June 18, 1998
Attendees: P. Allen, S. Barrett, J. Bilello,
B. Clemens, J. Johnson, D. McKay, D. Segel, R. Stevens, B. de Vos, J. Wong
Absent: D. Shuh, H. Thompson
Directorís Presentation (K. Hodgson)
Keith Hodgson announced that he has accepted the
position of Director of SSRL effective July 1, 1998. Hodgson gave a detailed
update on SSRL operations and development in FY98. Highlights of directorís
BUDGET REPORT: (J. Streit) Streit reviewed the
status of the FY98 budget, as well as the Ď99-í00 budget projections.
SPEAR has an average uptime of 96% which is quite a
significant accomplishment given all the simultaneous efforts with the
SPEAR3 and LCLS projects.
James Safranek has accepted a position at SSRL and will
be working with the accelerator group on the SPEAR3 project.
MAR 345 failure led to a loss of two weeks on beamtime
on beamline 9-1 due to the unavailability of a back-up detector. Two back-up
machines are on order to prevent reoccurrence of this problem
First light in beamline 11-1 is anticipated in the fall
Peter Stefan, formerly of the Photon Factory and NSLS,
will be joining the staff and working on beamline 11-2.
A new protein crystallography faculty position has been
authorized. B. Weis is chairing a search committee and hopes to fill the
position by year-end. The position will focus on new directions, applications
and pushing state-of-the-art.
The House and Senate Appropriation Committees have modified
budgets close the Presidentís FY99 budget. If the Presidentís budget is
passed we will be able to aggressively continue beamline upgrades and SPEAR3.
While DOE strongly supports the SPEAR3 project it is important to track
the budget through committee negotiations. It may be necessary for the
SSRL user community to voice their support of BES to congress.
The LCLS design study has been published. Proceeding
with R&D including gun development. FY99 funding is still uncertain.
In response to a question about the future emphasis
on material science at SSRL, Hodgson reassured the committee that materials
research would remain strong as evidenced by the arrival of new staff member
There is a synchrotron radiation member leaving the
SLAC science policy committee. Hodgson solicited nominees for this important
position. Members serve a two-year term.
SPEAR3: (B. Hettel) Hettel reviewed the status
of the SPEAR3 upgrade project. The team is working hard to prepare for
the critical design review that will be held at SSRL July 28-30. Hettel
presented detailed comparisons of the SPEAR2 and SPEAR3 magnet girders,
machine parameters and beam properties. The ability to tap into the unique
expertise available at SLAC will be a critical component toward the success
of the SPEAR3 upgrade project.
BEAMLINE UPGRADES: (T. Rabedeau)
Overview: The SSRL beam line modernization program proposes
to upgrade the beam lines, controls, and instrumentation as required for
3.0GeV/200mA SPEAR operations and to deliver beams that take maximal advantage
of SPEAR3 through improved reliability, enhanced functionality, and increased
SPEAR3 Accelerator Project: The SPEAR3 project includes
funds to upgrade beam line front ends as required to handle the increased
power density of SPEAR3 and the relocation of the bend magnet source points.
New front ends will be installed on beam lines 1, 2, 3, 4, 5, 7, and 8.
Base Line Optics Upgrade: As part of an ongoing program
that started in 1995, significant fractions of SSRL's yearly capital equipment
funds until 2003 will be used to fund major improvements to many of the
beam lines. These upgrades include new cooled mirrors for wiggler end stations,
new monochromators for all insertion device beam lines featuring double
crystal monochromators, a replacement for the beam line 5 Locust monochromator,
and improved cooling on a number of other optical components (eg., jumbo
monochromator, most monochromator entrance slits, etc.). Additionally,
all masks, filters, and windows not rated for 200mA operations will be
replaced. Where feasible, the photon position monitors will be upgraded
for increased stability and noise reduction. Machine and personnel protection
electronics suites will be systematically replaced. Finally, beam line
control electronics, computers, and control software will continue to be
Beam Line Instrumentation Upgrades: SSRL will seek funding
through the competitive proposal process for a series of detector and specialized
instrumentation acquisitions. Included on this list are CCD's for large
unit cell crystallography, topography, and materials small angle scattering,
two ~30 element fast Ge detectors and one Si drift diode array detector
for spectroscopy, micro-focus optics for a micro-probe facility, a high
magnetic field x-ray scattering facility, and other specialized apparatus.
Future Enhancements: SSRL will seek funding through
the competitive proposal process for replacement of the beam line 4 and
7 electromagnet wigglers with insertion devices that provide twice as many
poles yet produce an adequate radiation fan width to serve the existing
experimental stations. SSRL will also continue the beam line mask and optics
upgrade program to permit further increases in the SPEAR3 stored current
above the initial goal of 200mA.
New Beam Lines: With the completion of SPEAR3, there
will be five easily accessible, unused straight sections for insertion
device beam line development. Additional insertion device straights and
bend magnet sources are available with somewhat greater engineering effort.
In addition to the beam lines current under construction, several ideas
for new beam lines were presented. These include a 1-4keV undulator beam
line for spectroscopy, a vertically polarized wiggler beam line for material
science, and a wiggler beam line for production protein crystallography.
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