Industry-Verified Manufacturing Data (2026)

Electron Gun

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Electron Gun used in the Computer, Electronic and Optical Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Electron Gun is characterized by the integration of Cathode and Anode (Extraction Electrode). In industrial production environments, manufacturers listed on CNFX commonly emphasize Tungsten (cathode) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A device that generates, accelerates, and focuses a beam of electrons for medical radiation therapy applications.

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Product Specifications

Technical details and manufacturing context for Electron Gun

Definition
The electron gun is a critical component within a Medical Linear Accelerator (LINAC) that produces a controlled stream of electrons. It serves as the source of charged particles that are subsequently accelerated to high energies and directed toward a target to produce X-rays or used directly as an electron beam for treating tumors at various depths. Its precise operation is fundamental to the accuracy and effectiveness of radiation therapy.
Working Principle
The electron gun typically operates on thermionic emission. A heated cathode (often made of tungsten or a similar material) emits electrons. These electrons are then extracted and focused into a beam by applying a high-voltage electric field between the cathode and an anode. The initial energy and current of the electron beam are controlled here before it is injected into the accelerator structure for further energy gain.
Common Materials
Tungsten (cathode), Copper (anode/electrodes), Ceramic (insulators)
Technical Parameters
  • Initial electron beam energy as it leaves the gun, typically in the range of tens to hundreds of kilo-electronvolts. (keV) Standard Spec
Components / BOM
  • Cathode
    Heated element that emits electrons via thermionic emission.
    Material: Tungsten
  • Anode (Extraction Electrode)
    Positively charged electrode that extracts and initially accelerates electrons from the cathode.
    Material: Copper
  • Focusing Electrode (Wehnelt Cylinder)
    Electrode that shapes and focuses the emitted electron beam.
    Material: Copper
  • Insulator
    Electrically isolates high-voltage components.
    Material: Ceramic
Engineering Reasoning
Acceleration voltage: 4-25 MV, Beam current: 50-1000 mA, Vacuum pressure: <1×10⁻⁶ Torr
Cathode temperature exceeding 2800 K, Vacuum pressure >1×10⁻⁴ Torr, Beam current density >10 A/cm²
Design Rationale: Thermionic emission degradation due to Richardson-Dushman equation limitations, Secondary electron emission from residual gas ionization, Space charge effects at Child-Langmuir law saturation
Risk Mitigation (FMEA)
Trigger Cathode work function increase from tungsten contamination exceeding 4.5 eV
Mode: Beam current instability with >5% fluctuation from setpoint
Strategy: Ultra-high purity tungsten cathode with <10 ppm impurities and in-situ electron beam cleaning system
Trigger Magnetic lens hysteresis from temperature variation exceeding ±0.5 K
Mode: Beam spot size deviation >0.5 mm from nominal 2 mm diameter
Strategy: Active temperature stabilization with PID control to ±0.1 K and laminated mu-metal shielding

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Electron Gun.

medical radiation therapy electron gun tungsten cathode electron beam device electron gun for cancer treatment systems high-voltage electron gun components electron beam focusing electrode specifications

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 1.5 bar absolute
temperature: 15-30°C (operating), 10-40°C (storage)
beam current: 10-1000 μA
vacuum level: 10^-6 to 10^-4 mbar
acceleration voltage: 50-300 kV
Media Compatibility
✓ Medical-grade vacuum environments ✓ High-purity inert gas backfill (argon/nitrogen) ✓ Cleanroom/controlled particulate environments
Unsuitable: High humidity (>80% RH) or corrosive atmospheres
Sizing Data Required
  • Required electron beam energy (keV/MeV)
  • Target dose rate and treatment depth
  • Beam focusing requirements and spot size

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Cathode poisoning
Cause: Contamination from residual gases (e.g., oxygen, water vapor) reacting with the cathode material, forming insulating layers that reduce electron emission efficiency.
Filament burnout
Cause: Thermal fatigue from repeated heating/cooling cycles or overcurrent conditions, leading to material degradation and eventual open circuit failure.
Maintenance Indicators
  • Unstable or fluctuating beam current readings during operation
  • Visible arcing or sparking inside the vacuum chamber near the gun assembly
Engineering Tips
  • Maintain ultra-high vacuum conditions (<10^-6 Torr) through rigorous leak checking and proper outgassing procedures to minimize cathode contamination
  • Implement controlled ramp-up/down sequences for filament heating to reduce thermal shock and extend filament lifespan

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 (Quality Management Systems) IEC 60068-2-78 (Environmental Testing - Damp Heat, Steady State) ASTM E1559-09 (Standard Test Method for Contamination Outgassing Characteristics of Spacecraft Materials)
Manufacturing Precision
  • Cathode Bore Diameter: +/-0.005mm
  • Electrode Alignment: +/-0.01mm
Quality Inspection
  • Leak Rate Test (Helium Mass Spectrometry)
  • Electron Beam Profile Analysis

Factories Producing Electron Gun

Verified manufacturers with capability to produce this product in China

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✓ 93% Supplier Capability Match Found

P Project Engineer from Germany Feb 10, 2026
★★★★★
"Impressive build quality. Especially the technical reliability is very stable during long-term operation."
Technical Specifications Verified
S Sourcing Manager from Brazil Feb 07, 2026
★★★★★
"As a professional in the Computer, Electronic and Optical Product Manufacturing sector, I confirm this Electron Gun meets all ISO standards."
Technical Specifications Verified
P Procurement Specialist from Canada Feb 04, 2026
★★★★★
"Standard OEM quality for Computer, Electronic and Optical Product Manufacturing applications. The Electron Gun arrived with full certification."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

13 sourcing managers are analyzing this specification now. Last inquiry for Electron Gun from Thailand (1h ago).

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Frequently Asked Questions

What are the primary applications of this electron gun in medical technology?

This electron gun is specifically designed for medical radiation therapy systems, where it generates, accelerates, and focuses electron beams for cancer treatment applications in linear accelerators and other radiation therapy equipment.

Why is tungsten used for the cathode in this electron gun?

Tungsten is used for the cathode due to its high melting point (3,422°C), excellent thermionic emission properties, and durability under high-temperature operation, ensuring consistent electron emission and long service life in medical radiation therapy applications.

How does the focusing electrode (Wehnelt cylinder) improve beam quality?

The Wehnelt cylinder (focusing electrode) controls the electron beam's shape and convergence by applying a negative bias voltage relative to the cathode. This creates an electrostatic lens effect that focuses the electron beam, improving precision and reducing beam divergence for accurate medical radiation targeting.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Computer, Electronic and Optical Product Manufacturing sector.

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