TY - GEN
T1 - Modeling electron emission and surface effects from diamond cathodes
AU - Dimitrov, D. A.
AU - Cary, J. R.
AU - Smithe, D.
AU - Zhou, C.
AU - Ben-Zvi, I.
AU - Rao, T.
AU - Smedley, J.
AU - Wang, E.
N1 - Publisher Copyright:
Copyright © 2015 CC-BY-3.0 and by the respective authors.
PY - 2015
Y1 - 2015
N2 - We developed modeling capabilities, within the Vorpal particle-in-cell code, for three-dimensional (3D) simulations of surface effects and electron emission from semiconductor photocathodes. They include calculation of emission probabilities using general, piece-wise continuous, spacetime dependent surface potentials, effective mass and band bending field effects. We applied these models, in combination with previously implemented capabilities for modeling charge generation and transport in diamond, to investigate the emission dependence on applied electric field in the range from approximately 2 to 17 MV/m along the [100] direction. The simulation results were compared to experimental data when using different emission models, band bending effects, and surface-dependent electron affinity. Simulations using surface patches with different levels of hydrogenation lead to the closest agreement with the experimental data.
AB - We developed modeling capabilities, within the Vorpal particle-in-cell code, for three-dimensional (3D) simulations of surface effects and electron emission from semiconductor photocathodes. They include calculation of emission probabilities using general, piece-wise continuous, spacetime dependent surface potentials, effective mass and band bending field effects. We applied these models, in combination with previously implemented capabilities for modeling charge generation and transport in diamond, to investigate the emission dependence on applied electric field in the range from approximately 2 to 17 MV/m along the [100] direction. The simulation results were compared to experimental data when using different emission models, band bending effects, and surface-dependent electron affinity. Simulations using surface patches with different levels of hydrogenation lead to the closest agreement with the experimental data.
UR - https://www.scopus.com/pages/publications/84994591231
M3 - Conference contribution
AN - SCOPUS:84994591231
T3 - 6th International Particle Accelerator Conference, IPAC 2015
SP - 620
EP - 622
BT - 6th International Particle Accelerator Conference, IPAC 2015
PB - Joint Accelerator Conferences Website (JACoW)
T2 - 6th International Particle Accelerator Conference, IPAC 2015
Y2 - 3 May 2015 through 8 May 2015
ER -