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Simulations of Charge Gain and Collection Efficiency from Diamond Amplifiers

Published online by Cambridge University Press:  31 January 2011

Dimitre A. Dimitrov
Affiliation:
dad@txcorp.com, Tech-X Corporation, Boulder, Colorado, United States
Richard Busby
Affiliation:
busby@txcorp.com, Tech-X Corporation, Boulder, Colorado, United States
John R. Cary
Affiliation:
cary@txcorp.com, Tech-X Corporation, Boulder, Colorado, United States
Ilan Ben-Zvi
Affiliation:
benzvi@bnl.gov, Brookhaven National Laboratory, Upton, New York, United States
John Smedley
Affiliation:
smedley@bnl.gov, Brookhaven National Laboratory, Upton, New York, United States
Xiangyun Chang
Affiliation:
xychang@bnl.gov, Brookhaven National Laboratory, Upton, New York, United States
Triveni Rao
Affiliation:
triveni@bnl.gov, Brookhaven National Laboratory, Upton, New York, United States
Jeffrey W. Keister
Affiliation:
jkeister@bnl.gov, Brookhaven National Laboratory, NSLS-II, 11973, New York, United States
Erik M. Muller
Affiliation:
emuller@bnl.gov, Brookhaven National Laboratory, Instrumentation Division, Building 535B, Upton, New York, 11973, United States
Andrew Burrill
Affiliation:
aburrill@bnl.gov, Brookhaven National Laboratory, Upton, New York, United States
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Abstract

A promising new concept of a diamond amplified photocathode for generation of high-current, high-brightness, and low thermal emittance electron beams was recently proposed and is currently under active development. To better understand the different effects involved, we have been developing models, within the VORPAL computational framework, to simulate secondary electron generation and charge transport in diamond. The implemented models include inelastic scattering of electrons and holes for generation of electron-hole pairs, elastic, phonon, and charge impurity scattering. We will discuss these models and present results from 3D VORPAL simulations on charge gain and collection efficiency as a function of primary electron energy and applied electric field. The implemented modeling capabilities already allow us to investigate specific effects and compare simulation results with experimental data.

Type
Research Article
Copyright
Copyright © Materials Research Society 2010

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References

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