Low-velocity proton stopping power measurement in Warm Dense MatterONLINE ONLY

Understanding the physics of ion stopping power in warm dense matter (WDM) at low projectile velocity is of great interest both for fundamental science and inertial confinement fusion. This regime where vp (ion velocity) ~ vth (electron thermal velocity) is theoretically and experimentally challenging. We report a first measurement of the energy loss of 500 keV protons in WDM at a low ratio vp / vth = 3.  A novel platform for proton stopping power measurements by laser driven ion sources was developed for the experiment at the 30 fs 200 TW system CLPU - VEGA II (Spain).  A low energy proton beam with small bandwidth < 50 keV and time spread of 300 ps probed WDM with Te =10−20 eV, generated via fs laser heating of a thin carbon foil. X-ray spectroscopy and SOP provided the characterization of target temperature, which is used to benchmark 2D hydrodynamic and atomic simulations. The measured proton energy loss in WDM was compared to the theoretical modelling with various classical stopping power models and TD-OF-DFT. 

Zoom-Meeting
https://gsi-fair.zoom.us/j/96629963798

Meeting-ID: 966 2996 3798
Kenncode: 130302
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