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User name Armstrong
Log entry time 07:19:35 on June22,2004
Entry number 126634
keyword=Dummy target run
- moved to Dummy target
- Ryan starts stepping closed the JT valve on the He target
to park the target
- 19:00 start Run 2367 - Asymmetry on dummy Al target;
only 31 µA possible from source.
Detector widths: Right arm: 6583 ppm
Left arm: 7144 ppm
detectors at only about 2000 counts above pedestal, Bryan
raises detector voltages during this run. After adjusting
we start a new run (Run 2368).
new widths Right arm: 6000 ppm
Left arm: 7300 ppm
so, this run will give us (if we get an hour of beam) about a
30 ppm error bar (per detector) or 21 ppm total error on the
asymmetry from our Al background - i.e. would let
us rule out "wacky" large asymmetries from quasielastic tail
from Al.
He target is "parked" with CHL flow at 7 g/s, 35 W on the
heater.