飞秒激光固体靶相互作用中超热电子的输运特性

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Characteristic of hot electron transport in femtosecond laser interaction with solid targets

1.
Teaching and Research Section of Physics,Chengdu Medical College,Chengdu 610083,China;
2.
Research Center of Laser Fusion,CAEP,P.O.Box 919-986,Mianyang 621900,China;
3.
Atomic and Molecular Physics Institute,Sichuan University,Chengdu 610065,China

摘要: 实验研究了在100 TW掺钛宝石超短超强脉冲激光装置上完成的飞秒激光-固体靶相互作用中超热电子的输运特性，获得了超热电子的能谱、产额、注量及超热电子在靶内输运能量沉积范围。测量结果表明:超热电子的注量和总能量随靶厚度的增加而减少，超热电子约80％的能量主要沉积在靶内的前约一个激光脉冲宽度的范围内，且能量沉积范围随激光脉冲宽度的增加而增加，这主要是静电场的影响所致。
- 飞秒激光 /
- 超热电子 /
- 输运特性 /
- 能量沉积 /
- 静电场
Abstract: Hot electron spectrum in the interaction of femtosecond laser with solid target was measured by experiment on the 100 TW laser. The energy spectrum, yield, fluence and energy deposit range of hot electron transport in target were obtained. It is shown that the fluence and total energy of hot electrons decreases with the increase of target thickness, 80％ hot electrons energy deposits in the place infront of the target about pulse width of femtosecond laser, and energy deposit range of hot electrons increases with the increase of pulse width of femtosecond laser, which is induced by the static electric field effect.
- femtosecond laser /
- hot electron /
- transport characteristic /
- energy deposit /
- static electric field

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