# [ RadSafe ] Calculate Dose from Flash X-ray?

JPreisig at aol.com JPreisig at aol.com
Tue Aug 16 17:48:14 CDT 2011

Wow, is this some sort of star wars X-ray  unit for blowing things
out of the sky????

450 kV is a voltage.  450 x 10**3  Volts

6000 Amps (Whoa!!!!)  Amps are   charge per time, right????

electrons/time perhaps.

So, 450 x10**3 Volts  x 6000 charge  units/time

gives something like  450 x 6000 x  10**3  Volts(Charge units)/time

(an electron volt is a unit of energy,  right????)

So, you have:   450 x 6000 x  10**3  Energy units/time  (This is
power, i.e. a power unit).

The burst is 25 nanoseconds, i.e. 25 x  10**-9 seconds.

Energy is power times time, right????

4.5 x 6.0 x 10**8  Energy units/time x  2.5 x 10**-8 seconds =  4.5 x
6 x 2.5 (energy/time)seconds.

So, the result is in the final units of  Energy.  The preceding is a
calculation of the Energy

in one pulse of this X-Ray Beastie.   Now, do the calculation again,
with all the units correct.

Then find an NCRP document which has  a  table which suggests how to
find the exposure/
dose rate, dose equivalence rate or the  doses themselves.  Or resort
to using MCNP or EGS
or whatever to model the problem.  Nuff  said.  Do the math yourself,

Was just  watching TV again (the Military channel) and they were
discussing WW2
jet/rocket/spacecraft work being done by the  Germans.  Flying wings,
flying saucers and all
that.  We (USA), the Russians and  apparently Argentina all had some
contingent of German
Scientists that went to work for each  country after the War.  And
several years after the War,
reports of UFO sightings by civilians and aviation  personnel
increased greatly.  Funny huh.

UFO's with seven lights (or so, in a  fairly linear geometry) are
probably some incarnation
of the German flying wing.  Then, the  USA released into the public
domain the fact that the
stealth fighter/bomber were real.

Now, (lately) a spacejet (going Mach 10????)  was launched the other
day and quickly
proceded to find its way down into the Pacific  Ocean.  This spacejet
appears to have a
fairly triangular geometry when viewed from below,  and could explain
UFO observations of
a triad of lights flying in formation.

Apparently, many UFO observations are of USA and  other test
aircraft/spacecraft.  Of course.

Mach 10???  Is this performance due to  chemical propulsion, or some
other form of
propulsion????  Sounds like the  guidance/control system of this
spacejet needs some
(Kalman/Control surface???) tuning.

As for genetics,  perhaps space aliens are capable genetic/DNA
scientists and modellers.
We humans seem to be capable of doing genetic  design/manipulation
also.  And if there is
a supreme being (i.e. God) then perhaps he is the  master geneticist.
Perhaps space
aliens and/or humans were both designed and  created by HIM.  Perhaps
the big guy fibbed to
us Earthlings about being the only beings in the  universe.

Mach 10????  See you on Mars soon.   Bring your Geiger counter, your
MultiChannelAnalyzer
new (inexpensive) Japanese resin scintillation  detector???

Be  good!!!!       Regards,   Joseph R.  (Joe) Preisig, PhD

In a message dated 8/16/2011 3:46:54 P.M. Eastern Daylight Time,
kenneth.marshall at carestream.com writes:

I would  be interested to know what kind of unit this was and what
applications it  could be used for (Assuming Industrial Radiography).  If
you don't  want to broadcast to the entire group please send me a private
message.

Thanks,

Carestream

Kenneth  Marshall  Corporate Radiation Safety Officer, EHS
Environmental Health  & Safety

kenneth.marshall at carestream.com
Office +1 585.627.8523

From:   Bill Miller  <millerwf.bm at gmail.com>
Date:   08/12/2011 06:13  PM
Subject:        [ RadSafe ] Calculate Dose from  Flash X-ray?

The vendor said the  measured dose at 1 meter from a 450 kV, 6000 A X-Ray
unit with a 25  nanosecond burst is 18 milli-R.  Is there a way to
calcualte
the  expected beam strength from this unit?   thanks
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