Dr. Claude Cavailler Profile

Dr. Claude Cavailler

Project Leader at Commissariat à l'Energie Atomique

SPIE Involvement:

Author

Proceedings Article | 17 March 2005 Paper

LIL and LMJ laser facility status

Claude Cavailler, Noel Fleurot, Jean-Michel Di Nicola

Proceedings Volume 5580, (2005) https://doi.org/10.1117/12.569638

KEYWORDS: Crystals, Optical amplifiers, Diagnostics, Picosecond phenomena, Deformable mirrors, Spatial filters, Prototyping, Control systems, Polishing, Fusion energy

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Proceedings Article | 17 April 2001 Paper

AIRIX: a new tool for flash radiography in detonics

Claude Cavailler

Proceedings Volume 4183, (2001) https://doi.org/10.1117/12.424284

KEYWORDS: X-rays, Radiography, Electron beams, Sensors, X-ray detectors, Magnetism, Prototyping, Reliability, Cameras, Diodes

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AIRIX is an induction linear accelerator which will be used for flash radiography in Commissariat A L'Energie Atomique In France. Designed to produce an X-ray dose of some hundreds Rads at 1 meter with an X-ray focal spot size diameter of less than 2 mm (LANL-CEA DAM definition), this facility consists in a 3,8 MeV/2 kA pulsed electron injector and 15,4 MeV induction accelerator powered by 32 high voltage generators. A prototype of this accelerator, called PIVAIR, has been studied and realized in CEA CESTA near Bordeaux. PIVAIR is a validation step for AIRIX at 8 MeV. It includes an injector (3,6 MeV, 3,2 kA, 60 ns) and 16 induction cells supplied by 8 high voltage generators (250 kV, 70 ns). Two different technologies of induction cells have been tested (Rexolite insulator or ferrite Under Vacuum). We have chosen ferrite under vacuum cells technology after comparison of results on beam transport and reliability tests. A focusing experiment at 7.2 MeV of the electron beam has been achieved during summer 1997. We have begun to produce X-rays in October 1997. A dose level of 50 Rad at 1 meter has been achieved with an X-ray spot size diameter of 3.5 to 4 mm (LANL-CEA DAM definition). Static flash radiography of very dense object have been achieved from November 1997 until February 1998. We have been able to test in situ new kinds of very high sensitive X-ray detectors and to check they had reached our very ambitious goals: quantum efficiency at 5 MeV > 50% instead of 1% for luminous screens and film, sensitivity < 10 (mu) Rad (100 time more sensitive than radiographic luminous screens and films), dynamic range > 100, resolution < 2 mm. The AIRIX accelerator has been built in the CEA-MORONVILLIERS test site near Reims under an industrial collaboration with the THOMSON- CSF Company. It is housed in a reinforced concrete bunker and has an overall length of 60 meters. The 20 MeV electron beam has been focused on a 1 mm thick Tantalum target to produce an X-ray fluence of more than 300 Rads at one meter from the target. The result is a single radiograph of the device explosion under test with the high stopping power detector located in a blast protection set behind the device. In this communication we will present all these techniques which correspond to a significant effort of CEA begun in 1992. AIRIX facility will be available to run detonics experiments before end of 2000.

Proceedings Article | 22 June 1999 Paper

AIRIX: an induction accelerator facility developed at CEA for flash radiography in detonics

Claude Cavailler

Proceedings Volume 3516, (1999) https://doi.org/10.1117/12.350500

KEYWORDS: Radiography, X-rays, Sensors, Electron beams, Telecommunications, Prototyping, Reliability, Quantum efficiency, Imaging systems, Cameras

