Instability of collapsing cylindrical shell during magnetic energy density
Abstract
A shaped explosive charge type magnetic field generator was used to produce a collapsing shell around a megagauss magnetic field. The initial shell diameter was 139 mm. The dynamics of the shell shape change was studied by transilluminating the magnetic shaped charge generator with bremsstrahlung from a nonferrous pulsed betatron. X-ray photographs taken perpendicular to the magnetic field generator axis show the collapse of the shell between 14.5 microseconds into the process, when the magnetic field in the 33 mm diameter cavity was 2.7 MGs and 16.7 microseconds, when the cavity diameter was 18 mm and the field in it was 6.2 MGs. This paper demonstrates for the first time that the instability of the motion of the internal surface of a shell compressed by an ultrastrong magnetic field limits the growth of the magnetic energy density.
- Publication:
-
USSR Rept Phys Math JPRS UPM
- Pub Date:
- April 1984
- Bibcode:
- 1984RpPhM........9P
- Keywords:
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- Cylindrical Shells;
- Flux Density;
- Magnetic Fields;
- Stability;
- Betatrons;
- Bremsstrahlung;
- Electric Generators;
- Communications and Radar