Overview of LMJ alignment to target chamber center and very first results

Luttmann, Michel; Denis, Vincent; Gendeau, Patrick; Lanternier, Catherine; Baudon, P; Schiano, Yannick; Espert, L; Seguineau, F.; Henry, Olivier; Raffestin, D.; Compain, Eric; Delage, Laurent; Lecot, C; Chapron, N

doi:10.1088/1742-6596/717/1/012106

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…This system is demonstrated that each quad beam alignment performance is 50 µm (RMS) and it can also align the target within 15 µm (RMS). 2,3,13,14 The laboratory has built an excimer XeCl laser device with the wavelength of 308 nm. Compared with other high-power laser devices in the world, this device has the characteristics of partially coherent laser and good laser spot uniformity on the target surface, and can be applied in basic researches like the raidation transport of laser-induced plasma in gas environment.…”

Section: Introductionmentioning

confidence: 99%

A target positioning and laser beam pointing system used for laser-induced plasma experiments

Wang

Xue

Zhao

et al. 2022

Sixth International Symposium on Laser Interaction With Matter

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In the high-power laser device, through precisely positioning the target and pointing multiple laser beams at a very small area on the target surface, the laser power density coupled with the target can be greatly improved and is conducive to the research of laser-induced plasma experiments. This paper proposes a set of target positioning and laser beam pointing system, which has advantages of high experiment efficiency, high target positioning and laser pointing accuracy. This system can automatically correct the attitude and position of targets, and make all laser converge together by adjusting their incident directions. It was verified that the target positioning error is 14.83 µm and the beam guidance accuracy is 9.70 µm.

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Section: Introductionmentioning

confidence: 99%

A target positioning and laser beam pointing system used for laser-induced plasma experiments

Wang

Xue

Zhao

et al. 2022

Sixth International Symposium on Laser Interaction With Matter

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A scheme and kinematics analysis of an assembly vehicle for terminal optical component of a laser fusion device

Fan

Xue

Wang

et al. 2021

2021 4th World Conference on Mechanical Engineering and Intelligent Manufacturing (WCMEIM)

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Laser Megajoule performance status

Neauport,

Airiau,

Beck

et al. 2024

Appl. Opt.

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The Laser Megajoule (LMJ) is among the most energetic inertial confinement fusion laser facilities in the world, together with the National Ignition Facility (NIF) in the USA. The construction of the facility began back in 2003, and the first photons were emitted by the laser bundle #28 in 2014. Today, 11 laser bundles consisting of 88 large aperture 0.35×0.35m2 laser beams are in operation, delivering daily up to 330 kJ of energy at the wavelength of 351 nm on a target placed in the center of a 10 m diameter vacuum chamber. In this paper, we describe the laser system and its operational performances. We also detail the first laser campaigns carried out to prepare an increase of energy and power on the target. These campaigns, along with the completion of additional bundles mounting, will bring LMJ performance to 1.3 MJ thanks to 22 bundles in operation.

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Overview of LMJ alignment to target chamber center and very first results

Cited by 3 publications

References 4 publications

A target positioning and laser beam pointing system used for laser-induced plasma experiments

A target positioning and laser beam pointing system used for laser-induced plasma experiments

A scheme and kinematics analysis of an assembly vehicle for terminal optical component of a laser fusion device

Laser Megajoule performance status

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