European Spallation Source: ISIS
ESS News, 15th December, 2000
Letter by the ESS Executive to the Editor of Physics World
12th December, 2000
Your news story last month (December p12) reported the latest progress on the
European Spallation Source (ESS) as it moves from the drawing board to reality.
However, the story contained some inaccuracies and we believe that readers will
welcome the latest facts.
First of all, the decision about where to site the ESS is a difficult and completely
open issue, but one that has not yet been made. At least four or five countries
will probably put forward realistic proposals to host the project.
Last November the council of the ESS took some important decisions. As your
story mentioned, the council aims for a funding decision in 2003, which would
allow the ESS to be operational in 2010 - either as a stand-alone facility or
as part of a multi-purpose one. The council will also decide this summer whether
to add a long-pulse target station to the short-pulse one.
Meanwhile, members of a science working group are collaborating with instrumentation
experts to determine the best suite of instruments for the ESS to address future
scientific questions. Their conclusions, which will be the focus of a forthcoming
workshop that the ESS and the European Neutron Scattering Association (ENSA)
are organising for May 2001, will also guide the final decision on the performance
specification for the ESS.
The Jessica experiment mentioned in the article - in which a 1.3 GeV beam was
delivered to a mock-up target - is important, but it is not the only one. For
example, a feasibility study is currently underway for a high-intensity proton
accelerator for condensed-matter research, which could also be used for physics
and engineering research into transmutation and other applications. Apart from
technical considerations, what will determine if this is a realistic option
will be the total cost and the way in which communities other than the well-organized
condensed-matter researchers could contribute to an affordable solution.
The laboratories forming the council of ESS, along with the national research
councils, national governments, the European Science Foundation and the Commission
of the European Community will now have to work on a mechanism that enables
Europe to decide whether to build the ESS and other large-scale facilities over
the next few years.
Peter Tindemans
Chairman, ESS council
Kurt Clausen
ESS project director
Dieter Richter
ESS science co-ordinator
Uschi Steigenberger
Secretary, ESS council
Physics World December 2000 v.13 no12 p12
Neutron source moves forward
The World's most powerful pulsed neutron facility, the European Spallation Source
(ESS), moved a step closer to reality recently when researchers delivered a
1.3 GeV beam to a mock-up target called Jessica. The beam had a repetition rate
of 0.1 Hz and an intensity of 8x108 protons per pulse; the time-of-flight spectrum
was measured from a provisional water moderator. The work, carried out at the
COSY proton accelerator in Jülich, Germany, is designed to produce the
optimum target design (Physics World May 1997 p5).
The timetable for completion of the ESS changed earlier this year and a construction
proposal is now due in 2003. But Kurt Clausen of Denmark's Risø National
Laboratory, which is responsible for the ESS source and instrument development,
says that the facility should still be ready for experiments in 2010. this is
no later than originally planned, but depends on the project receiving the necessary
backing at the next ESS Council meeting.
The ESS will be hosted by the Forschingszentrum Jülich in Germany. It will
operate at an energy of 1.3 GeV, have a peak thermal neutron flux of 2x1017
cm-2s-1 and is projected to cost Euro 1-2bn, depending on the final design.
It will be use for research in physics, chemistry, biology, materials science
and other fields.
Computational Accelerator Physics Grand Challenge: Accelerator
Testbeds for HPC Design Tools
Next-Generation Spallation Neutron Sources
Currently there are two types of neutron sources for neutron scattering research: fission reactor sources and pulsed accelerator-based spallation sources. Due to the difficulty of bringing new reactors online in many countries (consider, for example, the recent cancellation of the Advanced Neutron Source), the United States and the European Community are now designing the next generation of spallation sources to serve the needs of the neutron scattering community. In particular, the United States is designing a short pulse spallation source (SPSS) that will be built at Oak Ridge National Laboratory, and the European Community is designing the European Spallation Source (ESS). Pulsed spallation sources, like that at the Los Alamos Neutron Science Center (LANSCE), are extremely important tools for materials science and biological science research. They have led to developments in advanced composite materials, polymers, new-generation catalysts, magnetic materials, and biomolecular structure determination.
