Shift Summary for owl shift, 07/01/99

Sandrine Laplace (
Thu, 1 Jul 1999 07:01:23 -0500

Shift Summary for owl shift, 07/01/99

On Shift: Sandrine, Leo

Hours of beam delivered at all intensities: 6
Hours of beam delivered at nominal intensity: 6
Hours of E832 data (special runs not included): 6
Hours of special runs (laser scans, muon runs...): 0

Accounting of lost time:

- around 30 min. lost because the beam stop was disabled
- Tevatron seemed to have some problems (magnet f17lam tripps off, rad.
trip. booster...), beam went off and back many many times after 3am.

Runs ended this shift:
Run 13777 - 12.8 - BEAM_832 still continuing.

Tapes brought to FCC this shift: none

Accesses during shift: none

Overview of shift:

good e832 data taken for almost the entire shift.
No major problems.

Description of Shift:

run spill time comment

13777 0:00 Inherit shift. Muon run just ended; 4 channels
at the low end of warning range. 832 run starts.

13777 ? 0:05 Sandrine has dinner. Leo's stomach starts to
Pasta. His favorite foodstuff.

13777 34 1:02 KTEVANA errors concerning top of stream 5 ->

13777 73 1:47 Channel 689 has a laser stability RMS=3.5%
1231 " 4.6%
but this is still below the panic level.

13777 102 2:26 Little out of limit of intrinsic DC efficiency,
but only at 1 sigma level.

13777 3:00 Second little out-of-limit (when a shift is so
you desesperate to find such a "little out of
in the ADC of a channel of V1 plane.

13777 127 3:10 Scaler for CA is out range ...It turns out
that the beam stop is disabled for a short time.
MCR notified.

13777 151 3:40 Beam stop enabled, everything back to normal.
Spills 127 to 151 are bad spills.

3:50 Leo has dinner. It smells good, has bones, even
probably had wings some days ago...

13777 3:57 Explanation of the previous trip: magnet f17lam of
the Tevatron had tripped off. They seem to have
some recurrent problems up there. Beam goes off
and back every 5 mins.

4:15 Gas check list completed.

13777 4:30 MU2 ADC mean profile: channel 28 is upper the
The HV should be lowered in the next access.

13777 202 4:44 KTEVANA error concerning stream 5. KFREND fixed it.

13777 5:40 Same problem, same solution.

13777 295 6:45 Saw red light on SDAQ pannel for failed +6V on
Station 5, rack 1, lower CAMAC crate. This rack
has DC3, SCIA; both histos look OK and the error
soon disappears.

Follow up Notes on Previous Shift

LASER SCAN not done, since we've never down.

Items to Follow up on Next Shift

LASER SCAN still needs to be done.