cell, but not much. We decide to leave it as it is after centering. Ameya checked the 5-to-1 fiber one-leg end and air flushed
    the fiber and lense.
    We then adujusted the laser temperature to center the absorption spectra:
    Duo laser #1, 35 A, 16.7 degree C
    Duo laser #2, 35 A, 11.1 degree C
    Laser #1, 40A, 8 degree C
    laser #2, 35A, 11.7 degree C
    laser #3, 35A, 16.1 degree C (new laser line).
    The spectra should be checked again when all lasers fully warmed up.
    The first four lasers on now and 5th is ready to be used.
    Ameya is still in the hall adjusting the EPR fiber/lens. So hall is still in laser controlled access.