Re: X-Ray

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "David Rieben" <drieben-at-midsouth.rr-dot-com> 

Rich,

I'm not the most qualified to answer this but I think significant
hard x-rays aren't generated w/out a very 'hard" vacuum, like
down to a torr or less and only at voltages over 50 kV. Most
x-ray power supply transformers are rated at either 125 kV or
150 kV. Only x-ray machines that are designed for irradiating
very thin tissue samples, like dental x-rays for instance, are rated
at voltages significantly less than 100 kV, but are still >50 kV.
So, the bottom line is it's fairly difficult to generate x-rays unless
you're really trying ;^))

BTW, old flyback driven picture tubes in large color TVs gene-
rally operated in the 25 to 30 kV range and although a CRT
is basically an x-ray generating tube, at only 30 kV, the resul-
tant x-rays that are generated are generally too low of an ener-
gy level to be of any significant radiation hazard (< 50 kV).

David Rieben
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, August 10, 2004 4:26 PM
Subject: X-Ray


 > Original poster: "Rich" <rdjmgmt-at-socket-dot-net>
 >
 > I am new at this and I am starting my first two coils , one with a 15Kv
 > 30ma NST and a tube coil . I have a few pulse tubes
 > ( C1583A ) that are good up 30Kv . My question at what voltage do I start
 > worrying about X-Rays?
 >
 > Rich
 >
 >