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    User name Jin

    Log entry time 21:12:50 on May 28, 2009

    Entry number 277190

    This entry is a followup to: 277074

    Followups:

    keyword=Correction: Spin Rotated to Transverse- (270 degree) during down time

    There are two mistake in last post: 1.It is 270 Degree in title; 2. It's Trans- pumping in the 3rd step. Correcting them:

    1. NMR, Pol. = 58.3%

    2. Small Correction Coil: 0.9A -> 0.5A

    3. The field was rotated to Transverse+ (45-Degree-Step) and the Q-wave plates were set to "spin up" direction to pump the 3He spin to Transverse- which is anti-parallel to the field direction.

    4. Load Last Trans- Feild EPR Calibration constant (Halog 275295, 1.95 %/mV )is loaded

    5. NMR, Pol. = 56.6%. Loss is low and Confirm of sign change

    Note1: Spin signal is changed to spin -; so the active scalar bands will change

    Note2: To follow up the 1/4 plate test, Haloge#276985. The motorized plate holder angle are set to be 2degree smaller than nominal angles