New skin depth plasma interaction by ps-TW laser pulses and consequences for fusion energy

Heinrich Hora; Hansheng Peng; Weiyan Zhang; Frederick Osman

doi:10.1117/12.481804

5 September 2002 New skin depth plasma interaction by ps-TW laser pulses and consequences for fusion energy

Heinrich Hora, Hansheng Peng, Weiyan Zhang, Frederick Osman

Proceedings Volume 4914, High-Power Lasers and Applications II; (2002) https://doi.org/10.1117/12.481804
Event: Photonics Asia, 2002, Shanghai, China

Abstract

A new type of MeV ion generation at laser-plasma interaction has been measured based on the observation [1] that ps neodymium glass laser pulses of about TW and higher power do not produce the relativistic self-focusing based very high ion energies but more than 50 times lower energies. On top the strange observation was reported [fl that the number of the emitted fast ions did not change at variation of the laser focus intensity by a factor 30. This can be explained by the effect that without an inadiating prepulse, a pui plane gcmetnc skin layer interaction mechathsm occurs [2]. Neither relativistic self-focusing is possible nor the process of thermalization of quiver energy by quantum modified collisions. Following our conclusions about the difficulties for the fast ignitor concept of laser fi.ision [3], we can explain how these mechanisms can be used for studying the self-sustained fusion combustion waves [4] as known from the spark ignition at laser fusion. We further expect an improvement of the conditions for the experiments [5]with the highest laser fusion gains ever reported where even no pre-compression of the ftision plasma was necessary.

Citation Download Citation

Heinrich Hora, Hansheng Peng, Weiyan Zhang, and Frederick Osman "New skin depth plasma interaction by ps-TW laser pulses and consequences for fusion energy", Proc. SPIE 4914, High-Power Lasers and Applications II, (5 September 2002); https://doi.org/10.1117/12.481804

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