title: High quantum efficiency photocathode simulation for the investigation of novel structured designs.
abstract: A computer model in CST Studio Suite has been developed to evaluate several novel geometrically enhanced photocathode designs. This work was aimed at identifying a structure that would increase the total electron yield by a factor of two or greater in the 1-30 keV range. The modeling software was used to simulate the electric field and generate particle tracking for several potential structures. The final photocathode structure has been tailored to meet a set of detector performance requirements, namely, a spatial resolution of <40 μm and a temporal spread of 1-10 ps. We present the details of the geometrically enhanced photocathode model and resulting static field and electron emission characteristics.
authors.affiliation: National Security Technologies LLC, Livermore, California 94550, USA.
authors.forename: Y P
authors.initials: YP
authors.lastname: Opachich
authors.affiliation: National Security Technologies LLC, Livermore, California 94550, USA.
authors.forename: P W
authors.initials: PW
authors.lastname: Ross
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
authors.forename: A G
authors.initials: AG
authors.lastname: MacPhee
authors.affiliation: General Atomics, San Diego, California 92121, USA.
authors.forename: T J
authors.initials: TJ
authors.lastname: Hilsabeck
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
authors.forename: S R
authors.initials: SR
authors.lastname: Nagel
authors.affiliation: National Security Technologies LLC, Livermore, California 94550, USA.
authors.forename: E
authors.initials: E
authors.lastname: Huffman
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
authors.forename: P M
authors.initials: PM
authors.lastname: Bell
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
authors.forename: D K
authors.initials: DK
authors.lastname: Bradley
authors.affiliation: National Security Technologies LLC, Livermore, California 94550, USA.
authors.forename: J A
authors.initials: JA
authors.lastname: Koch
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
authors.forename: O L
authors.initials: OL
authors.lastname: Landen