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The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:20:11 ADT
Mike Rosing (eresrch@msn.fullfeed.com)
Tue, 7 Jul 1998 13:46:50 -0500 (CDT)
On Tue, 7 Jul 1998, Mark Tillotson wrote:
> X-ray machines are just glorified CRTs, no problem at all sending
> intense nano-second pulses if you want to...
But EM radiation is easy to shield, at all wavelengths. Thermal neutrons
gets to be a bit tougher.
BTW, someone mentioned a portable accelerator. About 15 years ago Los
Alamos built one for finding nuke bombs, they only needed to be within a
mile or so of a suspected device and could generate enough neutrons in
a given direction to increase background high enough to find it easily.
The difference is that the bomb responds well to neutron flux by spitting
out lots more radiation. They (Los Alamos) also built an accerator on a
rocket (BEAR was the name I think). That won't affect a radioactive
source, but it might change the statistics. It would be easy to monitor
for, but I don't think I'll be worring about it.
I will be analyzing the random signal which I digitize. I hope to gather
data at around 10k bytes per second. That's *signal* rate. The decay
rate is on the order of 5k per second. Now, in addition to the random
timing, there is also the random direction that a particle takes thru
the ion chamber. This path determines the number of electrons released
in the air chamber, which in turn determines the peak voltage detected.
One of the main questions I have is what to look for as random data.
The signal is periodic, every time there's a decay which passes thru the
ion chamber there is a voltage peak. There is *always* a decay within
200 microseconds, when two decays occur almost simultaneously the voltage
peak is very high. So I have both timing (zero cross overs) and raw
voltage as possible sources of randomness.
Any ideas on how to distill randomness from this data appreciated.
Patience, persistence, truth,
Dr. mike
The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:20:11 ADT