CAT Chat Minutes

July 26, 2004

 

General Information
Machine Stats
 
Delivered beam:   1242.23 hours
   Percentage of scheduled time:  98.31%
   Downtime during period:   21.39 hours
   Mean time between faults (MTBF):   49.69 hours

Faults:

# 38   07/21 08:00   To   07/21 18:28    10.48  

  20ID BPLD Trip      [DIA]

  0.53 RTFB DSP Glitch, refill, resume top-up.

# 39   07/21 19:00   To   07/24 04:48    57.79  

  34ID Rad.mon . trip [UES]

  1.19 3ID gap, lost again, refill

# 40   07/24 05:59   To   07/25 20:01    38.03  

  7-BM EPS Trip        [SI]

  2.83 7BM Love Controller failed, refill, resume top-up.

# 41   07/25 22:51   To   07/26 08:05     9.22  

  Fill Ongoing             

  -0.00  

Beamtime Downtime Summary by APS Groups; 07/19/2004 to 07/26/2004:

DIN

Date

Beamline

Status

Duration

Group

Description

438

07/21/04

24-ID

Open

3 hr 31 min

AOD-IS

PS2 will not open. All stations have been searched , no faults, FEEPS and BLEPS are green. PSS is investigating.

439

07/21/04

19-ID

Open

4 hr 16 min

Serious Fault 69: PS2-MIXUP-S

439

07/21/04

19-ID

Open

4 hr 16 min

AOD-IS

Serious Fault 69: PS2-MIXUP-S

PUC Meeting K. Randall:   Kevin presented the following highlights on viewgraphs.

1296 Bunch Studies; Tuesday, July 20, 2004:

Time

Status

0600 - 0900

Machine Prep for 1296 bunch test - Sereno , Harkay , Sajaev , Decker et al.

0900 - 1700

1296 bunch mode test with shutters open. Floor coordinator support required.

Expected lifetime >100 hours

Bunch spacing 2.85 nanoseconds

Users:  Jin Wang , 1BM; Dave Paterson, 2ID; Barry Lai, 2ID; Johnathan Lang, 4ID; John Quintana, 5; Didier Wermelle, 6ID; Eric Dufresne, 7ID; Klaus Attenkoffer, 11ID; Julie Cross, 20; Steve Wasserman, 31ID.

Interested (not in attendance): Jeff Terry (10); Tom Irving (18); Brian Stephanson

Observations from Run:

  • Beam was stable

  - Beam loss was due to vacuum trip

  • Sector 2 and Sector 7 report increased count rate compared to 324 bunch
  • No negative feedback from users
  • Still waiting for response from everyone
  • Lifetime was excellent (although not as high as a previous study period)

  This is a big issue because optics alignment drifts as current falls

  Expectation would be that current would drop to about 92 mA between 12 hour fills, compared to 80 mA in 324 bunch mode

Future:

  • More studies periods
  • Convert 1 (of the 3) 324 bunch periods to 1296

Safety B. Glagola:   Informed group of users recent inability to make shipment from building 46 because the shipping papers were not completed properly.   Hazardous material was found, amount was larger than small quantities allowed, and the package did not ship.   Please remember when filling out the shipping order, to declare all items that you intend to ship.  

Reminder to post all ESAFs before the experiment starts.   If you need assistance, contact the floor coordinator.

OPS Directorate R. Klaffky:   Roger reported the following suggestion from OPS directorate meeting that safety personnel organize a meeting to present laser safety within the next two to four weeks.