TY - GEN
T1 - Simulations of surface effects and electron emission from diamond-amplifier cathodes
AU - Dimitrov, D. A.
AU - Busby, R.
AU - Smithe, D.
AU - Cary, J. R.
AU - Ben-Zvi, I.
AU - Chang, X.
AU - Rao, T.
AU - Smedley, J.
AU - Wu, Q.
AU - Wang, E.
PY - 2011
Y1 - 2011
N2 - Emission of electrons in diamond experiments based on the promising diamond-amplifier concept [1] was recently demonstrated [2]. Transmission mode experiments have shown the potential to realize over two orders of magnitude charge amplification. However, the recent emission experiments indicate that surface effects should be understood in detail to build cathodes with optimal properties. We have made progress in understanding secondary electron generation and charge transport in diamond with models we implemented in the VORPAL particle-in-cell computational framework. We introduce models that we have been implementing for surface effects (band bending and electron affinity), charge trapping, and electron emission from diamond. Then, we present results from 3D VORPAL diamond-vacuum simulations with the integrated capabilities on generating electrons and holes, initiated by energetic primary electrons, charge transport, and then emission of electrons from diamond into vacuum. Finally, we discuss simulation results on the dependence of the electron emission on diamond surface properties.
AB - Emission of electrons in diamond experiments based on the promising diamond-amplifier concept [1] was recently demonstrated [2]. Transmission mode experiments have shown the potential to realize over two orders of magnitude charge amplification. However, the recent emission experiments indicate that surface effects should be understood in detail to build cathodes with optimal properties. We have made progress in understanding secondary electron generation and charge transport in diamond with models we implemented in the VORPAL particle-in-cell computational framework. We introduce models that we have been implementing for surface effects (band bending and electron affinity), charge trapping, and electron emission from diamond. Then, we present results from 3D VORPAL diamond-vacuum simulations with the integrated capabilities on generating electrons and holes, initiated by energetic primary electrons, charge transport, and then emission of electrons from diamond into vacuum. Finally, we discuss simulation results on the dependence of the electron emission on diamond surface properties.
UR - https://www.scopus.com/pages/publications/84885724108
M3 - Conference contribution
AN - SCOPUS:84885724108
SN - 9789290833666
T3 - IPAC 2011 - 2nd International Particle Accelerator Conference
SP - 2307
EP - 2309
BT - IPAC 2011 - 2nd International Particle Accelerator Conference
T2 - 2nd International Particle Accelerator Conference, IPAC 2011
Y2 - 4 September 2011 through 9 September 2011
ER -