Accelerators, Cryogenics and Magnetism Division (DACM)

DACM is division of the Institute of Research into the Fundamental Laws of the Universe (IRFU), of the CEA Physical Sciences Division (DSM). It is located on the Saclay center in the premises of the former National Laboratory Saturne, LNS, and the former Department of Instrumental Techniques of Elementary Particles, the STIPE. These premises have been renovated and gathered in a large platform called "Synergium" which occupies a total floor area of 25,000 m2. DACM which hosts 75 research engineers and 45 technicians has for mission to carry out, with the national and international community, research and development of excellence in the fields of particle accelerators, cryogenic systems and superconducting magnets for use in fundamental research. The Department has played a major role over many years in the construction of the high technology instruments needed for this type of research (LHC, W7-X, SPIRAL2, FAIR, IPHI, ESS).


The expertise of the Department has also been deployed in support of work in associated fields including energy (materials studies for thermonuclear fusion as part of the IFMIF project, qualification of the coils of the Japanese JT-60SA Tokamak), life sciences (the ISEULT ultra high field magnetic resonance imager for NEUROSPIN) and light sources (SOLEIL and XFEL).


DACM also provides management services for major large scale projects and develops the associated test systems. These projects are carried out within the project structure of the IRFU in close association with other departments of the Institute, both physical and technology, particularly the Department of System Engineering, SIS. Finally the technology transfer to industrial partners constitutes a core component of the work of the Department.


DACM brings together strengths in both the design and construction of large scale systems. The expertise of the division extends to the fields of accelerator theory, ion sources, conventional and superconducting accelerating cavities, superconducting magnets, and the associated cryogenic systems. It is based on a wide range of test systems, from small test stations used to characterize materials to very large scale systems capable of testing entire superconducting coils and cavities. The vitality of DACM is also due in a large part to the contribution of young PhD students and post-doctoral researchers within the R&D teams. This continual influx of new ideas enables the division to explore new technologies for use in designing and constructing the instruments needed to support advances in applied fundamental research.


The workforce of DACM is divided among five laboratories:

  • the Accelerator Design and Development Laboratory (LEDA),
  • the Accelerator and Hyperfrequency Systems Engineering Laboratory (LISAH),
  • the Cavity and Cryomodule Development and Integration Laboratory (LIDC2),
  • the Laboratory for Superconducting Magnet Research (LEAS),
  • the Cryogenics Laboratory and Test Stations (LCSE).


A Scientific and Technical Committee, the CSTS, composed of 14 members and 7 international experts from outside the CEA, meets once a year to evaluate ongoing activities and examine new proposals. The CSTS assists the Head of the DACM in defining research and development strategy within the Department.


In the last three years, DACM has scored a number of successes: the injectors of SPIRAL2 and IFMIF have been tested in an operational situation in their bunkers inside the Synergium and have achieved their nominal performance. The 51 tons of superconducting material necessary for the ISEULT project were produced and 170 double pancakes were wound with the required accuracy. The development of innovative antennas for medical imaging has continued with success. Sources of SILHI type will now be industrialized and beam dynamics softwares are marketed worldwide. In October 2012, the JT-60SA cold test station received its imposing  cryostat.


Over the next three years efforts will focus on commissioning the IPHI injector, on the industrial phase of XFEL cryomodules assembly, as well as on the construction and testing of two innovative cryomodules: the prototype cryomodule for the IFMIF-LIPAC accelerator, and the technology demonstrator for ESS. DACM will also contribute to the progress of the project CILEX in view of new acceleration techniques and deliver the proton injector FAIR project in Darmstadt. In the field of cryomagnetism the JT-60SA test station will be commissioned in 2014 and will open technological extensions for the ITER program. The spectrometer R3B-Glad will be cryostated and tested. The imaging magnet NEUROSPIN-ISEULT will be cryostated to get its ambitious performances in terms of magnetic field homogeneity and stability. The DACM will also participate strongly to the development of new high-field magnets needed to increase the luminosity and energy of the LHC.


By 2017 and within its complementary activities of accelerators and cryomagnetism, the DACM will be intensely involved in exciting projects equal to the major scientific missions of the CEA. Moreover the DACM will resolutely participate, together with the nearby communities, in the launching and the success of the campus of the Paris-Saclay University.


Antoine Daël, head of DACM






Last update : 08/11 2017 (732)

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