Collective Motional Resonances and Instabilities of an Electron Cloud Stored in a Penning Trap

Abstract

We have experimentally investigated the behaviour of an electron cloud confined in a Penning trap at weak superimposed magnetic fields. Exciting the motional frequencies of the electrons by an external drive field we found the axial mode split into two components which were identified as center-of-mass and individual electron oscillations. When the trapping potential was varied. rapid electron loss appeared at numerous values of the applied voltage. They are determined by the relation n( sub z) ohm (sub z) + n(sub m) ohm (sub m) = ohm(sub c), ohm(sub z), ohm(sub m), ohm(sub c) are the axial, magnetron, and cyclotron frequency of the trapped electrons, respectively. The reason for this loss is attributed to higher order contributions to the ideal quadrupole trapping potential.

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Document Details

Document Type
Technical Report
Publication Date
Jun 24, 2002
Accession Number
ADP012533

Entities

People

  • C. Angelescu
  • Debopriyo Biswas
  • P. Paasche
  • S. Ananthamurthy
  • T. Valenzuela

Organizations

  • Bengaluru University

Tags

Communities of Interest

  • C4I
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Amplitude
  • Circuits
  • Cyclotrons
  • Detection
  • Electrodes
  • Electrons
  • Excitation
  • Free Electrons
  • Frequency
  • High Resolution
  • Instability
  • Ion Traps
  • Lc Circuits
  • Magnetic Fields
  • Resonant Circuits
  • Space Charge
  • Voltage

Fields of Study

  • Physics

Readers

  • Marine Ecotoxicology
  • Materials Science and Engineering.
  • Pulsed Power and Plasma Physics.

Technology Areas

  • Microelectronics