TESLA Collaboration Meeting at INFN-LNF
Status and Plans
for TESLA:
X-FEL and LC
Albrecht Wagner
Frascati, 26 May 2003
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Recommendations
concerning TESLA
The German Science Council has issued in November 2002 its
recommendations:
The Science Council requests the Federal Government to give its
binding consent to German participation in the LC as soon as
possible after the project proposal has been submitted with
specific details concerning international funding and international
cooperation.
The Science Council requests the Federal Government to give its
binding consent to German participation in the TESLA X-FEL
project as soon as possible after the revised project proposal has
been submitted .
This was the status at the last TESLA meeting at DESY in January
2003
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The TESLA Collaboration
• The TESLA Collaboration:
- at present 49 Institutes in 12
countries
New applications:
Oxford
Elettra
ITEP
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Government Decision on X-FEL
The decisions of the German Ministry for Education and Research
concerning TESLA was published on 5 February 2003:
DESY in Hamburg will receive the X-FEL
Germany is prepared to carry half of the 673 MEuro investment
cost.
Discussions on European cooperation will proceed expeditiously, so
that in about two years a construction decision can be taken.
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A Model for a
European X-FEL Laboratory
European Governments
European XFEL Corporation
TESLA Linac Corporation
experiments
Lab 1
Lab 2
...
Lab n
Linac Network
beam lines
undulators
Linac
injector
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Next Steps towards a European X-FEL
• Discussion with European partners interested in the
construction of the linear accelerator and the laser facility
• Formation of a planning group with members from all
countries interested in the participation in the construction
of the linear accelerator and the laser facility
• Analysis of the present concept for the linear accelerator
and the laser facility by the planning group
• Adaptation of the project parameters to include the
findings and recommendations of the planning group
• Continuation of the R&D work on the linear accelerator,
undulators, beam lines and experiments of the X-FEL
laboratory
• The design work on the XFEL accelerator will be largely
applicable for the main accelerator of a cold LC
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What has Happened since February on the X-FEL
• Discussions with potential users (-> workshops)
• Discussions with the members of the TESLA collaboration
• Discussions among Funding Agencies (ESFRI)
next meeting on 4 July, 1 international and many national
projects
• Discussion with politicians in Germany
• Study of possible phase space of X-FEL parameters
(R. Brinkmann)
• Study of alternative site(s)
• Question of names (VUV-FEL, X-FEL, TESLA …)
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European XFEL Laboratory
time schedule
2000 m
1200 m
start in 2005 ●●●●●●●●●●●●●●● complet in 2011
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Of Key Importance for X-FEL: TTF2 VUV FEL
TTF1 will be extended to
reach 1 GeV in 2003
and become a user facility
in 2004
TTF1
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PITZ
Photo Injector Test Facility for FELs and LCs
Collaboration & partners
BESSY, MBI, TU Darmstadt & DESY *
INFN Milano, PI Yerevan, INRE Sofia, HEPI Tbilisi, IINR Troitzk
very small transverse emittance
(3-4 p mm mrad @ 0.5 nC)
stable production of short bunches with
small energy spread
experimental optimization including all
sub-systems  extensive beam dynamics
studies
provide improved guns for TTF2/FEL in
September 03
develop and test a high duty cycle gun
cavity
remote operation / GAN/ FNAL,
Frascati,HH,Zeuthen
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TESLA
and the international LC
Daresbury, 23 –25 September
2002
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Government Decision
on LC
Today no German site for the TESLA linear collider will be put
forward.
This decision is connected to plans to operate this project within
a world-wide collaboration
DESY will continue its research work on TESLA in the existing
international framework, to facilitate German participation in a
future global project
BMBF report to Parliament commission on Research:
DESY will remain a world-wide leading centre of particle physics.
The decision to not propose a site today is not meant as a
reduction of the importance of particle physics in Germany.
Ministry followed recommendation of German particle physicists
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Consequences for the LC
The path chosen by TESLA to move towards approval was
recommended by the German Science Council and is generally
considered to be the fastest one.
Community will now take the other path used for international
projects (e.g. ITER):
• unite first behind one project with all its aspects, including the
technology choice, and then
• approach all possible governments in parallel in order to trigger
the decision process and site selection.
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LC: What has Happened since 2001?
