CAT Chat Minutes

March 13, 1998

Issues that require action and/or follow-up

1. Could an APS web page be added that includes the beam parameter information?

We plan to set up a web page where this information will be regularly updated.

2. Is there any way to get access to the XBPM signals at higher speeds to evaluate instrument performance?

The XBPM electronics, at present, has a response of 300 Hz. We are planning to give you up to about 100 Hz, but this is not in the immediate plan. We have only just started testing this out.

3. At what speed are they now available?

Presently it is available at about 1 Hz. If you require fast information for a specific period for diagnostics of beamline components, please contact M. Ramanathan.

4. We have had a number of users who have not been able to find such things as the stockroom, and the User Office. Could some directional signs be put up?

We will do this.

5. Is there any word on when we will received the report on the computer security checks run by ECT?

We have a massive report, which would be difficult to sort, since it contains information on all computers. It is easier to run the same scans for each computer separately during the next shutdown period. We plan to do this and will provide you with a report at that time.

Information/Follow-up Items

APS Operational Status Update

The run has not been very good during the past week. During the ASD machine studies last week, an aperture restriction occurred when rf fingers were destroyed due to beam-induced heating. The affected kicker magnet ceramic chamber had to be replaced, and this required a section of the storage ring to be brought to atmosphere. The resulting vacuum conditioning and beam to users was further delayed due to power grid fluctuations during Monday's snow storm. The continued poor vacuum resulted in poor life time during the first several shifts of the run. In the last couple of days, several rf and power supply trips have occurred. The reasons for these trips are being investigated.

Monday we begin ASD studies at 0800. Tuesday at 0800, we will be at 25 mA for shielding verification until about 1600. It is likely that we may be finished earlier.


Everyone who has an APS e-mail address will soon be able to access the stockroom catalog.

The aisles around the area on the Experiment Hall floor where MM1 (near Sector 35) is being rebuilt may at times be designated as construction areas, which require the use of hard hats and safety glasses. The signs will be changed on an as-need basis. We will try to have hard hats and glasses as loaners for use in this area. We may also mark an area as a detour. We will try to keep you apprised of this situation via CAT net. For the next week or so, it may be wise to walk the other way around the floor.

A couple of weeks ago, some of the users requested better notification of work being done on PSS and EPS. The current work request system does give you a date, although it may not always be reliable. We are continuing to work on a new notification system.


We are very concerned about your safety. We have constantly alerted you about your safety and reminded you to adhere to the safety instructions. We wanted to let you know that we did have to shut down an experiment recently. The problem is being handled. We want to remind you that if you have your procedures in place, make certain that your users are aware of these procedures and that they comply with them. We do not like to shutdown experiments, but we will when the need arises.


The Spectrum Club is holding a Pizza Party Lunch on Wednesday 3-18-98 at noon. The price in $3.00 for members and $5.00 for non-members. Tickets are available in the User Office.