Long-Pulse Laser-Plasma Interactions at 10to the 12th power -10to the 15th power W/sq. cm.

摘要

Laser-plasma interaction physics including absorption, plasma formation, heating, plasma expansion and energy transport, are examined for 3-nsec Nd-laser irradiances between 10 to the 12th and 10 to the 15th power W/sq.cm. Efficient energy deposition and conditions favorable to ablative acceleration are found at 10 to the 12th to 10 to the 13th power W/sq cm. whereas reduced absorption, hot electrons and fast ions are seen at 7 times 10 to the 14th power W/sq cm. Suitability of the observed physics to laser-pellet fusion is discussed. (Author)