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									          Meeting of the
European Global Design Effort

       Oxford, 25 October 2005

    TESLA Technology
           Carlo Pagani
      University of Milano and INFN
                                 Memories - 1

               July 1990: 1st TESLA Workshop at Cornell
                    Conveners: Ugo Amaldi (CERN) & Hasan Padamsee (Cornell)
General consensus to setup an international Collaboration
to study the cold option for the future electro-positron collider

           March 1991: 1st Informal Meeting at DESY
Biörn Wiik invites at DESY representative experts to propose DESY
as the Hosting Laboratory for the envisaged TESLA Collaboration

January 1992: 1st TESLA Collaboration Board Meeting
to discuss a draft version of the “Interlaboratory MoU for the
TESLA Collaboration” to be signed by the interested Institutions

  December 1992: Decision for Infrastructure and TTF
“A Proposal to Construct and Test Prototype Superconducting RF
Structures for Linear Colliders” - TESLA Note 93-01
                                                                                  EGDE Meeting
Carlo Pagani                                  2                               Oxford, 25 October 2005
                       Memories - 2

                May 1996: First Beam at TTF
One 8 cavity module accelerates the electron beam at the
unprecedented gradient of 15 MV/m

          March 2001: TESLA Technical Design Report
A complete Technical Design Report is presented for the construction
of a 500-800 GeV SC electron-positron collider, named TESLA

        February 2003: Green Light from the ILC-TRC
The ILC-TRC states that the TESLA Technology is already mature to
built a 500 GeV electron-positron collider

     20 August 2004: ITRP recommends “Cold”

                                                           EGDE Meeting
Carlo Pagani                     3                     Oxford, 25 October 2005
               From the Interlaboratory MoU

Art. 1 – Goal of the Collaboration

It is the aim of this collaboration to establish the technological base
needed to construct and operate a high energy electron-positron
linear collider (or other accelerators) made of superconducting rf
cavities and demonstrate that this collider can meet the performance
goals in a cost effective manner. …… This program of TTF (TESLA
Test facility) includes the construction of the infrastructures needed
to produce high performance cavities and the construction and the
operation of a test linac

It is the intention of the collaboration to create the conceptual
design report of an electron-positron linear collider facility covering
the energy region up to 500 GeV or above with a luminosity of the
order of 5.1033cm-2s-1. It is not the specific goal of this MoU to cover
the effort needed to carry out this conceptual design.

                                                               EGDE Meeting
Carlo Pagani                        4                      Oxford, 25 October 2005
                 International Collaboration to:

Establish the technological base for a cost effective Superconducting
  Linear Collider (and future SC accelerators)
Support an R&D program carried out at DESY, TTF, setting up
     – An infrastructure:
          • to develop the status of art for high field cavity fabrication, processing and
          • to understand and define all the critical steps needed to guaranty the
            production of a high field cavity;
          • to transfer to industry the fabrication process, while setting standards for
            the required quality control;
     – A test linac:
          • to develop and test cavity ancillaries, cryomodules and associated systems
            as: RF, cryogenics, vacuum, etc.
          • to create the culture for operation, controls and diagnostic,
          • to test the limits in order to improve component and sub-system engineering
          • to create a MTBF component database to focus details to be reviewed in
            view of the high reliability and availability required by the Linear Collider

                                                                              EGDE Meeting
Carlo Pagani                                 5                            Oxford, 25 October 2005
               First 7 year balance (1992-98)

               Funding                                Design

Major Contributing Countries          Major Contributing Institutes
(including personel)                  (in alphabetic order)

Germany (DESY + )        ~ 50%             CEA/IN2P3

France (CEA + IN2P3) 10-15%
Italy (INFN)             10-15%
USA (Fermilab + )        10-15%            Fermilab & Cornell for USA

> 100 Million DM Invested on the TESLA SRF Technology

                                                                  EGDE Meeting
Carlo Pagani                      6                           Oxford, 25 October 2005
               The Infrastructure

                                        EGDE Meeting
Carlo Pagani            7           Oxford, 25 October 2005
                The TESLA Test Facility – TTF

          e- beam                                                 e- beam
        diagnostics                         bunch               diagnostics       laser driven
                      undulator           compressor                              electron gun

photon beam                                                              pre-
                                  superconducting accelerator
 diagnostics                                                          accelerator
                 240 MeV                 120 MeV                16 MeV          4 MeV

                                                                              EGDE Meeting
Carlo Pagani                               8                             Oxford, 25 October 2005
         TESLA Collaboration as in August 2004

                                     53 Institutes in
                                      12 Countries
                                DESY Mission now focussed on
                                 Advanced Light Sorces and
                                      related science
                               TTF 2 becoming a VUV-FEL user
                               TESLA Collaboration new Players
                                  focussed on FEL and CW
                                Original strong members much
                                          less active

                                                      EGDE Meeting
Carlo Pagani               9                      Oxford, 25 October 2005
               New TESLA Collaboration Mission

As from the TESLA Collaboration Board, Orsay, September 7, 2004

The role of the collaboration is to advance SRF technology research
and development and related accelerator aspects across the broad
diversity of scientific applications, and to keep open and provide a
bridge for communication and sharing of ideas, developments, and
testing across projects.

To this end TTF and module test stands will continue to be used as a
test bed for new developments and experiments in SRF technology,
beam and light physics, and associated developments such as
instrumentation and diagnostics.

The collaboration will support and encourage free and open exchange
of knowledge, expertise, engineering designs, and equipment.

