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Question electrons positively charged?? 

Forum: Fields: Magnetic and Otherwise
Date: 09 Aug, 2011
From: Jérôme Roccaz <Jérôme Roccaz>

Hi everyone,

as I need to introduce an electric field in a ionisation chamber, I previously made some tests in order to be sure what I do is right.

I've modeled a box full of vacuum, in which I've implemented a uniform and linear electric field toward z > 0 axis. I have shot particles along x > 0 axis and compared data with and without the field.

First particles shot are 1500keV alphas : their trajectories is deviated toward z > 0, what is physically expected.

Second particles shot are 100keV electrons : their trajectories is deviates toward z > 0, whereas it is physically expected that the deviation occurs toward z < 0 according to negative charge of e-.

Last particles shot are 100keV neutron : no deviation, what is physically expected.

I've made a visualisation of trajectories : alphas trajectories are drawn in blue and electrons trajectories is red, what is expected with geant4.

Did I miss something, explaining electrons behaves like positively charged particles?

thanks

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1 Idea: Re: electrons positively charged??   (Vladimir Ivanchenko - 09 Aug, 2011)
(_ More: Re: electrons positively charged??   (Jérôme Roccaz - 09 Aug, 2011)
(_ Idea: Re: electrons positively charged??   (Vladimir Ivanchenko - 09 Aug, 2011)
(_ None: Re: electrons positively charged??   (Jérôme Roccaz - 09 Aug, 2011)
(_ Feedback: Re: electrons positively charged??   (Jérôme Roccaz - 17 Aug, 2011)
(_ Feedback: Re: electrons positively charged??   (Gumplinger Peter - 17 Aug, 2011)
(_ None: Re: electrons positively charged??   (Jérôme Roccaz - 17 Aug, 2011)
1 None: Re: electrons positively charged??   (Jérôme Roccaz - 17 Aug, 2011)
2 Feedback: Re: electrons positively charged??   (Gumplinger Peter - 18 Aug, 2011)
1 None: Re: electrons positively charged??   (Jérôme Roccaz - 18 Aug, 2011)
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