Read about fusion | 72 Discussions | Page 1

  1. prodigylock

    A What pressure would be needed to cause fusion of water?

    So in a DnD story, someone made a bomb by putting 3375ft^3 of water into a 0.5ft radius sphere and caused it to make a nuke. I was thinking if this was possible then what would actually happen, so I spent an afternoon looking for the answer and only got the pressure and density...
  2. hagopbul

    I What is hydrogen boron fusion

    Hello All: Read an article about new trend in fusion science about hydrogen-boron 11 fusion Called HB-11 fusion and a start up are doing a research on it using pulsed laser What I don't understand how it is considered a possible new method for energy production when we know hydrogen and...
  3. patrykh18

    Physics Internship possibilities: Plasma physics

    Hi guys. I'm a third year physics student. Next year I'll be in my final year. I'm interested in studying fusion in the future. Unfortunately I have not done plasma physics as part of my degree so I don't know much about it yet. However I'd like to do an internship abroad this summer. Ideally I...
  4. patrykh18

    Plasma physics project ideas

    Summary:: I am looking for topics to give a presentation on. Hi everyone. If this is in the wrong section feel free to move it. Anyway, as part of our lab course, on top of doing experiments we will also have to prepare a 20 minute presentation on a chosen topic on physics. This is not like...
  5. C

    I Can a fusion reaction propagate in a cappilary?

    Can fusion reaction propagate inside a (very thick walled) cappilary if fusion has been initiated at one end? In this situation it seems like all the energy would have nowhere to go but into heating and pressurizing the fuel, providing conditions for further reaction. I imagine this is a...
  6. N

    China's Experimental Advanced Superconducting Tokamak (EAST)

    A team of scientists from China's Institute of Plasma Physics announced this week that plasma in its Experimental Advanced Superconducting Tokamak (EAST) would be ready to begin attempting to generate more energy than it uses, in a world first. I am dubious about more news that comes out of...
  7. N

    B A New Way to Make Fusion Reactors More Efficient

    I am quite new to this site. I have been following this technology (fusion) for many years now. It never seems to be any closer to actual deployment. Do you think we are getting closer? What do you think are the major stumbling blocks? The article below I read today. My understanding is that...
  8. T

    New approach to stabilize fusion plasmas

    https://phys.org/news/2019-01-scientists-stabilizes-fusion-plasmas.html By applying more RF power to the unstable 'bubbles' that form in the plasmas.
  9. Basil Currie

    B Fusion of Hydrogen Isotopes

    Hi, Does a T-D or a D-D fusion release more energy? Even if D-D needs higher temperatures, would it produce more energy in a fusion reactor?
  10. N

    I Why do stars only produce up to iron and nickel

    I know it's a common question but I've found no answers online so far. My professor has made a point out of saying that fusion reactions after iron and nickel do release energy but just not enough to keep the star from imploding. This didn't make sense to me. How would fission release energy if...
  11. M

    I Trying to understand the entropy of different situations...

    I just read a book by nuclear physicist Carlo Rovelli on the subject of "Time" and he says that 'entropy' is the only non-reversible process in the basic equations of physics, and he believes time and entropy are related (if I understand him correctly). So this started me thinking on entropy...
  12. Javier Lopez

    A What is the key parameter in fusion: momentum or energy?

    The released products of a transmutation reaction (I say transmutation when 2 particles reacts to generate more than one) follows the conservation of kinetic energy law. Also particles moving in opposite direction can have equal speed one with respect the other than rather if one of them is...
  13. Javier Lopez

    I Stopping power for a proton ion gun through a Boron-11 sheet 1mm thick

    Hello, I need the stopping power for a proton ion gun through Boron-11 sheet 1mm thick. I have the following table obtained from here: https://www-nds.iaea.org/stopping/stopping_hydr.html Where the unit is in 1-15*eV*cm2/atom: Then I calculated for 600keV protons at table 5.1eV*cm2/atom. I...
  14. O

    A Positron Catalyzed Fusion

    Hi, I recently came across Positron Dynamics, a company working on a fusion propulsion system. You can watch this presentation given at Breakthrough Discuss 2018. They also got a grant from NIAC. Rather than trying to create and store positrons, they use Na-22 as a source. They also patented...
  15. J

    CNO fusion using particle accelerator?

