Fusor Forums

I think it’s generally agreed that the fluorinert fluids are environmentally unfriendly, but they are used in such small amounts that it is also generally agreed that they are not a significant problem. I think their astronomical cost will insure that they are never used in sufficient quantity to co...

Behlke (Behlke.com) uses a sealed closed loop fluorinated fluid system to cool and insulate their HV pulse switches. They use a pump which is sold for cooling computer CPU’s. There are a large number of different pumps sold for this purpose largely to the high performance gaming community. This woul...

I tried to upload some short video clips of the plasma tube demonstrations, but the file sizes were too large even for clips of a few seconds.

I admire your drive, but drive must be tempered by reality. I read your link to the source for isotope enriched boron trifluoride. That this material is commercially available is not a surprise, but I would be willing to bet: 1. It will boggle your mind what this material sells for, and 2. Even if y...

Science is iterative. The first tokamaks were small, but they were a quantum leap in confinement at the time. GOLEM/CASTOR/TM-1 has a toroid not much more than a meter diameter. As more was learned about confinement, it was realized that larger and larger machines would be required. The Europeans in...

Very interesting video; thanks for posting. The video shows the Soviet tokamak 3. This brings to mind that its predecessor, TM-1, is still operating in Prague. It was first moved to the Czech Institute for Plasma Physics and renamed CASTOR. It was subsequently replaced there by a larger machine and ...

Shumlak’s group at the University of Washington have been using an array of plastic scintillation detectors to detect neutrons in their sheared z-pinch experiment. A paper on the detector has just been posted online (https://authors.elsevier.com/c/1ZnJdcPqbanWj) in Nuclear Instruments and Methods A....

Roberto, are you referring to continuous dynode or discrete dynode multipliers. I have successfully rejuvenated discrete dynode (beryllium copper) multipliers by a variation of the method you describe, but not channeltrons. For discrete dynode multipliers, the process is essentially a cleaning. Inde...

In regard to the EM discussion, I think an EM will be required for a home built ion trap RGA. I don’t think one could get enough ion current out of the trap to detect with just a Faraday cup. There have been reports of rejuvenating continuous dynode multipliers (e.g. Channeltrons), but I was never s...

The original publication is: An electrostatic autoresonant ion trap mass spectrometer A. V. Ermakov, and B. J. Hinch Review of Scientific Instruments 81, 013107 (2010); https://doi.org/10.1063/1.3276686 It includes the circuit diagrams. The Kimball Physics eV parts are indeed quite expensive. An ama...