User name X. Zheng
Log entry time 05:20:33 on September 2,2001
Entry number 73277
keyword=Target - EPR photodiode replacedDuring first half of owl shift, EPR photodiode was replaced and tested. Again due to condition change in laser alignment etc.., a few components of EPR optics were adjusted to guide enough D2 light to photodiode. Three AFPs have been done for three, two and one lasers, with Vmod 0.3 Vpp. Flips look fine but one and two laser(s) configurations show higher statistical fluctuations.
Laser # ... DC(mV) ... D2(uV) ... AFP ...
5,6,7.........-170............+/- 25.....4:05am...
6,7............-120............+/- 24.....4:09am...
6...............-72..............+/- 20.....4:12am...
After sealing EPR pipe, diode signal is -220 mV for three lasers and -165mV for two lasers.
0th order fit:
4:05am
down: freq. shift = -17.82 KHz +/- 1.13 KHz
up: freq. shift = 16.92 KHz +/- 1.04 KHz
4_09am
down: freq. shift = -17.97 KHz +/- 1.53 KHz
up: freq. shift = 16.33 KHz +/- 1.33 KHz
4_12am
down: freq. shift = -16.97 KHz +/- 1.77 KHz
up: freq. shift = 16.11 KHz +/- 1.41 KHz
FIGURE 1
