Interfacing issues in microcooling of optical detectors in space applications

J.H. Derking, H.J.M. ter Brake, M. Linder, H. Rogalla

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

Abstract

Miniature Joule-Thomson coolers were developed at the University of Twente and are able to cool to 100 K with a typical cooling power of 10 to 20 mW. These coolers have a high potential for space applications in cooling small optical detectors for future earth observation and science missions. Under contract of the European Space Agency, we investigate on-chip detector cooling for the temperature range 70 K-250 K. To identify the detectors that can be cooled by a JT microcooler, a literature survey was performed. Following this survey, we selected a micro digital CMOS image sensor. A conceptual design of this cooler-sensor system is made. Among various techniques, indium soldering and silver paint are chosen for the bonding of the silicon sensor to the glass microcooler. Electrical connections from the sensor to the outside will be realized by structuring them in a thin layer of gold that is sputtered on the outside of the cooler to minimize the radiative heat load. For the electrical connections between the sensor and the structured leads, aluminum or gold bond wires will be used
Original languageEnglish
Title of host publicationTransactions of the Cryogenic Engineering Conference—CEC
Subtitle of host publicationAdvances in Cryogenic Engineering
EditorsJ.G. Weisend
PublisherAmerican Institute of Physics
Pages617-624
Number of pages8
ISBN (Print)978-0-7354-0761-9
DOIs
Publication statusPublished - 2010
Event2009 Cryogenic Engineering Conference and International Cryogenic Materials Conference, CEC-ICMC - Tucson, United States
Duration: 28 Jun 20092 Jul 2009

Publication series

NameAIP conference proceedings
PublisherAmerican Institute of Physics
Number1
Volume1218
ISSN (Print)0094-243X

Conference

Conference2009 Cryogenic Engineering Conference and International Cryogenic Materials Conference, CEC-ICMC
Abbreviated titleCEC-ICMC
CountryUnited States
CityTucson
Period28/06/092/07/09

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