Effects of physical and chemical surface roughness on the brightness of electron beams from photocathodes

Gevorkyan, G.; Karkare, S.; Emamian, S.; Bazarov, I. V.; Padmore, H. A.

doi:10.1103/PhysRevAccelBeams.21.093401

Title: Effects of physical and chemical surface roughness on the brightness of electron beams from photocathodes

Journal Article · Fri Sep 14 00:00:00 EDT 2018 · Physical Review Accelerators and Beams

DOI:https://doi.org/10.1103/PhysRevAccelBeams.21.093401· OSTI ID:1470798

Gevorkyan, G.; Karkare, S.; Emamian, S.; Bazarov, I. V.; Padmore, H. A.

The performance of free electron laser x-ray light sources, and systems for ultrafast electron diffraction and ultrafast electron microscopy, is limited by the brightness of the electron sources used. The intrinsic emittance, or equivalently, the mean transverse energy (MTE) of electrons emitted from the photocathode determines the maximum possible brightness in such systems. With ongoing improvements in photocathode design and synthesis, we are now at a point where the physical and chemical surface roughness of the cathode can become a limiting factor. Here we show how measurements of the spatially dependent variations in height and surface potential can be used to compute the electron beam mean transverse energy (MTE), one of the key determining factors in evaluation of brightness.

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Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: KC0407-ALSJNT-I0013; AC02-05CH11231

OSTI ID:: 1470798

Alternate ID(s):: OSTI ID: 1478355

Journal Information:: Physical Review Accelerators and Beams, Journal Name: Physical Review Accelerators and Beams Vol. 21 Journal Issue: 9; ISSN 2469-9888

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 18 works

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References (19)

The transverse energy of electrons emitted from GaAs photocathodes Bradley, D. J.; Allenson, M. B.; Holeman, B. R. Journal of Physics D: Applied Physics, Vol. 10, Issue 1 https://doi.org/10.1088/0022-3727/10/1/013	journal	January 1977
Near atomically smooth alkali antimonide photocathode thin films Feng, Jun; Karkare, Siddharth; Nasiatka, James Journal of Applied Physics, Vol. 121, Issue 4 https://doi.org/10.1063/1.4974363	journal	January 2017
Thermal limit to the intrinsic emittance from metal photocathodes Feng, Jun; Nasiatka, J.; Wan, Weishi Applied Physics Letters, Vol. 107, Issue 13 https://doi.org/10.1063/1.4931976	journal	September 2015
Analytical study on emittance growth caused by roughness of a metallic photocathode Zhang, Zhe; Tang, Chuanxiang Physical Review Special Topics - Accelerators and Beams, Vol. 18, Issue 5 https://doi.org/10.1103/PhysRevSTAB.18.053401	journal	May 2015
Advances in bright electron sources Musumeci, P.; Giner Navarro, J.; Rosenzweig, J. B. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 907 https://doi.org/10.1016/j.nima.2018.03.019	journal	November 2018
Effects of Cathode Bumpiness on the Spatial Resolution of Proximity Focused Image Tubes Martinelli, Ramon U. Applied Optics, Vol. 12, Issue 8 https://doi.org/10.1364/AO.12.001841	journal	January 1973
First lasing and operation of an ångstrom-wavelength free-electron laser Emma, P.; Akre, R.; Arthur, J. Nature Photonics, Vol. 4, Issue 9 https://doi.org/10.1038/nphoton.2010.176	journal	August 2010
Ultrafast laser pulse heating of metallic photocathodes and its contribution to intrinsic emittance Maxson, J.; Musumeci, P.; Cultrera, L. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 865 https://doi.org/10.1016/j.nima.2016.08.032	journal	September 2017
Kelvin probe force microscopy and its application Melitz, Wilhelm; Shen, Jian; Kummel, Andrew C. Surface Science Reports, Vol. 66, Issue 1 https://doi.org/10.1016/j.surfrep.2010.10.001	journal	January 2011
High-precision calculation of quasistatic field near a photocathode surface microrelief Gorlov, Timofey Journal of Electrostatics, Vol. 65, Issue 12 https://doi.org/10.1016/j.elstat.2007.05.010	journal	November 2007
Effect of nanoscale surface roughness on transverse energy spread from GaAs photocathodes Karkare, Siddharth; Bazarov, Ivan Applied Physics Letters, Vol. 98, Issue 9 https://doi.org/10.1063/1.3559895	journal	February 2011
Scattering and the relationship between quantum efficiency and emittance Jensen, Kevin L. Journal of Applied Physics, Vol. 113, Issue 5 https://doi.org/10.1063/1.4790874	journal	February 2013
Monte Carlo charge transport and photoemission from negative electron affinity GaAs photocathodes Karkare, Siddharth; Dimitrov, Dimitre; Schaff, William Journal of Applied Physics, Vol. 113, Issue 10 https://doi.org/10.1063/1.4794822	journal	March 2013
Synchrotron x-ray study of a low roughness and high efficiency K ₂ CsSb photocathode during film growth Xie, Junqi; Demarteau, Marcel; Wagner, Robert Journal of Physics D: Applied Physics, Vol. 50, Issue 20 https://doi.org/10.1088/1361-6463/aa6882	journal	April 2017
Cold electron beams from cryocooled, alkali antimonide photocathodes Cultrera, L.; Karkare, S.; Lee, H. Physical Review Special Topics - Accelerators and Beams, Vol. 18, Issue 11 https://doi.org/10.1103/PhysRevSTAB.18.113401	journal	November 2015
4d Ultrafast Electron Diffraction, Crystallography, and Microscopy Zewail, Ahmed H. Annual Review of Physical Chemistry, Vol. 57, Issue 1 https://doi.org/10.1146/annurev.physchem.57.032905.104748	journal	May 2006
Quantum efficiency and thermal emittance of metal photocathodes Dowell, David H.; Schmerge, John F. Physical Review Special Topics - Accelerators and Beams, Vol. 12, Issue 7 https://doi.org/10.1103/PhysRevSTAB.12.074201	journal	July 2009
Emittance, surface structure, and electron emission Jensen, Kevin L.; Shiffler, Donald A.; Petillo, John J. Physical Review Special Topics - Accelerators and Beams, Vol. 17, Issue 4 https://doi.org/10.1103/PhysRevSTAB.17.043402	journal	April 2014
A computer simulation method for the calculation of equilibrium constants for the formation of physical clusters of molecules: Application to small water clusters Swope, William C.; Andersen, Hans C.; Berens, Peter H. The Journal of Chemical Physics, Vol. 76, Issue 1 https://doi.org/10.1063/1.442716	journal	January 1982

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Thermal-field and photoemission from meso- and micro-scale features: Effects of screening and roughness on characterization and simulation Jensen, Kevin L.; McDonald, Michael; Chubenko, Oksana Journal of Applied Physics, Vol. 125, Issue 23 https://doi.org/10.1063/1.5097149	journal	June 2019

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