2025.12.24

Karaki-san’s paper has been published in HEDP journal.

Karaki-san’s paper has been published in the journal High Energy Density Physics.
This paper reports an experiment showing that heating a plasma becomes much more efficient when a very clean (high-contrast) high-intensity laser pulse is shot at a specially shaped target that has a cone attached to a flat foil. The cone guides and focuses the laser energy toward its tip, so electrons in the target are heated to much higher temperatures (around ~9.9 keV) than when using a flat target or a lower-contrast laser. X-ray images and electron measurements indicate that the cone helps the laser light concentrate and transfer more energy into fast electrons and X-ray emission, which is important for improving energy coupling in fast-ignition inertial confinement fusion research.