Externally Heated Hollow Cathode Arc Plasma Source for Experiments in Plasma Wakefield Acceleration

Autor: Ryan Roussel, Gerard Andonian, Claire Hansel, Gerard Lawler, Walter Lynn, Nathan Majernik, River Robles, Kunal Sanwalka, Eric Wisniewski, James Rosenzweig
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Instruments, Vol 3, Iss 3, p 48 (2019)
Druh dokumentu: article
ISSN: 2410-390X
DOI: 10.3390/instruments3030048
Popis: An externally heated, hollow cathode arc source was recommissioned at UCLA for use in experiments to drive plasma wakefields with shaped beams at the Argonne Wakefield Accelerator. The hollow cathode arc source provides a robust plasma column with a density in the 10 13 − 10 14 cm − 3 range while external heating of the cathode allows the plasma arc regime to be accessed with applied voltages down to 20 V. Overall source operating principals are described, along with time-resolved plasma current measurements and plasma density characterization with the use of a triple Langumir probe. The results show that relevant plasma densities that match facility beam parameters are readily achievable.
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