Sep 15 – 21, 2019
Hotel Hermitage, La Biodola Bay, Isola d'Elba, Italy
Europe/Rome timezone

Betatron radiation diagnostic for AWAKE Run 2

Sep 16, 2019, 7:00 PM
Parking Area (Hotel Hermitage)

Parking Area

Hotel Hermitage

poster WG5 - Plasma devices, plasma and beam diagnostics Cheese and Wine Poster Session 1


Barney Williamson (University of Manchester)


Proof-of-concept experiments in AWAKE Run 1 have demonstrated electron acceleration in a proton-driven wakefield$^1$. A high momentum proton beam can drive a wakefield over long distances and overcome some limitations of lepton-driven schemes, which are susceptible to energy depletion. AWAKE Run 2 aims to preserve the beam quality of an injected electron beam throughout acceleration, and consequently a new diagnostic to measure the electron beam emittance after the plasma cell is required. Betatron radiation spectroscopy is a valuable diagnostic tool for the laser-plasma accelerator (LPA) community, and has been used to reconstruct the trace-space of an LPA-generated electron beam$^2$. We propose implementing a similar system at the AWAKE experiment. The expected betatron emission from witness electrons at AWAKE is fully characterised using 3D quasi-static PIC simulations with the code QV3D$^3$, and a diagnostic system able to measure such a betatron spectrum is described. Initial measurements and challenges related to the proton driver are discussed.

$^1$Adli, E. et al. Nature 561, 363-367 (2018).
$^2$Curcio, A. et al. PRAB 20, 012801 (2017).
$^3$Pukhov A. CERN Yellow Rep. 1 , 181 (2016).

Primary authors

Barney Williamson (University of Manchester) Guoxing Xia (Cockcroft Institute and the University of Manchester) Alexey Petrenko (CERN) Spencer Gessner (CERN) Alexander Pukhov (uni duesseldorf)

Presentation materials