Overview of D-D and D-T Fusion Detectors

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.
Harald_Consul
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Re: Overview of D-D and D-T Fusion Detectors

Post by Harald_Consul » Thu Oct 25, 2018 11:49 am

Robert Dwyer wrote:
Wed Oct 24, 2018 8:33 pm
If you want to (...) detect D+T fusion reactions (...). The same detection methods for D+D will work for D+T, neutron moderators are a wonderful thing for activation detectors.
Ok. All D-D fusion detection methods by neutron detection, that are mentioned in FAQ -Update- Neutron detection methods (2015), will also work to detect a D-T fusion.

That's been all I wanted to know. Thank you so much, guys.

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Re: Overview of D-D and D-T Fusion Detectors

Post by John Futter » Thu Oct 25, 2018 6:19 pm

Harald
please do not repeat what others have written
this is NOT FARCEBOOK or any other social media site.

It is time you stopped posting and read all the forums here ---It will take quite some time. Then and only then feel free to ask questions.

Harald_Consul
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Re: Overview of D-D and D-T Fusion Detectors

Post by Harald_Consul » Sun Dec 09, 2018 1:24 pm

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Why isn't it possible to place a - high voltage resistant - alternative (non-neutron-)detector within the fusion chamber?
Last edited by Harald_Consul on Sun Dec 09, 2018 6:56 pm, edited 3 times in total.

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Dennis P Brown
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Re: Overview of D-D and D-T Fusion Detectors

Post by Dennis P Brown » Sun Dec 09, 2018 2:08 pm

Please read and understand the posts people write for you - stop quoting! Until you do, I for one, will not further answer your questions. Doing what you are asked is called being a good member.

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Richard Hull
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Re: Overview of D-D and D-T Fusion Detectors

Post by Richard Hull » Sun Dec 09, 2018 10:22 pm

Of course it is possible to place a detection device inside the fusor or any fusion device. It will be possible once you design, create and test it out.

Many things are within the realm of possibility. I have heard of folks putting PIPs detectors in such environments. I have also heard of a lot of PIPs detectors being destroyed, as well. Got the several hundreds of dollars for the detector and electronics? Give it a whirl and....again, get back to us with your results.

Sounds like you are hopeful of the physics of your idea working out just the way you plan for it to. The real physics of a fast ionized gas environment presents nothing but a path with a lot of snares to the feet of the untested, hopeful theorist and experimenter. In the end, only the hands-on experimenter comes out the other side with knowledge that is costly, hard won and worth listening to.

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.

Harald_Consul
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Re: Overview of D-D and D-T Fusion Detectors

Post by Harald_Consul » Wed Dec 12, 2018 1:07 pm

Thanks Richard.

To be frank I was thinking about something much more simple than a passivated implanted planar silicon detector. As my fusor is not a plasma fusor but a beam on target design (without or very little plasma in the fusion chamber), I was thinking about simply using a Geiger-Müller-counter in the first step. I am aware, that a Geiger-counter does count any ionizing radiation, thus it is not a nuclear fusion specific detector. However, if I managed to keep it away from the beam, maybe it could provide me a first indication. Even if the measured Geiger-Signal under beam on target was not zero (so called positive bias of sensor), I could recalibrate this positive bias to zero again. Fortunately, I am a statistician, who can easily handle a lot of (bias and noise) measuring problems.

Please keep in mind, that maybe not all (amateur) fusion enthusiast in this forum may be this fortunate/ prosperous to possess the equipment you have.

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Richard Hull
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Re: Overview of D-D and D-T Fusion Detectors

Post by Richard Hull » Wed Dec 12, 2018 9:18 pm

A GM tube in the vacuum would measure only x-rays and probably swamp out to a gentle arc condition, which typically ends the tube's life. A GM counter outside of your beam device would also go crazy as X-rays penetrate the device as you approach fusion voltages. Forget any attempt to use a GM tube or GM counter to herald fusion or neutron production.

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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