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User name Serge
Log entry time 16:38:00 on February 14, 2004
Entry number 76531
Followups:
keyword=(happy again) RC Summary Friday/Saturday 02/14
Run Plan Friday 02-06-2004Run Plan - Wednesday 01-28-2004
RC Summary Friday/Saturday
02-14-2004
Another good day
with
progress... Have a look !
- Change to LH2 was made on
Wednesday
morning
- IHWP is OUT
since Friday afternoon
- Data taking on LH2 target with 40 uA
- 8.3 hours of LH2
target parity quality
data on tape
(runs
19869-19891)
Achievements during this period:
1) Beam at 40 uA.
2) We are running with 6 mm halo target and
the
rates are in fact
improving with time and some
adjustement (see Halo-improve)
3) IHWP is now OUT
- Moeller measurement done before and after IHWP
change
(Thanks Tanja for her patience and
see Moeller)
- Rip scan performed (see RIP1)
- Need a second round after changes at the injector
(see RIP2)
4) Feedback operation and beam parity quality
- Bug fixed in convergence script (see Convergence-Bug)
- Data seems pretty good (see ParityQuality)
5) 120 Hz are being replayed by the worker (No60Hz)
with the instructions
given in (120Hz).
- The good bahaviour of the experiment lead me,
follwoing damon suggestion,
to ask a 120 Hz only every 8 hours. Might
be changed later again.
6) Hall B leakage current measured ... in 2 steps (see Leakage)
7) Good data taking (although only 8.3 hours of perfect data out of
12.2 h data on tape !!)
8) New PID cuts implemented (see PID)
9) Coil pulsing data analysis
- Correction is working fine (Correction)
- NOTE that if
you experience a beam trip during the data taking,
the data are useless. In order to save time, the best is to
keep
the run going and just restart Gary's
script (see Trip-coil)
10) Most of the cup and plates as well as silverwares have been
cleaned (see Hygiene).
On
a more general basis. Mid-Term plan
1) We will likely change the IHWP
state the next Sunday (2/15)
Make a RIP scan just after, and a
Moeller measurement before and after
This is a change compared to my
previous run plans and summary report.
This comes from the fact that Kaz is confident this should not change
the slopes and also that Damon is on shift and can perform the Moeller
measurements
2) BPM/BCM calibration need to be done every week. Tentative next Wednesday.
3) Fastbus measurement to perform a check of the gain and
set a reference spectra. Tentative : Tuesday 2/17
after beam development
4) Lumi scan on LH2 (aksed by Silviu and Jianglai). After BCM
calibration.
Concerns
A) NA
Electronics threshold at 40 uA with LH2
- NA data taken at various
thresholds (1
to 7 digits)
- Results seems to confirm a problem with
thresholds with 40 uA beam and Lh2
target
- Possible action is to
lower the thresholds drastically.
- Need more thoughts
but decision to be made rapidly.
- Low rate in FPD 5-10-BL (see 5-10-BL)
B) FPD 2-14-FL
- Need to look at Fastbus data and TED ToF to confirm changes
C) Coil modulation
- Is it compatible with a 6 mm hole target ?? (see Trip?)
- Little bug to be fixed (resting point is not in the center
of the grid (see Coil)
D) Some confusion about what
fastfeedback are supposed to be ON or OFF
- Energy (comment of Klaus, I kept in the Run plan) ON
- Position (comment on How To for coil modulation) OFF
List
of shift summaries
Friday Swing F-Swing
and cdaq-FO
Saturday Owl
Sa-Owl
and cdaq-SaO
Saturday Day Sa-Day
and
cdaq-SaD
Serge Kox
Pager : 584-5681
Cellular : 876-1791
e-mail : kox@in2p3.fr