Experimental study on magnetically insulated inertial confinement plasmas at 10.6 micron laser wavelength.

We present properties of the magnetically insulated inertial confinement plasmas at 10.6 micron laser wavelength. The temperature measurement for parylene shell targets based on the x-ray spectroscopic method gives the electron temperature of more than 500 eV at the center of the 1 mm-diam-target. An enhanced confinement time is obtained in a thick gold shell (100micron thick) target coated internally with parylene. The duration of the x-ray emitted from the hot core in a 3mm-diam-target of this type is 34 ns, while the laser pulse duration is 1 ns. The observed parabolic dependence of the x-ray duration on the target diameter indicates evidence of a strong magnetic thermal insulation of the hot core plasma.