jap banner
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter UniPHY Group iResearch App Facebook

Journal of Applied Physics / Volume 103 / Issue 5 / INTERDISCIPLINARY AND GENERAL PHYSICS

J. Appl. Phys. 103, 054901 (2008); doi:10.1063/1.2838209 (8 pages)

Thermal emittance and response time measurements of negative electron affinity photocathodes

Ivan V. Bazarov1, Bruce M. Dunham1, Yulin Li1, Xianghong Liu1, Dimitre G. Ouzounov1, Charles K. Sinclair1, Fay Hannon2, and Tsukasa Miyajima3

1Laboratory of Elementary Particle Physics, Cornell University, Ithaca, New York 14853, USA
2Lancaster University, Lancaster, United Kingdom
3Photon Factory, KEK, Tsukuba, Japan

View MapView Map

(Received 1 October 2007; accepted 29 November 2007; published online 3 March 2008)

The thermal emittance and temporal response of a photocathode set an upper limit on the maximum achievable electron beam brightness from a photoemission electron source, or photoinjector. We present measurements of these parameters over a broad range of laser wavelength for two different negative electron affinity (NEA) photocathodes. The thermal emittance of NEA GaAs and GaAsP has been measured by two techniques—a measurement of the beam size downstream from a solenoid, whose strength was varied, and a double slit transmission measurement—for different laser spot sizes and shapes. The effect of space charge on the beam spot size allows a good estimation of the photoemission response time from these cathodes. Both cathodes show a subpicosecond response for laser wavelengths shorter than 520 nm.

© 2008 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. THERMAL EMITTANCE
    1. Notations
    2. Experimental Setup
    3. Method
    4. Results
  3. PHOTOEMISSION RESPONSE
    1. Diffusion model
    2. Method
    3. Results
  4. DISCUSSION
  5. SUMMARY

RELATED DATABASES

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

KEYWORDS and PACS

Keywords

brightness, electron affinity, electron sources, gallium arsenide, gallium compounds, III-V semiconductors, photocathodes, photoemission, space charge

PACS

  • 85.60.Ha

    Photomultipliers; phototubes and photocathodes

ARTICLE DATA

Permalink
http://link.aip.org/link/doi/10.1063/1.2838209

PUBLICATION DATA

ISSN:

0021-8979 (print)  
1089-7550 (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.
    I. V. Bazarov and C. K. Sinclair, Phys. Rev. ST Accel. Beams 8, 034202 (2005).

    P. Hartmann, J. Bermuth, D. v. Harrach, J. Hoffmann, S. Kbis, E. Reichert, K. Aulenbacher, J. Schuler, and M. Steigerwald, J. Appl. Phys. 86, 2245 (1999)JAPIAU000086000004002245000001.

    S. Pastuszka, M. Hoppe, D. Kratzmann, D. Schwalm, A. Wolf, A. S. Jaroshevich, S. N. Kosolobov, D. A. Orlov, and A. S. Terekhov, J. Appl. Phys. 88, 6788 (2000)JAPIAU000088000011006788000001.

    N. Yamamoto, M. Yamamoto, M. Kuwahara, R. Sakai, T. Morino, K. Tamagaki, A. Mano, A. Utsu, S. Okumi, T. Nakanishi, M. Kuriki, C. Bo, T. Ujihara, and Y. Takeda, J. Appl. Phys. 102, 024904 (2007)JAPIAU000102000002024904000001.

    A. V. Aleksandrov, M. S. Avilov, R. Calabrese, G. Ciullo, N. S. Dikansky, V. Guidi, G. Lamanna, P. Lenisa, P. V. Logachov, A. V. Novokhatsky, L. Tecchio, and B. Yang, Phys. Rev. E 51, 1449 (1995).

    M. P. Stockli, R. F. Welton, and R. Keller, Rev. Sci. Instrum. 75, 1646 (2004)RSINAK000075000005001646000001.

    W. E. Spicer, Phys. Rev. 112, 114 (1958).


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


Figures (13) Tables (2)

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.)

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. Thermal emittance and response time measurements of negative electron affinity photocathodes
  2. Long‐Transient Effects in Lasers with Inserted Liquid Samples
  3. Space Charge Waves in Cylindrical Plasma Columns
  4. Nanocrystalline iron at high pressure
  5. Optical, structural, and magnetic properties of cobalt nanostructure thin films
Go to AIP Home
Copyright © American Institute of Physics
close