POP Nameplate
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter UniPHY Group iResearch App Facebook

Physics of Plasmas / Volume 15 / Issue 5 / INVITED PAPERS / Lasers, Particle Beams, Accelerators, Radiation Generation

Phys. Plasmas 15, 056707 (2008); doi:10.1063/1.2884041 (8 pages)

Time-dependent imaging of space-charge dominated electron beams a

a Paper Q12, 2, Bull. Am. Phys. Soc. 52, 270 (2007).
K. Tian, R. A. Kishek, P. G. O’Shea, R. B. Fiorito, D. W. Feldman, and M. Reiser

Institute for Research in Electronics and Applied Physics, University of Maryland, College Park, Maryland 20742, USA

View MapView Map

(Received 15 November 2007; accepted 25 January 2008; published online 20 March 2008)

When considered as non-neutral plasmas, space-charge dominated charged particle beams have significantly smaller Debye lengths than their beam sizes. Therefore, collective effects due to space-charge forces are very important to the beam dynamics. As an example, density perturbations generated in a space-charge dominated charge particle beam will stimulate longitudinally space-charge waves. To study the modification of transverse beam distributions by longitudinal beam dynamics, experimental studies of low-energy electron beams, with and without longitudinal density perturbations, have been undertaken at the University of Maryland’s electron ring and the Long Solenoid Experiment (LSE). We have taken time-resolved beam images on these machines using two different diagnostics: Optical transition radiation, produced from an intercepting aluminized silicon screen, and a fast (<3 ns decay time) phosphor screen. Results from both techniques show that both the transverse size and transverse particle distribution of a space-charge dominated beam are affected by the longitudinal dynamics of the beam. In addition to the fast imaging measurements, longitudinal mean energy profiles of different beams have also been measured at different locations in the LSE system.

© 2008 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL SYSTEMS
    1. University of Maryland Electron Ring
    2. Long solenoid experiment system
  3. EXPERIMENTAL RESULTS
    1. Generating initial density modulations
    2. Fast imaging using OTR in UMER
    3. Fast imaging and mean energy measurement in LSE
      1. Parabolic beam
      2. Rectangular beam with perturbation
      3. Mean energy measurement
  4. CONCLUSIONS

RELATED DATABASES

To view database links for this article, you need to log in.

KEYWORDS and PACS

Keywords

electron beams, plasma diagnostics, plasma-beam interactions, space charge waves

PACS

  • 41.75.Fr

    Electron and positron beams

  • 52.40.Mj

    Particle beam interactions in plasmas

ARTICLE DATA

Permalink
http://link.aip.org/link/doi/10.1063/1.2884041

PUBLICATION DATA

ISSN:

1070-664X (print)  
1089-7674 (online)

Publisher:

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    R. F. Welton, M. P. Stockli, and S. N. Murray, Rev. Sci. Instrum. 75, 1793 (2004)RSINAK000075000005001793000001.

    D. H. Dowell, S. Joly, A. Loulergue, J. P. de Brion, and G. Haouat, Phys. Plasmas 4, 3369 (1997)PHPAEN000004000009003369000001.

    J. R. Harris, J. G. Neumann, K. Tian, and P. G. O'Shea, Phys. Rev. E 76, 026402 (2007).

    Y. Zou, Y. Cui, M. Reiser, and P. G. O'Shea, Phys. Rev. Lett. 94, 134801 (2005).

    D. Stratakis, K. Tian, R. A. Kishek, I. Haber, M. Reiser, and P. G. O'Shea, Phys. Plasmas 14, 120703 (2007)PHPAEN000014000012120703000001.

    J. G. Wang, D. X. Wang, and M. Reiser, Phys. Rev. Lett. 71, 1836 (1993).

    J. G. Wang and M. Reiser, Phys. Plasmas 5, 2064 (1998)PHPAEN000005000005002064000001.

    K. Tian, Y. Zou, Y. Cui, I. Haber, R. A. Kishek, M. Reiser, and P. G. O'Shea, Phys. Rev. ST Accel. Beams 9, 014201 (2006).

    P. K. Roy, S. S. Yu, and A. Anders et al., Phys. Rev. Lett. 95, 234801 (2005).

    R. B. Fiorito and D. W. Rule, AIP Conf. Proc. 319, 21 (1994)APCPCS000319000001000021000001.

    Y. Cui, Y. Zou, A. Valfells, M. Walter, I. Haber, R. A. Kishek, S. Bernal, M. Reiser, and P. G. O'Shea, Rev. Sci. Instrum. 75, 2736 (2004)RSINAK000075000008002736000001.

    Y. Zou, Y. Cui, V. Yun et al., Phys. Rev. ST Accel. Beams 5, 072801 (2002).

    Y. Zou, Y. Cui, I. Haber, M. Reiser, and P. G. O'Shea, Phys. Rev. ST Accel. Beams 6, 112801 (2003).


For access to citing articles, you need to log in.


Figures (10)

Access to article objects (figures, tables, multimedia) requires a subscription; log in to view available files.
(Access to supplementary files, where available, is free for this journal.)



Close

Google Calendar

ADVERTISEMENT

Your Recent History Recent History Help

Recently Viewed

  1. Time-dependent imaging of space-charge dominated electron beams
Go to AIP Home
Copyright © American Institute of Physics
close