Developing field emission electron sources based on ultrananocrystalline diamond for accelerators

Radiofrequency (RF) electron guns work by establishing an RF electromagnetic field inside a cavity having conducting walls. Electrons from a cathode are generated in the injector and immediately become accelerated by the RF electric field, and exit the gun as a series of electron bunches. Finding si...

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Bibliographic Details
Main Authors: Baryshev, Sergey V., Chunguang Jing, Jiaqi Qiu, Antipov, Sergey, Jabotinski, Vadim, Jiahang Shao, Wei Gai, Sumant, Anirudha V.
Format: Conference Proceeding
Language:English
Subjects:
Cathodes
Cavity resonators
Diamond
Diamonds
Electric fields
Electron sources
Field emission
Heaters
Holes
Injectors
linac
Linear accelerators
Nanoelectronics
Plugs
Radio frequency
RF injector
utira-nano-crystalline diamond
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Summary:Radiofrequency (RF) electron guns work by establishing an RF electromagnetic field inside a cavity having conducting walls. Electrons from a cathode are generated in the injector and immediately become accelerated by the RF electric field, and exit the gun as a series of electron bunches. Finding simple solutions for electron injection is a long standing problem. While energies of 30-50 MeV are achievable in linear accelerators (linacs), finding an electron source able to survive under MW electric loads and provide an average current of 1-10 mA is important. Meeting these requirements would open various linac applications for industry. The natural way to simplify and integrate RF injector architectures with the electron source would be to place the source directly into the RF cavity with no need for additional heaters/lasers. Euclid TechLabs in collaboration with Argonne National Lab are prototyping a family of highly effective field emission electron sources based on a nitrogen-incorporated ultrananocrystalline diamond ((N)UNCD) platform. Determined metrics suggest that our emitters are emissive enough to meet requirements for magnetized cooling at electron-ion colliders, linac-based radioisotope production and X-ray sterilization, and others.
ISSN:2380-6311
DOI:10.1109/IVNC.2016.7551471