Sunsensors for Satellites and Space Applications2021-06-20T13:30:04+01:00

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in space.
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2006, 2021

Reliability for Cubesats

On the 18th of June we finished thermal vacuum cycling of the BiSon Sunsensors that was agreed upon in frame of the running ESA GSTP program. At the VaB thermal cycling facility has 9 slots for mounting Sunsensors, and all Lens R&D Sunsensors have the same mounting interface, we decided to test a MAUS along with the BiSon Sunsensors. As the test temperatures were well above the specified -40° to +80°C operational range specified for the sensors, this experiment should be treated as an accelerated life test for the sensors. As far as we know, accelerated life testing is [...]

1004, 2021

Changing temperature beyond satellite speed.

A trio of Lens R&D Sunsensors is changing temperature under vacuum at a speed that surpasses that of a real satellite. The plot shows the temperature profiles achieved for the BiSon Sunsensors in frame of the ongoing ESA life testing qualification and the MAUS Cubesat Sunsensor. Contrary to common high speed cycling (which is generally performed under a nitrogen atmosphere) these tests are performed under vacuum. This is done in our dedicated Sunsensor thermal vacuum (TVAC) test facility. The  facility can hold up to 9 Sunsensors simultaneously and is controlled by a fluid loop controlled hotplate. Custom developed for Lens [...]

2103, 2021

Tested beyond levels required

Last week the new custom developed photodiodes that are used in the Lens R&D fine Sunsensors (BiSon and MAUS) have been tested at the Delft Reactor Institute (DRI) to levels beyond what would be required for any known mission. Given the high radiation levels to be tested for the devices it had become impractical to perform regular Co60 tests for Total Ionizing Dose (TID) and Proton tests for displacement damage (TNID). Following discussions with ESA on how to best test the diodes it was decided to use 1MeV electrons instead. These tests are also used for solarcells which means that [...]

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