Reply To: Proliferation?

[Joseph Chikva]

jamesr wrote: I’ll leave you to figure out the magnetic field you need to contain that at a beta of less than 1.
Even if the pressure was highly anisotropic so the radial part was only a few percent of the total, the required toroidal field would be impossible to create on that scale.

Unlike TOKAMAK we need not the toroidal field stronger than poloidal at the surface of plasma (beam). Yes, in TOKAMAK the ratio of these two parameters has 50 order.
As:

For a current stream to retain its form as a beam, in which the longitudinal velocity exceeds the transverse velocity and also avoid ‘kink’ instability, it is necessary that v<<y.

COLLECTIVE AND COHERENT METHODS OF PARTICLE ACCELERATION, J. D. LAWSON, Rutherford Laboratory, Chilton, Berkshire, England
http://cdsweb.cern.ch/record/1107899/files/p21.pdf

And electron’s y in fixed frame of reference and ion-electron y is about 80.
The case when Budker’s parameter v=1 corresponds to linear density 3.6E14 m^-1 and electron current ~17’000A. And for demo reactor I am proposing only 4’000A (v=~0,25<<80)
Also Budker considers electron component in the Stabilized Relativistic Electron Beam as flexible rod with certain rigidness around and in potential well of which the ions’ beams move. And relatively weak longitudinal mag field only should improve the rigidity.
We will have poloidal field at the surface of combined beam ~17T and there also would be enough to create “weak” toroidal field ~4T without using superconducting magnets.
As similarity of mag fields configuration with TOKAMAK does not mean that all criterions (limits) written for TOKAMAK (Kruskal-Shafranov, Troyon, etc) would be applicable for proposed Concept as well.
• Plasma in TOKAMAK is quazineutral unlike the Concept.
• There are not in TOKAMAK high relativistic electrons unlike the Concept.
• Bremsstrahlung in TOKAMAK is not considered as one of stabilizing factors unlike the Concept.
• Temperature in Concept at least on order of magnitude lower than in TOKAMAK.
• Etc.