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ACFA, ECFA, HEPAP scientific recommendations
TESLA TDR in March 2001
OECD Global Science Forum (2002 and continuing)
JLC Road Map in February 2003
International Technical Review (2003)
ILCSG and regional steering groups
German Science Council recommendations
German Government decision
Discussion among funding agencies
Discussion in CERN Council about CERNs role in a LC
WGs on organisational matters
GAN workshops
etc….
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LC Steering Groups
ICFA initiative for an international co-ordination:
Asian SG
Gov
US SG
Gov
European SG
Gov
ECFA
International LC SC
First proposed Feb. 2002 (J. Dorfan), very active since Aug. 2002
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The Scientific Case
…The theme: see ‚Consensus document‘
http://sbhep1.physics.sunysb.edu/~grannis/wwlc_report.html
A world-wide consensus has formed for a baseline LC project in
which positrons collide with electrons at energies up to 500 GeV,
with luminosity above 1034 cm-2s-1.
The energy should be upgradable to about 1 TeV.
Above this firm baseline, several options are envisioned whose
priority will depend upon the nature of the discoveries made at
the LHC and in the initial LC operation.
The consensus document is presently being signed by scientists
all around the world.
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The Scientific Case - 2
ECFA Workshop in Amsterdam:
• Conclusion of the ECFA/DESY workshop #3
• Start of the new ECFA workshop
Excellent attendance, many new results
Definition of European view on ‚scope‘ of LC
Detector R&D
• DESY through its PRC acts as ‚review body‘ for world-wide
detector R&D
• Many interesting activities, some also with possible impact on XFEL instrumentation
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Scope of the LC - ECFA/DESY Study (Amsterdam)
Phase 1
• A cms-energy range of 91 to 500 GeV
• At 500 GeV instantaneous luminosity and reliability sufficient to
deliver a total of some 500 fb-1 in the first 4 years of running
• tunnel and floorspace available for two interaction regions, at
least one of them with finite crossing angle, and at least one
fully functional detector
• both interaction regions allowing the same energy range and
luminosity for e+e- collisions
• 80% electron polarisation
• capability to run e-e- experiments
• possibility to get to higher energies (some 750 GeV cms)
without increasing cooling and RF power, i.e. with reduced
luminosity at increased gradient
Priorities on the options listed below will depend on the results
obtained from LHC and the first phase LC.
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International TRC
Results from International Technical Review (Feb. 2003)
Quotes:
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Progress on TESLA Technology
Due to the XFEL DESY (and partners) will focus in preparation
of collider very much on linac related issues (industrialisation,
reliability, high gradient programme)
First high power test of an
electro-polished cavity
very good result, similar to
vertical test
It is essential to continue
the R&D on high gradient
cavities -> beam tests
Of top priority for
technology decision
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Next Steps for TESLA
The focus of the work: reach the R1 milestone, as defined in the
ITR report (test of one module with beam at 35 MV/m). Due to the
extremely tight financial situation at DESY in 2003 this goal will
not be reachable within one year. It is therefore very important to
approach this goal as much as possible until spring 2004:
Test as many 9-cell cavities as possible, with full power for as long
as possible at their highest gradient (35 MV/m). Test with a first
9-cell cavitiy have shown very promising results.
In addition it would be very good if at least one 9-cell cavity could
be tested with beam (under investigation).
In order to prepare the construction of the X-FEL, DESY and its
partners will soon focus on issues related to the mass production of
all components. This will lead within one to two years to further
improvements of the technical design and a better cost evaluation.
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Technology Recommendation
Aim at joint selection of one technology in 1 year.
How:
• Gather a committee of wise persons, who use criteria to be
developed by the ILCSC, to recommend a technology choice to the
ILCSC.
• The regional steering committees will each nominate 4 persons
from which the ILCSC will choose three from each list for a total
of 9 wise persons.
First discussion of the make-up of the committee in August.
Advice in this will be widely sought from the community.
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TESLA and the Technology Choice
• If the chosen technology is ‚cold‘, a major synergy will exist
between the work on the X-FEL and the LC:
– SC technology, mass production, reliability, all RF issues
(klystrons, LLRF, RF distribution and components ..)
– Fast orbit feed back
– Damping ring kicker system (X-FEL beam distribution)
– Beam diagnostics
– ….
• If the chosen technology is ‘warm’, a major rethinking is
necessary. In this case the role of DESY (and possibly some
of the TESLA partners?) will be less pronounced, due to the
commitment to the X-FEL.
