Laser Integration Line target diagnostics first results (invited)

Journal Article · Sun Oct 15 00:00:00 EDT 2006 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.2349746· OSTI ID:20861391

Le Breton, J P; Alozy, E; Boutin, J Y; Duval, A; Gary, S; Gontier, D; Jasmin, S; Naudy, M; Reverdin, C; Rosch, R; Schmitt, S; Soullie, G; Stemmler, P; Villette, B; Wrobel, R; Hulin, S; Meyer, C; Romary, P ^[1]

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1. CEA/DIF, BP no 12, 91680 Bruyeres le Chatel (France)

The Laser Integration Line (LIL) is part of the Laser Megajoule (LMJ) project. The LMJ installation, which is of the National Ignition Facility (NIF) class, will deliver 1.8 MJ at 0.35 {mu}m wavelength on target with 60 quadruplets of elementary beams. The energy on target of LIL is 30 kJ corresponding to one quadruplet, it is housed in a separate building and has its own experimental setup. Target diagnostics have been progressively installed in the LIL target area. Energy and imaging diagnostics as well as the broadband and high resolution spectrometers have been fabricated in the frame of a unique industrial contract. Optical pointers are used to align the diagnostics to the target. The supervisory system controlling the diagnostics configuration and data acquisition is now able to manage cooperative and Commissariat a l' Energie Atomique (CEA) shots. The calibration data base is accessible from the processing network and will very soon include the characterization of all the streaked, gated, and charge coupled device cameras. Only the Raman-Brillouin backscatter spectrometer still requires some final work and operating tests. The first diagnostics results have been obtained at the end of 2004. A gated soft x-ray imager, the Diagnostic de Mesure X (DMX) broadband spectrometer and a pinhole static imager were used in demonstration experiments. The purpose of the first experiment was to observe the closing of a slit etched in a tantalum oxide foam when irradiated by x-rays. The next diagnostics to be activated were the high resolution spectrometers, the gated x-ray imager, the two mirror x-ray imagers, and the scattered energy diagnostic. This was done during the preparation phase of a campaign realized in collaboration with the French Lasers and Plasmas Institute at the end of 2005 in order to study heat conduction in inertial confinement fusion plasmas. The next diagnostic which is now in preparation is a velocity interferometer system for any reflector. This diagnostic is in its fabrication phase and will be operational for diamond equation of state experiments.

• OSTI ID: 20861391
• Journal Information: Review of Scientific Instruments, Vol. 77, Issue 10; Other Information: DOI: 10.1063/1.2349746; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BRILLOUIN EFFECT
CALIBRATION
CHARGE-COUPLED DEVICES
DATA ACQUISITION
DIAMONDS
INERTIAL CONFINEMENT
INTERFEROMETERS
LIGHT TRANSMISSION
PLASMA
PLASMA DIAGNOSTICS
RESOLUTION
SOFT X RADIATION
SPECTROMETERS
TANTALUM OXIDES
THERMAL CONDUCTION
ULTRAVIOLET RADIATION
US NATIONAL IGNITION FACILITY
X-RAY SPECTROSCOPY