WORKSHOP

 “APPLICATIONS OF TUNEABLE FEMTOSECOND VUV/X-ray SOURCES COMBINING
ACCELERATORS AND LASERS:
SLICING AT SOLEIL AND THE ARC-EN-CIEL PROJECT”


3rd and 4th of February 2004, Orsay, France
http://www.lure.u-psud.fr/congres/femto/default-eng.htm

The rise of intense femtosecond lasers has allowed, particularly in France,
the production of laser plasma sources and the realisation of the first
experiments applying these sources. In this way, solid state physicists,
biologists and chemists have become accustomed to new regimes in which
matter can be studied. Similarly, experiments coupling lasers and
synchrotron radiation open new perspectives for the study of the ultra-short
dynamics of excited systems. The production of ultra-short VUV/X-ray
radiation has become one of the major goals in the domain of “Lasers” and
“Accelerators”. Two projects have come to light: “slicing” on the SOLEIL
storage ring and the fourth generation source ARC-EN-CIEL. They will offer
to the user community the possibility to extend the temporal resolution of
their experiments to the femtosecond domain (100 fs = 10-13 s) and to expose
matter to brilliances several orders of magnitude higher than possible with
present sources. These two projects, which have reached a certain level of
maturity, share the same user community. We are organising this workshop to
evaluate the interest generated by these sources and to investigate their
most novel applications. Following a presentation of the projects concerning
these two sources, the scientific opportunities that they bring to the user
community will be discussed.


 « Slicing at SOLEIL »

The objective of the “Slicing” project is to develop two femtosecond X-ray
beamlines at SOLEIL. While keeping the performance of conventional
spectroscopy using synchrotron radiation, it will be possible to transfer
all of the potential offered by very high temporal resolution spectroscopy
to the soft and hard X-ray domains.
An intense femtosecond laser beam is coupled to the electron bunch
circulating in the ring to produce ultra-short pulses of synchrotron
radiation which are directly synchronised to the driving laser pulses. A
description of the project (slicing.pdf) is available on the website of the
workshop. It outlines the most important characteristics of this source.


ARC-EN-CIEL

The project of the fourth generation source, ARC-EN-CIEL, is based on a 700
MeV superconducting linear accelerator and is aimed to provide coherent
tuneable radiation of variable polarisation up to 1 keV. It combines the
advantages of free electron lasers, convention VUV sources such as
generation of harmonics in gases and those synchrotron radiation sources
with electron bunches of hundreds of femtoseconds. The coupling of an
intense femtosecond laser to the LINAC will also provide the possibility to
extend the spectral region to several tens of keV for experiments using
ultrafast X-ray spectroscopy. A document prepared in French describes in a
detailed manner the characteristics as well as the scientific case to which
it will allow access (ARC-EN-CIEL.pdf). A short version is also available in
English (ARC-EN-CIELva.pdf).



Date and Venue
The workshop will take place on Tuesday the 3rd and Wednesday the 4th at the
Lehmann amphitheatre at Orsay.

Contributions
In order to uncover original subject matter for the scientific case
distributed over a wide scientific field that will profit from these new
sources, we ask you to propose experiments using the “slicing” source,
“ARC-EN-CIEL”, or both.
Your contribution should be presented in the framework of the research
proposed, its interest and its novel aspects. It could be subject of a 15
min oral presentation or of a short 5 min presentation.
The title of your proposition should be submitted before the 8th of December
2003 on the workshop website (while making a full inscription). An extended
summary of 1 to 4 pages should then be send before the 15th of January 2004
to [log in to unmask] according to the template attached
(résumé.doc, abstract.doc).
If you cannot attend the workshop or if you do not wish to present your
ideas orally, a contribution will anyway be welcome so that you can be
included in the list of potential users.
Oral presentations (in powerpoint, pdf or if other please contact us) should
be submitted at the latest by the 26th of January 2004. In case of
difficulty at this point contact Chantal Jucha ([log in to unmask]).
 For the ARC-EN-CIEL project you can also send a proposal of intention to
Marie-Emmanuelle Couprie, (LURE, bât. 209 D, Univ. Paris-Sud, BP 34, 91 898
Orsay cedex, [log in to unmask]) by post or as an
attached pdf document.

Inscriptions
The inscriptions can be made online at the workshop website
(http://www.lure.u-psud.fr/congres/femto/). This should be done by the 8th
of December at the latest for those who wish to present an oral presentation.
 We count on your active participation and  look forward to meeting you at
the workshop to discuss the new scientific directions which these two
sources can stimulate.


Organisation

Chairs
M.E. Couprie (CEA-SPAM/LURE)  M. Meyer (LURE)  A. Rousse (LOA)
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Organisation Committee
D. Bolla (LURE/SOLEIL), D. Garzella (SPAM/LURE), M. Jablonka (CEA/SACM), C.
Jucha (LURE), P. Morin (SOLEIL), P. O'Keeffe(LURE).

Scientific Advisory Committee
M Belakhovsky (CEA-DFRMC), H. Cailleau (Univ. Rennes), J.-M. Filhol
(SOLEIL), J.-C. Gauthier (CELIA), B. Gilquin (CEA/DIEP), G. Le Lay (CRMC2),
F. Merola (LCP), P. Monot (CEA-SPAM), A. Mosnier (CEA-SACM), L. Nahon
(SPAM/LURE), R. Prazeres (LURE-CLIO), M. Sauvage (SOLEIL), F. Sirotti
(LURE), H.-P. Trommsdorff (LSP), M. Wullf (ESRF), P. Zeitoun (LIXAM)