학술논문
Correlations between X-rays, Visible Light and Drive-Beam Energy Loss Observed in Plasma Wakefield Acceleration Experiments at FACET-II
Document Type
Working Paper
Author
Zhang, Chaojie; Storey, Doug; Claveria, Pablo San Miguel; Nie, Zan; Marsh, Ken A.; Mori, Warren B.; Adli, Erik; An, Weiming; Ariniello, Robert; Cao, Gevy J.; Clark, Christine; Corde, Sebastien; Dalichaouch, Thamine; Doss, Christopher E.; Emma, Claudio; Ekerfelt, Henrik; Gerstmayr, Elias; Gessner, Spencer; Hansel, Claire; Knetsch, Alexander; Lee, Valentina; Li, Fei; Litos, Mike; O'Shea, Brendan; White, Glen; Yocky, Gerry; Zakharova, Viktoriia; Hogan, Mark; Joshi, Chan
Source
Subject
Language
Abstract
This study documents several correlations observed during the first run of the plasma wakefield acceleration experiment E300 conducted at FACET-II, using a single drive electron bunch. The established correlations include those between the measured maximum energy loss of the drive electron beam and the integrated betatron x-ray signal, the calculated total beam energy deposited in the plasma and the integrated x-ray signal, among three visible light emission measuring cameras, and between the visible plasma light and x-ray signal. The integrated x-ray signal correlates almost linearly with both the maximum energy loss of the drive beam and the energy deposited into the plasma, demonstrating its usability as a measure of energy transfer from the drive beam to the plasma. Visible plasma light is found to be a useful indicator of the presence of wake at three locations that overall are two meters apart. Despite the complex dynamics and vastly different timescales, the x-ray radiation from the drive bunch and visible light emission from the plasma may prove to be effective non-invasive diagnostics for monitoring the energy transfer from the beam to the plasma in future high-repetition-rate experiments.
Comment: 20 pages, 6 figures
Comment: 20 pages, 6 figures