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Re: [TCML] Need ALPHA WINDOW to detect x-rays in phantom streams
Seems like even gamma rays can be generated by storms:
Terrestrial thunderstorms. In a terrestrial gamma-ray flash a brief pulse
of gamma radiation can occur in the Earth's atmosphere, inside
thunderstorms. These gamma rays are thought to be produced by high
intensity static electric fields accelerating electrons, which then produce
gamma rays by bremsstrahlung as they collide with and are slowed by atoms
in the atmosphere. Gamma rays up to 100 MeV can be emitted by terrestrial
thunderstorms, as first discovered by space-borne observatories. Current
theories hold that the strong electric fields within thunderclouds unleash
avalanches of electrons that reach relativistic speeds before colliding
with air molecules to release powerful gamma rays. This raises the
possibility of health risks to passengers and crew on aircraft flying in or
near thunderclouds.
>From http://en.wikipedia.org/wiki/Gamma_ray
Hope no TC ever built is that powerful ;)
On Fri, Nov 23, 2012 at 3:04 AM, William Beaty <billb@xxxxxxxxxx> wrote:
>
> On Wed, 21 Nov 2012, Jeff Behary wrote:
>
>> (Though, recently, lightning experts in Melborne FL have witnessed some
>> of my coils and suggested the possibilty of very low level X-Rays being
>> produced from the streams - they were the first experimenters to document
>> non-vacuum X-Rays generated from lightning as well as certain laboratory
>> sparks.super cool work!)
>>
>
> On detecting TC x-rays, here's a possible source of confusion of which to
> be aware. Geiger counters are extremely sensitive to x-rays; much more
> sensitive than any phosphor screen ...but this only is true of fairly hard
> x-rays. Down below 20KV, soft x-rays have a hard time getting through a
> glass x-ray tube, much less a metal GM counter wall. They also don't
> penetrate far into water, so they're responsible for the early cases of
> melanoma (back before the medical designers learned to include a low-cut
> filter.)
>
> So, in order to solidly reject the possibility of soft x-rays, you really
> need an alpha-window GM counter. If you only have an inexpensive
> beta/gamma detector, then you cannot use it to reject the existence of all
> x-rays.
>
> But also, I've seen one GM counter which, when a "vacuum tester" coil was
> waved about 9" away from the probe cable, responded with great quantities
> of random-seeming clicks. I wouldn't have expected such RF interference to
> sound like a particle flux, yet it did. No buzz, no 120Hz. Best to use a
> tiny kit-style GM counter inside a metal box with a screen-window.
>
> Here's a brief holiday sale on a tiny GM counter kit, $9.00 without GM
> tube...
>
> http://www.goldmine-elec-**products.com/prodinfo.asp?**number=G18410<http://www.goldmine-elec-products.com/prodinfo.asp?number=G18410>
>
> Then just buy a 712 alpha-window tube for about $100 from sparkfun etc.,
> https://www.sparkfun.com/**products/8875<https://www.sparkfun.com/products/8875>
> ?
> http://www.lndinc.com/**products/711/<http://www.lndinc.com/products/711/>
> http://www.imagesco.com/**geiger/geiger-counter-tubes.**html<http://www.imagesco.com/geiger/geiger-counter-tubes.html>
>
> Also:
> https://www.sparkfun.com/**products/10742<https://www.sparkfun.com/products/10742>
> ?
> http://www.**electronickitsbychaneyelectron**
> ics.com/prodinfo.asp?number=**c6998<http://www.electronickitsbychaneyelectronics.com/prodinfo.asp?number=c6998>
>
>
> (((((((((((((((((( ( ( ( ( (O) ) ) ) ) )))))))))))))))))))
> William J. Beaty SCIENCE HOBBYIST website
> billb at amasci com http://amasci.com
> EE/programmer/sci-exhibits amateur science, hobby projects, sci fair
> Seattle, WA 206-762-3818 unusual phenomena, tesla coils, weird sci
> ______________________________**_________________
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