Date: Thu, 14 Oct 2004 09:47:14 -0500

Author: "Cliff Bettis"

Subject: Re: Replacement cloud chamber

Post:

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Chele,

Something is wrong here. The half life of Ra 226 is 1620 years. The =
source should not be the problem.

Cliff
----- Original Message -----=20
From: cablem=20
To: tap-l@listproc.appstate.edu=20
Sent: Thursday, October 14, 2004 9:27 AM
Subject: Re: Replacement cloud chamber


I'm working on it. The source is mounted in a screw that seals the =
chamber, so its part of the whole design. I'm sending it off to Spectrum =
Techniques to see what they can do. It looks pretty easy to me.

And, as an indicator as to the age: my source was radium 226. You =
can't get that in any quantity now without a license. The demo has =
lasted 15 years. If only all my demos were as sturdy.

Chele


On 10/13/2004 5:17 PM, John Welch wrote:

You can't replace the source?

----- Original Message -----=20
From: "cablem"
To: "Tap-l"
Sent: Wednesday, October 13, 2004 1:33 PM
Subject: Replacement cloud chamber


Well, the source in the cloud chamber is dead. It was a nice Klinger=20
model...but I can't find any cloud chambers at Klinger (actually, the=20
site links are messed up and I can't find much of anything). The usual=20
places I've looked have the "student" models using lantern mantels, etc. =

I want something better. This one lasted 15 years. Does anyone know=20
where to get a really good one?

Chele

--=20
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Machele Cable
Lab Manager
Physics Dept.
Wake Forest University
Winston-Salem, NC 27109

Phone: 336-758-5532
Fax: 336-758-6142

"Foxtrot", 7/1/2004:
"3...2...1...Lift off!"
*CRASH*
"I think the payload was too top heavy."
"Maybe we shouldn't try launching Barbies."
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


=20


=20

--=20
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Machele Cable
Lab Manager
Physics Dept.
Wake Forest University
Winston-Salem, NC 27109

Phone: 336-758-5532
Fax: 336-758-6142

"Foxtrot", 7/1/2004:
"3...2...1...Lift off!"
*CRASH*
"I think the payload was too top heavy."
"Maybe we shouldn't try launching Barbies."
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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content=3Dtext/html;charset=3DISO-8859-1>




Chele,

 

Something is wrong here. The half life =
of Ra 226 is=20
1620 years. The source should not be the problem.

 

Cliff

style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
----- Original Message -----

style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black">From:=20
cablem =

To: title=3Dtap-l@listproc.appstate.edu=20
=
href=3D"mailto:tap-l@listproc.appstate.edu">tap-l@listproc.appstate.edu A>=20

Sent: Thursday, October 14, =
2004 9:27=20
AM

Subject: Re: Replacement cloud=20
chamber

size=3D2>
I'm working on it. The source is mounted in =
a screw=20
that seals the chamber, so its part of the whole design. I'm sending =
it off to=20
Spectrum Techniques to see what they can do. It looks pretty easy to=20
me.

And, as an indicator as to the age: my source was radium =
226. You=20
can't get that in any quantity now without a license. The demo has =
lasted 15=20
years. If only all my demos were as sturdy.

Chele


On =

10/13/2004 5:17 PM, John Welch wrote:

cite=3Dmid005b01c4b169$fd43d4e0$b11510ac@student.cc.cabrillo.edu=20
type=3D"cite">
You can't replace the source?

----- Original Message -----=20
From: "cablem"
href=3D"mailto:cablem@wfu.edu"><cablem@wfu.edu>
To: "Tap-l" href=3D"mailto:tap-l@listproc.appstate.edu"><tap-l@listproc.appstate.e=
du>

Sent: Wednesday, October 13, 2004 1:33 PM
Subject: Replacement cloud chamber



Well, the source in the =
cloud chamber is dead. It was a nice Klinger=20
model...but I can't find any cloud chambers at Klinger (actually, the=20
site links are messed up and I can't find much of anything). The usual=20
places I've looked have the "student" models using lantern mantels, etc. =

I want something better. This one lasted 15 years. Does anyone know=20
where to get a really good one?

Chele

--=20
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Machele Cable
Lab Manager
Physics Dept.
Wake Forest University
Winston-Salem, NC 27109

Phone: 336-758-5532
Fax: 336-758-6142

"Foxtrot", 7/1/2004:
"3...2...1...Lift off!"
*CRASH*
"I think the payload was too top heavy."
"Maybe we shouldn't try launching Barbies."
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~






--=20
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Machele Cable
Lab Manager
Physics Dept.
Wake Forest University
Winston-Salem, NC 27109

Phone: 336-758-5532
Fax: 336-758-6142

"Foxtrot", 7/1/2004:
"3...2...1...Lift off!"
*CRASH*
"I think the payload was too top heavy."
"Maybe we shouldn't try launching Barbies."
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ML>

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From cablem@wfu.edu Thu Oct 14 09:07:18 2004

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