User talk:100.6.43.82

Hi, you made a number of edits to the colliding beam fusion article. One of these mentions Rosenblume calculating that the focussing energy is greater than the fusion energy. No support for this argument is given in the body of the article. Do you have a reference for this? Maury Markowitz (talk) 13:20, 25 May 2020 (UTC)

Hi Maury, This is Matt Moynihan, https://www.quora.com/profile/Matthew-J-Moynihan, you may not remember me, but we spoke over the phone a few years ago. I should have logged into my wikipedia account. I do not have a reference for the Rosenbluth calculation, but I need to find one. For as long as I can remember I have been told that a colliding beam fusion reactor will fail; that the energy is 100 to 1 against because the beams do not want to stay together. This is a reasonable statement given that ion beams are (+) and (+) and they like to fly apart. These were the reasons why MIGMA failed, why the colliding beam fusion reactor approach (promoted in France for the past 10 years) is poor idea, it is why AGNI and FP Generation and several other companies and teams will struggle to get to net. It is why the work of Andrew Chap at the University of Maryland did not bear fruit. It is basically the reason you cannot turn a cyclotron into a fusion reactor. That said I have no reference to speak of. Also, just because the default condition is 100 to 1 against does not preclude people from suggesting tricks or schemes to get around the problem. AGNI proposes to refocus beams using electrostatic lenses; FP Generation proposed that the ions in a beam would naturally bunch together. Apollo Fusion suggested that pulsing a voltage ring around the beams would drive up their density. These may only be little physical effects, not significant enough to overcome the beam coherence issue, I don't know, but I will try to research the topic further.

Hey Matt, I only saw your reply now! While hunting, can you find anything on MARBLE and MIX? I can't find mentions of either of these. Maury Markowitz (talk) 13:44, 29 July 2021 (UTC)

Hello Matt. I am a new contributor. My comments here relate to the article on Colliding Beam Fusion. In my view, a large question-mark continues to hang over the assertion that "it takes more energy to hold the beams together than what can be expected from their fusion reactions". I have not yet seen a convincing justification of that assertion. It does not automatically follow from the scatter rate being e.g. 100 times higher than the fusion rate. Neither does it automatically follow from the overall energy of the scattered particles being higher than the overall fusion energy. Prompted by your contribution, I searched through Rosenbluth's early publications. No joy. In the light of your statement two years ago that you "don't have a reference to speak of", I have taken the liberty of deleting your sentence about Rosenbluth from the article. — Preceding unsigned comment added by 2A00:23C8:8F84:3601:FD6C:BB64:D325:F45A (talk) 00:08, 2 August 2022 (UTC)