High-Temp Electronics For Venus Exploration, recent advances |
High-Temp Electronics For Venus Exploration, recent advances |
Mar 13 2013, 03:36 PM
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Member Group: Members Posts: 127 Joined: 20-April 05 Member No.: 291 |
(MOD NOTE: Started a new topic for this discussion to continue. Please remember the 'no sci-fi engineering' provision of rule 1.9. Have fun!)
Also, since I'm thinking about surface operations on Venus, the state-of-the-art in high temperature electronics has advanced quite far in the past decade. Its now possible to buy off the shelf chips from vendors designed to operate at the 250-300 C range. Meanwhile basic functionality has been tested at and beyond the temperatures needed for long-term surface operations on Venus: http://www.grc.nasa.gov/WWW/SiC/ http://www.gizmag.com/extreme-silicon-carb...ctronics/16410/ http://www.grc.nasa.gov/WWW/SiC/publicatio...Contact2010.pdf Another decade or so and a long-term Venus lander could be possible with (practically) off the shelf electronics! |
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May 11 2015, 08:16 PM
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Member Group: Members Posts: 127 Joined: 20-April 05 Member No.: 291 |
A few items of interest:
Another new 250C tested commercial capacitor (from the graphs, might be able to perform briefly above 250). Also shock tested to 500G. The press release contains a nice guide to the commercial state of the art for downhole high-temp/high-pressure rated electronics. This caught my eye as useful to know: The UK Energy Institute’s Model Code Of Safe Practice originally standardized a definition for High-Pressure/High-Temperature (HPHT) wells, as having undisturbed bottom-well temperatures above 149°C and needing pressure-control equipment with a rated working pressure of over 69MPa (10,000 psi). These limits are no longer adequate to distinguish today’s most extreme wells, and new definitions are emerging. Although yet to become widely standardised, the ultra High-Pressure/High-Temperature (uHPHT) category now covers temperatures from 204°C to 260°C and pressure from 139MPa to 241MPa, while extremely High-Pressure/High-Temperature (xHPHT) refers to temperatures above 260°C and pressures above 241MPa. So guess xHPHT is the new google search term to enter in if you're looking for commercial Venusian survivable equipment Entering it into google shows a small, but growing list, of xHPHT research and products - this one caught my eye: 260 C rated transducer, and a 275 C rated application-specific integrated circuit It reports that the new ASIC has survived over 1,000 hours testing at 275°C. Gotta wonder at what point COTS high-temp equipment doesn't require a nuclear reactor to cool anymore for a viable Venusian lander. More information on their high temperature IC development here Not specifically high temperature, but An overview of the current state of Thin Film Resistors - which I mentioned earlier this year as a future technology with high temperature thresholds. |
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