PROTON STOPPING POWER OF DIFFERENT DENSITY PROFILE PLASMAS

Proton stopping in plasmas considering e –e collisions

The purpose of the present paper is to describe the effects of electron-electron collisions on proton electronic stopping in plasmas of any degeneracy. Plasma targets are considered fully ionized so electronic stopping is only due to the free electrons. The stopping due to free electrons is obtained from an exact quantum mechanical evaluation in the random phase approximation, which takes into ...

Stopping power for deuterons in partially ionized Al plasmas

Local field corrections vs. Mermin dielectric function on proton stopping in plasmas

The energy loss of charged particles in a free electron gas is of considerable interest to actual slowing-down problems. This is a topic of relevance to understand the beam-target interaction in the contexts of particle driven fusion. The energy losses of ions moving in an electron gas can be studied through the stopping power of the medium. Large number of calculations of the stopping power of...

Density profile behavior in JET H-mode plasmas

The degree of peaking of the density profile has profound implications for reactor operation. As an independent complement to previous studies, density peaking in the JET tokamak was investigated on the most recent dataset, comprising virtually all experiments performed in 2006 and 2007. Unlike previous studies, this work focuses on low collisionality data as most representative of reactor cond...

Patient-specific stopping power calibration for proton therapy planning based on single-detector proton radiography.

A simple robust optimizer has been developed that can produce patient-specific calibration curves to convert x-ray computed tomography (CT) numbers to relative stopping powers (HU-RSPs) for proton therapy treatment planning. The difference between a digitally reconstructed radiograph water-equivalent path length (DRRWEPL) map through the x-ray CT dataset and a proton radiograph (set as the grou...