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Title: Observation of Repetition-Rate Dependent Emission From an Un-Gated Thermionic Cathode Rf Gun

Abstract

Recent work at Fermilab in collaboration with the Advanced Photon Source and members of other national labs, designed an experiment to study the relationship between the RF repetition rate and the average current per RF pulse. While existing models anticipate a direct relationship between these two parameters we observed an inverse relationship. We believe this is a result of damage to the barium coating on the cathode surface caused by a change in back-bombardment power that is unaccounted for in the existing theories. These observations shed new light on the challenges and fundamental limitations associated with scaling an ungated thermionic cathode RF gun to high average current.

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1393166
DOE Contract Number:
AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Conference: 2016 North American Particle Accelerator Conference, 10/09/16 - 10/14/16, Chicago, IL, US
Country of Publication:
United States
Language:
English
Subject:
REPETITION-RATE; DEPENDENT EMISSION; RF GUN

Citation Formats

Edelen, J. P., Sun, Y., Harris, J.R., and Lewellen, J.W.. Observation of Repetition-Rate Dependent Emission From an Un-Gated Thermionic Cathode Rf Gun. United States: N. p., 2017. Web. doi:10.18429/JACoW-NAPAC2016-WEPOB26.
Edelen, J. P., Sun, Y., Harris, J.R., & Lewellen, J.W.. Observation of Repetition-Rate Dependent Emission From an Un-Gated Thermionic Cathode Rf Gun. United States. doi:10.18429/JACoW-NAPAC2016-WEPOB26.
Edelen, J. P., Sun, Y., Harris, J.R., and Lewellen, J.W.. Fri . "Observation of Repetition-Rate Dependent Emission From an Un-Gated Thermionic Cathode Rf Gun". United States. doi:10.18429/JACoW-NAPAC2016-WEPOB26. https://www.osti.gov/servlets/purl/1393166.
@article{osti_1393166,
title = {Observation of Repetition-Rate Dependent Emission From an Un-Gated Thermionic Cathode Rf Gun},
author = {Edelen, J. P. and Sun, Y. and Harris, J.R. and Lewellen, J.W.},
abstractNote = {Recent work at Fermilab in collaboration with the Advanced Photon Source and members of other national labs, designed an experiment to study the relationship between the RF repetition rate and the average current per RF pulse. While existing models anticipate a direct relationship between these two parameters we observed an inverse relationship. We believe this is a result of damage to the barium coating on the cathode surface caused by a change in back-bombardment power that is unaccounted for in the existing theories. These observations shed new light on the challenges and fundamental limitations associated with scaling an ungated thermionic cathode RF gun to high average current.},
doi = {10.18429/JACoW-NAPAC2016-WEPOB26},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jun 02 00:00:00 EDT 2017},
month = {Fri Jun 02 00:00:00 EDT 2017}
}

Conference:
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