APS User News-at-a-Glance

Issue 18: December 20, 2002




1. Message from Murray

(Contact: jmgibson@aps.anl.gov)

On behalf of APS employees, I wish you a happy holiday and a good new year. This year there have been many changes at APS aimed at creating an improved environment for conducting your research. I have been very pleased by the constructive dialog between users and APS as we adapt together to meet future challenges. We are in this together--our success is only possible through your success. Congratulations on your great achievements so far. Please do not hesitate to let me know of any ideas you may have that would help us to move forward most effectively.

2. Workshop: Beyond Undulator A--New Directions and New Needs for Insertion Devices

Antanas V. Rauchas, Director of the APS Operations Division, an Argonne employee since 1967, and an early and integral member of the team that designed and built the Advanced Photon Source (APS), died on November 3, 2002. He was 56. Antanas, universally known as Tony, had a special knack for integrating technical ingenuity and managerial imagination, which resulted in many accomplishments that will continue to shape science at the APS for years to come. Tony's warmth and enthusiasm will be greatly missed at the APS. The full obituary for Tony is posted at http://www.aps.anl.gov/aps/news/20021107a.html. A search is underway for a new APS Operations Division Director to succeed Tony.

3. General User Program Completes Debut Cycle

(Contact: jandrew@aps.anl.gov)

After three intense months of transition to a new process, the APS has selected its first cohort of "general users." Thanks to the extraordinary effort and patience of all involved, this program is off to a very promising start. Users submitted 322 proposals through the new web interface, and 188 were allocated beam time. In terms of shifts requested and available, the general user time was oversubscribed by a factor of about 1.5. The average score for accepted proposals was 2.2 on a scale of 1 to 5 (with 1 being highest). In keeping with common practice at other facilities, the scores of unsuccessful proposals will be incremented slightly in the next cycle to improve their chance of receiving time. More details on this policy and on score distributions for Run 2003-1 are available on the APS Web site under Beam Time (see Proposal Process heading) or directly at http://www.aps.anl.gov/user/beamtime/prop_submission.html. (The deadline for submitting proposals for Run 2003-2 is February 21.)

4. Presentations from Insertion Device Workshop Now Available

(Contact: sasaki@aps.anl.gov or moog@aps.anl.gov)

Is Undulator A still the right choice for new beamlines and experiments? What are the power limitations? What types of devices are used at other synchrotron radiation facilities? What new possibilities exist at the APS? These and many related questions were the focus of a workshop on insertion devices held at the APS on December 5. Even if you missed the workshop, you don't have to miss out on the news: presentations from the workshop are now available through the APS Web site, under Meetings, or directly at http://www.aps.anl.gov/conferences/novel_ids/agenda.html. Check out this page to see a range of viewpoints on these and other issues about the future of insertion devices at the APS.

5. Holiday Shutdown Affects Many Argonne Services

Argonne National Laboratory and the Advanced Photon Source are officially closed from December 21 through January 1. The shutdown affects the availability of many services, because only the staff needed to properly maintain the Laboratory's facilities will be scheduled to work.
ACCESS -- The APS User Office and the Visitor Information Center will be closed through the holiday break. Non-U.S. citizens who have not been pre-registered before December 20 will not be allowed access.
DELIVERIES -- No deliveries can be accepted at the laboratory during the holiday break. Commercial package delivery companies will hold shipments until Thursday, January 2.
LODGING -- The Argonne Guest House will close at 12:00 p.m. on Sunday, December 22 and reopen Thursday, January 2 at 6 a.m. Visitors needing alternative onsite lodging during the break must make arrangements and check in no later than December 21; call 630-729-6000 for information.
DINING -- The Argonne Guest House and cafeteria will close after lunch on Friday, December 20 and reopen for lunch on Thursday, January 2. But if you're on site, don't worry; you won't starve! The 401 Grill will be open the usual weekend hours (11:30 a.m. to 7:00 p.m.) during much of the shutdown, closing only on December 24, 25, and 31 and January 1. On January 2, the Grill will resume regular evening hours (4:30 p.m. to 9:00 p.m.).

6. Operations Update: APS Achieves 99% Availability

(Contact: klaffky@aps.anl.gov)

During the current run, which began October 9, the APS has far exceeded every one of its previous operational records. As of December 16, the APS has achieved an exceptionally long running period without a beam-dumping fault--325 hours. The beam availability for this run is over 99%, with a mean time between faults (MTBF) of over 71 hours. The previous records for beam availability and MTBF were 97% and 42 hours, respectively.


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