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A consumer chip is a lot more likely to be permanently damaged by a "silver bullet" cosmic ray, though. Rad-hard chips don't just have shielding, they can also
by ericbarrett 6y ago
A consumer chip is a lot more likely to be permanently damaged by a "silver bullet" cosmic ray, though. Rad-hard chips don't just have shielding, they can also have redundant circuits and modifications to the foundry process. That said, I'm sure Ingenuity's processor is fit to purpose.
- alexvoda 6y agoIt's a bit of a shame that radiation hardened chips are stuck so far in the past. I believe the volume is so low it does not warrant the investment to make radiation hardened versions more often.
- simonh 6y agoActually being stuck in the past might be a feature. Denser circuitry is likely to be more vulnerable to interference by ionising radiation and more vulnerable to physical damage from high energy particles.
- numpad0 6y agoParts of hardening include enlarging physical features and increasing operating voltage
- Dylan16807 6y ago> A consumer chip is a lot more likely to be permanently damaged by a "silver bullet" cosmic ray, though. How much more likely? Are the odds all that high over the mission duration?
- ericbarrett 6y agoI don't have any numbers for you, but here's a starting source: https://hps.org/publicinformation/ate/q11162.html https://hps.org/publicinformation/ate/q11162.html Most of my knowledge of the subject is from a friend who did his PhD dissertation on it; specifically, triply-redundant adder circuits for single-bit operations, allowing for some rad-hard chip designs using regular foundry processes.