Experimental results from a DC photocathode electron gun for an IR FEL

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A 350 keV DC photocathode gun capable of delivering the high-brightness CW electron beam necessary for Jefferson Lab`s infrared free-electron laser is described. The gun is to be used with a superconducting radiofrequency linac operating at 1.497 GHz and is mode-locked to the 40th subharmonic of the fundamental using a Nd:YLF drive laser. The gun provides 20--25 ps bunches at up to 135 pC/bunch. Experimental measurements of transverse and longitudinal beam properties are presented. Transverse emittance is measured using a slit-wire scanner emittance meter, and energy spread is measured using the slit and a spectrometer magnet. Longitudinal emittance is measured ... continued below

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2 p.

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Kehne, D.; Engwall, D.; Legg, R. & Shinn, M. October 1, 1997.

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Description

A 350 keV DC photocathode gun capable of delivering the high-brightness CW electron beam necessary for Jefferson Lab`s infrared free-electron laser is described. The gun is to be used with a superconducting radiofrequency linac operating at 1.497 GHz and is mode-locked to the 40th subharmonic of the fundamental using a Nd:YLF drive laser. The gun provides 20--25 ps bunches at up to 135 pC/bunch. Experimental measurements of transverse and longitudinal beam properties are presented. Transverse emittance is measured using a slit-wire scanner emittance meter, and energy spread is measured using the slit and a spectrometer magnet. Longitudinal emittance is measured using a combination of sampling aperture, kicker cavity, slit and spectrometer. Measurements for bunch charges of 135 pC are described and compared with simulations.

Physical Description

2 p.

Notes

INIS; OSTI as DE98000365

Source

  • FEL `97: international free electron laser conference and 4. free electron laser users` workshop, Beijing (China), 18-22 Aug 1997

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  • Other: DE98000365
  • Report No.: DOE/ER/40150--1174
  • Report No.: JLAB-ACP--97-09;CONF-970885--
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 541916
  • Archival Resource Key: ark:/67531/metadc696847

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  • October 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Aug. 3, 2016, 9:12 p.m.

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Kehne, D.; Engwall, D.; Legg, R. & Shinn, M. Experimental results from a DC photocathode electron gun for an IR FEL, article, October 1, 1997; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc696847/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.