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AIRIX is an induction linear accelerator which will be used for flash radiography in CEA/DAM. Designed to produce an X-ray dose of more than 500 Rads at 1 meter with an X-ray focal spot size diameter of less than 2 mm (LANL-CEA DAM definition), this facility consists in a 4 MeV/3.5 kA pulsed electron injector and 16 MeV induction accelerator powered by 32 high voltage generators. A prototype of this accelerator, called PIVAIR, has been studied and realized in CEA CESTA near Bordeaux. PIVAIR is a validation step for AIRIX at 8 MeV. It includes an injector (4 MeV, 3.5 kA, 60 ns) and 16 inductor cells supplied by 8 high voltage generators (250 kV, 70 ns). Two different technologies of induction cells have been tested (rexolite insulator or ferrite under vacuum). We have chosen ferrite under vacuum cells technology after comparison of results on beam transport and reliability tests. A focusing experiment at 7.2 MeV of the electron beam as been achieved during summer 1997. We have begun to produce X-rays in October 1997. A dose level of 50 Rad at 1 meter has been achieved with an X-ray spot size diameter of 3.5 to 4 mm (LANL-CEA DAM definition). Static flash radiography of very dense object have been achieved from November 97 until February 98. We have been able to test in situ new kinds of very high sensitive X- ray detectors and to check they had reached our very ambitious goals: (1) quantum efficiency at 5 MeV greater than 50% instead of 1% for luminous screens and film; (2) sensitivity less than 10 (mu) Rad (100 time more sensitive than radiographic luminous screens and films); (3) dynamic range greater than 100; (4) resolution less than 2 mm. We will present in this communication brand new kinds of detection systems, called high stopping power detectors, such as: (1) (gamma) camera with segmented thick crystal of BGO and MCP image intensifier; (2) multistep parallel plate avalanche chamber; (3) pixellized CdTe MeV photoconductor matrix. AIRIX accelerator is being built by THOMSON CSF Company in CEA Moronvilliers near Reims. It is housed in a reinforced concrete bunker and has an overall length of 60 meters. The 20 MeV electron beam will be focused on a 1.5 mm thick Tantalum target to produce an X-ray fluence (flux) of more than 500 Rads one meter from the target. The result is a single radiograph of the device explosion under test with the high stopping power detector located in a blast protection set behind the device. In this communication we will present all these techniques which correspond to a significant effort of CEA begun in 1992. AIRIX facility will be available to run detonics experiments before end of 2000.

Proceedings Article | 30 May 1995 Paper

Review of low x-ray fluence detection developments on flash radiography

Claude Cavailler

Proceedings Volume 2513, (1995) https://doi.org/10.1117/12.209661

KEYWORDS: X-rays, Radiography, X-ray detectors, Explosives, Detector development, X-ray sources, Sensors, Photons, X-ray imaging, Image analysis

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Proceedings Article | 1 January 1993 Paper

Measurement techniques in detonics

Claude Cavailler

Proceedings Volume 1801, (1993) https://doi.org/10.1117/12.145845

KEYWORDS: X-rays, Cameras, Mirrors, Radiography, High speed photography, Explosives, High speed photonics, X-ray sources, Streak cameras, Optoelectronics

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Proceedings Article | 1 January 1992 Paper

New optical instantaneous imaging laser technique in detonic experiments

H. Croso, Claude Cavailler, Patrick Mercier, Gilles Behar, M. Henry

Proceedings Volume 1539, (1992) https://doi.org/10.1117/12.50551

KEYWORDS: Cameras, Mirrors, High speed photography, Laser optics, Copper, Image intensifiers, Speckle, Laser development, Camera shutters, Photonics

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Proceedings Article | 1 June 1991 Paper

MCP image intensifier in the 100-KeV to 1-MeV x-ray range

Jacqueline Veaux, Claude Cavailler, Jean-Pierre Gex, Alain Hauducoeur, M. Hivernage

Proceedings Volume 1449, (1991) https://doi.org/10.1117/12.44261

KEYWORDS: Image intensifiers, X-rays, Microchannel plates, Electrons, X-ray imaging, Quantum efficiency, Spatial resolution, Signal to noise ratio, Modulation transfer functions, Gold

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Proceedings Article | 1 April 1991 Paper

Evolution of high-speed photography and photonics techniques in detonics experiments

Claude Cavailler

Proceedings Volume 1358, (1991) https://doi.org/10.1117/12.24053

KEYWORDS: High speed photography, Photonics, Laser optics, Optoelectronics, Mirrors, Thermography, Kinematics, Thermodynamics, Cameras, Time metrology

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Showing 5 of 8 publications

SPIE Conference Volume | 1 August 2003

25th International Congress on High-Speed Photography and Photonics

Conference Committee Involvement (2)

26th International Congress on High-Speed Photography and Photonics

20 September 2004 | Alexandria, United States

25th International Congress on High-Speed Photography and Photonics

29 September 2002 | Beaune, France

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