IPAC2012 - List of Authors (Xue, L.)

Paper	Title	Page
MOPPP041	Effect of Roughness on Emittance of Potassium Cesium Antimonide Photocathodes	655
	T. Vecchione, J. Feng, H.A. Padmore, W. Wan LBNL, Berkeley, California, USA I. Ben-Zvi, M. Ruiz-Osés, L. Xue Stony Brook University, Stony Brook, USA D. Dowell SLAC, Menlo Park, California, USA T. Rao, J. Smedley BNL, Upton, Long Island, New York, USA
	Funding: This work was supported by the Director, Office of Science, Office of Basic Energy Sciences of the U. S. Department of Energy, under Contract DE-AC02-05CH11231, KC0407-ALSJNT-I0013, and DE-SC0005713 Here we present first measurements of the effect of roughness on the emittance of K2CsSb photocathodes under high fields. We show that for very thin cathodes the effect is negligible at up to 3 MV/m but for thicker and more efficient cathodes the effect becomes significant. We discuss ways to modify the deposition to circumvent this problem.

Paper

Title

Page

Effect of Roughness on Emittance of Potassium Cesium Antimonide Photocathodes

655

T. Vecchione, J. Feng, H.A. Padmore, W. Wan
LBNL, Berkeley, California, USA
I. Ben-Zvi, M. Ruiz-Osés, L. Xue
Stony Brook University, Stony Brook, USA
D. Dowell
SLAC, Menlo Park, California, USA
T. Rao, J. Smedley
BNL, Upton, Long Island, New York, USA

Funding: This work was supported by the Director, Office of Science, Office of Basic Energy Sciences of the U. S. Department of Energy, under Contract DE-AC02-05CH11231, KC0407-ALSJNT-I0013, and DE-SC0005713
Here we present first measurements of the effect of roughness on the emittance of K2CsSb photocathodes under high fields. We show that for very thin cathodes the effect is negligible at up to 3 MV/m but for thicker and more efficient cathodes the effect becomes significant. We discuss ways to modify the deposition to circumvent this problem.