The 4K focal plane unit for SPICA's SAFARI far infrared instrument

Josefina Torres Redondo, Martin Eggens, Rafael García Lopez, Isabel Pérez Grande, Javier Pérez-Alvarez, Marcos Chimeno, David Arrazola Perez, Marianela Fernández, Tomas Belenguer Davila, Luis González Fernandez, Jaap Evers, Pieter Dieleman, Willem Jellema, Peter Roelfsema, Jesús Martin Pintado, Francisco Najarro

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


SPICA provided the next step in mid- and far-infrared astronomical research and was a candidate of ESA's fifth medium class Cosmic Vision mission. SAFARI is one of the spectroscopic instruments on board SPICA. The Focal Plane Unit (FPU) design and analysis represent a challenge both from the mechanical and thermal point of view, as the instrument is working at cryogenic temperatures between 4.8K and 0.05K. Being a large instrument, with a current best estimate of 148,7kg of mass, its design will have to be optimized to fit within the missiońs mass and volume budget. The FPU will also have to be designed for its modularity and accessibility due to the large number of subsystems that SAFARI had to accommodate, highlighting Fourier Transform Spectrometer Mechanism (FTSM) and the three grating-based point source spectrometer modules (GM) which operates at 1.7K in the FPU, the latter representing 60% of the total mass of the instrument
Original languageEnglish
Title of host publication Optical, Infrared, and Millimeter Wave
Subtitle of host publicationProceedings Volume 11443, Space Telescopes and Instrumentation 2020
PublisherSPIE.Digital Library
Publication statusPublished - 1-Dec-2020
EventSPIE Astronomical Telescopes + Instrumentation, 2020 - online
Duration: 13-Dec-202018-Dec-2020

Publication series

NameProceedings of the SPIE
ISSN (Print)0361-0748


ConferenceSPIE Astronomical Telescopes + Instrumentation, 2020

Cite this