CAT Chat Minutes

March 1, 2004

General Information
Machine Stats R. Klaffky:   Listing of Statistics for Run 1-2004 (created Monday, March 1, 10:06:11 CST 2004)

  Delivered beam: 633.07 hrs.
   Percentage of scheduled time: 96.79%
   Downtime during period: 20.99 hrs.
   Mean time between faults (MTBF): 57.55 hrs.

Faults:

# 22   02/25 08:00   To   02/29 21:31   109.51  

S20DBPLD trip       [DIA]

7.35 Investigation ongoing, top-up resumed

# 24   03/01 04:52   To   03/01 08:05     3.22  

RTFB problem        [DIA]

1.99 S23/25 Reflective memory problem, booster vacuum

Beamline Downtime: Summary period 2/20-26/2003

Number

Date

Time

Description

Downtime

Group

Resolution

000347

2/20/04

08:37

Water leak into monochromator

4:56

Beamline

Repair of beamline water line

000352

2/21/04

07:53

BLEPS trip.   User was not present to report the trip until 10:51.

3:00

Beamline

User notified beamline personnel, and the fault

000348

2/21/04

18:07

Vacuum leak in downstream shutter

39:26

Beamline

Repair by beamline personnel; replacement of limit switches and revalidation by PSS

Beamline Troubleshooting G. Goeppner :   George summarized events related to the booster vacuum problem.   A pressure rise to 10-4 torr in approximately 15 meters of the booster, closed vacuum valves and suspended APS operations.  The affected area was divided into two sections of ~8 meters each for leak checking.  The upstream section was determined to be leak tight at the time of the meeting.   There were five diagnostic assemblies in the affected sections; two were determined to be leak tight at the time of the meeting.  Estimated completion of the work was given as 6-7 hours before turning over to operations staff to set up for operations at 8 am ions , best case scenario.  (The problem was eventually determined to be a water cooling tube in a horizontal scraper.  The scraper assembly was removed and the booster turned over to operations staff at around 9:00 p.m. to condition the booster with beam and to prepare orbit for operation with 324 bunches.)

Users commented that the lines of communication throughout the RTFB problems , were lacking.   Can there be a line or two of additional information appearing on the monitors apprising experimenters of beam status? Can information be provided at a quicker rate?   Roger said he would look into this and agreed with Users that information should be shared with user groups and as quickly as possible. Roger will send cat-net email that will update beam status current information concerning operations tomorrow.

Safety E. Chang:   A three-person team consisting of Bruce Murdoch, Eric Turnquist, and John Houck will be reviewing APS lasers during March 15-19, 2004.   There was concern expressed regarding speeding traffic, please remember to limit speed to not exceed a fast walking pace.   The safety inspections will take place in buildings 434-435 during March, 2004.