The Conceptual Design and Analysis of the Cryogenic Test Rig for the ARIEL Payload Module

Date

2020-07-31

Journal Title

Journal ISSN

Volume Title

Publisher

2020 International Conference on Environmental Systems

Abstract

The Atmospheric Remote-Sensing Infrared Exoplanet Large-survey (ARIEL) was selected in March 2018 by ESA as the fourth medium-class mission (M4) in ESA’s Cosmic Vision Programme, due to launch in 2028. During a mission lifetime of 4 years on its orbit around the L2 Lagrange point, ARIEL will explore the chemistry of 1000 exoplanets through precise spectroscopy. The payload for the ARIEL mission is developed by a UK led consortium with participation from 14 ESA member states. RAL Space, part of the UK Science and Technology Facilities Council (STFC), has the main responsibility of the management and coordination of the activities of the ARIEL payload consortium. Another part of STFC, the Cryogenics Group is developing a flight cryocooler for active cooling of the instrument detectors to satisfy these components’ strict temperature requirements. In addition, RAL Space is responsible for the design and manufacture of a cryogenic test rig for the ground testing activities of the ARIEL payload. During its operation in the orbit, the payload will be shaded from the Sun by V-Groove shields mounted to the spacecraft bus and it will have a constant view of deep space. In order to simulate these conditions as much as possible, a target temperature of 20 K is chosen for the shroud panels of the test rig. The design activities are focused on delivering this temperature level while taking into account constraints such as uniformity and cool-down time, with a trade-off performed in order to select the most appropriate method of cooling. The design of the cryogenic test rig is at a conceptual stage and this paper includes the description of the thermal design and analysis activities performed so far.

Description

Ediz Tunarli, Science and Technology Facilities Council, Rutherford Appleton Laboratory, GB
Samuel Tustain, Science and Technology Facilities Council, Rutherford Appleton Laboratory, GB
ICES108: Thermal Control of Cryogenic Instruments and Optical Systems
The proceedings for the 2020 International Conference on Environmental Systems were published from July 31, 2020. The technical papers were not presented in person due to the inability to hold the event as scheduled in Lisbon, Portugal because of the COVID-19 global pandemic.

Keywords

The Atmospheric Remote-Sensing Infrared Exoplanet Large-survey (ARIEL), Cryogenics, Testing, Rutherford Appleton Laboratory (RAL) space

Citation