SSRL USERS’ ORGANIZATION EXECUTIVE COMMITTEE
February 6, 2003
Attendees: Uwe Bergmann, Corwin Booth, Richard Brennan, Lisa Dunn,
Andy Fisher, Britt Hedman, Keith Hodgson, Cathy Knotts, Anneli Munkholm,
Erik Nelson, Piero Pianetta, Nick Pingitore, Tom Rabedeau, Deanne Jackson Rudd
Uwe Bergmann, SSRLUO-EC Chair, called the meeting to order at 9:30 am.
In October, Uwe met with Dr. Raymond Orbach who asked the users'
organization to provide feedback related to SPEAR3 and to provide suggestions
given budget constraints. Ben Bostick will be asked to follow up on this and to
prepare a letter to Dr. Orbach. Uwe also reported that Dr. Orbach encouraged
more interaction between the SLAC users' organization (SLUO) and the SSRL
users' organization. To work towards that, the SLUO chair or a representative
will be to sit in on the open sessions of future SSRLUO-EC meetings and
Tom Rabedeau presented beam line development slides which summarized
the plans and priorities shared with SSRL users at previous meetings. The
priority remains to have all the front ends 500mA capable when SPEAR3 turns on,
which is a necessary pre-step for SPEAR3. Insertion device beam lines are the
next priority. Four engineers are working on the bending magnet beam lines and
have been asked to develop ways that these beam lines may be able to accept
higher than 100mA current by making adjustments to critical components (e.g.,
key masks may be replaced, graphite filters installed upstream, etc.). These
beam lines may be usable, but with degraded capabilities compared to their
ultimate performance and optimized operation under SPEAR3.
Tom reported that the new 20-pole insertion devices for BL4 and BL7
have arrived. A decision has been made not to pull the BL4 and BL7 hardware
until all hardware has been received and is ready to be installed which means
that the center-line end stations (BL4-2 and BL7-2) could be opened and used at
reduced current in the interim. Even with degraded capabilities, users should
still experience an order of magnitude in better brightness. The BL7
installation work would likely be scheduled in the summer shutdown and would
include replacing the tunnel, beam transport, hutch, optics and utilities
With BL4-2 in operation, small angle scattering (SAS) users could be
accommodated there until the work on BL4 is ready to begin (estimated in 2006)
or until the current is higher than BL4-2 could accept, after which SAS users
could be accommodated on BL6-2. Britt Hedman reported that there was a plan
being developed to notify SAS users of this new development. Also, arrangements
have been made with the Photon Factory in Japan to accommodate some SSRL SAS
users during our shutdown.
Masks are in fabrication. Commercial alternatives to using the SLAC
brazing shop are being investigated.
Ramp up plans from 100mA to 500mA will be developed. Commissioning time
without users at beam lines may be used to demonstrate capacity and allow for
training with the higher current, lower emittance equipment. Although it is too
early to predict the exact user operations schedule for 2004 and beyond, SSRL
is planning to have shorter shutdowns than in the past, but may need to
schedule more frequent short maintenance/accelerator physics days for SPEAR3
related work. It was pointed out that extending the run longer into the summer
would be dependent on critical utilities such as electricity, water and on the
availability of essential SLAC services. Time may also be allocated in the
future for construction of alcoves, additional shielding as the current is
ramped up, and additional beam lines such as the east pit.
Tom reported that first light in the new BL11-3 was achieved recently,
but it was much weaker than expected. They will utilize scheduled
maintenance/accelerator physics days to work on this, including removing a
bellows between the monochromator and mirror for insertion of an ion chamber to
check if this is the problem.
Recent lightning strikes caused some power outages. Piero Pianetta
reported that back up generators are being investigated for critical equipment.
LN monos are particularly sensitive to long power outages.
Some DOE funding is being provided for the first phase of an LN
distribution system for the new LN monochromators. If additional funding can be
identified, we may be able to purchase a large tank to feed the system and be
able to provide backup to current system.
