22 April 2016 Wide-bandwidth Tm-based amplifier for laser acceleration driver
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Abstract
We report on an investigation of novel 2 μm thulium (Tm)-based laser accelerator driver (LAD) offering efficient generation of high-energy pulses with high-peak power at high pulse repetition rate (PRF), high efficiency, and with near-diffraction-limited beam quality (BQ). Laser acceleration of electrons by ultrashortpulse laser-generated plasmas offers accelerators of much reduced size and cost compared to conventional accelerators of the same energy, thus replacing the traditional mammoth-size and costly accelerator research facilities with room-size systems1. A LAD operating at 2 μm wavelength offers ponderomotive forces four times that of 1 μm wavelength and six times that of a traditional 0.8 μm wavelength LAD. In addition, the Tm bandwidth of nearly 400 nm offers > 15% tunability and generation of ultrashort pulses down to <30 fs. The “2-for- 1” pump quantum efficiency of the Tm ion enables > 20% wall-plug efficiency. This work presents a preliminary analysis of Tm-based LAD configurations.
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Drew A. Copeland, John Vetrovec, Amardeep S. Litt, "Wide-bandwidth Tm-based amplifier for laser acceleration driver", Proc. SPIE 9729, High Energy/Average Power Lasers and Intense Beam Applications IX, 97290I (22 April 2016); doi: 10.1117/12.2220010; https://doi.org/10.1117/12.2220010
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