The LIL facility quadruplet commissioning

Di-Nicola, Jean-Michel; Fleurot, N.; Lonjaret, Thierry; Julien, Xavier; Bordenave, E.; Garrec, B. Le; Mangeant, M.; Béhar, G.; Chies, T.; Feral, Christophe; Graillot, H.; Luttmann, Michel; Jequier, F.; Journot, Eric; Lutz, O.; Thiell, G.

doi:10.1051/jp4:2006133119

Cited by 25 publications

(13 citation statements)

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“…The LIL focal spot has been carefully recorded during the commissioning campaign and details of the focal spot diagnostics can be found in [1,3]. The reference profile for the quad focal spot is taken from the 5 shot recording shown in figure 4.…”

Section: Lil Focal Spot Resultsmentioning

confidence: 99%

“…The purpose of LIL and of these experiments is to show that the previously untested features of the LMJ laser design will perform as projected at LMJ scale and that the laser is therefore ready for final engineering design. LIL Quad beam waist was recorded for various pulse durations, smoothing techniques and for a wide range of laser intensities up to LMJ-nominal ones [1]. Now, LIL quad has been commissioned to the center of the target chamber and the first plasma experiments are being made.…”

mentioning

confidence: 99%

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The design of LMJ focal spots for indirect drive experiments

Garrec¹,

Sajer²

2008

J. Phys.: Conf. Ser.

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Abstract. LMJ is a 240 high power laser beam facility for achieving laser matter interaction experiments, high energy density science, including the demonstration of fusion ignition through Inertial Confinement. The Laser Integration Line (LIL) facility is currently a 4-beam prototype for LMJ. The intensity I 0 at the focal spot centre drives hydrodynamic and plasma instabilities and the intensity in the wings must be low to go through the laser entrance Hohlraum. A simple model has been developed to compute the LMJ focal spot. The model gives the intensity at the centre as a function of the focal spot area at 3% of the maximum. IntroductionThe Laser Integration Line (LIL) facility is currently a 4-beam prototype for LMJ. The purpose of LIL and of these experiments is to show that the previously untested features of the LMJ laser design will perform as projected at LMJ scale and that the laser is therefore ready for final engineering design. LIL Quad beam waist was recorded for various pulse durations, smoothing techniques and for a wide range of laser intensities up to LMJ-nominal ones [1]. Now, LIL quad has been commissioned to the center of the target chamber and the first plasma experiments are being made.LMJ focal spot requirements are : elliptic shape, almost flat top high-order super-gaussian envelope, spot size, intensity at the center. In fact, it is important to know precisely the intensity I 0 at the focal spot center (to control hydrodynamic and plasma instabilities) and the intensity at the edges of the focal spot (to go through the laser entrance Hohlraum). For LMJ focal spots, it has been decided that this level will be 3 % of I 0 .

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Section: Lil Focal Spot Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

The design of LMJ focal spots for indirect drive experiments

Garrec¹,

Sajer²

2008

J. Phys.: Conf. Ser.

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“…The typical bandwidth of 17 nm (FWHM) allows compression of the pulse down to 0.5 ps pulse width. NIF has operated since 2009 and LMJ is being completed and both baselines have been demonstrated on the Beamlet single laser line [18] and LIL, the LMJ's four-beam-line prototype [19] .…”

Section: Laser Design: Architecturementioning

confidence: 99%

“…The last critical parameter for DPSSLs is the cost of laser diodes because only quasi-continuous mode operation (QCW) at low duty cycle (1%) is possible for this type of medium repetition rate (10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20). This excludes the possibility of using CW diodes for which the market is larger.…”

Section: Diode-pumped Solid-state Lasers (Dpssls)mentioning

confidence: 99%

Challenges of high power diode-pumped lasers for fusion energy

Garrec

2014

High Pow Laser Sci Eng

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This paper reviews the different challenges that are encountered in the delivery of high power lasers as drivers for fusion energy. We will focus on diode-pumped solid-state lasers and we will highlight some of the main recent achievements when using ytterbium, cryogenic cooling and ceramic gain media. Apart from some existing fusion facilities and some military applications of diode-pumped solid-state lasers, we will show that diode-pumped solid-state lasers are scalable to inertial fusion energy (IFE)'s facility level and that the all-fiber laser scheme is very promising.

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“…The Laser Integration Line (LIL) facility is the prototype of the MegaJoule Laser (LMJ) [1]. In the next few years, experimental campaigns that are planned on this facility will involve gas-filled targets, to evaluate, e.g., the laser light to X-rays conversion and smoothing performance, as ionized low-Z gas reduces hohlraum filling with high-Z plasma and enhances performance of laser deposition in the hohlraum wall [2].…”

Section: Introductionmentioning

confidence: 99%