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Title: Cold electron beams from cryocooled, alkali antimonide photocathodes

Abstract

In this study we report on the generation of cold electron beams using a Cs3Sb photocathode grown by codeposition of Sb and Cs. By cooling the photocathode to 90 K we demonstrate a significant reduction in the mean transverse energy validating the long-standing speculation that the lattice temperature contributes to limiting the mean transverse energy or intrinsic emittance near the photoemission threshold, opening new frontiers in generating ultrabright beams. At 90 K, we achieve a record low intrinsic emittance of 0.2 μm (rms) per mm of laser spot diameter from an ultrafast (subpicosecond) photocathode with quantum efficiency greater than 7 × 10-5 using a visible laser wavelength of 690 nm.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1227526
Alternate Identifier(s):
OSTI ID: 1240854
Grant/Contract Number:  
SC0014338
Resource Type:
Published Article
Journal Name:
Physical Review Special Topics. Accelerators and Beams
Additional Journal Information:
Journal Name: Physical Review Special Topics. Accelerators and Beams Journal Volume: 18 Journal Issue: 11; Journal ID: ISSN 1098-4402
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Cultrera, L., Karkare, S., Lee, H., Liu, X., Bazarov, I., and Dunham, B. Cold electron beams from cryocooled, alkali antimonide photocathodes. United States: N. p., 2015. Web. doi:10.1103/PhysRevSTAB.18.113401.
Cultrera, L., Karkare, S., Lee, H., Liu, X., Bazarov, I., & Dunham, B. Cold electron beams from cryocooled, alkali antimonide photocathodes. United States. https://doi.org/10.1103/PhysRevSTAB.18.113401
Cultrera, L., Karkare, S., Lee, H., Liu, X., Bazarov, I., and Dunham, B. Mon . "Cold electron beams from cryocooled, alkali antimonide photocathodes". United States. https://doi.org/10.1103/PhysRevSTAB.18.113401.
@article{osti_1227526,
title = {Cold electron beams from cryocooled, alkali antimonide photocathodes},
author = {Cultrera, L. and Karkare, S. and Lee, H. and Liu, X. and Bazarov, I. and Dunham, B.},
abstractNote = {In this study we report on the generation of cold electron beams using a Cs3Sb photocathode grown by codeposition of Sb and Cs. By cooling the photocathode to 90 K we demonstrate a significant reduction in the mean transverse energy validating the long-standing speculation that the lattice temperature contributes to limiting the mean transverse energy or intrinsic emittance near the photoemission threshold, opening new frontiers in generating ultrabright beams. At 90 K, we achieve a record low intrinsic emittance of 0.2 μm (rms) per mm of laser spot diameter from an ultrafast (subpicosecond) photocathode with quantum efficiency greater than 7 × 10-5 using a visible laser wavelength of 690 nm.},
doi = {10.1103/PhysRevSTAB.18.113401},
journal = {Physical Review Special Topics. Accelerators and Beams},
number = 11,
volume = 18,
place = {United States},
year = {Mon Nov 30 00:00:00 EST 2015},
month = {Mon Nov 30 00:00:00 EST 2015}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevSTAB.18.113401

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Cited by: 40 works
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