Direct vs Indirect drive for fusion

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Hohlraums are beneficial in laser fusion as they provide a uniform radiation source at shorter wavelengths by absorbing and heating the laser pulse. However, they are destroyed after each pulse, which raises concerns about their practicality. Both laser fusion and magnetic confinement have proven to be challenging paths toward achieving controlled fusion. Current technologies in both methods remain significantly short of the energy output required for sustainable fusion. Despite substantial investments, progress in achieving controlled fusion continues to be slow and complex.
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What is so good about having a hohlraum, and is it destroyed after every pulse?
 
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It serves to provide a relatively uniform source of radiation at shorter wave lengths as it absorbs the laser pulse and heats up.
It is of course destroyed in the process.
The painful reality is that laser fusion has shown itself to be an equally thorny path to controlled fusion as magnetic confinement is. Either approach is still at least an order of magnitude or two short of what is needed, despite huge investments.
 

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