Enhanced lifetime hybrid-diffuser cesium reservoir photocathode

Montgomery, Eric; Pan, Zhigang; Riddick, Blake; O’Shea, P.G.; Feldman, D. W.; Jensen, Kevin L.; Ives, R. Lawrence; Falce, Lou

doi:10.1063/1.4788991

Cited by 12 publications

(3 citation statements)

References 7 publications

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“…The chamber pressure while mapping is 3 Â 10 À10 Torr. The spatially averaged QE is about half that corresponding to the ideal cesium submonolayer work function minimum [13].…”

Section: Methodsmentioning

confidence: 89%

Photocathode quantum efficiency mapping at high resolution using a digital micromirror device

Riddick

Montgomery

Fiorito

et al. 2013

Phys. Rev. ST Accel. Beams

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An electron beam's quality is fundamentally limited by its attributes at the cathode. The emission from photocathodes can be bright, but not necessarily uniform. Quantum efficiency (QE) maps generated by selectively illuminating the cathode surface reveal this nonuniformity. In this paper a proof-of-principle experiment is described in which a high resolution map of the QE is generated using a digital micromirror device. We show a substantial improvement over the best results reported for laser raster scanning.

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“…The chamber pressure while mapping is 3 Â 10 À10 Torr. The spatially averaged QE is about half that corresponding to the ideal cesium submonolayer work function minimum [13].…”

Section: Methodsmentioning

confidence: 89%

Photocathode quantum efficiency mapping at high resolution using a digital micromirror device

Riddick

Montgomery

Fiorito

et al. 2013

Phys. Rev. ST Accel. Beams

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show abstract

“…This is a 2.5 cell X-band gun with a magnetized cathode in order to use the flat-beam-transform technique and obtain flat beams to match the slab-geometry dielectric structure which will provide the main acceleration. Finally, T. E. Montgomery showed the possibility to enhance the lifetime of the hybrid diffuser cesium reservoir photocathode [7]. By properly treating the surface it is possible to recover up to 90 % of the initial QE.…”

Section: Electron Sourcesmentioning

confidence: 99%

Summary report of Working Group 5: Beam and radiation generation, monitoring and control

Musumeci¹,

Tilborg²

2013

AIP Conference Proceedings

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“…The potential for photocathodes was demonstrated by recent experiments at the University of Maryland, where the lifetime of cesiated tungsten photocathodes was increased by more than two orders of magnitude [3]. Photocathode lifetime is a major issue for electron guns using laser initiated electron emission.…”

Section: Introductionmentioning

confidence: 99%