Use of a grid-structured photocathode to essentially improve temporal resolution in streak tubes

Dmitry E. Greenfield

doi:10.1117/12.567123

17 March 2005 Use of a grid-structured photocathode to essentially improve temporal resolution in streak tubes

Dmitry E. Greenfield

Proceedings Volume 5580, 26th International Congress on High-Speed Photography and Photonics; (2005) https://doi.org/10.1117/12.567123
Event: 26th International Congress on High-Speed Photography and Photonics, 2004, Alexandria, Virginia, United States

Abstract

The principle limitation of the temporal resolution in the streak tubes is the first-order temporal aberration rising from the initial energy spread of the photoelectrons. The conventional way to reduce this aberration lays in increasing the near-cathode electric field. However the danger of electric breakdown leads to practical limitation of the field strength and, in its turn, the temporal resolution. Another approach to the problem consists in using a fine-mesh structured photocathode instead of a solid one. The paper presents calculations, both analytical and numerical, which have allowed estimation of required mesh parameters. As the needed mesh period is rather small, the approach under consideration could be hardly brought into practice until the nowadays advance in microelectronics and micromechanics.

Citation Download Citation

Dmitry E. Greenfield "Use of a grid-structured photocathode to essentially improve temporal resolution in streak tubes", Proc. SPIE 5580, 26th International Congress on High-Speed Photography and Photonics, (17 March 2005); https://doi.org/10.1117/12.567123

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