Stable Witness-Beam Formation in a Beam-Driven Plasma Cathode
Autor: | M. J. Garland, Alexander Knetsch, S. Wesch, Severin Diederichs, Trupen Parikh, S. Bohlen, Paul Winkler, Lucas Schaper, J. Chappell, Jens Osterhoff, R. D'Arcy, Beatriz Schmidt, G. Boyle, Bernhard Hidding, Vladyslav Libov, S. Schröder, Gabriele Tauscher, B. Sheeran, M. Meisel, L. Boulton, J. C. Wood, A. Martinez de la Ossa, T. Brümmer, P. Gonzalez Caminal, Kristjan Poder, Ming Zeng, B. Foster, P. Niknejadi, C. A. Lindstrøm |
---|---|
Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Nuclear and High Energy Physics
Materials science Physics and Astronomy (miscellaneous) wake field [plasma] density [plasma] Trapping Electron QC770-798 7. Clean energy 01 natural sciences Photocathode law.invention wake field [accelerator] law Physics::Plasma Physics Nuclear and particle physics. Atomic energy. Radioactivity 0103 physical sciences Thermal emittance ddc:530 DESY Lab 010306 general physics 010308 nuclear & particles physics bibliography Surfaces and Interfaces Plasma stability electrode beam [electron] Cathode 3. Good health velocity [electron] beam emittance efficiency energy spectrum [electron] Physics::Accelerator Physics Atomic physics injection [beam] Beam (structure) performance Relative energy |
Zdroj: | Physical Review Accelerators and Beams, Vol 24, Iss 10, p 101302 (2021) Physical review accelerators and beams 24(10), 101302 (2021). doi:10.1103/PhysRevAccelBeams.24.101302 |
Popis: | Electron beams to be accelerated in beam-driven plasma wakes are commonly formed by a photocathode and externally injected into the wakefield of a preceding bunch. Alternatively, using the plasma itself as a cathode offers the possibility of generating ultrashort, low-emittance beams by trapping and accelerating electrons from the ambient plasma background. Here, we present a beam-driven plasma cathode realized via laser-triggered density-downramp injection, showing stable beam formation over more than a thousand consecutive events with an injection probability of 95%. The plasma cathode is highly tunable, resulting in the injection of electron bunches of tens of pC of charge, energies of up to 79 MeV, and relative energy spreads as low as a few percent. The stability of the injected beams was sufficiently high to experimentally determine their normalized emittance of 9.3 μm rms with a multishot method. |
Databáze: | OpenAIRE |
Externí odkaz: |