Large Hadron Colliders (LHC) and high-energy particle colliders are flagship mega‑science facilities for exploring microscopic matter structure, cosmic origins and fundamental physical laws. By accelerating and colliding high-energy particle beams, they generate new particles and physical phenomena. The detector system serves as the core module to capture particle tracks, measure energy/momentum and identify particle types, acting as the sole source of experimental physics data. The massive multi-channel high‑voltage power distribution system is critical infrastructure, providing ultra-precise biased high voltage for tracking detectors, calorimeters, muon detectors and TOF modules. A full-scale collider detector requires tens of thousands up to hundreds of thousands of independent high‑voltage channels, each dedicated to a specific detection unit. Output stability, inter-channel crosstalk, redundancy, fault isolation and long-term radiation reliability directly determine detection efficiency, energy resolution, position resolution and the validity of collision physics results.
Particle collider operation imposes extreme technical challenges far beyond conventional power systems: 1.Massive independent multi-channel control & ultra-low crosstalk: Up to hundreds of thousands of channels with adjustable voltage from hundreds to thousands of volts and power ranging from mW to tens of watts. Each channel needs independent regulation, closed-loop stabilization and full protection; inter-channel crosstalk must be lower than 0.01% to prevent data distortion caused by adjacent load variations or faults. Traditional centralized resistor-divider designs cannot support such scale and isolation performance. 2.Ultra-high stability & ultra-low noise: Semiconductor sensors, PMTs and MCPs are extremely sensitive to bias fluctuations. Long-term stability ≤±5 ppm/year, short-term stability ≤±1 ppm/8 hours, peak-to-peak ripple below 1 ppm, with outstanding EMI immunity against complex on-site electromagnetic interference. 3.Highest redundancy & autonomous fault isolation: Collider experimental cycles last for decades with continuous beam operation spanning months. Any power failure causes irreversible beam-time loss and data corruption. Full-link redundancy, microsecond-level autonomous fault detection and complete channel isolation are mandatory to ensure no global or partial detector shutdown from single-point failures. 4.Nanosecond multi-channel synchronization & high-precision monitoring: Collision events occur at nanosecond timescales. All voltage tuning, sampling and protection actions must achieve nanosecond synchronization. Per-channel voltage/current monitoring accuracy ≥±0.01% with sampling rate ≥100 kSPS to fully record pre‑ and post‑collision operating states for physics analysis. 5.Long-term resilience under extreme radiation: Detectors are located near collision points under intense high-energy particle irradiation. Total Ionizing Dose (TID) up to 10 Mrad(Si) and severe Single Event Effects (SEE) cause semiconductor drift and insulation aging. The system must maintain stable operation for decades under extreme radiation conditions. 6.Distributed layout & ultra-long-distance transmission: Detectors reach tens of meters in diameter and hundreds of meters in length. Power and control signals transmit over dozens to hundreds of meters, requiring strong anti-interference capability, compact integration inside confined detector volumes and strict radiation shielding compatibility. 7.Intelligent management & full-lifecycle traceability: Hundreds of thousands of channels demand centralized intelligent control, remote tuning, health evaluation and early fault warning. Full-lifecycle non-tamperable data recording supports physics analysis, maintenance traceability and long-term performance optimization.
This methodology establishes a full-process framework covering distributed redundant topology, multi-channel low-crosstalk optimization, full-link redundancy, autonomous fault isolation, radiation hardening and fiber synchronized control. It supports electron-positron colliders, hadron colliders and heavy-ion facilities, delivering standardized design principles for domestic core power system localization and high-end performance breakthroughs. To address ultra-large channel scale, ppm stability, full redundancy and extreme radiation tolerance, a universal two-stage distributed redundant architecture is adopted: centralized high-voltage main bus + distributed modular Point-of-Load (POL) high‑voltage converters, integrated with all-fiber synchronization and hierarchical fault management to eliminate traditional limitations of poor isolation, high crosstalk and low redundancy.
1.Front-end centralized high‑voltage bus unit: Adopts three-stage topology: three-phase PFC rectifier + multi-module parallel full-bridge LLC resonant isolation + high-precision filtering, delivering stable 1 kV–5 kV medium DC bus. Core principles: •Full ZVS/ZCS soft switching achieves peak efficiency ≥96%, minimizing thermal drift. •Ultra-stable dual closed-loop control provides long-term stability ≤±10 ppm/year and short-term stability ≤±2 ppm/8 hours as a global precision reference. •N+X redundant parallel modules (X≥2) support full load retention and hot-swap maintenance without beam interruption. •Multi-stage π filtering suppresses bus ripple below 1 ppm to avoid cross-coupling into POL outputs.