                                                              EGDE Meeting
Carlo Pagani                       10                     Oxford, 25 October 2005
               Memorandum of Understanding

The MoU of the TESLA Technology Collaboration, defines the
mission, the organization, the role of the Collaboration and Technical
Boards, the membership, intellectual property, and publication
Institutions which were members of the TESLA collaboration will
become members of the TESLA Technology Collaboration without
further action by the CB. In view of the redefined mission of the
Collaboration each Institution will be asked, however, whether it
wants to remain member of the Collaboration. Each Institution will be
asked to sign the MoU in the form of a bilateral agreement with
New Institutions which desire to join the TESLA Technology
Collaboration will present a proposal for their membership to the CB.
                                                  Albrecht Wagner, 30 March 2005

SLAC and KEK are among the new members
ORNL and LANL are willing to become members
                                                                EGDE Meeting
Carlo Pagani                      11                        Oxford, 25 October 2005
        1st TTC Meeting at DESY on April 2005

Three presentations to summarize TESLA technology related R&D
activities and plans in the US, Europe and Japan.

Industrialization as a recurrent theme (special plenary on Thursday)

Three Working Groups
  WG-1: R&D for high-quality large-scale cavity production
  WG-2: Next-generation cavity infrastructures
  WG-3: Auxiliaries & module integration

Most of the TTC discussion themes further developed at the:
13th Workshop on RF Superconductivity, Cornell, July 2005
2nd ILC Workshop (mainly WG 5), Snowmass, August 2005
1st SMTF Meeting, Fermilab, October 2005
CARE/JRA1 Annual Meeting, Legnaro, October 2005
                                                             EGDE Meeting
Carlo Pagani                      12                     Oxford, 25 October 2005
           2nd TTC Meeting at LNF on Dec 2005

                         WG-1: Preparation of SC cavities
                         WG-2: Technical Specification for Infrastructures
                         WG-3: Module Test Stands

                                                                EGDE Meeting
Carlo Pagani                  13                            Oxford, 25 October 2005
                         A few Comments

The TESLA Technology Collaboration is an international/interregional
instrument to:

     – Share information, experience, drawings and results
     – Improve synergies between different projects based on the TESLA
       Technology: pulsed and CW, electrons and protons
     – Share TTF operation experience

Can we expect more for ILC ? May be, but it must be created and we
cannot expect DESY being the unique driving force (X-FEL).
A few ideas for discussion:

     – Coordinate the “Cold Technology” effort for ILC in the three Regional
       Infrastructures and Test Facilities
     – Define and support a new SRF Cavity Infrastructure for Europe (FP 7)

                                                                   EGDE Meeting
Carlo Pagani                          14                       Oxford, 25 October 2005
               Global SCRF Test Facilities for ILC

      TESLA Test Facility (TTF II) @ DESY
           TTF II is currently unique in the world
           VUV-FEL user facility
           test-bed for both XFEL & ILC
           Cryomodule Test Stand under construction

      SMTF @ FNAL
           US Labs: Cornell, JLab, ANL, FNAL, LBNL, LANL, MIT,
           MSU, SNS, UPenn, NIU, BNL, SLAC + DESY-INFN-KEK
           Test Facility for ILC, Proton Driver, RIA (and more)
      STF @ KEK
           aggressive schedule to produce high-gradient
           (45MV/m) cavities / cryomodules – ILC Dedicated
           International collaborations are welcome

                                                                      EGDE Meeting
Carlo Pagani                           15                         Oxford, 25 October 2005
      Coordination of Regional Infrastructures?

It would be very useful but it is not straightforward

In that case we can imagine a more International
Collaboration with a much les pronounced European role

How the TESLA Technology Collaboration could coordinate
effort and investments that are mostly national? It has to
be proven. No funding is expected to flow through TTC

What could be the foreseen connection between TTC and
the other TTC supported project?

What is the possible relation between TTC and GDE?

                                                    EGDE Meeting
Carlo Pagani                16                  Oxford, 25 October 2005
                           TTC and FP7

TTC could be used to prepare a request to EU for funding a new
generation SRF Infrastructure in Europe

This looks very attractive. TTF Infrastructure is “old” and X-FEL has
strong priority. Nevertheless two conditions are required to recreate
the momentum of the old TESLA:
• A leading Lab/Institution willing to invest resources:
     – DESY, CERN, France, Italy, UK in the order
•   Major European Institutions willing to invest consistent resources.
     – As for SMTF and STF major non-European SRF Labs should contribute

The definition and support of a modular infrastructure, designed to
set QA, QC and parameters for reliable industrial production is
conceivable. EU is supposed to be positive.

           ~ 30 M€: 15 from EU, 7-8 from the hosting lab
                                                               EGDE Meeting
Carlo Pagani                         17                    Oxford, 25 October 2005
                     Concluding Remarks

The cold technology chosen for the ILC has been developed in the
framework of the TESLA Collaboration by the TESLA Collaboration
Members. The European role has been dominant
DESY, as hosting laboratory, gave the major contribution and retains
most of the operation and system experience, but not all.
Part of the TESLA Collaboration experience is contributing to the ILC
through the EU Programs: CARE, EUROTeV et al.
TTF2 is a unique tool both for XFEL and ILC dvelopment. It is the
major contribution of the TESLA Collaboration to these projcts.
The TESLA Collaboration Mission has been slightly reviewed (Orsay, 8
Sep. 04) to better contribute to the several major projects, such as
the XFEL or the ILC, which are based on the use of SRF technology
TTC can be one of the tools being used to maintain an European
leadership in the SRF Technology. But:
               who is effectively working for that?
                                                            EGDE Meeting
Carlo Pagani                     18                     Oxford, 25 October 2005

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