Drag Instability in the Modified Betatron.
NAVAL RESEARCH LAB WASHINGTON DC
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The instability discussed in this report is a special case of the resistive wall instability. It occurs when the beam current, that propagates inside a resistive vacuum chamber along an external toroidal magnetic field, exceeds a critical value. The drag instability is characterized by uniform density in the direction of propagation, i.e., the toroidal wave number is zero. The authors have studied the drag instability over a wide range of parameters, including the limit theta greater than b-a where delta is the skin depth and b-a is the thickness of the conducting wall. This limit is relevant to the proof-of-principle experiment on the modified betratron accelerator presently under design at the Naval Research Laboratory. Author
- Numerical Mathematics
- Particle Accelerators