Build Positron Accelerator | Safety Tips & Experiments

PhysicsDad
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Hello all,

My son and I have been doing experiments with a simple cloud chamber and I am curious what type of accelerator I might be able to build that would be strong enough to make positrons? Then I will use a magnet with the cloud chamber to show him that they are charged differently.

A note, I am aware that I will still need to research the proper safety precautions before actually using it.

Any suggestions or help with this project would be great.

Thank you.
 
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You will not be able to build such an accelerator safely. (Or legally)

If you want something positive, try an alphs source like a lantern mantle or welding rods.
 
Thank you.

I also understand that smoke detectors have a small amount of americium. Would that produce enough particles to actually be useful?
 
Why would you want to start poking around a smoke detector, and risk contaminating your house with little bits of amercium when a latern mantle costs a dollar or two?
 
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I'm following this paper by Kitaev on SL(2,R) representations and I'm having a problem in the normalization of the continuous eigenfunctions (eqs. (67)-(70)), which satisfy \langle f_s | f_{s'} \rangle = \int_{0}^{1} \frac{2}{(1-u)^2} f_s(u)^* f_{s'}(u) \, du. \tag{67} The singular contribution of the integral arises at the endpoint u=1 of the integral, and in the limit u \to 1, the function f_s(u) takes on the form f_s(u) \approx a_s (1-u)^{1/2 + i s} + a_s^* (1-u)^{1/2 - i s}. \tag{70}...

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