A High-Density Hydrogen-Based Capillary Plasma Source for Particle-Beam-Driven Wakefield Accelerator Applications

Autor:	Patric Muggli, Martin A. Gundersen, Efthymios Kallos, Hao Chen, Tom Katsouleas
Rok vydání:	2009
Předmět:	Nuclear and High Energy Physics Materials science Particle accelerator Plasma Condensed Matter Physics Plasma acceleration Electric discharge in gases law.invention Physics::Plasma Physics law Capillary Plasma Cathode ray Physics::Accelerator Physics Plasma diagnostics Atomic physics Particle beam
Zdroj:	IEEE Transactions on Plasma Science. 37:456-462
ISSN:	1939-9375 0093-3813
DOI:	10.1109/tps.2008.2011799
Popis:	We report the generation of variable plasma densities up to 1019 cm-3 in hydrogen-filled hollow cathode capillary discharges and consider their applications as a practical plasma source for particle-beam-driven plasma wakefield accelerators. The capillary consists of a transparent cylindrical borosilicate glass tube. The plasma density is determined as a function of time, using Stark broadening of the Halpha line, with a resolution of 50 ns, and is found to decay exponentially with a typical time constant of several hundreds of nanoseconds. The time delay between the discharge and the drive electron beam can therefore be tuned to reach the density appropriate for the maximum acceleration gradient. The dependence of the plasma density on the capillary geometry and gas pressure is discussed, and the results of optical studies of the discharge channel formation process are presented. The implications of the results for beam-driven plasma accelerators araree discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::912fe67a30dfefe2a9c67764a7b62694 https://doi.org/10.1109/tps.2008.2011799 Zobrazit plný text záznamu