    The CNO cycle (see https://en.wikipedia.org/wiki/CNO_cycle) is a catalytic fusion reaction that produces energy in stars larger than the sun. It converts four protons into a helium-4 nucleus using a cycle of carbon, nitrogen and oxygen isotopes as catalysts and releases 26.7 MeV of energy mostly...
  16. NikolaTesla2

    B Doubts in Calculating Nuclear Reactions

    I am not talking about the reactions of simple atoms in chemistry, I am speaking, for example deuterium, heavy water, isotopes of hydrogen, oxygen, carbon, etc.I would like to know how to calculate when two atoms merge, to know mathematically what atom will form, example deuterium + deuterium =...
  17. T

    B Neutron star collisions

    When neutron stars collide, heavy elements, such as gold, are created. Are these elements ejected from the system to be found, say, here on earth? Or do they fall back into the newly created black hole?
  18. T

    B Why don't high mass stars expand and cool?

    When a high mass star starts to fuse heavier elements, the core heats up the outer layers enough to for them to begin fusion of their own. My question is: because the star hasn't gained any mass, but it has increased in temperature a lot, why doesn't the star expand and cool like a red giant...
  19. Ryan Doucette

    A Nuclear Fusion: Electron Thermal Transport Terminology

    I am an undergrad physics major in my final semester currently taking Intro to Thermodynamics. As a final project, each student must choose a topic related to thermodynamics that is more advanced than what is covered in the curriculum and write a paper and present our findings to the class on...
  20. Sebastiaan

    A How to calculate the energy of Gamma rays in fusion

    Lets say you have your basic fusion reaction D + H → He3 + γ + 5.49 MeV Now exactly how much of the energy is carried away by the gamma ray and how much by the Alfa particle ?
  21. L

    Engineering Career advice to become a Fusion Engineer

    Hello, I am posting to get some career advice about pursuing a career in fusion physics/engineering. With the construction of ITER in France and all the worldwide research into fusion as an energy source, I am extremely interested in the field and I want to help develop fusion technology. I am...
  22. V

    B Schrödinger Equation for the fusion of Deuterium(2H) and a Proton(H)

    In fact I am not sure if this is the right place to ask such a question but I'm gonna ask anyways, just tell me if im in the wrong place. So I doing a little experiment with the Schröndinger's equation, but the problem is I can't find a certain function. You all know the Schrödingers equation...
  23. R

    Is the Hohlraum the Key to Fusion Energy?

    The Threshold to Fusion Energy I'd like to start some conversation on Hohlraum design, particularly on the opportunity to construct a fullerene capsule as the ignition chamber for indirect-drive fusion. Given more than two decades of evolution in hohlraum configuration* there are many...
  24. chandrahas

    Lockheed's compact fusion reactor question

    Magnetic mirrors were thought to be a viable solution for fusion power. But then, we found out that most of the plasma would simply escape. Is this right? So, then we realized that this method might not work. So after many years, Lockheed has come up with a similar model. Lockheeds model is...
  25. chandrahas

    How do tokamaks extract helium from the fusion plasma?

    If tokamaks were to be run continuously, somehow, then fusion would produce a lot of helium. But since the charge to mass ratio of helium is exactly the same as deuterium, both of them behave almost exactly he same in electric or magnetic fields. And tritium on the other hand has a lower charge...
  26. E

    The difference between the first wall and plasma-facing

    I have read an article talking about material research in fusion. One part in the context is divided into three aspects about the material capable of using in a fusion power reactor. Material selection in the first wall and plasma-facing components are two of the aspects. But it does not mention...
  27. rebc

    Tokamaks and plasma confinement

    I have the fundamental understanding of how tokamaks work. Now, why is it not ideal to confine plasmas using a z- or theta- pinch configurations?
  28. chandrahas

    A What is wrong with particle acceleration based fusion?

    Recently, I was thinking about fusion and this thought struck my mind. In tokamaks, the plasma is heated to extremely high temperatures in order to supply enough energy to the ions for them to fuse. But since, the plasma follows a boltzmann maxwell distribution curve,only a few ions have have...
  29. chandrahas

    I How large is the collision cross section compared to nuclear fusion cross section

    Most Fusion reactors, and the leading ones like JET, use high temp. plasma and confine it. So, the plasma would approximate the Maxwell- Boltzmann distribution. This means that only a small portion of the plasma has enough energy to fuse. But, collisions are much more often, right? Since not all...
  30. Klupa

    B Fission/fusion vs radiation

    Why does fission/fusion occur instead of alpha/beta/gamma radiation?
Top