[dsg-hdice] Sorry, another Emergency Help is needed
Xiangdong Wei
xwei at jlab.org
Wed Nov 18 23:57:01 EST 2020
Hi Tyler,
We successfully transferred a polarized target from DF to PD and measured target polarization there with NMR rack2, and then transferred it to IBC in UITF.
Since the NMR signal of a fully polarized target is huge, I had to use very low power, such as-40, -50, and -60dBm.
The fsNMR on the control rack did not allow me to run with those power, and sending high power instead. -30 was fine, but -50dBm was changed to -18dBm by the fsNMR VI, and -40dBm was changed to -24dBm. The error pictures are attached here. Please take a look at the fsNMR ASAP. I will be at UITF tomorrow morning to check the vi when you are done.
Since the IBC magnets are controlled by the rack2 pc also, please don’t change the magnet settings. The testing frequency range should be between 1 and 2 MHz; and power is -60, -50, -40, and maybe -30, to avoid accidentally de-polarize the target. The IBC solenoid is at ~0.9Tesla.
Thanks,
Xiangdong
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