David Rieben wrote:
Hi, snipperzz: ----- Original Message ----- From: "Frank" <fxrays@xxxxxxxxxx> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx> Sent: Sunday, September 26, 2010 6:00 PM Subject: Re: [TCML] current limit system and X-raysAlmost the universal voltage for most X ray work is 40-60 KV.Using an NST will not work unless you can series them, even a 15KV transformer will be pushed.Actually, dental x-rays typically run 60 to 70 kV at onlya few mAs. However, medical x-rays can run >100 kV at hundreds of mAs, depending on how much soft tissue thatmust be pentrated to get a clear image of the target "innards". Of course, exposure time is nearly always in the fractions of a second.
and it gets trickier than that, because a standard accelerating voltage for medical x-rays is 110kV.. BUT, the actual energy of the xrays coming out is quite a bit less ( peaking at around 30keV), but a typical x-ray machine will use an aluminum "hardening" filter that filters out the lower energy photons, leaving the remainder averaging up around 50-60 keV.
But.. it would be unusual to get significant xray production from NST voltages, even in a hard vacuum. After all, the maximum energy would be the 21kV peak voltage from a 15kVrms NST, and just as with the 110kVp xrays, the vast majority of photons will be much lower energy, and not even make it out of the tube.
_______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla