For 5/30 C shift:
Around 9:30pm, got the beam to measure the RF effect of the
storage ring to the lenses. No obvious effect was observed
-- the signal picked up by the HV cable from lenses was only
1dbm bigger than the noise picked up at D tunnel.
Current from each lenses was measured again. Several nA
was got from the split lenses before and after Wien Filter (WF)
and from WF plates. Tens of uA was seen from the outer shell
of the spherical deflector (SD) and the plit lens before it; no
current was seen from the inner shell of SD.
Chi, Yuan, Genya,
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