ALSNews is a biweekly electronic newsletter to keep users and other interested parties informed about developments at the Advanced Light Source, a national user facility located at Lawrence Berkeley National Laboratory, University of California. To be placed on the mailing list, send your name and complete internet address to ALSNews@lbl.gov. We welcome suggestions for topics and content.
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ALSNews Vol. 62 October 2, 1996
Table of Contents
1. OPERATIONS UPDATE 2. USERS' MEETING REGISTRATION FEES REDUCED, DEADLINE EXTENDED 3. USERS' MEETING AGENDA AND UPDATES
1. OPERATIONS UPDATE
(contact: rmmiller@lbl.gov)
Beam availability for the last two weeks was 87.8% overall and 89.1% for user shifts. Causes of lost beamtime included problems with the transverse feedback system (repairs made, further tests planned during accelerator physics time), software problems in switching from injection corrector magnet settings to production settings (fixed), and a vacuum leak at Beamline 9.0.1's personnel safety shutter 1 (repaired). See below for a report on repairs to sector 8's undulator.
Operations Summary for October 2 - October 21Weekly operations scheduling meetings: Fridays at 3:30 p.m. in the Building 6 conference room. The Accelerator Status Hotline at (510) 486-6766 (ext. 6766 from Lab phones) features a recorded message giving up-to-date information on the operational status of the accelerator.Oct 02, 00:00-08:00 User scrubbing & special operations (1.9-GeV/260-mA/320-bunch user operations) Oct 02, 08:00- Oct 07, 07:15 1.5-GeV/400-mA/320-bunch user operations Oct 07, 07:30-24:00 Maintenance & startup Oct 08, 00:00-24:00 Accelerator physics Oct 09, 00:00-08:00 User scrubbing & special operations Oct 09, 08:00- Oct 14, 07:15 1.5-GeV/400-mA/320-bunch user operations Oct 14, 07:30-24:00 Maintenance & startup Oct 15, 00:00-24:00 Accelerator physics Oct 16, 00:00-08:00 User scrubbing & special operations Oct 16, 08:00- Oct 21, 07:15 1.9-GeV/260-mA/320-bunch user operations
** SECTOR 8 UNDULATOR DRIVE SYSTEM ROLLING AGAIN **
The sector 8 undulator's drive mechanism is rolling smoothly again, thanks to
the efforts of the ALS Insertion Device Group. The anticipated two-day
shutdown for removing a jammed roller screw and adjusting the undulator to
operate safely without it was avoided entirely when technicians successfully
freed the jammed screw with oil. Some moving parts within the roller screw
had become pitted, and the grease had dried, making it possible for surfaces
that normally roll smoothly to lock together. Technicians removed the screw
assembly from the undulator, disassembled it, polished and lubricated it,
added a grease fitting (to speed any future lubrication), and replaced it in
the undulator. The seven other roller screws in the drive mechanism were also
inspected and lubricated; no other problems were found. The entire operation
was carried out during regularly scheduled maintenance time without
disturbing the undulator's alignment. User operations resumed on Wednesday,
September 25, a full day ahead of the original schedule, as the Accelerator
Physics Group ceded its unexpectedly recovered day to users.
Though undulator roller screws are designed to last the life of the undulator, we have already begun taking precautionary steps to avoid similar problems in the future. The sector 7 undulator's roller screws were inspected two weeks ago, and no problems were identified. During the September 30 maintenance period, all other moving parts in the sector 7 undulator's drive mechanism received preventive lubrication. To keep all our undulators rolling along, we will add a maintenance cycle for insertion devices to our regular accelerator maintenance tasks.
2. USERS' MEETING REGISTRATION FEES REDUCED, DEADLINE EXTENDED
(contact: alsuser@lbl.gov)
If you're considering attending the ALS Users' Association Annual Meeting on October 21-22, we have good news! First, Jeff Bokor (Users' Executive Committee chair) and ALS management have reviewed the meeting budget and announced a reduction in registration fees as follows: $120 regular fee, $70 student fee. Both fees include the banquet to be held Monday evening, October 21. If you have already sent in your registration by check, you will be reimbursed on site. If you paid by credit card, only the appropriate amount will be charged. Please let us know if you are a student when you register.
Second, the deadline for advance registration has been extended to October 11. You may also register at the meeting if you wish. To request a registration form, send an email message to alsuser@lbl.gov with your name, fax number, and complete mailing address, and put "Request User Meeting Registration" in the subject line.
3. USERS' MEETING AGENDA AND UPDATES
(contact: alsuser@lbl.gov)
The Annual Meeting of the ALS Users' Association will take place October
21-22. Jeff Bokor, chair of the ALS Users' Executive Committee, is the
organizer for the meeting. Below you will find an agenda of the speakers for
the meeting and a list workshops to be held the following day. One news
brief: the new ALS T-shirts, with Annette Greiner's winning design, will be
free to all registrants this year.
