To give you an idea of density/frequency of this occurring: my wife's CCD for he... | Hacker News

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		yellowbkpk on June 24, 2010 \| parent \| context \| favorite \| on: Attack of the cosmic rays: Undetected memory error... To give you an idea of density/frequency of this occurring: my wife's CCD for her PhD experiments routinely (roughly 1 in 5) pick up huge spikes from cosmic rays during her 30-second exposures. The CCD is less than an inch square and she's 2 floors down from ground level.

Tichy on June 24, 2010 [–]

Is she certain that it is not another PhD student one floor above her experimenting with X-Rays?

yellowbkpk on June 25, 2010 | [–]

Yes, she uses the specific room in the building because it's farthest away from noisey experiments.

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