Development of wide-field low-energy X-ray imaging detectors for HiZ-GUNDAM

TL;DR

This paper discusses the development of a prototype wide-field low-energy X-ray detector for the HiZ-GUNDAM mission, aiming to observe high-redshift gamma-ray bursts and focusing on detector performance and radiation tolerance.

Contribution

It introduces a novel prototype system with a high gain analog ASIC designed for low-energy X-ray detection in space applications.

Findings

The prototype demonstrates effective detection in the 1-20 keV range.

The ASIC shows high radiation tolerance suitable for space environment.

Performance metrics meet the requirements for high-z GRB observations.

Abstract

We are planning a future gamma-ray burst (GRB) mission HiZ-GUNDAM to probe the early universe beyond the redshift of z > 7. Now we are developing a small prototype model of wide-field low-energy X-ray imaging detectors to observe high-z GRBs, which cover the energy range of 1 - 20 keV. In this paper, we report overview of its prototype system and performance, especially focusing on the characteristics and radiation tolerance of high gain analog ASIC specifically designed to read out small charge signals.