Bi-alkali antimonide photocathodes for high brightness accelerators

S. Schubert; M. Ruiz-Osés; I. Ben-Zvi; T. Kamps; X. Liang; E. Muller; K. Müller; H. Padmore; T. Rao; X. Tong; T. Vecchione; J. Smedley

doi:10.1063/1.4821625

Bi-alkali antimonide photocathodes for high brightness accelerators

S. Schubert
, M. Ruiz-Osés
, I. Ben-Zvi
, T. Kamps
, X. Liang
, E. Muller
, K. Müller
, H. Padmore
, T. Rao
, X. Tong
, T. Vecchione
, J. Smedley

Physics and Astronomy

Helmholtz Centre Berlin for Materials and Energy
Brookhaven National Laboratory
Stony Brook University
University of Groningen
Lawrence Berkeley National Laboratory
SLAC National Accelerator Laboratory

Research output: Contribution to journal › Article › peer-review

57 Scopus citations

Abstract

Alkali-antimonide photocathodes were grown on Si(100) and studied by means of XPS and UHV-AFM to validate the growth procedure and morphology of this material. The elements were evaporated sequentially at elevated substrate temperatures (first Sb, second K, third Cs). The generated intermediate K-Sb compound itself is a photocathode and the composition of K_2.4Sb is close to the favored K₃Sb stoichiometry. After cesium deposition, the surface layer is cesium enriched. The determined rms roughness of 25 nm results in a roughness domination of the emittance in the photoinjector already above 3 MV/m.

Original language	English
Article number	032119
Journal	APL Materials
Volume	1
Issue number	3
DOIs	https://doi.org/10.1063/1.4821625
State	Published - Sep 2013

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10.1063/1.4821625

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abstract = "Alkali-antimonide photocathodes were grown on Si(100) and studied by means of XPS and UHV-AFM to validate the growth procedure and morphology of this material. The elements were evaporated sequentially at elevated substrate temperatures (first Sb, second K, third Cs). The generated intermediate K-Sb compound itself is a photocathode and the composition of K2.4Sb is close to the favored K3Sb stoichiometry. After cesium deposition, the surface layer is cesium enriched. The determined rms roughness of 25 nm results in a roughness domination of the emittance in the photoinjector already above 3 MV/m.",

author = "S. Schubert and M. Ruiz-Os{\'e}s and I. Ben-Zvi and T. Kamps and X. Liang and E. Muller and K. M{\"u}ller and H. Padmore and T. Rao and X. Tong and T. Vecchione and J. Smedley",

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T1 - Bi-alkali antimonide photocathodes for high brightness accelerators

AU - Schubert, S.

AU - Ruiz-Osés, M.

AU - Ben-Zvi, I.

AU - Kamps, T.

AU - Liang, X.

AU - Muller, E.

AU - Müller, K.

AU - Padmore, H.

AU - Rao, T.

AU - Tong, X.

AU - Vecchione, T.

AU - Smedley, J.

PY - 2013/9

Y1 - 2013/9

N2 - Alkali-antimonide photocathodes were grown on Si(100) and studied by means of XPS and UHV-AFM to validate the growth procedure and morphology of this material. The elements were evaporated sequentially at elevated substrate temperatures (first Sb, second K, third Cs). The generated intermediate K-Sb compound itself is a photocathode and the composition of K2.4Sb is close to the favored K3Sb stoichiometry. After cesium deposition, the surface layer is cesium enriched. The determined rms roughness of 25 nm results in a roughness domination of the emittance in the photoinjector already above 3 MV/m.

AB - Alkali-antimonide photocathodes were grown on Si(100) and studied by means of XPS and UHV-AFM to validate the growth procedure and morphology of this material. The elements were evaporated sequentially at elevated substrate temperatures (first Sb, second K, third Cs). The generated intermediate K-Sb compound itself is a photocathode and the composition of K2.4Sb is close to the favored K3Sb stoichiometry. After cesium deposition, the surface layer is cesium enriched. The determined rms roughness of 25 nm results in a roughness domination of the emittance in the photoinjector already above 3 MV/m.

UR - https://www.scopus.com/pages/publications/84899999858

U2 - 10.1063/1.4821625

DO - 10.1063/1.4821625

M3 - Article

AN - SCOPUS:84899999858

SN - 2166-532X

VL - 1

JO - APL Materials

JF - APL Materials

IS - 3

M1 - 032119

ER -

Bi-alkali antimonide photocathodes for high brightness accelerators

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