2.Rear-end miniature distributed POL converter array (per independent channel): Each detection channel integrates a compact POL module with GaN high-density packaging for localized installation near sensors, minimizing cable length and interference. Core principles: •Ultra-compact cm-level integration enables extreme channel density inside confined detector structures. •Fully isolated boost/buck topology offers continuous 0–full-bus adjustable output with precision ≤±0.01%. •Triple galvanic isolation achieves inter-channel resistance >10¹² Ω, restricting crosstalk below 0.01%. •Independent multi-stage low-ESR film capacitor filtering reduces final ripple ≤1 ppm; soft switching eliminates high-frequency noise. •Ultra-low static power consumption<10 mW per channel optimizes overall system power budget for massive-scale deployment.
3.Full-link hierarchical redundancy design: •Central bus: N+2 redundancy guarantees stable operation even with two modules failing simultaneously. •POL channel: 1+1 dual hot-redundant configuration with high-voltage isolation diodes achieves seamless switching within 1 μs and voltage fluctuation<0.1% during failover. •Power, control and communication: Dual-grid input, redundant fiber ring networks and dual-port POL communication eliminate single-point failures across the entire signal chain.
4.Four-tier hierarchical fault isolation: •Channel-level: Independent hardware protection and high-voltage disconnection within 1 μs fully isolate faulty channels. •Module-level: Per-module fuses and switches contain faults inside local subassemblies. •Subsystem-level: Independent bus and interlocks segment large detector regions to prevent cascading failures. •System-level: Global emergency high‑voltage cut protects the entire detector under critical risk conditions.
5.All-fiber nanosecond synchronous control network: •Global oven-controlled crystal clock distributes synchronized timing with system-wide accuracy ≤10 ns for unified tuning, sampling and protection. •Dual redundant fiber ring networks achieve automatic reconstruction within 50 ms, supporting hundreds of meters interference-free signal transmission. •Three-tier intelligent architecture: Central host for global management, regional controllers for area synchronization, and local FPGA-based POL controllers for ultra-fast per-channel closed-loop response.
6.Extreme radiation hardening (10 Mrad(Si)): Implements a three-tier radiation-resistant system: •Component-level: Aerospace rad-hard semiconductors with TID ≥1 Mrad(Si) and SEE immunity LET ≥80 MeV·cm²/mg. •Circuit-level: Triple Modular Redundancy (TMR) and ECC eliminate single-event upsets; critical circuits apply strict radiation drift compensation. •System-level: Tungsten alloy shielding enclosures protect sensitive control electronics inside high-radiation detector zones.
7.Standardized modular scalability: All bus modules, POL units and controllers adopt unified mechanical, electrical and communication interfaces for flexible channel expansion and hot-swap replacement, matching decades-long collider maintenance cycles.
Ultra-high stability and ultra-low noise optimization guarantee physics-grade resolution: •Ultra-low-drift bandgap references with TC<0.2 ppm/℃ and precision thermal stabilization maintain invariant reference voltage. •24-bit Σ-Δ ADC sampling with triple redundant voting and ultra-stable metal-foil resistors ensures drift-free high-precision acquisition. •Local FPGA digital control with feedforward, temperature, aging and radiation compensation achieves transient response <10 μs and long-term stability ≤±5 ppm/year. •Multi-layer magnetic/electric shielding and isolated star-point grounding eliminate ground-loop noise; coaxial high‑voltage cabling suppresses external electromagnetic coupling.
Full-lifecycle intelligent health management supports decades of continuous operation: •Real-time full-parameter monitoring synchronized with beam events records complete pre‑collision and post‑collision channel status. •AI-powered diagnostic systems evaluate health grades, predict degradation trends and issue early warnings for preventive maintenance. •Tamper-proof distributed storage archives up to 30 years of operating logs, calibration data and fault records for complete physics-data traceability and equipment provenance.
In conclusion, this integrated framework solves fundamental bottlenecks of traditional collider power systems. The distributed POL architecture supports hundreds of thousands of independent channels with crosstalk<0.01%; full-link redundancy enables failure-free long-term operation; multi-level radiation hardening ensures decades of stability under 10 Mrad(Si); ultra-precise digital control delivers ppm-class long-term stability. Widely applicable to hadron colliders, lepton colliders, heavy-ion facilities and synchrotron radiation detectors, it provides core independent technology for major domestic mega-science particle physics projects.