Basic Astropulse Simulation

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Bill Butler
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Message 1582855 - Posted: 7 Oct 2014, 2:53:27 UTC

After attending a COMSOL Multiphysics workshop, I was given an evaluation period to use the software. I would like to model an electromagnetic (EM) wave passing through the interstellar medium (ISM). An EM wave passing through the ISM plasma is “dispersed” in time and frequency. The model can be configured to study dispersion as a function of frequency, dispersion measure (DM), or other desired variable of interest.

The model is relevant to SETI’s Astropulse application. Conceptually, Astropulse deconvolves a dispersed EM pulse to recover the source waveform. The model would also clearly be relevant to other astrophysical work.

This study will be kept as simple as possible, yet observe dispersion. COMSOL has Maxwell’s equations already built in. So setting up an EM plane wave propagation in space is ready now. It seems the key is modeling the EM wave interaction with a low density hydrogen plasma. If someone is interested in helping me with this, I can also work with COMSOL support to make this simulation happen.

COMSOL has a built in Report Generator and this will be the output of the project.
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Profile Julie
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Message 1583003 - Posted: 7 Oct 2014, 10:55:22 UTC

Good Luck with the project Bill:)
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Profile Wiggo "Socialist"
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Message 1583007 - Posted: 7 Oct 2014, 11:05:21 UTC - in response to Message 1583003.  

Good Luck with the project Bill:)

+1

Cheers.
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Bill Butler
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Message 1583089 - Posted: 7 Oct 2014, 14:17:16 UTC - in response to Message 1582855.  

Thank you Julie! Hoping that a project scientist will advise me on this!
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Bill Butler
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Message 1583090 - Posted: 7 Oct 2014, 14:17:54 UTC - in response to Message 1583007.  

Thanks Wiggo! Fingers crossed!
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Message 1583905 - Posted: 9 Oct 2014, 12:21:01 UTC - in response to Message 1583007.  

Good Luck with the project Bill:)

+1

Cheers.

+2 :)
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Bill Butler
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Message 1583919 - Posted: 9 Oct 2014, 13:14:16 UTC - in response to Message 1583905.  

Thank you Thomas!
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Message boards : SETI@home Science : Basic Astropulse Simulation


 
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SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.