Moderator Simulation Study

This area is for discussions involving any fusion related radiation metrology issues. Neutrons are the key signature of fusion, but other radiations are of interest to the amateur fusioneer as well.
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Carl Willis
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Moderator Simulation Study

Post by Carl Willis » Sat Nov 22, 2003 3:37 am

Hi folks,

I have included a Word document with embedded graphs that describes a computer-simulated comparison of three materials as moderators: light water, heavy water, and saturated hydrocarbons. Specifically, this document shows what thickness you need of these materials to get peak thermal or epithermal neutron fluences with a Farnsworth Fusor as the source.

I'll post the other parts of this little project as it continues. Let me know if you have any questions!

-Carl
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Jon Rosenstiel
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Re: Moderator Simulation Study

Post by Jon Rosenstiel » Mon Nov 24, 2003 2:41 am

Thanks Carl, good info. Just the incentive, (justification?), I need to buy a chunk of HDPE. McMaster-Carr is asking $61.00/foot for 6-inch diameter HDPE. Anyone know of other sources?

Jon Rosenstiel

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Re: Moderator Simulation Study

Post by DaveC » Mon Nov 24, 2003 8:51 am

Jon - Don't the sources, but you can buy HDPE water pipe up to about 2" wall thickness in all sorts of diameters.. Do not know any prices.

Dave Cooper

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Richard Hull
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Re: Moderator Simulation Study

Post by Richard Hull » Mon Nov 24, 2003 3:29 pm

Really nice and useful report, Carl. We all are looking forward to follow-up pieces.

Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

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Re: Moderator Simulation Study

Post by Starfire » Mon Nov 24, 2003 8:44 pm

Tks Carl - a good piece of work - joins the reference library and the archives.

Jon Rosenstiel
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Re: Part II ?

Post by Jon Rosenstiel » Mon Feb 21, 2005 6:35 pm

Carl,

Anxiously awaiting part two.

Jon Rosenstiel

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Carl Willis
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Re: Part II ?

Post by Carl Willis » Tue Feb 22, 2005 4:48 am

Hi Jon,

I need to get a "round tuit"...

MCNP is a powerful tool and Part II (energy-dependent fluxes from Fusor neutrons in large moderators) is a cakewalk. The only problem is that I have my computer, and the 8-processor UNIX machine I use, booked solid with academic MCNP jobs.

I've made a promise to deliver more pieces of this study and so I'll follow through as soon as possible. But that may be awhile!

Also Jon, thanks very much for offering to show me your lab if I ever get out to California. There may be an opportunity this summer since there's a good chance I'll be out west again.

-Carl
Carl Willis
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Jon Rosenstiel
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Re: Part II ?

Post by Jon Rosenstiel » Tue Feb 22, 2005 5:28 am

Carl,

I know you're pretty busy, but figured a gentle reminder wouldn't hurt.

The problem is that you did too good of a job on part one, and now I'm hooked!

Hope you can make it to the left coast later this year.

Jon Rosenstiel

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