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Joseph Chikva said:"Accelerating a beam is pretty energy intensive"
Not more intensive then heating plasma by one of following ways:
-Ohmic heating
-Neutrals beams (here namely accelerating is used)
-RF
or their combination
"These will thermalize and you'll end up with one hot beam."
All well and good for maintaining a stable plasma, cooling is desired in maintaining a beam, it is the energy costs I'm skeptical of and so of the followingRussian physicist Budker in his "Stabilized electronic beam" article has shown that in case of enough high relativism of electronic beam (the range from 1.5 to 5 MeV is already enough) and partial compensation of space charge, this beam will radiate and consequently will cool.
Also the radiation of electrons will struggle with the majority of types of instabilities.
And by the Method we need not total but only partial compensation of positive space charge.
[/quote]So, we easily can find conditions when fusion reaction responses will exceed the energetic expenses.
And I think that further utilisation of fusion energy will be easier too.
Can we please see the patent application or application NoJoseph Chikva said:Hello All,
This is patent pending Method of Nuclear Fusion (attached file)
What do you think about this?
Joseph
I have discussion with some people really involved in fusion programs. And on base of that discussion can say that electron beam injected to background plasma suffers very fast developing - so-called two-stream instability. I think that Polywell will not have a future.jambaugh said:But I think Bussard's Polywell is more likely to succeed.
Joseph Chikva said:I have discussion with some people really involved in fusion programs. And on base of that discussion can say that electron beam injected to background plasma suffers very fast developing - so-called two-stream instability. I think that Polywell will not have a future.
Joseph Chikva said:Thank you, I understand. I am not lawyer but in general am familiar with patent legislation.
Here I published the main idea of invention.
And your answer is like that if I will say that married and have two sons you will ask me marriage certificate and birth certificates.
My publication here was caused only with my interest to hear the judgement of physicists and not lawyers.
Two-stream instability can stop and destroy those electron beams.Drakkith said:What does instability have to do with the polywell? I don't know a whole lot about plasma physics, but I didn't think the polywell had anything to do with various plasma effects. The only thing I remember them needing to work on is efficient containment of the electrons.
Joseph Chikva said:Two-stream instability can stop and destroy those electron beams.
Thank you. I know a lot of patents made during 50 years since researches on controlled nuclear fusion started. Where are they? How many time needed for research & development and further commercialization? Duration of patent?qsa said:even if you register with patent office now that does not help you, because the office will search and will find the info and will declare it unpatentable since it was already published. maybe you should delete the post, not sure how that will work.
I am not a big expert in plasma physics too. But if you have not beam and have only scattered electrons the depth of potential well for ions would be too small.Drakkith said:Exactly what do you mean by that? As long as the electrons are getting inside the containment device, does it matter where they are after that? As far as I know they inject the electrons inside the grid, so I don't see the problem. The electrons are entering a negativly charged area anyways, which means that they won't stay in streams and will spread out inside the device, which is just what they are supposed to do.
I'm not arguing, I really don't understand.
Joseph Chikva said:I am not a big expert in plasma physics too. But if you have not beam and have only scattered electrons the depth of potential well for ions would be too small.
Magnetic field will hold well only those electrons that will have the arranged velocities (beams).Drakkith said:Why's that? Increasing the volume of the reactor would easily solve this problem. (but at a cost) Besides, the magnetic fields hold the electron well in place.
Magnetic field will hold well only those electrons that will have the arranged velocities (beams). As I know in Polywell is proposed to use the magnets only for holding of electrons beams. Ions should be confined by the field created then by electrons.
Drakkith said:I don't believe that's what happened during their project. I've read the report released by them and they most definitely held the majority of the electrons. They inject the electrons inside and hold them there in a well. The "beam" has nothing to do with the operation of the device except to inject electrons. Once the electrons are injected they take random directions in the well.
Joseph Chikva said:Thank you. I know a lot of patents made during 50 years since researches on controlled nuclear fusion started. Where are they? How many time needed for research & development and further commercialization? Duration of patent?
My purpose is only to push interest to the new Method.
