Laser Wakfield Accelerator with external injector Seth Brussaard

Laser Wakfield Accelerator with external injector Seth Brussaard Wim Urbanus Walter van Dijk Bas van der Geer Marnix van der Wiel /n ELAN/ANAD 15 -05 -2006

Outline Design Parameter Space Status of the Project /n

Controlled Laser Wakefield Acceleration Drive Laser Plasma Channel Plasma Wave Electron Injector Laser Pulse Electron Bunch 1. Wave Excitation 2. Electron Injection 3. Wave Guiding /n

Design Parameters Laser Power: 1 -3 TW Injected Bunch Length: > 100 fs @ 7 Me. V Plasma Density: > 7 1024 m-3 /n

Design Layout RF photo-injector RF incoupling Ti: sapphire laser 100 m. J / 100 m. J electron beam flat mirror with hole parabolic mirror solenoid lens /n plasma channel

Modelling Front-to-End Particle Tracking 2 D (linear) Laser Wakefield /n

Radial Ejection /n GPT

Energy /n GPT

Output Energy vs. Injection Energy /n

Energy Accelerated Charge Energy Spread 2 TW laser power 30 m matched spot size 10 p. C injected charge /n

Energy Accelerated Charge Energy Spread 30 m matched spot size 10 p. C injected charge 6. 5 Me. V injection energy /n

in out Current [A] 10 p. C 6. 5 Me. V 80 60 40 40 20 20 0 0 100 200 300 400 0 0 time [fs] /n 10 fs 100 200 300

Counts [a. u. ] Output Energy 0 10 20 30 40 50 60 70 80 90 100 GPT E [Me. V] /n

Status of the LWFA experiment at Eindhoven RF photoinjector Plasma Status of the Setup /n

2. 6 Cell RF Cavity Total power Frequency Q Maximum output energy: 6. 9 Me. V Cathode field at max energy: <100 MV/m Launch phase: – 50° normalized field 1 0 10 MW 2998 MHz (2 ) 7200 0 5 10 position (cm) 15 /n

Plasma Reda Akdim & Herman van Dam Based on design by Simon Hooker et al. /n FOM-Rijnhuizen

Plasma Reda Akdim & Herman van Dam /n FOM-Rijnhuizen

Plasma FOM-Rijnhuizen Reda Akdim & Herman van Dam 4000 Pa 2000 Pa 1000 Pa 2, 0 ne(0) (1018 cm-3) WM (mm) 260 240 220 200 180 160 140 120 100 80 60 4000 Pa 2000 Pa 1, 5 1, 0 0, 5 0, 0 -100 0 100 200 300 400 500 600 700 800 900 Time (ns) -200 0 200 400 600 800 10001200140016001800 Time (ns) /n

Experiment ‘virtually’ ready /n