Next Linear Collider (NLC) for High Energy Physics
While the Large Hadron Collider (LHC), to be built at CERN, offers an entry
into the TeV center-of-mass energy regime to explore new particle physics phenomena,
a TeV scale electron-positron collider, the Next Linear Collider (NLC), will
provide a complementary program of experiments with unique opportunities for
both discovery and precision measurements. At present, there is great international
interest in the NLC as prototype facilities in the United States (SLAC), Japan
(KEK), and Europe (DESY and CERN) are coming close to completion. These test
accelerators will soon be able to answer questions of an optimal design choice
and the estimated cost of such a collider. There is consensus among high energy
physicists that both the LHC and the NLC will be required to understand the
nature of physics at the TeV scale, and to see how new phenomena fit together
with known particles and interactions into a grander picture.
Linac Coherent Light Source (LCLS)
A leading candidate in the development of 4th Generation Angstrom-wavelength
sources is the Linac-driven Coherent Light Source (LCLS). Based on analytical
and computer studies of this device, peak powers of more than 100 GW are expected
to become available over broadly tunable wavelength ranges, opening up a wide
range of important scientific and technological applications in research areas
ranging from the fundamental properties of materials to biological imaging.
At present, projects for developing LCLS facilities have been initiated at SLAC,
BNL, and DESY, with projected completion dates ranging from 1998 to 2001. More
recently, due to the high levels of interest stimulated by scientific workshops
held at SLAC, DESY, and the ESRF, other synchrotron radiation facilities (e.g.,
the APS at Argonne National Laboratory and KEK in Japan) have initiated exploratory
LCLS programs.
Story last updated at 11:23 a.m. on Tuesday, July 17, 2001
Magid shares goals of Joint Institute for Neutron Sciences
by Paul Parson
Oak Ridger staff
Lee Magid's face lit up with smiles as she talked about the Joint Institute
for Neutron Sciences.
"It's great to be involved in incubating something like this," Magid
said during an interview Monday afternoon. She was recently named acting director
for the proposed institute, which will give scientists access to Oak Ridge neutron
research facilities, particularly the Spallation Neutron Source and the High
Flux Isotope Reactor.
And Magid is no stranger to the proposed institute. Back in 1996, she was involved
in the initial talks for the project with officials from the University of Tennessee
and Oak Ridge National Laboratory.
Magid said ground is expected to be broken on the institute in 2003. It will
be located in the SNS laboratory/office complex and in a housing and conferencing
facility to be constructed near the SNS using $8 million in state funding.
The institute, according to Magid, will serve as an intellectual center for
the neutron sciences and work toward developing programs for researchers, students
and higher education faculty who will use Oak Ridge's neutron facilities.
Fellowship and sabbatical programs at the institute are expected to attract
neutron scientists from all over the world. The institute will also foster joint
faculty positions between ORNL and its university partners and assist multi-institutional
research teams in developing new applications involving neutron scattering and
other uses of neutron beams.
As part of its education and outreach mission, the institute will organize workshops
and summer schools for new and experienced researchers, student and faculty
programs for researchers-in-residence and educational partnerships with schools
and colleges. The institute will also partner with area colleges in developing
the workforce needed to operate the $1.4 billion SNS project, which is expected
to be completed in 2006.
The SNS will be used for scientific research and development of a variety of
industrial materials.
Neutron scattering research has been responsible for improvements in jets, computer
disks, shatterproof windshields, and stronger, lighter plastics. Neutrons have
also been used in medical research for such studies as determining how bones
mineralize during development and how they decay during osteoporosis.
Six Department of Energy laboratories -- Argonne, Brookhaven, Jefferson, Lawrence
Berkeley, Los Alamos and ORNL -- are collaborating on design and construction
of the SNS atop Chestnut Ridge. ORNL is managing the partnership and is integrating
each of the labs' design contributions into the facility.
