Plasma Wakefield Diagnostic on AWAKE using Photon Acceleration

Muhammad Firmansyah KasimSupervisor: Peter A. Norreys and

Philip N. Burrows

Overview• Goal: to determine the wakefield profile along

the plasma (i.e. average amplitude along the propagation)

• Probe characteristics: 800 nm, 10 mJ, 12 ps• Limitations:– Average wakefield amplitude 0.2 – Minimum polarizer extinction ratio: 1000:1 (for

100 mJ pump pulse)– Minimum optics’ damage threshold: < 1 J/cm2.

Some technical considerations

• Put polarizers, transport optics, and stretcher in the laser room (when the laser diameter is about 40-50 mm), so they can withstand with the laser intensity.

• Small extinction ratio? Add more polarizers.

Devices

• From us:– Spectrometer– FROG / GRENOUILLE– CCD camera

• From AWAKE:– Laser– Stretcher– Transport optics– Alignment system