Conveners
WG10: ALEGRO towards colliders
- Brigitte CROS (LPGP-CNRS-UP11)
- Rajeev Pattathil (Rutherford Appleton Laboratory)
Accelerating particles to high energies with high efficiency and beam quality is crucial in developing accelerator technologies. While particle acceleration in plasmas has made important progress for electrons, identifying a reliable plasma acceleration technique for positrons would pave the way to a linear collider for high-energy physics applications.
Here, we show that a tradeoff...
The filament regime is a promising candidate for the acceleration of positron beams in plasma because it is emittance-preserving and stable to transverse offsets [Diederichs et al, PRAB 25, 091304 (2022), Diederichs et al, PRAB 23, 121301 (2020]. Beam loading dynamics limit the maximum amount of energy that can be extracted from the wake by the trailing positron bunch. We explore efficiency...
A long driver forming a decelerating plateau in a plasma wakefield is required for maximizing the acceleration efficiency and energy gain of a witness beam. Maximizing the efficiency of the acceleration process by injecting a large witness charge, requires a tailored, long witness beam creating a beam-loaded plateau in the accelerating field. As a consequence, in the case of the highest...
Proton-driven plasma wakefield acceleration may allow to accelerate electrons to TeV energies in a single plasma stage. The concept is developed using the AWAKE facility, which already demonstrated electron acceleration to GeV energies over 10 m of plasma during Run 1. In 2022, AWAKE started Run 2, where the goal is to: 1) demonstrate stable accelerating gradients of 0.5–1 GV/m, 2) accelerate...
It is likely that the achievement of electron beam energies significantly above 10 GeV with plasma wakefield acceleration will require the successful coupling of multiple independent stages. To maintain a high average acceleration gradient over the full length of the accelerator it is critical that the space used to couple the driver into the plasma is kept as compact as possible, and in this...
The electromagnetic Particle-In-Cell (PIC) code WarpX has been developed within the the U.S. Department of Energy’s Exascale Computing Project toward the modeling of plasma accelerators for future high-energy physics colliders on Exascale Supercomputers. The code can be used for start-to-end modeling of plasma-based colliders, from beams’ creation to their acceleration in chains of stages to...
We discuss how ready the field is to deliver the parameters needed to realize a 500 GeV PWFA electron linac for the HALHF collider. Using the current, tentative HALHF linac parameter set, we investigate in a systematic manner the difference between the the required collider parameters, including beam quality, efficiency and plasma-cell parameters, and the corresponding performance demonstrated...
