A broad energy range (100 MeV–10 GeV) electron spectrometer for high power laser wakefield acceleration experiments
Deepak Sangwan,
Soiciro Aogaki,
Septimiu Balascuta,
Florin Rotaru,
Petru Ghenuche,
Mihai Risca,
Dan Stutman,
Bogdan Diaconescu
Affiliations
Deepak Sangwan
Extreme Light Infrastructure - Nuclear Physics ELI-NP, “Horia Hulubei” National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125 Bucharest-Magurele, Romania
Soiciro Aogaki
Extreme Light Infrastructure - Nuclear Physics ELI-NP, “Horia Hulubei” National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125 Bucharest-Magurele, Romania
Septimiu Balascuta
Extreme Light Infrastructure - Nuclear Physics ELI-NP, “Horia Hulubei” National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125 Bucharest-Magurele, Romania
Florin Rotaru
Extreme Light Infrastructure - Nuclear Physics ELI-NP, “Horia Hulubei” National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125 Bucharest-Magurele, Romania
Petru Ghenuche
Extreme Light Infrastructure - Nuclear Physics ELI-NP, “Horia Hulubei” National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125 Bucharest-Magurele, Romania
Mihai Risca
Extreme Light Infrastructure - Nuclear Physics ELI-NP, “Horia Hulubei” National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125 Bucharest-Magurele, Romania
Dan Stutman
Extreme Light Infrastructure - Nuclear Physics ELI-NP, “Horia Hulubei” National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125 Bucharest-Magurele, Romania
Bogdan Diaconescu
Extreme Light Infrastructure - Nuclear Physics ELI-NP, “Horia Hulubei” National Institute for Physics and Nuclear Engineering, 30 Reactorului Street, RO-077125 Bucharest-Magurele, Romania
Laser wakefield acceleration is able to provide electron beams of GeV energy and continuously evolves toward higher energies. These beams have broad energy spectrum; hence, their measurements require diagnostics with wide energy acceptance. Here, we present a design of an electron spectrometer to characterize the beams in the energy range of 100 MeV–10 GeV, in a single shot. The design consists of 1-m long permanent dipole magnets and has a variable gap opening to accommodate different divergences and pointings of the electron beams. The design is backed by simulations, which are used to optimize the positions of imaging plates. The use of a collimator to improve the energy resolution in the case of large beam divergences and beam pointing is presented. We also present the Monte Carlo simulations to evaluate the signal to noise ratio, with and without a collimator.
