User name Seonho Choi
Log entry time 10:40:20 on June30,2001
Entry number 65093
Followups:
keyword=Hall A BCM & Beam Current RampingWe have observed several instances when Hall A bcm drops to zero even though there are no beam trips. When this happens, slits start to close but Hall A bcm returns to normal immediately and the slits start to reopen, generating sawtooth shape in beam current. I have copied a sample plot from Hall A BCM current monitor.
FIGURE 1
