effect of xray on fpga electronic circuits

Can bits be flipped?

Do you need a RadHard FPGA?

Cheers, Jon

A little bit of lead foil goes a long way. Depends on how much XRAY I imagine. Be careful.

Ever consider using a phosphor plate to turn the x-rays into visible light first?

Is it internal flash or external flash? If anything, flash would be the weakest link.

I would think an old fashioned tube camera with tube amplifiers would be the most radiation resistant.

Hi,

There are rad-hard CCDs available. There are also rad-hard FPGA's available. Actel uses anti-fuse technology, which is inherently rad- hard. We (fellow engineers and I at my aerospace company) use Actel and Quicklogic FPGAs for space-based applications.

Tom P. =2E

To all it matters to what level of radiation from your source gets to your CCD camera. As a X Product Manager for a X-ray imaging company if we placed the CCD camera behind a intensifier tube -- lots of material between it and the camera a few lens -- we had little problem with noise from the x-ray beam we we producing. We could still detect some x-rays at this point but they were real weak. Now when we put the CCD (Sony) B/W camera in the direct beam path we had issues of noise in the CCD detector. We landed up placing the camera off axis. When we went to a special CCD camera behind a screen and a little glass it was not a bad but could still be seen and needed averaging to get rid of the problems we could see. Hope this helps-- Place the camera off axis if at all possible remember a lot of thing are transperant to x- ray but will reflect light.

Regards Cliff