Workshop on the development of future linear electron-positron colliders
for particle physics studies and for research using free electon lasers
23-26 September 1999



The accelerator based research program in Sweden is heavily focussed on the participation in the Large Hadron Collider project at CERN, and in the exploitation of the synchrotron radiation produced at MAXLAB in Lund. Those two projects actually take the largest share of the investment money provided by FRN. Looking into the future the experiments for the LHC are supposed to be ready by 2005, and the present plans of investments into the facilities at MAXLAB should be completed around this time. The next big step of improvement of instrumentation for both particle physics and for X-ray users seems to be connected with high energy linear colliders. In Europe both DESY and CERN are very actively pursuing different lines of accelerator studies in order to achieve collision energies in the range 500 to 5000 GeV where the postulated but yet hidden (supersymmetric, Higgs?) particles may be found and studied. As a byproduct a very intense source of 100 to 10000 eV photons can be provided with a peak brilliance more than seven to ten orders of magnitude better than provided by the ESRF today. The lower energy DESY proposal for TESLA and its FEL is much more advanced than the higher energy CERN studies and we expect a final DESY proposal to be submitted by 2001, including cost and time schedule. A site has already been secured as well as support from the regional authorities.

For the long term planning in Sweden it is important to consider priorities and how these new European facilites can be used. There is still time for important contributions to the development of the linear collider concept of CLIC at CERN. The particle physics community is clearly focussed on the concept of linear electron-positron colliders as the next major step for discovery beyond the LHC. New synchrotron radiation facilities have been created at many places and found users in many fields - it is however clear that the TESLA-FEL facility at DESY would be unique in its brilliance and short pulse length which would allow studies of, among other things, the dynamics of processes at the atomic level.

An international linear collider meeting was held in Uppsala in April 1996 (NIMRD9 398(1), 1997) with about 100 participants. Since then considerable progress has been made and we propose to arrange a three day Workshop in Lund during September 23-26, 1999 (Thursday afteroon till Sunday morning). This Workshop will be more restrictive, with about 50 participants, and focussing on the future Swedish participation in this field. It is aimed at providing a preview of the new possibilites offered and a first reaction among the potential users in Sweden. The program focusses on the following three topics:

  1. The technical progress of linear colliders in Europe
  2. Prospects for particle physics
  3. Prospects for experiments using FEL
In each of these sessions we will discuss various necessary R&D projects where Sweden could have an interest of participating. There would be about 12 invited talks by international experts (45') and a similar number of shorter contributions (20-30'). The aim is to publish a Proceedings within 3 months of the Workshop.

Those interested in participating in the workshop should fill in the registration form. Please register as soon as possible! Indicate
your time of arrival and if you want to have a single or double room. Hotel rooms have been reserved at Grand Hotel and nearby
Hotel Lundia in Lund (number 6 and 5 in the hotel guide). Travel instructions gives a description on various possibilities on how to get to Lund. About Skåne gives som tourist information.

Lund, June 30, 1999
Local organizing committee

Göran Jarlskog, Elementary Particle Physics
Leif Jönsson, Elementary Particle Physics
Ingolf Lindau, Synchrotron radiation Research
Torbjörn Sjöstrand, Theoretical Physics

Invited talks will be presented on:

The technical progress of linear colliders in Europe:

R. Brinkmann, DESY: The DESY linear collider project, TESLA

J.-P. Delahaye, CERN: The CERN linear collider project, CLIC

D. Schulte, CERN: Background at linear colliders

R. Heuer, Hamburg: A detector for TESLA

G. Materlik, Hamburg: TESLA as a photon source

Prospects for particle physics:

P. Zerwas, DESY: Physics at linear colliders

J. Ellis, CERN: Possibilities for CERN, beyond the LHC

Prospects for experiments using FEL:

M. Eriksson, Lund: FEL at MAXLAB

I. Lindau, Lund: The Stanford program

B. Sonntag, DESY: TESLA TTF scientific program

A. Snigirev, ESRF: Coherent Imaging with FEL

M. Wulff, ESRF: Subpicosecond time-resolved biology

W. Eberhardt, Juelich: Intensity fluctuations spectroscopy

S. Marchesini, ESRF: X-ray hologrophy

Convenors for the sessions above will be Leif Jönsson, Torbjörn Sjöstrand and Ingolf Lindau respectively.The convenors will complement the session programs of invited speakers as shown above with additional invitations for shorter contributions from mainly Nordic physicists and serve as discussion leaders. It is expected that there will be 30 speakers in total.

