Abstract
After a bibliographic research on field emission, photoemission and photo-field emission, the principle of the field equations (Poisson and Maxwell`s) resolution by the finite element method is developed. The PRIAM program is shown to be efficient (adaptive mesh and refinement in the selected area). Several possibilities exist to reduce the effect of space charge such as the decrease of the laser pulse duration, the increase of the electric field and the application of a magnetic field. Calculations of the transverse emittance for a metallic plan photocathode have been made at different moments of the emission: transverse emittance is small at the beginning and at the end of the emission. It passes by a maximum which can be the origin of the electronic beam explosion for strong field. If a small emittance is wanted, one must illuminate the photocathode by a short pulsed laser.
Citation Formats
Wattar, H.
Simulation study of the field emission and photoemission on metallic photocathodes. Emitted beam dynamics; Etude par simulation de l`emission de champ et de la photoemission de champ sur des photocathodes metalliques. Dynamique du faisceau emis.
France: N. p.,
1992.
Web.
Wattar, H.
Simulation study of the field emission and photoemission on metallic photocathodes. Emitted beam dynamics; Etude par simulation de l`emission de champ et de la photoemission de champ sur des photocathodes metalliques. Dynamique du faisceau emis.
France.
Wattar, H.
1992.
"Simulation study of the field emission and photoemission on metallic photocathodes. Emitted beam dynamics; Etude par simulation de l`emission de champ et de la photoemission de champ sur des photocathodes metalliques. Dynamique du faisceau emis."
France.
@misc{etde_10127252,
title = {Simulation study of the field emission and photoemission on metallic photocathodes. Emitted beam dynamics; Etude par simulation de l`emission de champ et de la photoemission de champ sur des photocathodes metalliques. Dynamique du faisceau emis}
author = {Wattar, H}
abstractNote = {After a bibliographic research on field emission, photoemission and photo-field emission, the principle of the field equations (Poisson and Maxwell`s) resolution by the finite element method is developed. The PRIAM program is shown to be efficient (adaptive mesh and refinement in the selected area). Several possibilities exist to reduce the effect of space charge such as the decrease of the laser pulse duration, the increase of the electric field and the application of a magnetic field. Calculations of the transverse emittance for a metallic plan photocathode have been made at different moments of the emission: transverse emittance is small at the beginning and at the end of the emission. It passes by a maximum which can be the origin of the electronic beam explosion for strong field. If a small emittance is wanted, one must illuminate the photocathode by a short pulsed laser.}
place = {France}
year = {1992}
month = {Jul}
}
title = {Simulation study of the field emission and photoemission on metallic photocathodes. Emitted beam dynamics; Etude par simulation de l`emission de champ et de la photoemission de champ sur des photocathodes metalliques. Dynamique du faisceau emis}
author = {Wattar, H}
abstractNote = {After a bibliographic research on field emission, photoemission and photo-field emission, the principle of the field equations (Poisson and Maxwell`s) resolution by the finite element method is developed. The PRIAM program is shown to be efficient (adaptive mesh and refinement in the selected area). Several possibilities exist to reduce the effect of space charge such as the decrease of the laser pulse duration, the increase of the electric field and the application of a magnetic field. Calculations of the transverse emittance for a metallic plan photocathode have been made at different moments of the emission: transverse emittance is small at the beginning and at the end of the emission. It passes by a maximum which can be the origin of the electronic beam explosion for strong field. If a small emittance is wanted, one must illuminate the photocathode by a short pulsed laser.}
place = {France}
year = {1992}
month = {Jul}
}