Methodology for the optimization of detection systems of Plasma corpuscular radiation, working under intensive conditions of n-g background radiation

TL;DR

This paper describes a methodology for developing low-background, high-efficiency scintillation detectors for plasma diagnostics, successfully implemented in major tokamak analyzers to improve detection under intense radiation conditions.

Contribution

The paper introduces a novel detector design using thin CsI(Tl) scintillators on quartz supports, enhancing sensitivity and reducing background interference in plasma detection systems.

Findings

Detectors achieved near 100% efficiency in plasma diagnostics.

Successfully operated in JET tokamak for many years.

Reduced background sensitivity in high-radiation environments.

Abstract

This Thesis present the process of development very low sensitivity to background radiation n-g scintillation detectors with close to 100% efficiency to corpuscular diagnostic of thermonuclear plasma. The detectors developed using this methodology were installed in two major Neutral Particle Analyzers for the JET tokamak (Gemma-2M and ISEP) and they operated successfully for many years. The configuration for such detectors is based on the growing of very thin scintillators of CsI(Tl) on top of quartz supporters and then glued to photomultipliers by keeping the thickness of the supporter and the entrance window of the photocamera of the photomultiplier very thin low sensitivity to background radiation can be achieved.