High-Temp Electronics For Venus Exploration, recent advances |
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High-Temp Electronics For Venus Exploration, recent advances |
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#91
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![]() Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 ![]() |
The topic is a bit timely, with Mars Insight launching soon: a low-bandwidth lander with a conventional camera, conventional laser spectrometer, and conventional mass spectrometer plus high-temperature electronics supporting a seismometer could be a heck of a mission. The first three instruments would work for an hour and give us observations upon arrival, while the seismometer would work for months, at least. I suspect that Venus has enough quakes that a few months would be very informative. It'd be really nice to drop two of these at different latitudes of the same longitude and locate the epicenter of the quakes.
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#92
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 ![]() |
In order to investigate possible ongoing volcanism, I'd presume, that one would be interested in longer-lasting atmospheric spectrometry.
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#93
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![]() Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 ![]() |
Long-term monitoring of atmospheric composition would certainly be interesting and perhaps the instrument and its logic could be done with high temperature electronics. It's an open question as to how long an interval would be likely to detect changes, which has been done from orbit, revealing roughly one spike in SO2 per decade. Perhaps smaller spikes are more frequent.
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#94
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![]() Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 2530 Joined: 20-April 05 Member No.: 321 ![]() |
Over two years old now, a proposed Venus surface mission that would use high-temp electronics for long-term monitoring of seismic activity and atmospheric changes.
The upshot is, something like Viking and Insight for Venus, with a surface mission of 120 days for one or two landers. Note that the slow rotation of Venus constrains the choice of landing sites whether or not the landers accompany an orbiter that could perform data relay. https://www.lpi.usra.edu/vexag/reports/SAEVe-6-25-2018.pdf |
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#95
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![]() Merciless Robot ![]() ![]() ![]() ![]() Group: Admin Posts: 8785 Joined: 8-December 05 From: Los Angeles Member No.: 602 ![]() |
This general topic seems to be...heating up (yeah, sorry
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#96
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Member ![]() ![]() ![]() Group: Members Posts: 544 Joined: 17-November 05 From: Oklahoma Member No.: 557 ![]() |
Some recent promising developments in high temperature electronics.
Applied Physics Letters free article on SiC and GaN QUOTE Recent years have witnessed the emergence of many exciting applications of high temperature (HT) electronics, including those related to Venus exploration, hypersonic flight, jet engines, automotive vehicles, chemical plants, and geothermal energy. These applications all require electronics capable of operating beyond the 250 °C temperature limit of standard silicon and silicon-on-insulator (SOI) technology. The low intrinsic carrier concentration of wide-bandgap semiconductors such as silicon carbide (SiC) and gallium nitride (GaN) at these high temperatures (>250 °C) makes these semiconductors ideal for these applications. GaN-based electronics is especially promising over SiC due to its higher mobility, larger critical electric field, and larger bandgap
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#97
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Senior Member ![]() ![]() ![]() ![]() Group: Members Posts: 1590 Joined: 14-October 05 From: Vermont Member No.: 530 ![]() |
SiC is up to 200mm wafers:
https://www.wolfspeed.com/company/about/mohawk-valley-fab/ |
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