加速器物理：2025–2026 年度综述

An annual survey of the physics.acc-ph arXiv category, covering research published from September 2025 – August 2026. Built on a close-reading set of 108 papers and organised into 40 chapters, it maps the year by the field's research sub-directions.

Book framework (share of the year's output):

• Large-Scale Accelerator Commissioning and Magnet Systems (20.1%) — Focuses on commissioning large facilities like Fermilab and FAIR, utilizing advanced HTS magnet modeling, control systems, and machine protection strategies.
• Storage Ring Beam Dynamics and Synchrotron Radiation (15.4%) — Addresses beam stability, injection, and radiation diagnostics in storage rings, including novel light source generation and beam energy measurement techniques.
• Free-Electron Lasers and Attosecond X-ray Generation (12.6%) — Explores the generation and control of high-energy X-rays and attosecond pulses using free-electron lasers and inverse Compton scattering techniques.
• Future High-Energy Collider Design and Luminosity Optimization (11.0%) — Evaluates design options for future colliders (FCC, HL-LHC) and methods to maximize luminosity and manage beam interactions for hadron and lepton collisions.
• Space-Charge Effects and Phase-Space Dynamics (10.8%) — Investigates nonlinear beam dynamics, space-charge effects, and phase-space manipulation methods in high-intensity accelerator simulations and experiments.
• Laser and Plasma Wakefield Acceleration (10.1%) — Develops techniques for compact particle acceleration using laser-plasma interactions, focusing on wakefield optimization, injection control, and high-repetition-rate operation.
• Superconducting RF Cavity Surface Science and Performance (7.2%) — Examines surface preparation, defect analysis, and material properties of niobium SRF cavities to enhance gradient performance and reduce losses.
• Muon and Proton Beam Production and Applications (6.6%) — Covers the generation, cooling, and delivery of muon and proton beams for colliders, medical isotope production, and precision physics experiments.
• Low-Level RF Control and Digital Systems (6.3%) — Details the implementation of digital LLRF systems, FPGA-based control, and automated phase adjustment for stabilizing accelerator RF fields.

Each sub-direction is covered across three chapters — how it framed its questions, the strength of its key findings, and its open debates and frontiers — so the reader gets a traceable picture of what this part of the field actually produced over the year.