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Global Linear Collider Center
All (ILCSG) agree that it would be highly desirable to form a
precursor to the Global Linear Collider Center:
Core group to begin making an international design, based on
accumulated work to date, but reexamined in a completely
international context.
In parallel to the work of the design group:
preparation of political decision, definition of organisational
structure, site analysis
Aim at approval of LC around 2006/2007
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Global Linear Collider Center – European Branch
A draft proposal (‘Design Study’) for the European branch of
such an international design team is presently being prepared
for the EU.
Meeting of interested people later this afternoon.
Many other R&D activities have been co-ordinated by the
TESLA patners and others in preparation of the 6FP
(-> ESGARD, CARE…)
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The Role of CERN
CERN wants and needs to play a leading role in a Next Linear
Collider
Discussions in SPC and Council have just started
A network would provide a good framework
The timing is a matter of resources
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Site Planning Status
Agreement between the states
Schleswig-Holstein and Hamburg for
joint legal procedure
Preparation nearly completed, but
process presently stopped (but is
ready to continue)
Government decision has triggered a
re-thinking of the site for the X-FEL.
Try to collect the facts and discuss
with future users
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Some Design Aspects
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Various other Matters
• Visit of J. Marburger to DESY in March 2003
• US SCLC steering group and comparative cost study: recent
visit to DESY (see talk by G. Dugan)
• Science Forum on DESY, X-FEL and LC in Hamburg on 11
June 2003, with Ministers E. Bulmahn and J. Draeger (HH)
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The Strategic Elements of DESY‘s
Future
The strength of DESY lies in its structure:
Accelerators, particle physics, research with photons
Current Projects:
HERA
Upgrade Project: PETRA SR
Planned Projects:
TESLA LC
DORIS
VUV-FEL
TESLA X-FEL
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PETRA III
Project approved by BMBF (~100 MEuro)
Features of PETRA III:
• High brilliance (>~ ESRF, APS)
• Beam stability
• energy: 6(7) GeV
• current: 100(200) mA
• beam size: 30 x 3 μm2
• 13 undulator stations
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The DESY Future – Programme-oriented Funding
BMBF
+
States
Health
Transport and Space
Energy
Earth and Environment
Structure Of Matter
Key technologies
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The Five Programmes
• Elementary Particle Physics (DESY, FZK)
• Astroparticle Physics (FZK, DESY)
• Physics of Hadrons and Nuclei (GSI, FZJ, FZK)
• Condensed Matter Physics (FZJ, FZK)
• Large Facilities for Research with Photons, Neutrons and Ions
(DESY, FZJ, FZK, GKSS, GSI, HMI)
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Next Steps
The proposed next steps are based on the assumption that the
linear accelerator for the X-FEL will be built as a joint project
of European accelerator laboratories. The detailed
specifications of the accelerator will be determined by the
beam properties required for the X-FEL:
• Bring into operation, together with the TESLA partners, the
extended TESLA Test Facility (TTF2), in order to provide a new
high power VUV-FEL light source for research starting in 2004
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Next Steps
•
•
•
•
X-FEL
Continuation of the R&D work for the X-FEL accelerator
Formation of a planning group with all interested partners
(including future users)
Analysis of the present concept for the linear accelerator, as
described in the TDR supplement, and the laser facility by the
planning group
Adaptation of the project parameters to include the findings
and recommendations of the planning group
Linear Collider
• Continuation of the high gradient programme (construction,
optimisation and tests of cavities with 35 MV/m)
• Build-up of a European LC Design Teams as part of an
international Design Team
• Participation in the LC working groups of ICFA and ECFA
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DESY Advisory Bodies
• The DESY Scientific Council
has confirmed the policy and priorities as described above:
– Road map towards X-FEL
– Next steps towards a LC
• The DESY MAC
will look in June at both, the progress in TTF and the
planned high-gradient programme
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Conclusion
Based on the work of the TESLA collaboration during the past
decade
Germany has proposed to finance half of a European X-FEL and
to support further work on the TESLA LC within an
international collaboration.
This creates outstanding opportunities for all partners:
• Advance the design and the TESLA technology in order to build
the X-FEL
• Use this momentum to advance the case for a global LC
Exciting times and lots of work lie ahead, let us tackle
the tasks.
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