Laser heating of large noble gas clusters: from the resonant to the relativistic interaction regimes

Details Laser heating of large noble gas clusters: from the resonant to the relativistic interaction regimes Laser heating of large noble gas clusters: from the resonant to the relativistic interaction regimes

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008njph...10l3011g&link_type=abstract

New Journal of Physics, Volume 10, Issue 12, pp. 123011 (2008).

Physics

5

Scientific paper

Wide-ranging measurements of sub-picosecond laser interactions with large noble gas cluster targets have been conducted in order to help clarify the nature and extent of the underlying laser plasma heating. Within the sub-relativistic vacuum irradiance range of 1016 1017 W cm-2, we find that electron temperatures measured with continuum x-ray spectroscopy exhibit a pronounced multi-keV enhancement. Analysis indicates this behaviour to be consistent with collisional or collisionless resonant heating mechanisms. We also present the first measurements of laser-to-cluster energy deposition at relativistic vacuum irradiances, our data demonstrating absorption fractions of 90% or more. Optical probing was used to resolve the onset of a supersonic ionization front resulting from this very high absorption, and shows that despite significant pre-focus heating, the greatest plasma energy densities can be generated about the vacuum focus position. Electron energy spectra measurements confirm that laser plasma super-heating occurs, and together with ion data establish that relativistic laser plasma coupling in atomic clusters can take place without significant MeV particle beam production. In conjunction with optical self-emission data, the optical probing also indicates laser pre-pulse effects at peak vacuum irradiance of 5 × 1019 W cm-2. Laser absorption, plasma heating and energy transport data are supported throughout with analytical and numerical modelling.
© British Crown Copyright 2008/MOD

Affiliated with

Also associated with

No associations

Rating

Laser heating of large noble gas clusters: from the resonant to the relativistic interaction regimes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Laser heating of large noble gas clusters: from the resonant to the relativistic interaction regimes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser heating of large noble gas clusters: from the resonant to the relativistic interaction regimes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-794388