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User name Yi Qiang
Log entry time 04:59:47 on October 30, 2008
Entry number 245490
This entry is a followup to: 245476
Followups:
keyword=Update on EPR FM sweepChiranjib and Jin tested the fiber D2 output (see halog 245477), looks like with only 1 filter the D2 output is quite reasonable. Therefore the light output should not be a problem. Then they directly put a Diode w/ two filters into the enclosure and tried several other EPR FM sweeps and still found no signal. It seems we still do not have enough RF power onto the target cell. Currently we found three possiblities, 1: bad RF amplifier, 2: RF coil far away, 3: Impedence match problem. We will continue to debug this issue tommorrow starting with replacing the RF amplifier.
D2/D1 output after 1 filter
EPR FM Diode IN