39 research outputs found
ILIAS Ion and Laser beam Interaction and Application Studies : A scientific portrait of the PHELIX theory group
Energy loss measurements of heavy ions in dense weakly coupled plasma generated by volumetric heating with hohlraum generated x-rays
Interaction of heavy ions with warm dense plasma using hohlraum targets(combined experiment with PHELIX and UNILAC)
Comparison of measured time resolved hohlraum radiation temperature with data produced by RALEF II-Code
Experimental discrimination of ion stopping models near the Bragg peak in highly ionized matter
The energy deposition of ions in dense plasmas is a key process in inertial confinement fusion that determines the α-particle heating expected to trigger a burn wave in the hydrogen pellet and resulting in high thermonuclear gain. However, measurements of ion stopping in plasmas are scarce and mostly restricted to high ion velocities where theory agrees with the data. Here, we report experimental data at low projectile velocities near the Bragg peak, where the stopping force reaches its maximum. This parameter range features the largest theoretical uncertainties and conclusive data are missing until today. The precision of our measurements, combined with a reliable knowledge of the plasma parameters, allows to disprove several standard models for the stopping power for beam velocities typically encountered in inertial fusion. On the other hand, our data support theories that include a detailed treatment of strong ion-electron collisions