RE: Fluoroscope (fwd)

[<sroys@xxxxxxxxxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sun, 17 Oct 2004 11:41:54 -0700
From: David Trimmell <humanb@xxxxxxxxxxxxxxxxxxx>
To: 'High Voltage list' <hvlist@xxxxxxxxxx>
Subject: RE: Fluoroscope (fwd)


Hi, well I have set everything up and used those screens I got from
Steve Roys all those years ago, and have some pictures. I found that the
X-ray screens take a minimum of 4 R/Hr. to fluoresce, and become quite
visible at over 15 R/Hr. I must say that I was somewhat surprised at
just how much radiation is put out by an x-ray tube. I was running at
around 40KV (half the ratting of the transformer) and with about 5 Volts
on the tube filament, I get over 140 R/Hr. at 6". No toy here folks.

Well here are the radiographs I took:

http://www.chaoticuniverse.com/webdoc3.htg/Nuclear_Stuff/X-Ray_stuff/X-r
ay_system/10-16-04_Radiographs/

Regards,

David Trimmell

Note: I certainly was not "holding" the camera! Everything was done
remotely. I hope no one tries this without proper training in radiation
protection and correct dosimetry and radiation detection equipment.

---------- Forwarded message ----------
Date: Sat, 9 Oct 2004 15:03:54 -0700
From: David Trimmell <humanb@xxxxxxxxxxxxxxxxxxx>
To: 'High Voltage list' <hvlist@xxxxxxxxxx>
Subject: Fluoroscope

Hi all, I will shortly be receiving a nice dental X-Ray transformer with
tube and filament transformer to go with it. This will be setup as PSU
for some vacuum experiments, but will also be used with the x-ray tube
to some x-ray experiments. One such thing I will want to try is a
Fluoroscope. I will, of course, be using proper Health Physics controls
and am aware of the hazards. There will be no exposure of "live" tissue.
But does anyone know of a source for the properly doped Zink Sulfide
phosphors, or strontium aluminate's? Has anyone here actually made a
Fluoroscope? I have no intentions of viewing this directly, as I will
use either a video camera or a reflected image. Believe me I have no
intention of sticking my head in a potentially lethal x-ray field. Any
suggestions would be great.

Thanks,

David Trimmell