Target disc: Thermal Capacity 200-800 kJ, Diameter 50-200 mm

Component Specifications

Definition

The target disc is a precisely engineered rotating anode component within X-ray generation systems, typically made from high-density refractory metals. It serves as the focal point where high-energy electron beams impact, converting kinetic energy into X-ray photons through bremsstrahlung and characteristic radiation processes. The disc's rotation distributes thermal load across its surface, preventing localized overheating and enabling higher power operation.

Working Principle

When high-voltage accelerates electrons toward the target disc, their kinetic energy converts to X-rays upon impact. The rotating design spreads heat over a larger surface area, allowing continuous operation without thermal damage. Different target materials produce specific X-ray spectra based on atomic number and electron configuration.

Materials

Tungsten-rhenium alloys (W-Re), molybdenum (Mo), or copper (Cu) with tungsten facing. Common compositions: W-5%Re, W-10%Re. Purity: 99.95% minimum. Density: 17-19 g/cm³ for tungsten alloys.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	50-200 mm
Thickness	3-10 mm
Maximum Power	50-150 kW
Rotation Speed	3000-10000 rpm
Surface Finish	Ra ≤ 0.8 μm
Focal Spot Size	0.1-2.0 mm
Thermal Capacity	200-800 kJ

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 16526, DIN 6836, IEC 60522

Parent Products

This component is used in the following industrial products

X-ray Target

A component in a medical linear accelerator that generates X-rays when bombarded by high-energy electrons.

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Engineering Analysis

Risks & Mitigation

Thermal stress cracking
Surface pitting from electron bombardment
Bearing failure in rotation mechanism
Cooling system malfunction

FMEA Triads

Trigger: Insufficient cooling or excessive power
Failure: Thermal deformation or melting of target surface
Mitigation: Implement temperature monitoring, automatic power reduction, and enhanced cooling systems

Trigger: Material fatigue from thermal cycling
Failure: Crack propagation leading to disc fracture
Mitigation: Use fatigue-resistant alloys, implement gradual heating/cooling cycles, regular non-destructive testing

Trigger: Bearing wear or lubrication failure
Failure: Irregular rotation causing uneven heating
Mitigation: Scheduled bearing replacement, vibration monitoring, proper lubrication maintenance

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.05 mm diameter, ±0.01 mm thickness, ±0.5° angular alignment

Test Method

Radiographic inspection, thermal cycling tests, dimensional verification, material composition analysis

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Target disc

Manufacturer profiles associated with Target disc.

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Frequently Asked Questions

Why does the target disc rotate in X-ray tubes?

Rotation distributes heat across the disc surface, preventing localized melting and enabling higher power operation by improving thermal dissipation.

What materials are best for target discs?

Tungsten-rhenium alloys are preferred for their high atomic number (efficient X-ray production), high melting point, and thermal conductivity. Rhenium improves ductility and reduces cracking.

How often should target discs be replaced?

Typical lifespan is 10,000-50,000 operating hours depending on usage patterns, cooling efficiency, and maintenance. Regular inspection for surface degradation is recommended.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Target disc