Integration of a $^6$LiInSe$_2$ Thermal Neutron Detector into a CubeSat Instrument

TL;DR

This paper introduces a compact, low-power neutron detector using a novel $^6$LiInSe$_2$ crystal integrated into a CubeSat, demonstrating its design, initial testing, and feasibility for space applications.

Contribution

It presents the first use of $^6$LiInSe$_2$ crystal in a CubeSat neutron detector, showcasing a lightweight, efficient design suitable for space-based neutron detection.

Findings

Successful initial testing with alpha radiation

Compact design meets size and power constraints

Feasibility demonstrated for space deployment

Abstract

We present a preliminary design for a novel neutron detection system that is compact, lightweight, and low power consuming, utilizing the CubeSat platform making it suitable for space-based applications. This is made possible using the scintillating crystal lithium indium diselenide ($^6$LiInSe$_2$), the first crystal to include $^6$Li in the crystalline structure, and a silicon avalanche photodiode (Si-APD). The schematics of this instrument are presented as well as the response of the instrument to initial testing under alpha radiation. A principal aim of this work is to demonstrate the feasibility of such a neutron detection system within a CubeSat platform. The entire end-to-end system presented here is 10 cm x 10 cm x 15 cm, weighs 670 grams and requires 5 Volts direct current at 3 Watts.