The LN monos on insertion device beam lines are limited to 2 cuts of
crystals, and there is significant overhead to replace crystals (requires
warming and venting mono, several days to replace, etc.). There is also a leak
risk as the monos have limited thermal cycles. Staff are trying to determine
the best cut for the majority of applications. Due to these limitations, it
might not be possible to accommodate a small number of users who may request
crystal cuts different from the majority of users. Unusual requests may be
accommodated on bend magnet beam lines.
During the long shutdown, equipment will be removed and covered, and
the floor will be emptied to protect everything from dust and damage during
Keith Hodgson reported that a serious safety accident had occurred in
January and he urged everyone, particularly users, to exercise caution when
working at or visiting unfamiliar environments such as SSRL. Although all
details were not yet known, an employee was working alone on a ladder when he
fell and hit his head. He was in intensive care for some time, but now seems to
be on the road to recovery. The accident could have been life threatening and
is being taken very seriously. Keith reiterated the importance that SSRL and
SLAC place on working safely. He encouraged everyone to understand and learn
from this accident, to exercise particular caution when working on ladders or
elevated platforms, and to look out for each other whether at SSRL or at home.
Additional information and safety guidelines are available on the website:
It was reported that two new staff scientists were recently recruited
to SSRL, Michael Toney and Uwe Bergmann.
Keith reported that the President's '04 budget had been released, even
though the current '03 budget is not yet out, and that the government was still
operating under a continuing resolution. This is an area of potential concern,
particularly for the LCLS program which had $6 M allocated in the '03 budget
that cannot be used until the appropriations bill or a continuing resolution
for new starts is approved.
Users expressed their desire to contact DOE officials to support the
need for funding for the current budget cycle as well as the next '05 budget
which BES should be starting to formulate. Users also expressed the need to
articulate the need for future funding sufficient to capitalize on the
capabilities of SPEAR3 so that the utilization of this already-invested-in
equipment is not threatened.
With the announcement that Uwe had accepted a position at SSRL,
beginning in March 2003, a closed session discussion was held to determine how
to handle the position of EC Chair. There are no rules that prohibit the Chair
from working at SSRL; however, SSRL employees would not be able to participate
in lobbying activities that the users organization may undertake. The committee
decided to have Uwe continue as chair through the remainder of his term rather
than elect another chair for the rest of the year. Vice Chair, Ben Bostick and
other EC members plan to represent user interests to the DOE and Congress.
A user representative is sought to serve on a SLAC security committee
which will coordinate security communications and provide for the collaborative
implementation of security policies. Deanne Jackson Rudd volunteered to serve
on the committee as an SSRL user representative.
The next annual meeting of the SSRL Users' Organization will be held on
October 9-10, 2003. Ben Bostick and Tim McPhillips will co-chair this meeting.
A subsequent meeting will be held to begin planning for this meeting with the
goal of getting the first mailing out by late Spring/early Summer. User
suggestions included emphasis on the SPEAR3 upgrade including a significant
status report of upgrade activities, new scientific capabilities with SPEAR3,
and possibly tours of SSRL. The committee urged workshop organizers to
summarize their workshops and publish these on the website. The few workshop
summaries that are available are posted on the website:
The committee urged users to stay active in SSRL activities, even
during the upcoming shutdown. Each EC members was asked to think in advance
about potential nominees for the annual Lytle Award and to consider submitting
nominations for this award.
Regarding candidates to fill upcoming vacancies on the SSRLUO-EC, users
are encouraged to contact potential candidates to ensure they are interested in
running for a position on the EC. Forward the candidate(s) names to Cathy
Knotts who will distribute a call for nominations and put together a ballot
later this year. A list of current and past EC members by scientific discipline
was distributed for informational purposes.
The committee discussed holding another meeting in early/mid May to
follow up on these issues and to get updates on budget on SPEAR3 related
- The meeting adjourned at 12:15 pm.
SSRL Liaison to SSRL Users' Organization Executive Committee