CAT Chat Minutes

February 20, 1998

Issues that require action and/or follow-up

1. During the last Special Operating Mode, Sector 8 measured the width of the last harmonic energy. It was a little wider than usual. Could this have been related to the special filling of bunches?

To the first order there should be no change. But we would like to get more quantitative data so that we can analyze the lattice performance.

2. At 2:00 p.m. today, Sector 8 computer was subject to some sort of security check by ECT. What was this about, and why did we not receive a notification of this?

Because of the increased amount of electronic junk mail being received here at the lab, ECT has agreed to do a security check on all computer systems without charge. They are proceeding to do these checks on all machines. During the last three or four days, they checked all APS computers and are now checking the computers belonging to CATs that are linked through the ANL network. We will be advised of the results of these checks. It is recommended that you leave your machines on, but before we could inform all CATs about this, ECT had completed the check.

3. What can you tell us about the top-off mode?

There are many parts to top-off that should come together. The most important one is to bring user operations into this mode, which is not trivial. We will soon form a study group of users to help us benchmark the effects of this mode on various types of experiments. Do not worry at this point.

Information/Follow-up Items

APS Operational Status Update

The run will begin at 0800 hours on Monday, March 9, (not Tuesday, as it has been in the past) and will continue until 2400 hours on Sunday evening, April 12.

The first part of the run will be standard triplet operation.

A special operating mode is scheduled to begin at 0800 on April 7 and continue through the end of the run. The SOM will be singlets with 130-150 nsec spacing. Several options are being reviewed, and machine studies are planned to achieve normal stored current of 100 mA. We will keep you up-to-date on the progress of these studies.

The Argonne Credit Union is taking steps to stock the ATM to be compatible with the vending machines.

Other

Saturday 2-21-98 there will be a power shutdown that will affect LOM 432, which is Sector 4 through Sector 7. This will begin at 0600 and is scheduled to last about 12 hours.