Preliminary schedule of talks and sessions.

Thursday (Biskopshuset) Friday (Biskopshuset) Saturday (Biskopshuset)
15.00-16.50  R. Brinkmann,
J.-P. Delahaye
9.00-10.50  D. Schulte
G. Materlik
9.00-10.50  Session TP 
in parallel discussion FEL
16.50-17.10 Coffee 10.50-11.10  Coffee 10.50-11.10  Coffee
17.10-19.00 P. Zerwas,
J. Ellis
11.10-13.00  Session FEL 11.10-13.00 Session TP, PPP
in parallell discussion FEL
20.00 Dinner Grand Hotel 13.00-14.30 Lunch Biskopshuset 13.00-14.30  Lunch Biskopshuset
14.30-16.20  Session FEL 14.30-16.20   Session PPP
16.20-16.40  Coffee 16.20-16.40  Coffee
16.40-17.25 R. Heuer 16.40-18.30  P.Hoyer
General discussion
17.25-19.00 session FEL 18.30  Buss to dinner somewhere
on the countryside
19.30 Dinner Grand Hotel

TP=technical prospects of detectors for particle physics
PPP=theoretical prospects in particle physics

Checkout from hotel and departure on Sunday morning.

Preliminary allocation of Hotels (please confirm participation if missing)

 Name Confirmation  Hotel
Jörgen Albertsson, CTH confirmed Lundia
Jens Als-Nielsen, Copenhagen confirmed Lundia, 24-25
Marco Battaglia, Helsinki confirmed Grand, 22-26**
Mikael Berggren, LPNHE-Paris 6-7 confirmed Grand, 22-26*
Reinhard Brinkmann, DESY  confirmed  Grand, 22-24**
Jean-Pierre Delahaye, CERN  confirmed  Grand
Håkan Danared, MSI confirmed Lundia
W. Eberhardt, Juelich  confirmed Grand
Tord Ekelöf, Uppsala confirmed Lundia
Curt Ekström, Uppsala confirmed Lundia
John Ellis, CERN confirmed Grand
Janos Hajdu, Uppsala confirmed Lundia
Rolf Heuer, Hamburg confirmed Grand
Paul Hoyer, Nordita confirmed Grand
Katri Huitu, Helsinki confirmed Grand
Gunnar Ingelman, Uppsala confirmed Lundia
S. Marchesini, Grenoble confirmed Lundia
Gerd Materlik, Hamburg confirmed Grand
Per Osland, Bergen confirmed Grand
Sören Pape Möller, Aarhus confirmed Lundia
Dag Reistad, Uppsala confirmed Lundia
Anders Rydberg, Uppsala confirmed Lundia, 23-24
Daniel Schulte, CERN  confirmed  Grand
Örjan Skeppstedt, MSI confirmed Lundia
Anatoly Snigirev, ESRF, Grenoble confirmed Grand, 22-26**
Bernd Sonntag, HASYLAB, DESY confirmed Grand, 22-26**
Pekka Suortti, Helsingfors confirmed Lundia
Michael Wulff, ESRF, Grenoble confirmed Lundia
Peter Zerwas, DESY  confirmed  Grand

All participants are assumed to arrive in the 23rd and depart on the 26th if there is no information otherwise. Please check in at Grand where you will find your folder with information.
* Participant arriving the 22nd will spend the first night at Hotel Överliggaren (near Lundia)
** Participants arriving the 22nd will spend the first night at Hotel Ahlström (number 1 in the hotel guide)