Nanosecond pulsed electron beams in the 1–10 keV energy range have been characterized by means of an electrostatic diagnostic in the Malmberg-Penning trap ELTRAP. The beam length has been inferred through the numerical analysis of the signals measured across the overall load impedance of a planar charge collector. The presence of space charge effects leading to a longitudinal spread of the beam during its transport are evidenced at low injection energies. This feature has also been tested with the use of a one-dimensional fluid model and with two-dimensional, cylindrically-symmetric Particle-In-Cell simulations, whose results are compared to the experimental observations.
Longitudinal space charge effects in bunched electron beams travelling through a Malmberg-Penning trap / M. Romé, F. Cavaliere, M. Cavenago, F. De Luca, G. Maero, B. Paroli, R. Pozzoli - In: Plasmas in the laboratory and the Universe : interactions, patterns, and turbulence : Como, Italy, 1–4 December 2009 / [a cura di] G. Bertin, F. De Luca, G. Lodato, R. Pozzoli, M. Romé. - Melville, NY : American institute of physics, 2010. - ISBN 978-0-7354-0787-9. - pp. 349-354 (( convegno Plasmas in the laboratory and the Universe : interactions, patterns, and turbulence : international symposium tenutosi a Como, Italy nel 2009 [10.1063/1.3460148].
Longitudinal space charge effects in bunched electron beams travelling through a Malmberg-Penning trap
M. RoméPrimo
;F. CavaliereSecondo
;F. De Luca;G. Maero;B. ParoliPenultimo
;R. PozzoliUltimo
2010
Abstract
Nanosecond pulsed electron beams in the 1–10 keV energy range have been characterized by means of an electrostatic diagnostic in the Malmberg-Penning trap ELTRAP. The beam length has been inferred through the numerical analysis of the signals measured across the overall load impedance of a planar charge collector. The presence of space charge effects leading to a longitudinal spread of the beam during its transport are evidenced at low injection energies. This feature has also been tested with the use of a one-dimensional fluid model and with two-dimensional, cylindrically-symmetric Particle-In-Cell simulations, whose results are compared to the experimental observations.Pubblicazioni consigliate
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