Timeline for Nuclear fusion : ion vs atom fusion cross section?
Current License: CC BY-SA 3.0
15 events
| when toggle format | what | by | license | comment | |
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| S Sep 6, 2012 at 0:44 | history | bounty ended | BarsMonster | ||
| S Sep 6, 2012 at 0:44 | history | notice removed | BarsMonster | ||
| Sep 6, 2012 at 0:44 | vote | accept | BarsMonster | ||
| Sep 3, 2012 at 15:12 | answer | added | Alan Rominger | timeline score: 5 | |
| Sep 1, 2012 at 13:15 | history | edited | BarsMonster | CC BY-SA 3.0 |
edited title
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| Sep 1, 2012 at 7:10 | answer | added | Jim Graber | timeline score: 1 | |
| Aug 31, 2012 at 21:35 | answer | added | Shaktyai | timeline score: 1 | |
| S Aug 30, 2012 at 23:43 | history | bounty started | BarsMonster | ||
| S Aug 30, 2012 at 23:43 | history | notice added | BarsMonster | Draw attention | |
| Aug 29, 2012 at 5:29 | comment | added | Ron Maimon | @AlanSE: In principle, you could slam negatively ionized H-type atom with bare H isotope nuclei, and then the first leg of the coulomb repulsion is actually attraction. The issue is that H- is a very unstable ion, and there is no way you won't eject that electron in a hot environment. | |
| Aug 29, 2012 at 0:00 | history | tweeted | twitter.com/#!/StackPhysics/status/240599875937529856 | ||
| Aug 28, 2012 at 23:37 | comment | added | Alan Rominger | I see this question was more sophisticated than I took it for. The Iter parameters are designed to achieve fusion with the ion-ion cross sections, so it seems very weird to cite that as a reason it might not work. It would be an oversight to mess those up. I don't know that the question leads to a good alternative either, an economic reactor design that can slam those nuclei together (with or without their electrons in tow) is the central challenge. Aside from maybe some inertial confinements, all hot-fusion designs I can think of slam ions and not atoms. | |
| Aug 28, 2012 at 21:12 | comment | added | BarsMonster | Lots of options: Accelerate first then neutralize for example, ITER does have 'neutral beam injectors'. But you surely cannot contain fast neutral atoms in a tokamak. | |
| Aug 28, 2012 at 20:20 | comment | added | Alan Rominger | Iter attains fusion within a plasma. The very definition of a plasma is that the gas is ionized (fully ionized at Iter energies). It sounds reasonable that atoms accelerated toward each other could have a lower cross-section because Coulomb repulsion (putting aside screening) won't happen until the electron orbitals start interacting, but how would you accelerate them in the first place if they don't have a charge?! | |
| Aug 28, 2012 at 20:09 | history | asked | BarsMonster | CC BY-SA 3.0 |