title: Structured photocathodes for improved high-energy x-ray efficiency in streak cameras.
abstract: We have designed and fabricated a structured streak camera photocathode to provide enhanced efficiency for high energy X-rays (1-12 keV). This gold coated photocathode was tested in a streak camera and compared side by side against a conventional flat thin film photocathode. Results show that the measured electron yield enhancement at energies ranging from 1 to 10 keV scales well with predictions, and that the total enhancement can be more than 3×. The spatial resolution of the streak camera does not show degradation in the structured region. We predict that the temporal resolution of the detector will also not be affected as it is currently dominated by the slit width. This demonstration with Au motivates exploration of comparable enhancements with CsI and may revolutionize X-ray streak camera photocathode design.
authors.affiliation: National Security Technologies, LLC, Livermore, California 94551, USA.
authors.forename: Y P
authors.initials: YP
authors.lastname: Opachich
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: Nanoshift LLC, Emeryville, California 94608, USA.
authors.forename: N
authors.initials: N
authors.lastname: Chen
authors.affiliation: Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: J
authors.initials: J
authors.lastname: Feng
authors.affiliation: Nanoshift LLC, Emeryville, California 94608, USA.
authors.forename: A
authors.initials: A
authors.lastname: Gopal
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
authors.forename: B
authors.initials: B
authors.lastname: Hatch
authors.affiliation: General Atomics, San Diego, California 92121, USA.
authors.forename: T J
authors.initials: TJ
authors.lastname: Hilsabeck
authors.affiliation: National Security Technologies, LLC, Livermore, California 94551, USA.
authors.forename: E
authors.initials: E
authors.lastname: Huffman
authors.affiliation: National Security Technologies, LLC, Livermore, California 94551, 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
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
authors.forename: A G
authors.initials: AG
authors.lastname: MacPhee
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
authors.forename: S R
authors.initials: SR
authors.lastname: Nagel
authors.affiliation: Nanoshift LLC, Emeryville, California 94608, USA.
authors.forename: S
authors.initials: S
authors.lastname: Udin