Mr. Jan Doornink Profile

Jan Doornink

Thermal Engineer at Dutch Space BV

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Publications (4)

Proceedings Article | 20 November 2017 Open Access

The visible, near-infrared and short wave infrared channels of the EarthCARE multi-spectral imager

J. Doornink, B. de Goeij, O. Marinescu, E. Meijer, R. Vink, W. van Werkhoven, A. van ‘t Hof

Proceedings Volume 10565, 105651U (2017) https://doi.org/10.1117/12.2309153

KEYWORDS: Sensors, Calibration, Near infrared, Short wave infrared radiation, Infrared imaging, Infrared radiation, Imaging systems, Multispectral imaging, Channel projecting optics, Cameras

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Proceedings Article | 17 November 2017 Open Access

The Tropomi instrument: last steps towards final integration and testing

J. Doornink, J. de Vries, R. Voors, J. Dingjan, B. Ording, N. van der Valk, R. Vink, R. Hoogeveen, J. Grant, T. Canas, Q. Kleipool, P. Veefkind

Proceedings Volume 10563, 1056342 (2017) https://doi.org/10.1117/12.2304148

KEYWORDS: Sensors, Short wave infrared radiation, Spectroscopy, Space telescopes, Telescopes, Astronomical imaging, Calibration, Electronics, Near infrared, Space operations

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Proceedings Article | 24 September 2012 Paper

Sorption-based vibration-free cooler for the METIS instrument on E-ELT

H. J. M. ter Brake, Y. Wu, D. R. Zalewski, C. H. Vermeer, H. J. Holland, J. Doornink, B. Benthem, E. Boom

Proceedings Volume 8446, 84467O (2012) https://doi.org/10.1117/12.927002

KEYWORDS: Helium, Sensors, Carbon, Hydrogen, Cryogenics, Neon, Actuators, Adsorption, Cooling systems, Mid-IR

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Proceedings Article | 17 October 2007 Paper

Sorption cooling: a valid extension to passive cooling

Jan Doornink, Johannes Burger, Marcel ter Brake

Proceedings Volume 6744, 67441E (2007) https://doi.org/10.1117/12.769218

KEYWORDS: Space operations, Hydrogen, Helium, Carbon, Sun, Reflectors, Temperature metrology, Electromagnetic interference, Reliability, Actuators

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Passive cooling has shown to be a very dependable cryogenic cooling method for space missions. Several missions employ passive radiators to cool down their delicate sensor systems for many years, without consuming power, without exporting vibrations or producing electromagnetic interference. So for a number of applications, passive cooling is a good choice. At lower temperatures, the passive coolers run into limitations that prohibit accommodation on a spacecraft. The approach to this issue has been to find a technology able to supplement passive cooling for lower temperatures, which maintains as much as possible of the advantages of passive coolers. Sorption cooling employs a closed cycle Joule-Thomson expansion process to achieve the cooling effect. Sorption cells perform the compression phase in this cycle. At a low temperature and pressure, these cells adsorb the working fluid. At a higher temperature they desorb the fluid and thus produce a high-pressure flow to the restriction in the cold stage. The sorption process selected for this application is of the physical type, which is completely reversible. It does not suffer from degradation as is the case with chemical sorption of e.g. hydrogen in metal hydrides. Sorption coolers include no moving parts except for some check valves, they export neither mechanical vibrations nor electromagnetic interference, and are potentially very dependable due to their simplicity. The required cooling temperature determines the type of working fluid to be applied. Sorption coolers can be used in conjunction with passive cooling for heat rejection at different levels. This paper starts with a brief discussion on applications of passive coolers in different types of orbits and the limitations on passive cooling at low cooling temperatures. Next, the working principle of sorption cooling is summarized. The DARWIN mission is chosen as an example application of sorption and passive cooling and special attention is paid to the reduction of the radiator area needed by the sorption cooler. By examining the performance of alternative working fluids suitable for different cooling temperatures, the application field of this type of sorption cooling is currently expanded.

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