> Just an idea ... got an airport reasonabley nearby?  Try making an
> appointment with the head of airport security, and explain to him as exactly

That's a good suggestion, I'll try to do that.

Still I am concerned that the machines might work in pulsed mode, rendering
the result of any empirical tests useless.

My design currently makes 2 measurements per second, and the setup time for the
PIC ADC is (much) less than 100us.  If the XRAY is pulsed at 1 Hz for example,
the probability that it hits my 2/10000th second window is very low.  In fact,
in this szenario and when my design happens to be vulnerable to the X-RAY, I have
a good chance of spending a whole hour running it through the X-RAY back and forth
without recording a single trigger.

I need some basic understanding of the inner workings of the X-RAY to establish
a test environment that does (100%) lay the fault open (if it exists).

I assume that X-RAY is pulsed because I think that continous radiation is more
dangerous but doesn't improve the security of the airport, and because I recall
having seen still-images on the terminal screens a couple of times.