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

Conference · Fri Jun 02 00:00:00 EDT 2017

DOI:https://doi.org/10.18429/JACoW-NAPAC2016-WEPOB26· OSTI ID:1393166

Edelen, J. P.; Sun, Y.; Harris, J. R.; Lewellen, J. W.

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.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 1393166
• 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

Related Subjects

REPETITION-RATE
DEPENDENT EMISSION
RF GUN