Collective Thomson scattering diagnostic for the GDT experiment

TL;DR

This paper proposes a collective Thomson scattering diagnostic using a 54.5 GHz gyrotron to measure fast ion distributions in the GDT plasma, demonstrating feasibility for core plasma diagnostics.

Contribution

It introduces a novel diagnostic approach utilizing existing gyrotron technology for fast ion measurement in the GDT experiment.

Findings

Feasibility of using 54.5 GHz gyrotron for ion diagnostics.

Potential to reconstruct ion velocity distributions.

Application to plasma core in GDT experiment.

Abstract

In this paper, we propose a collective Thomson scattering diagnostic for fast ion measurements for the gas-dynamic trap (GDT) facility at the Budker Institute. The diagnostic utilizes 54.5 GHz gyrotron usually used for electron cyclotron resonance heating as a source of probe radiation and is aimed at reconstruction of distributions over transverse and longitudinal velocities of NBI-driven ions in the plasma core. Here we present a feasibility study of this concept.