Shift Summary for EVENING shift, 25 July 99

Arun Tripathi (
Sun, 25 Jul 1999 22:02:02 -0700 (PDT)

Shift Summary for EVENING shift, 25 July 99

On Shift: A. Soddu, A. Tripathi

Hours of beam delivered at all intensities: ~7.5
Hours of beam delivered at nominal intensity: ~7 (@3-3.5E12)
Hours of E832 data (special runs not included): 5 hr 46 min
Hours of special runs (laser scans, muon runs...): 0.0

Accounting of lost time:
KTEV2 crash, stopping a hung run, changing tapes, drt_fresh_starts.

Runs ended this shift:

14021 --- BEAM_832 (BOA >2.4)

Tapes brought to FCC this shift: None

Accesses during shift: None

Overview of shift:
Inherited a bad-beam (BOA >2.4) run, KTEV2 died and was rebooted.
Good (although low int., SEM ~3E12, inches up to 3.5E12 around spill 115,
run 14023) beam since KTEV2 was resurrected. Pretty smooth and quiet
running since then.

Description of Shift:

15:30 Inherited a run with bad beam quality. BOA ~2.4. Day people told
MCR to fix it, and they are working on it.

16:09 Paged Rick Coleman about the BOA. He promises to talk to the
beam people about it.

16:39 Rick C. called back. He spoke with MCR, and they are still tuning
the beam, will call experts.

17:09 DDD Veto 2 enabled because KTEV2 crashed (took us a while to figure
out that's the reason).

We find out that the pipe.tcl program doesn't work, it just pops
up a blank window.

Tried stopping run 14021, but it hanged. After saving the online
histos, killed the run (drt_fresh_start -y). The tapes were
70% full, and upon Rick's suggestion, they were taken out and
fresh tapes loaded into the drives.

MCR calls and tells us beam quality has improved. BOA is now
18:01 KTEV2 rebooted with Ed's help (on the phone).

18:23 Beam 832 run 14023 started.

19:47 SEM has been low for this run, around 3E12. Called MCR. They are
aware of it and working on it.

19:54 Restarted processes "check_scalers" and "mon_memory" on ktev3
in order to convert the red "SADQ" button back to green.

20:54 Getting aborts. No beam for 10 minutes.
Even during the begining of the run, there were several aborts
and SY conservation periods.

~21:00 SEM is up to 3.5E12. MCR is still "tuning for higher intensity".

23:58 Loaded onsplit tape QKNL14 in drive tps3d2 on ktev4.

Follow up Notes on Previous Shift

Items to Follow up on Next Shift

No muon run or change of magnet polarity tonight. Continue to take
BEAM_832 data under the same conditions.