Date: Fri Feb 9 10:15:53 2007

Author: Gerald Zani

Subject: Re: Discharge Electrometer w Alpha Source

Post:
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Gee Cliff, it really worked outstanding at Syrcuse workshop with that foil leaf electroscope.
It discharged pretty much pronto. -- JZ

At 10:05 AM 2/9/2007, you wrote:
>Jerry,
>
>I used the Po-210 Source.
>
>Cliff
>----- Original Message -----
>From: Gerald Zani
>To: tap-l@lists.ncsu.edu
>Sent: Friday, February 09, 2007 8:51 AM
>Subject: Re: [tap-l] Discharge Electrometer w Alpha Source
>
>Cliff,
>
>What source did you use at the demo workshop in Syracuse? -- JZ
>
>At 09:20 AM 2/9/2007, you wrote:
>>Jerry,
>>
>>I tried my electrometer this morning. I charged the cage so the electrometer read about 80 volts. I then held the Po 210 (1/2 mCi when new; it's about 2 years old) source between the inner cage and outer grounded cage. It took about a minute for the voltage reading to drop to half its initial value. I repeated the experiment this time charging the cage to -80 volts and got the same result: about a minute to remove half the charge.
>>
>>Cliff

Gerald Zani e-mail: Gerald_Zani@brown.edu
Manager of Demonstrations phone: (401) 863-3964
Department of Physics FAX: (401) 863-2024
Brown University Providence, RI 02912-1843 USA

http://www.physics.brown.edu/physics/demopages/demo/
http://www.physics.brown.edu/physics/userpages/staff/Gerald_Zani/index.html

Do a little more of that work which you have confessed to be good,
Which you feel that society and your most Just Judge rightly demand of you.
Cultivate the tree which you have found to bear fruit in your soil.
If you have any experiments you would like to try, try them.
Now's your chance.

Henry David Thoreau, Journal entry, 1850.


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Gee Cliff, it really worked outstanding at Syrcuse workshop
with that foil leaf electroscope.
It discharged pretty much pronto. -- JZ
At 10:05 AM 2/9/2007, you wrote:
Jerry,

I used the Po-210 Source.

Cliff


----- Original Message -----

From: Gerald Zani


To: tap-l@lists.ncsu.edu

Sent: Friday, February 09, 2007 8:51 AM

Subject: Re: [tap-l] Discharge Electrometer w Alpha Source

Cliff,

What source did you use at the demo workshop in Syracuse? -- JZ

At 09:20 AM 2/9/2007, you wrote:

Jerry,



I tried my electrometer this morning. I charged the cage so the electrometer read about 80 volts. I then held the Po 210 (1/2 mCi when new; it's about 2 years old) source between the inner cage and outer grounded cage. It took about a minute for the voltage reading to drop to half its initial value. I repeated the experiment this time charging the cage to -80 volts and got the same result: about a minute to remove half the charge.



Cliff


Gerald Zani e-mail: Gerald_Zani@brown.edu
Manager of Demonstrations phone: (401) 863-3964
Department of Physics FAX: (401) 863-2024
Brown University Providence, RI 02912-1843 USA

http://www.physics.brown.edu/physics/demopages/demo/
http://www.physics.brown.edu/physics/userpages/staff/Gerald_Zani/index.html

Do a little more of that work which you have confessed to be good,
Which you feel that society and your most Just Judge rightly demand of you.
Cultivate the tree which you have found to bear fruit in your soil.
If you have any experiments you would like to try, try them.
Now's your chance.

Henry David Thoreau, Journal entry, 1850.



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