Date: Tue, 24 May 2011 14:40:59

Author: Paul Nord

Subject: Crookes Tube (was Re: Demo health hazards)

Post:


--Apple-Mail-25--606138188
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
charset=us-ascii

(I think that this message did not go through. Sorry if it's a =
duplicate.)

There was an excellent article documenting the X-Ray intensity from one =
of these tubes. Someone had placed dosimeters at various distances in a =
grid around one of these and mapped the radiation flux.

I've lost my reference for that article. I think it was linked here: =
Deflection of an electron beam | PIRT - Physics Instructional Resource =
Team

Does anyone have that?

Paul


On Apr 22, 2011, at 4:53 PM, Paul Nord wrote:

> I'm picking up a very old thread to share an important video I just =
found. This was made by Adolf Cortel. It's a very convincing =
demonstration of the x-ray hazard from one of these old Crookes Tubes.
> YouTube - Cathode-ray tubes: be aware of X-Rays!
>=20
> Paul
>=20
> On Feb 13, 1996, at 2:14 PM, clifford bettis wrote:
>=20
>> I have a letter in my files=20
>> concerning all of our crookes type tubes and I tell people who insist=20=

>> on using this equipment that I will set it up but I will not test it=20=

>> nor will I be responsible for the regulatory fall out if someone=20
>> complains. I show them the letter documenting what kind of exposure=20=

>> you can get from something as simple as an electron beam tube and a=20=

>> hand held tesla coil. I have never had anyone insist further than=20
>> that, especially since there are safe alternatives to most of the=20
>> things the want to show.
>=20



--Apple-Mail-25--606138188
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
charset=us-ascii

(I think that this message did not go through. =
Sorry if it's a duplicate.)There was an excellent article documenting the X-Ray =
intensity from one of these tubes. Someone had placed dosimeters =
at various distances in a grid around one of these and mapped the =
radiation flux.Deflection of an electron beam =
| PIRT - Physics Instructional Resource =
TeamDoes anyone have =
that?PaulOn Apr 22, 2011, at 4:53 PM, Paul Nord wrote:I'm picking up a very old =
thread to share an important video I just found. This was made by =
Adolf Cortel. It's a very convincing demonstration of the x-ray =
hazard from one of these old Crookes Tubes.YouTube =
- Cathode-ray tubes: be aware of =
X-Rays!PaulOn Feb =
13, 1996, at 2:14 PM, clifford bettis wrote:I have a =
letter in my files concerning all of our =
crookes type tubes and I tell people who insist on using this equipment =
that I will set it up but I will not test it nor will I be =
responsible for the regulatory fall out if someone complains. I show them =
the letter documenting what kind of exposure you can get from =
something as simple as an electron beam tube and a hand held tesla coil. I =
have never had anyone insist further than that, especially since =
there are safe alternatives to most of the things the want to =
show.=

--Apple-Mail-25--606138188--

From tap-l-owner@lists.ncsu.edu Tue May 24 18:56:10 2011
Received: from psmtp.com (na3sys009amx206.postini.com [74.125.149.46])
by uni00ml.unity.ncsu.edu (8.13.7/8.14.4/Nv6.2010.0805) with SMTP id p4OMu8kP009996
for ; Tue, 24 May 2011 18:56:08 -0400