Thermal Design of a Protomodel Space Infrared Cryogenic System

Abstract

A Protomodel Space Infrared Cryogenic System (PSICS) cooled by a stirling cryocooler has been designed. The PSICS has an IR sensor inside the cold box which is cooled by a stirling cryocooler with refrigeration capacity of 500mW at 80K in a vacuum vessel. It is important to minimize the heat load so that the background thermal noise can be reduced. In order to design the cryogenic system with low heat load and to reduce the remained heat load, we have performed numerical analyses. In this paper, we present the design factors and the results obtained by the thermal analysis of the PSICS.

Keywords

• PACS 07.20.Mc low-temperature equipment
• PACS 07.87.+v space research instrument
• PACS 95.55.Fw infrared telescope