** PRELIMINARY AGENDA FOR USERS' MEETING **
The 1996 users' meeting features a wealth of scientific results, talks on new research opportunities, and reports from ALS staff. Other items on the agenda include a talk from Pat Dehmer, the head of Basic Energy Sciences at the Department of Energy.
Monday, October 21, 1996** WORKSHOPS TO BE HELD OCTOBER 23 **08:30-08:45 Welcome (C.V. Shank, Director, LBNL) 08:45-09:15 DOE Energy Research (P. Dehmer, DOE) 09:15-09:45 Washington Scene (M. Lubell, CCNY & APS) ------------- 10:15-10:45 ALS Director's Report (B. Kincaid, Director, ALS) 10:45-11:15 ALS Scientific Program (N. Smith, LBNL) 11:15-11:45 ALS Experimental Systems (H. Padmore, LBNL) 11:45-12:00 UEC Business Meeting (J. Bokor, LBNL) ------------- 12:00-14:00 Box Lunch, Vendor Exhibit, ALS Visit, Special Tours, Set Up Posters ------------- 14:00-14:30 Recent Exciting Results from ESRF (M. Altarelli, ESRF) 14:30-15:30 Short Previews of the Wednesday Afternoon Workshops by the Workshop Organizers ------------- 16:00-16:30 Progress on High-Resolution Photoionization, Photoelectron, and Photodissociation Research at the Chemical Dynamics Beamline (C. Ng, Iowa State Univ.) 16:30-17:00 Post-Collision Interactions in the Auger Decay of the Oxygen K-shell (W. Stolte, Univ. of Nebraska) 17:00-17:30 Photoexcitation and Autoionization of Hollow Lithium States Using the Third Generation ALS Synchrotron Radiation Source (F. Wuilleumier, Univ. Paris-Sud) ------------- 19:00 Banquet at University of California Faculty Club
Tuesday, October 22, 1996
08:30-08:45 Unique Research Opportunities with Circularly Polarized Soft X Rays (J. Stohr, IBM) 08:45-09:00 Theory and Computation for ALS Experiments (M. Van Hove, LBNL) 09:00-09:15 Time-Resolved X-Ray Diffraction from Laser-Heated Crystals (J. Larsson, Univ. of California-Berkeley) 09:15-09:30 Soft X-Ray Speckle (S. Kevan, Univ. of Oregon) ------------- 09:30-10:00 Detection by Soft X-Ray Microscopy of Structural Abnormalities in Malaria Parasites (C. Magowan, LBNL) 10:00-10:30 Results from Beamline 8.0 (L. Terminello, LLNL) ------------- 11:00-13:00 Box Lunch, Vendor Exhibit, ALS Visit, Poster Session ------------- 13:00-13:30 Extending Polarization-Resolved Optical Techniques into the Soft X-Ray (J. Kortright, LBNL) 13:30-14:00 Magnetic X-Ray Dichroism Studies with Angle-Resolved Photoelectron Spectroscopy (K. Goodman, LLNL) 14:30-15:00 Photoelectron Diffraction and Holography at the ALS: New Dimensions in Space, Time, and Spin (C. Fadley, Univ. of California-Davis) 15:00-15:30 Photoelectron Holography and Quantitative Structure Determination of a Magnetic Surface Alloy (S. Ravy, CNRS-Saclay/Univ. of Wisconsin)
On the day after the Users' Meeting, there will be one workshop in the morning and five parallel workshops in the afternoon. The registration deadline for these workshops is past, but remaining spaces will be available on a first-come, first-served basis. You may register for the workshops using the blue form from your registration packet; if you don't have the form, send an email message to alsuser@lbl.gov with "October 23 Workshops" in the subject line. The body of the message should include your workshop choices, name, complete mailing address, email address, and phone and fax numbers. Put "October 23 workshops" in the subject line. The workshops' times, titles, and organizers are given below.
09:00-12:00 Introduction to Accelerator Physics for Users
(Alan Jackson, Howard Padmore)
13:30-17:00 Choose one of five workshops:
Soft X-Ray Fluorescence (Tom Callcott)
Atomic and Molecular Physics (Nora Berrah)
Spectromicroscopy (Harald Ade)
High-Aspect-Ratio Microfabrication Using LIGA
(Keith Jackson)
Dispersive NEXAFS (Zahid Hussain)
ALSNews is a biweekly electronic newsletter to keep users informed about developments at the Advanced Light Source, a national user facility located at Ernest Orlando Lawrence Berkeley National Laboratory, University of California. To be placed on the mailing list, send your internet address to ALSNews@lbl.gov. We welcome suggestions for topics and content. Writers: deborah_dixon@macmail.lbl.gov, annette_greiner@lbl.gov, jccross@lbl.gov
Last updated December 20, 1998
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