Descripción
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Direct-drive implosions with 20-¿m-thick glass shells were conducted on the Omega Laser Facility to test the performance of high-Z glass ablators for direct-drive, inertial confinement fusion. The x-ray signal caused by hot electrons generated by two-plasmon-decay instability was reduced by more than ~40× and hot-electron temperature by ~2× in the glass compared to plastic ablators at ignition-relevant drive intensities of ~1×1015¿¿W/cm2, suggesting reduced target preheat. The measured absorption and compression were close to 1D predictions. The measured soft x-ray production in the spectral range of ~2 to 4 keV was ~2× to 3× lower than 1D predictions, indicating that the shell preheat caused by soft x-rays is less than predicted. A direct-drive-ignition design based on glass ablators is introduced. | |
Internacional
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Si |
JCR del ISI
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Si |
Título de la revista
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PHYSICAL REVIEW LETTERS |
ISSN
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0031-9007 |
Factor de impacto JCR
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7,328 |
Información de impacto
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Volumen
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104 |
DOI
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10.1103/PhysRevLett.104.165002 |
Número de revista
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16 |
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0 |
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4 |
Mes
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ABRIL |
Ranking
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