Aolong ChiRad 4000 Biological X-ray Irradiator

Overview

The Aolong ChiRad 4000 Biological X-ray Irradiator is a fully self-shielded, laboratory-grade X-ray irradiation system engineered for precise, reproducible, and regulatory-compliant dose delivery in life science and pharmaceutical applications. Unlike radioisotope-based irradiators (e.g., ¹³⁷Cs or ⁶⁰Co sources), the ChiRad 4000 employs a high-stability, air-cooled X-ray tube operating at up to 50 kV and 60 mA — generating bremsstrahlung radiation with controllable energy spectrum and intensity. Its design eliminates reliance on radioactive decay kinetics, ensuring consistent dose rate performance over time without calibration drift due to source half-life decay. The system conforms to IEC 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and meets national occupational radiation safety limits (≤0.5 µSv/h at 5 cm), verified under maximum power operation. It is intended for non-clinical, ex vivo irradiation of biological samples including herbal medicine slices (Chinese medicinal materials), food products, cell suspensions, tissue explants, and microbial cultures.

Key Features

• Self-shielded lead-lined cabinet (≥5 mm Pb equivalent) with interlocked access door and mechanical/electrical dual safety interlock circuitry.
• Industrial-grade rotating anode X-ray tube with integrated beam filtration to optimize spectral quality and minimize low-energy scatter — enhancing dose uniformity and reducing off-target absorption.
• Motorized precision turntable (30 cm diameter) synchronized with real-time dose monitoring, achieving ≥95% irradiation field homogeneity across sample volume.
• Dedicated closed-loop chiller system maintaining stable tube thermal load, critical for sustained high-dose-rate operation (up to 120 Gy/min) and long-term dosimetric repeatability.
• Ozone exhaust ventilation integrated into the irradiation chamber, actively removing ozone generated during X-ray interaction with ambient air — protecting operator health and preserving sample integrity.
• Windows-based human-machine interface with 10.1″ capacitive touchscreen, supporting programmable exposure protocols, audit-trail-enabled session logging, and user-defined parameter presets.
• Stainless-steel irradiation chamber (304 grade) with smooth, non-porous surfaces for easy decontamination and compliance with GLP/GMP cleanroom-compatible handling requirements.

Sample Compatibility & Compliance

The ChiRad 4000 accommodates diverse sample formats: unpackaged or sealed vials (1–50 mL), Petri dishes (up to 150 mm), multi-well plates, herbal slices in trays, and small-volume food matrices. Its adjustable SSD (5–30 cm) and variable collimation support both high-throughput batch processing and targeted micro-irradiation. The system supports dose validation per ISO/IEC 17025-accredited dosimetry practices using calibrated alanine or radiochromic film dosimeters. It is suitable for research-use-only (RUO) applications aligned with FDA 21 CFR Part 11 data integrity expectations when configured with electronic signature and audit trail functionality. While not a medical device, its performance characteristics meet ASTM F1980 (accelerated aging of sterilization packaging) and ISO 11137 (radiation sterilization of health care products) foundational principles for process qualification.

Software & Data Management

The embedded Windows OS platform provides intuitive workflow control via a graphical irradiation scheduler, real-time dose rate display, and cumulative dose tracking. All exposure parameters — voltage, current, time, SSD, and turntable speed — are logged with timestamp, operator ID, and system status flags. Exportable CSV reports include raw sensor readings, dose calculations (Gy), and error codes. Optional software modules enable remote monitoring via Ethernet, integration with LIMS, and automated report generation compliant with ALCOA+ (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) data governance standards.

Applications

• Inactivation of endogenous microbes in traditional Chinese medicine (TCM) decoction pieces without thermal degradation or chemical residue.
• Pre-sterilization treatment of cell culture reagents, sera, and scaffolds prior to stem cell or immunology experiments.
• Dose-response studies in radiobiology (e.g., DNA damage assays, clonogenic survival, apoptosis induction).
• Food safety research: pathogen reduction (e.g., Salmonella, E. coli) in dried herbs, spices, and nut-based formulations.
• Material compatibility testing of pharmaceutical packaging under ionizing radiation stress conditions.

FAQ

Is the ChiRad 4000 certified for use in regulated GxP environments?
Yes — when deployed with validated software configuration and documented operational qualification (OQ), it supports GLP and GMP-aligned workflows. Full traceability, electronic signatures, and audit logs are configurable per 21 CFR Part 11 requirements.
What dosimetry standards does it support?
It is compatible with ISO/ASTM 51275 (alanine dosimetry), ISO/ASTM 51702 (radiochromic film), and ISO/ASTM 51649 (routine reference dosimetry) — provided users employ NIST-traceable calibration services.
Can it replace cobalt-60 irradiators for TCM sterilization?
For non-commercial, R&D-scale processing of herbal slices (<5 kg/batch), yes — with equivalent microbial log-reduction performance and superior dose control. Regulatory approval for commercial sterilization requires separate process validation per local health authority guidelines.
Does it require external radiation shielding or dedicated facility modification?
No — the fully shielded cabinet meets international leakage radiation limits without additional room shielding. Installation only requires standard 220 V/30 A single-phase power and adequate ventilation for chiller heat dissipation.
How is maintenance performed and what is the expected tube lifetime?
The X-ray tube is rated for ≥5,000 hours of operation under recommended cooling and duty cycle. Preventive maintenance includes quarterly ozone filter replacement, annual chiller coolant flush, and biannual dosimeter calibration verification — all supported by Aolong’s technical service network.