NASA demonstrates electronics for longer Venus surface missions

February 10, 2017
Integrated circuit before (above) and after (below) testing in Venus atmospheric conditions. Credit: NASA

A team of scientists at NASA's Glenn Research Center in Cleveland recently completed a technology demonstration that could enable new scientific missions to the surface of Venus. The team demonstrated the first prolonged operation of electronics in the harsh conditions found on Venus.

"With further technology development, such electronics could drastically improve Venus lander designs and mission concepts, enabling the first long-duration missions to the surface of Venus," said Phil Neudeck, lead electronics engineer for this work.

Current Venus landers can only operate on the planet's surface for a few hours due to the extreme atmospheric conditions. The surface temperature on Venus is nearly 860 degrees Fahrenheit, which is hotter than most ovens, and the planet has a high-pressure carbon dioxide atmosphere. Because commercial electronics don't work in this environment, the electronics on past Venus landers have been protected by thermal and pressure-resistant vessels. These vessels only last a few hours, and they add substantial mass and expense to a mission.

To overcome these challenges, the Glenn team developed and implemented extremely durable semiconductor integrated circuits. They then electrically tested two of these integrated circuits in the Glenn Extreme Environments Rig (GEER), which can precisely simulate the conditions expected on Venus' surface. The circuits withstood the Venus surface temperature and atmospheric conditions for 521 hours – operating more than 100 times longer than previously demonstrated Venus mission electronics.

Credit: NASA

"We demonstrated vastly longer electrical operation with chips directly exposed—no cooling and no protective chip packaging—to a high-fidelity physical and chemical reproduction of Venus' surface atmosphere," Neudeck said. "And both integrated circuits still worked after the end of the test."

Earlier this year, the team demonstrated nearly identical silicon carbide integrated circuits for more than 1,000 hours at 900 degrees Fahrenheit in Earth-atmosphere oven testing. The were originally designed to operate in hot regions of fuel-efficient aircraft engines.

"This work not only enables the potential for new science in extended Venus surface and other planetary exploration, but it also has potentially significant impact for a range of Earth relevant applications, such as in aircraft engines to enable new capabilities, improve operations, and reduce emissions," said Gary Hunter, principle investigator for Venus surface development.

Results of the test are detailed in a peer-reviewed journal article titled "Prolonged silicon carbide integrated circuit operation in Venus ," which was published in AIP Advances.

Explore further: What is the weather like on Venus?

More information: Philip G. Neudeck et al. Prolonged silicon carbide integrated circuit operation in Venus surfaceatmospheric conditions, AIP Advances (2016). DOI: 10.1063/1.4973429

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5 comments

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Mark Thomas
4.6 / 5 (9) Feb 11, 2017
Can't wait to see this put to good use on Venus!
gkam
3 / 5 (8) Feb 11, 2017
No soldering.
Chris_Reeve
1.8 / 5 (5) Feb 11, 2017
We had enough reason to revisit Venus without waiting for this technology, in light of the fact that both the American Venus Pioneer and Russian Vega landers all returned back results that Venus' heat was not due to a runaway greenhouse effect ...

_Pioneering Venus: A Planet Unveiled_ at http://www.amazon...9RXS7S8/

"One main objective of the Multiprobe mission was to test the belief that the 'runaway greenhouse effect' caused the high surface temperature."

(H. E. Revercomb, L. A. Sromovsky, and V. E. Suomi, "Net Thermal Radiation in the Atmosphere of Venus," _Icarus_ 61, p521-538 (1985))

"The magnitudes of the *corrections* for both instruments are determined by *forcing agreement* with a range of *calculated net fluxes* at one altitude deep in the atmosphere, where the net flux *must be* small because of the large density of co2."
nrauhauser
not rated yet Feb 12, 2017
"nearly 860 degrees Fahrenheit, which is hotter than most ovens"

That's twice as hot as the oven I just put my cookie sheet of steak fries into ... reads a bit odd. Other than that, excellent article, would be nice to see a twenty day rover mission on Venus, should be easier to get down safely, too. One of the reasons we get schooled so hard by Mars is the thin atmosphere - no aerobraking possible.
gkam
1 / 5 (5) Feb 12, 2017
Aerobraking in the winds of Venus will be exciting:

http://www.univer...n-venus/

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