Magid pointed out that the work at SNS and the surrounding facilities will also
serve as a "test bed" for future neutron research efforts, particularly
the European Spallation Source. A plan for the proposed $1.5 billion facility
is expected to be submitted for funding by 2003. However, the European Spallation
Source is already being touted as a more powerful research facility than the
SNS and a planned Japanese neutron research project.
As for the future of the Joint Institute for Neutron Sciences, Magid said the
goal is to name a permanent director within two years but also said she does
not plan to pursue the job.
In addition to her acting director duties, Magid also serves as the ORNL/SNS
liaison for UT's Office of Research and Information Technology and is a chemistry
professor at the university.
She received her bachelor's degree in chemistry from Rice University in 1969
and her doctorate in chemistry from UT in 1973. She previously served as vice
president for research and graduate studies at the University of Kentucky from
1991 to 1994, as associate dean for research and resources development within
UT's College of Liberal Arts from 1987 to 1990 and as a part-time employee of
ORNL's Chemistry Division from 1979 to 1984.
Developments
The "Richter - Springer Report" [Fejl! Henvisningskilde ikke fundet.]
provides an overview of the 26 major neutron sources available for neutron research
in the OECD countries and in Russia. Half of these neutron sources are in the
European region. Most of the sources incorporate nuclear reactors that were
built in the 1950s and 1960s. For technical reasons, the majority of these reactors
will reach the end of their useful lives between the years 2005 and 2015. The
study shows that less than one third of the present neutron sources will be
available in the year 2015. Concerning Europe, only four out of the thirteen
currently available neutron sources are likely to be operational in the year
2015, and only one new source (FRM-II) is currently under construction. In parallel
with the expected decline in the number of neutron sources, instruments in high
demand such as powder diffractometers, TOF - spectrometers, and SANS instruments
will suffer a dramatic decrease to even less than one third of the present level.
For Europe, the study shows that even the realisation of all the new projects
(ISIS upgrade, AUSTRON, European Spallation Source ESS, see the next paragraph)
would do no more than simply compensate for the predicted decline in current
capacity.
In the American region, on the contrary, realisation of the new projects would significantly strengthen the research capacity. In the Pacific region, the realisation of the planned sources would even exceed the present capabilities of the European and American regions. In conclusion, both the American and the Pacific regions have approved programmes that would eclipse the European lead in the next decade. Therefore realisation of possibly all the new projects for neutron sources in Europe is essential if Europe is to maintain pre-eminence in the field of neutron scattering.
World-wide Planned Projects
The Neutron Sources Working Group of the OECD Megascience Forum [Fejl! Henvisningskilde
ikke fundet.] proposes the following global concept, which includes AUSTRON,
to preserve research capacities:
· The construction of 3 - 4 large-scale neutron sources of the "next
generation" in the three world regions Europe, USA and the Pacific, i.e.
the ESS (Europe), SNS (USA), and JHF or/and NSRP (Japan) projects.
· The construction of new reactors and spallation sources with a regional
catchment area, i.e. the AUSTRON (Central Europe), FRM - II (Munich, under construction),
HIFAR - II (Australia) and IRF (Canada) projects.
· The upgrade of existing sources, i.e. the ISIS II (U.K.) and LANSCE
(USA) projects.
· The upgrading of instruments, i.e. the of ILL (France) and NIST (USA)
projects.
The American SNS project (1 MW) [Fejl! Henvisningskilde ikke fundet.] was granted considerable budget allocations for the year 1999 by Congress and Senate. The Japanese JHF project as part of a large-scale facility is in a financially secure planning position.
For the European Spallation Source ESS (5 MW) [Fejl! Henvisningskilde ikke
fundet.] a Feasibility Study was submitted in March 1997 and the ESF is now
asked to assess the project. According to its concept ESS would have a thirty
times higher beam power than the currently most powerful source, ISIS. The concepts
presented for the accelerator and the target are based on novel technology.
For both it is planned to seek for solutions in the framework of several research
projects