### Abstract

The space-charge-limiting current problem is investigated for a magnetized particle beam propagating in a cylindrical drift tube and in the presence of a waveguide mode. It is shown that with a proper choice of a waveguide mode, the limiting current can be greatly enhanced due to ponderomotive effects. Physically, this is accomplished by using the ponderomotive energy to reduce the potential depression due to the beam's self-space-charge field. Formulas for the limiting current as a function of beam energy and waveguide RF field for solid and hollow beams are derived. It is found from these formulas that in appropriate parameter regimes, the space charge limiting current of, say, a 250-kV beam can be enhanced by 70%.

Original language | English |
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Title of host publication | Proceedings of the 1987 IEEE Particle Accelerator Conference: Accelerator Engineering and Technology |

Editors | Eric R. Lindstrom, Louise S. Taylor |

Publisher | IEEE Press |

Pages | 1093-1095 |

Number of pages | 3 |

Publication status | Published - 1987 |

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### ASJC Scopus subject areas

- Engineering(all)

### Cite this

*Proceedings of the 1987 IEEE Particle Accelerator Conference: Accelerator Engineering and Technology*(pp. 1093-1095). IEEE Press.

**Ponderomotive Enhancement of Charged Particle Beam Limiting Current.** / Grebogi, Celso; Uhm, Han S.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*Proceedings of the 1987 IEEE Particle Accelerator Conference: Accelerator Engineering and Technology.*IEEE Press, pp. 1093-1095.

}

TY - GEN

T1 - Ponderomotive Enhancement of Charged Particle Beam Limiting Current

AU - Grebogi, Celso

AU - Uhm, Han S.

PY - 1987

Y1 - 1987

N2 - The space-charge-limiting current problem is investigated for a magnetized particle beam propagating in a cylindrical drift tube and in the presence of a waveguide mode. It is shown that with a proper choice of a waveguide mode, the limiting current can be greatly enhanced due to ponderomotive effects. Physically, this is accomplished by using the ponderomotive energy to reduce the potential depression due to the beam's self-space-charge field. Formulas for the limiting current as a function of beam energy and waveguide RF field for solid and hollow beams are derived. It is found from these formulas that in appropriate parameter regimes, the space charge limiting current of, say, a 250-kV beam can be enhanced by 70%.

AB - The space-charge-limiting current problem is investigated for a magnetized particle beam propagating in a cylindrical drift tube and in the presence of a waveguide mode. It is shown that with a proper choice of a waveguide mode, the limiting current can be greatly enhanced due to ponderomotive effects. Physically, this is accomplished by using the ponderomotive energy to reduce the potential depression due to the beam's self-space-charge field. Formulas for the limiting current as a function of beam energy and waveguide RF field for solid and hollow beams are derived. It is found from these formulas that in appropriate parameter regimes, the space charge limiting current of, say, a 250-kV beam can be enhanced by 70%.

UR - http://www.scopus.com/inward/record.url?scp=0023598949&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:0023598949

SP - 1093

EP - 1095

BT - Proceedings of the 1987 IEEE Particle Accelerator Conference: Accelerator Engineering and Technology

A2 - Lindstrom, Eric R.

A2 - Taylor, Louise S.

PB - IEEE Press

ER -