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Title: A simple model for determining photoelectron-generated radiation scaling laws

Abstract

The generation of radiation via photoelectrons induced off of a conducting surface was explored using a simple model to determine fundamental scaling laws. The model is one-dimensional (small-spot) and uses monoenergetic, nonrelativistic photoelectrons emitted normal to the illuminated conducting surface. Simple steady-state radiation, frequency, and maximum orbital distance equations were derived using small-spot radiation equations, a sin{sup 2} type modulation function, and simple photoelectron dynamics. The result is a system of equations for various scaling laws, which, along with model and user constraints, are simultaneously solved using techniques similar to linear programming. Typical conductors illuminated by low-power sources producing photons with energies less than 5.0 eV are readily modeled by this small-spot, steady-state analysis, which shows they generally produce low efficiency ({eta}{sub rsL}<10{sup {minus}10.5}) pure photoelectron-induced radiation. However, the small-spot theory predicts that the total conversion efficiency for incident photon power to photoelectron-induced radiated power can go higher than 10{sup {minus}5.5} for typical real conductors if photons having energies of 15 eV and higher are used, and should go even higher still if the small-spot limit of this theory is exceeded as well. Overall, the simple theory equations, model constraint equations, and solution techniques presented provide a foundation for understanding,more » predicting, and optimizing the generated radiation, and the simple theory equations provide scaling laws to compare with computational and laboratory experimental data.« less

Authors:
 [1]
  1. Los Alamos National Lab., NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab., NM (United States)
Sponsoring Org.:
Department of Defense, Washington, DC (United States)
OSTI Identifier:
10129658
Report Number(s):
LA-12674
ON: DE94006130; TRN: 94:005538
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Dec 1993
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ELECTRIC CONDUCTORS; SCALING LAWS; PHOTOELECTRIC EMISSION; EFFICIENCY; 665300; INTERACTIONS BETWEEN BEAMS AND CONDENSED MATTER

Citation Formats

Dipp, T M, and Air Force Office of Scientific Research, Bolling AFB, DC. A simple model for determining photoelectron-generated radiation scaling laws. United States: N. p., 1993. Web. doi:10.2172/10129658.
Dipp, T M, & Air Force Office of Scientific Research, Bolling AFB, DC. A simple model for determining photoelectron-generated radiation scaling laws. United States. https://doi.org/10.2172/10129658
Dipp, T M, and Air Force Office of Scientific Research, Bolling AFB, DC. Wed . "A simple model for determining photoelectron-generated radiation scaling laws". United States. https://doi.org/10.2172/10129658. https://www.osti.gov/servlets/purl/10129658.
@article{osti_10129658,
title = {A simple model for determining photoelectron-generated radiation scaling laws},
author = {Dipp, T M and Air Force Office of Scientific Research, Bolling AFB, DC},
abstractNote = {The generation of radiation via photoelectrons induced off of a conducting surface was explored using a simple model to determine fundamental scaling laws. The model is one-dimensional (small-spot) and uses monoenergetic, nonrelativistic photoelectrons emitted normal to the illuminated conducting surface. Simple steady-state radiation, frequency, and maximum orbital distance equations were derived using small-spot radiation equations, a sin{sup 2} type modulation function, and simple photoelectron dynamics. The result is a system of equations for various scaling laws, which, along with model and user constraints, are simultaneously solved using techniques similar to linear programming. Typical conductors illuminated by low-power sources producing photons with energies less than 5.0 eV are readily modeled by this small-spot, steady-state analysis, which shows they generally produce low efficiency ({eta}{sub rsL}<10{sup {minus}10.5}) pure photoelectron-induced radiation. However, the small-spot theory predicts that the total conversion efficiency for incident photon power to photoelectron-induced radiated power can go higher than 10{sup {minus}5.5} for typical real conductors if photons having energies of 15 eV and higher are used, and should go even higher still if the small-spot limit of this theory is exceeded as well. Overall, the simple theory equations, model constraint equations, and solution techniques presented provide a foundation for understanding, predicting, and optimizing the generated radiation, and the simple theory equations provide scaling laws to compare with computational and laboratory experimental data.},
doi = {10.2172/10129658},
url = {https://www.osti.gov/biblio/10129658}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {12}
}