phenix status, 2/22/11 vtx commissioning on beam local polarimeter in service 9.6% in blue, -16.6%...
TRANSCRIPT
PHENIX Status, 2/22/11Takao Sakaguchi
Integrated events• Events in data files named “PHYSICS”
RPC Background investigationHit Rates Tunnel Scalers vs RPC Rates
- RHIC store 15172.
Yellow beam dumped, only blue beam left in ring- (blue runs from south to north through PHENIX IR)
Run 331180Yellow beam dumped
Injection
Yellow beam dumpedOrbit correction test
Orbit correction test
Run 331180
3/11
Run 331176
Hit Rates Tunnel Scalers vs RPC Rates480k clock trigger events.
run 331180
Blue beam only
RPC3S
RPC3N
4/11
We see large backgroundFrom Blue beam
Hit Rates Tunnel Scalers vs RPC Rates
clock trigger events.
Before yellow dump, both beams are on
run 331176 We see large backgroundFrom Both beam
Note, Vertical scale is different from the previous.
Hit Rates Tunnel Scalers vs RPC Rates - Same run as before, but extracted collision-related timing.
run 331176 RPC3S
RPC3N
6/11
Even for collision events,We see background in center region
-location of tunnel scalers south
RPC3South
South Muon arm structure
7/11
Special runs next couple days
backup
Hit Rates Tunnel Scalers vs RPC Rates - Cosmics. run 331346. 260k clock trigger events.
run 331346
Cosmicsno beam
RPC3S
RPC3N
10/11