Enhanced MVA of Polarized Proton Beams via PW Laser-Driven Plasma Bubble
arXiv:2503.10067 · doi:10.1063/5.0249082
Abstract
The significance of laser-driven polarized beam acceleration has been increasingly recognized in recent years. We propose an efficient method for generating polarized proton beams from a pre-polarized hydrogen halide gas jet, utilizing magnetic vortex acceleration enhanced by a laser-driven plasma bubble. When a petawatt laser pulse passes through a pre-polarized gas jet, a bubble-like ultra-nonlinear plasma wave is formed. As part of the wave particles, background protons are swept by the acceleration field of the bubble and oscillate significantly along the laser propagation axis. Some of the pre-accelerated protons in the plasma wave are trapped by the acceleration field at the rear side of the target. This acceleration field is intensified by the transverse expansion of the laser-driven magnetic vortex, resulting in energetic polarized proton beams. The spin of energetic protons is determined by their precession within the electromagnetic field, as described by the Thomas-Bargmann-Michel-Telegdi equation in analytical models and particle-in-cell simulations. Multidimensional simulations reveal that monoenergetic proton beams with hundreds of MeV in energy, a beam charge of hundreds of pC, and a beam polarization of tens of percent can be produced at laser powers of several petawatts. Laser-driven polarized proton beams offer promising potential for application in polarized beam colliders, where they can be utilized to investigate particle interactions and to explore the properties of matter under unique conditions.
11 pages, 9 figures
References in corpus (8)
- Ultrarelativistic electron beam polarization in single-shot interaction with an ultraintense laser pulse
- Proton Acceleration in Underdense Plasma by Ultraintense Laguerre-Gaussian Laser Pulse
- Spin-polarized electron beam generation in the colliding-pulse injection scheme
- Polarized proton acceleration in ultra-intense laser interaction with near critical density plasmas
- Acceleration of spin-polarized proton beams via two parallel laser pulses
- Optimized laser ion acceleration at the relativistic critical density surface
- High-order corrections to the radiation-free dynamics of an electron in the strongly radiation-dominated regime
- Effect of Nozzle Curvature on Supersonic Gas Jets Used in Laser-Plasma Acceleration