A fast acquisition rate system for charge exchange measurements at the plasma edge at the ASDEX Upgrade tokamak

TL;DR

This paper presents a newly developed high-throughput spectrometer system enabling rapid, multi-channel charge exchange measurements at the plasma edge of the ASDEX Upgrade tokamak, enhancing diagnostic capabilities.

Contribution

The work introduces a novel high-speed Czerny-Turner spectrometer with multi-channel acquisition and 10 microsecond repetition time, integrated into the ASDEX Upgrade edge system.

Findings

Successful implementation of the spectrometer at ASDEX Upgrade

Initial measurements demonstrate high temporal resolution

Calibration methods ensure measurement accuracy

Abstract

In this work, a new type of high through-put Czerny-Turner spectrometer has been developed which allows to acquire multiple channels simultaneously with a repetition time on the order of \SI{10}{\us} at different wavelengths. The spectrometer has been coupled to the edge charge exchange recombination system at ASDEX Upgrade which has been recently refurbished with new lines of sight. Construction features, calibration methods, and initial measurements obtained with the new setup will be presented.