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Analysis of Spent Free Electron Laser Photocathodes


EMSL Project ID
40990

Abstract

This project will use existing capabilities to characterize expired photocathode materials. We will conduct post-mortem investigations of used (expired) photocathodes from JLab to determine photocathode degradation mechanisms under operating FEL conditions. Initial interrogation will use time-of-flight secondary ion mass spectrometry (TOF-SIMS) and Rutherford backscattering spectrometery (RBS) to understand the elemental depth profiles. Subsequent post-mortem analysis may include EMSL equipment such as atom probe tomography (ATM) to determine the spatial distribution of the elements.

Project Details

Project type
Limited Scope
Start Date
2010-06-29
End Date
2010-08-29
Status
Closed

Team

Principal Investigator

Wayne Hess
Institution
Pacific Northwest National Laboratory

Team Members

Theva Thevuthasan
Institution
Environmental Molecular Sciences Laboratory

Related Publications

Shutthanandan V, Z Zhu, ML Stutzman, F Hannon, C Hernandez-Garcia, MI Nandasiri, SVNT Kuchibhatla, S Thevuthasan, and WP Hess. 2012. "Surface Science Analysis of GaAs Photocathodes Following Sustained Electron Beam Delivery." Physical Review Special Topics - Accelerators and Beams 15(6):063501. doi:10.1103/PhysRevSTAB.15.063501