12 research outputs found

    Lawson Criterion for Ignition Exceeded in an Inertial Fusion Experiment

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    Lawson criterion for ignition exceeded in an inertial fusion experiment

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    For more than half a century, researchers around the world have been engaged in attempts to achieve fusion ignition as a proof of principle of various fusion concepts. Following the Lawson criterion, an ignited plasma is one where the fusion heating power is high enough to overcome all the physical processes that cool the fusion plasma, creating a positive thermodynamic feedback loop with rapidly increasing temperature. In inertially confined fusion, ignition is a state where the fusion plasma can begin "burn propagation" into surrounding cold fuel, enabling the possibility of high energy gain. While "scientific breakeven" (i.e., unity target gain) has not yet been achieved (here target gain is 0.72, 1.37 MJ of fusion for 1.92 MJ of laser energy), this Letter reports the first controlled fusion experiment, using laser indirect drive, on the National Ignition Facility to produce capsule gain (here 5.8) and reach ignition by nine different formulations of the Lawson criterion

    L'anthropologie des Touareg du Sahara.

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    Cabot Briggs L. L'anthropologie des Touareg du Sahara.. In: Bulletins et Mémoires de la Société d'anthropologie de Paris, X° Série. Tome 6 fascicule 1-3, 1955. pp. 93-116

    Contribution Ă  l'anthropologie des Zenata du Sahara.

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    Cabot Briggs L. Contribution à l'anthropologie des Zenata du Sahara.. In: Bulletins et Mémoires de la Société d'anthropologie de Paris, X° Série. Tome 6 fascicule 4-5, 1955. pp. 214-222

    Achievement of Target Gain Larger than Unity in an Inertial Fusion Experiment

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    Lawson Criterion for Ignition Exceeded in an Inertial Fusion Experiment

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    Achievement of Target Gain Larger than Unity in an Inertial Fusion Experiment

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    Materials for the Study of African Military History

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