Run Coordinator Dayly Report (29-30 April)

Log entry time 18:57:26 on April 30, 2004

Entry number 83658

keyword=Run Coordinator Dayly Report (29-30 April)

Summary

We switched to 20 uA LH2 running on 29 April at 17:00 for testing sensivity of asymmetry to beam current.
This morning MCC tried to accelerate up to 140uA in Hall A. They could reach 135 uA but with a lot of trips
(avalability went down to 75%). After one hour they gave up and came back to 120 uA as before.
Running smoothly since then.

Significant News

Asymmetry results at 10 uA seem not to be what was expected. More analysis work and tests with beam
(hence the present running at 20 uA) are under way

Short term Plans

Run 20 uA on LH2 until Sunday morning (8 shifts in total needed as estimated by our Analysis Coordinator))
IHWP will be changed from IN==>OUT on Friday evening.
Moeller will be done during Saturday Day Shift (D. Gaskell will be on shift)
A IN/OUT check will be done at that time

Longer term Plans

Switch to 15 uA, Al frame, IHWP = OUT on Sunday morning (no Moeller or RIP scan deemed necessary to switch
from 20 to 15 uA)
We need about 48 hours of Al frame data, so that would extend until Tuesday day/swing
(change OUT==>IN on Monday morning).
We must take into account in the timing that there will be beam studies on Monday (2 hours), Tuesday (4hours) and
Wednesday (3hours) with controlled access to Hall C (lot of work to be done in Hall in preparation for SOS new
calorimeter test).
Target boiling studies (4h) could be scheduled on Tuesday afternoon after beam returns.
We could start threshold tests on Tuesday Swing/Wednesday Owl for 24-36h (until Thu morning)
Thursday all day will be devoted to SOS calorimeter tests (1 shift)

Concerns

The last 3 days (10-13 May) will be devoted to transverse spin.
Whatever additional tests for understanding the systematics will have to be scheduled on Fri-Sat-Sun.

User name arvieux