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TY - CONF
AU - Kuriki, M.
AU - Guo, L.
AU - Negishi, K.
AU - Seimiya, Y.
AU - Urano, M.
AU - Yokota, A.
ED - Schaa, Volker RW
ED - Arduini, Gianluigi
ED - Pranke, Juliana
ED - Seidel, Mike
ED - Lindroos, Mats
TI - A Lifetime Study of CsK2Sb Multi-Alkali Cathode
J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14–19 May, 2017
C1 - Copenhagen, Denmark
T2 - International Particle Accelerator Conference
T3 - 8
LA - english
AB - \rm CsK₂Sb is a high performance photo-cathode for accelerators requiring the high brightness electron beam. It can be driven by a green laser generated as SHG of a solid state laser. The quantum efficiency is as high as 10\%. In this article, the robustness of the cathode was studied experimentally. We found that 1/e lifetime of the cathode was inversely proportional to the vacuum pressure. The normalized temporal life was \rm (4.72± 0.08)× 10⁻⁵~Pa.hour for 532 nm laser. The lifetime regarding to the extracted charge density was also inversely proportional to the vacuum pressure. The normalized charge life was \rm (1.19± 0.03± 0.04)× 10⁻⁴ Pa.C/mm². The cathode is robust enough for a high brightness electron accelerator.
PB - JACoW
CP - Geneva, Switzerland
SP - 1440
EP - 1442
KW - cathode
KW - laser
KW - vacuum
KW - electron
KW - experiment
DA - 2017/05
PY - 2017
SN - 978-3-95450-182-3
DO - 10.18429/JACoW-IPAC2017-TUPAB050
UR - http://jacow.org/ipac2017/papers/tupab050.pdf
ER -