TY - JOUR
T1 - Plasma density profile reconstruction of a gas cell for Ionization Induced Laser Wakefield Acceleration
AU - Filippi, F.
AU - Dickson, L.
AU - Backhouse, M.
AU - Forestier-Colleoni, P.
AU - Gustafsson, C.
AU - Cobo, C.
AU - Ballage, C.
AU - Dobosz Dufrénoy, S.
AU - Löfquist, E.
AU - Maynard, G.
AU - Murphy, C.
AU - Najmudin, Z.
AU - Panza, F.
AU - Persson, A.
AU - Scisció, M.
AU - Vasilovici, O.
AU - Lundh, O.
AU - Cros, B.
N1 - Publisher Copyright:
© 2023 The Author(s)
PY - 2023/5/15
Y1 - 2023/5/15
N2 - Laser-driven plasma wakefields can provide hundreds of MeV electron beam in mm-range distances potentially shrinking the dimension of the actual particle accelerators. The plasma density plays a fundamental role in the control and stability of the acceleration process, which is a key development for the future electron injector proposed by EuPRAXIA. A gas cell was designed by LPGP and LIDYL teams, with variable length and backing pressure, to confine the gas and tailor the gas density profile before the arrival of the laser. This cell was used during an experimental campaign with the multi TW-class laser at the Lund Laser Centre. Ionization assisted injection in a tailored density profile is used to tune the electron beam properties. During the experiment, we filled the gas cell with hydrogen mixed with different concentration of nitrogen. We also varied the backing pressure of the gas and the geometrical length of the gas cell. We used a transverse probe to acquire shadowgraphic images of the plasma and to measure the plasma electron density. Methods and results of the analysis with comparisons between shadowgraphic and interferometric images will be discussed.
AB - Laser-driven plasma wakefields can provide hundreds of MeV electron beam in mm-range distances potentially shrinking the dimension of the actual particle accelerators. The plasma density plays a fundamental role in the control and stability of the acceleration process, which is a key development for the future electron injector proposed by EuPRAXIA. A gas cell was designed by LPGP and LIDYL teams, with variable length and backing pressure, to confine the gas and tailor the gas density profile before the arrival of the laser. This cell was used during an experimental campaign with the multi TW-class laser at the Lund Laser Centre. Ionization assisted injection in a tailored density profile is used to tune the electron beam properties. During the experiment, we filled the gas cell with hydrogen mixed with different concentration of nitrogen. We also varied the backing pressure of the gas and the geometrical length of the gas cell. We used a transverse probe to acquire shadowgraphic images of the plasma and to measure the plasma electron density. Methods and results of the analysis with comparisons between shadowgraphic and interferometric images will be discussed.
KW - Plasma diagnostics - interferometry, spectroscopy and imaging
KW - Wake-field acceleration (laser-driven, electron-driven)
UR - http://www.scopus.com/inward/record.url?scp=85159770612&partnerID=8YFLogxK
U2 - 10.1088/1748-0221/18/05/C05013
DO - 10.1088/1748-0221/18/05/C05013
M3 - Article
AN - SCOPUS:85159770612
SN - 1748-0221
VL - 18
JO - Journal of Instrumentation
JF - Journal of Instrumentation
IS - 5
M1 - C05013
ER -