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Report on TESLA Collaboration Board Meeting
New Members of the TESLA Collaboration:
- Presentation of the Subdepartment of Particle Physics at
the University of Oxford S. Cooper
- Presentation of Sincrotrone Trieste C. Bocchetta
Status of TESLA A. Wagner
Status of TTF/VUV-FEL C. Pagani
(incl. Report from the Technical Board)
AOB
Frascati, 28 May 2003
1
TESLA Project Leader
• At the last TESLA meeting Carlo Pagani was elected as
project leader for two years, succeeding Dieter Trines
• Carlo took over on 1 February 2003
• Now, we have to look for a new chair of the Technical Board.
• The search will be done by the TESLA collaboration Search
Committee, chaired by J-E Augustin
2
A Model for a
European X-FEL Laboratory
European Governments
European XFEL Corporation
TESLA Linac Corporation
Members of Coll Board will consider possible
models, continue discussion in September
Lab 1 Lab 2 . . . Lab n
Linac Network
experiments
beam lines undulators Linac injector
3
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
4
European XFEL Laboratory
time schedule
2000 m 1200 m
start in 2005 ●●●●●●●●●●●●●●● complet in 2011 5
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.
6
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
7
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).
8
US-hosted Linear Collider Options:
A study commissioned by the
US Linear Collider Steering Group
G. Dugan
Laboratory for Elementary Particle Physics
Cornell University
Ithaca, NY 14853
9
Charge
Membership of the
• The Accelerator Subcommittee of
USLCSG Accelerator
Subcommittee:
the US Linear Collider Steering David Burke (SLAC)
Group (USLCSG) has been charged Gerry Dugan (Cornell) (Chairman)
by the USLCSG Executive Dave Finley (Fermilab)
Mike Harrison (BNL)
Committee with the preparation of Steve Holmes (Fermilab)
options for the siting of an Jay Marx (LBNL)
international linear collider in the Hasan Padamsee (Cornell)
Tor Raubenheimer (SLAC)
US.
• Two technology options are to be developed: a warm option, based
on the design of the NLC Collaboration, and a cold option, similar
to the TESLA design at DESY.
• Both options will meet the physics design requirements specified
by the USLCSG Scope document.
• Both options will be developed in concert, using, as much as
possible, similar approaches in technical design for similar
accelerator systems, and a common approach to cost and schedule
estimation methodology, and to risk/reliability assessments.
10
Scope of the LC - ECFA/DESY Study (Amsterdam)
• 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
11
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.
12
New SC Projects
• High Energy Physics
– TESLA
– Neutrino Factories and Muon Colliders
– Kaon Beam Separation at FNAL 200 MHz for Neutrinos
– New TEVATRON Injector
• Nuclear Physics
– RIA SNS
– EURISOL
– CEBAF Upgrade
• High Power Proton Linacs for Spallation
– SNS, Joint-Project, Korea, ESS
– ADS for Waste Transmutation
• New Generation Light Sources
– Recirculating Linacs (Energy Recovery)
– SASE FELs 13
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
14
Global Linear Collider Center – European Branch
Many other R&D activities have been co-ordinated by the
TESLA partners and others in preparation of the 6FP
(-> ESGARD, CARE…)
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 took place yesterday, chaired
by Nick
15
FP6 LC Design Study
• Use to form core R&D group within Europe for future Global
LC (GLC)
• Proposal must remain flexible with respect to linac
technology decision (2004)
• Focus DS on sub-systems other than linac technology
(sources, DR, BDS etc)
• DS will be based on existing LC net formed for CARE FP6
proposal
• Proposal will be drafted by ELCSC Accelerator sub-group
(and coordinated by N. Walker).
16
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
17
Next Steps - 2
• Establish list of work packages (already discussed by WG 1)
and responsibilities to get ready for mass production of
cryomodules
• Re-discuss during September meeting
Collaboration Board endorsed these steps
18
Final Comments
• Next TESLA meeting 15-17 September 2003 in Zeuthen
Many thanks to our hosts at Frascati for a very
pleasant and efficiently run meeting
19
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