[ RadSafe ] Calculate Dose from Flash X-ray?
JPreisig at aol.com
JPreisig at aol.com
Tue Aug 16 17:48:14 CDT 2011
Hey Radsafe,
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,
please.... Thanks
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
and detector, your Instadose badges (and new Instadose neutron
badges???) and your
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>
To: radsafe at health.phys.iit.edu
Date: 08/12/2011 06:13 PM
Subject: [ RadSafe ] Calculate Dose from Flash X-ray?
Sent by: radsafe-bounces at health.phys.iit.edu
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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