Thanks. Patent application on reactor design on base of Method is under way. But I know only a single event when a research in Nuclear Fusion field was financed by private funds on commercial basis. This is Tri-Alpha company. The rest researches as I know are financed by Governments through approved programs.qsa said:I understand your motive. But, if you really care about your idea and you want to see it happen (one day) you are a lot better off patenting it since investors will feel jittery about a non-patent idea (especially since it is high risk). Also, you will be more motivated and the investors have some one to trust. Of course, I speak out of experience.
Joseph Chikva said:
- Have you ever read about plasma density & temperature reached by Bussard or by other people who engaged with Polywell now? I know about experiments but nothing on results.
- I think that you are mistaken on process's physics when saying: Once the electrons are injected they take random directions in the well
- What free run of electrons in the Polywell when they take random directions in the well? And by what they should be confined?
- What should be the sizes of Polywell in this case?
- Beam that is injecting electrons and other electrons already injected will interact or no? Would this have conditions for two-stream instability creation?
- What depth will have potential well of randomized electrons cloud?
- Etc.
I think you are mistaken and ions with low density and temperature of even a few Ev-s will have very big free run (average run of particle from one collision before another collision). And no collision = fusion, but a lot of collisions and one fusion event. So, you need very-very big reactor if the depth of potential well will not be big enough.Drakkith said:See here: http://www.askmar.com/ConferenceNotes/2006-9%20IAC%20Paper.pdf
1.Temperature is not a factor in an IEC method. The driving voltage simply needs to be high enough for the ions to have enough energy upon collision to fuse. (You can use the velocity of the ions as temp, but that isn't counting the electrons and such.) They used a gas puff method to deliver Deuterium to the device, and I do not know the pressure of the plasma.
2. The injected electrons are subjected to many collisions with other electrons and ions, plus interactions with the magnetic and electric field of the Magrid itself. They most definitely take random directions in the well.
3. I'm not sure I understand what you are asking. The magnetic field from the grid confines the electrons in the well, and any that escape are attracted back to the device by the positive voltage on the grid.
4. The WB-6, the final test device in that PDF, was a couple of feet across or so. I can only estimate it based on the pictures of the device.
5. Of course. The injected electrons immediately start to interact with existing electrons and ions and with the electric and magnetic fields from the grid. I'm not sure on the 2 beam instability thing though.
6. The electron well was about 1 foot in diameter I believe. Again, just an estimate based on the descriptions and data I've seen. I haven't seen any specific label for the well diameter.
Joseph Chikva said:I think you are mistaken and ions with low density and temperature of even a few Ev-s will have very big free run (average run of particle from one collision before another collision). And no collision = fusion, but a lot of collisions and one fusion event. So, you need very-very big reactor if the depth of potential well will not be big enough.
And depth of potential well is an energy and not a size.
I only would like to say that you are mistaken (some mistakes) during explanation of Polywell's working principle.Drakkith said:Ah, sorry for the incorrect terminology.
I don't know the details of the well depth and free run and such. I don't remember reading anything on those.
What exactly does free run for electrons and ions decide in regards to a fusion reactor of this design?
Joseph Chikva said:I only would like to say that you are mistaken (some mistakes) during explanation of Polywell's working principle.
During the explanation when you talk about potencial well you told me about sizes.Drakkith said:Which ones?
Joseph Chikva said:During the explanation when you talk about potencial well you told me about sizes.
To me is very difficult to explain you something. From one side my knowledge on Polywell is very limited, from another I should explain you what is e.g. the potential well cosists of.
I can not sorry.
I only catched that in Polywell are two groups of electrons interacting each other with different arranged velocities: nonzero and zero. So, conditions for two-stream instability.
Take a look at a link: http://www.fpgeneration.com/technology/index.htmlDrakkith said:Take a look at the article I linked above and the wikipedia article on the polywell. That explains it all. The article MIGHT be in another language other than english, so if english isn't your 1st language then maybe that will help. Sorry I can't explain it to you!
One of the major obstacles that limits the fusion output in IEC devices is the result of repulsive electrostatic forces arising from the ions themselves.