Irises: Frequency Range 1-40 GHz, VSWR <1.2:1

Q: What is the primary function of an iris in an accelerating waveguide?

The primary function is to control the electromagnetic field distribution and phase velocity to ensure efficient energy transfer to charged particles, maintaining beam stability and acceleration efficiency.

Q: How do irises affect waveguide performance?

Irises adjust impedance matching, reduce reflections (VSWR), shape field patterns, and can create resonant cavities for specific frequency operations, directly impacting bandwidth, power handling, and system efficiency.

Component Specifications

Definition

Irises are metallic diaphragms with precisely shaped apertures inserted perpendicularly into accelerating waveguides. They function as impedance-matching elements, resonant cavities, or field-shaping devices by creating controlled discontinuities in the waveguide cross-section. Their geometry (circular, rectangular, or custom shapes) determines the electromagnetic field patterns, phase velocity, and power handling capabilities within the waveguide system.

Working Principle

Irises operate by introducing a controlled impedance discontinuity in the waveguide, which reflects and transmits portions of the electromagnetic wave. This alters the phase velocity, field distribution, and resonant characteristics. In accelerating waveguides, irises help maintain the correct phase relationship between the RF field and particle beam, ensuring efficient energy transfer and beam stability.

Materials

High-conductivity oxygen-free copper (C10100/C10200), aluminum alloys (6061-T6), or stainless steel (304/316) with silver or gold plating for enhanced surface conductivity and corrosion resistance.

Technical Parameters

Parameter	Typical range	Notes & selection driver
VSWR	<1.2:1
Power Handling	Up to 5 MW peak
Frequency Range	1-40 GHz
Surface Roughness	Ra ≤ 0.4 μm
Aperture Tolerance	±0.01 mm
Operating Temperature	-40°C to +150°C

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 9001, IEC 60153, MIL-DTL-3922

Parent Products

This component is used in the following industrial products

Accelerating Waveguide

A specialized waveguide component within a medical linear accelerator that guides and accelerates electrons to produce high-energy X-rays for radiation therapy.

View Product Details

Engineering Analysis

Risks & Mitigation

Thermal deformation under high power
Impedance mismatch due to manufacturing tolerances
Corrosion or oxidation affecting surface conductivity
Mechanical stress from thermal cycling

FMEA Triads

Trigger: Poor material conductivity or surface plating degradation
Failure: Increased insertion loss and reduced power efficiency
Mitigation: Use high-conductivity materials with protective plating; implement regular conductivity testing and maintenance.

Trigger: Geometric inaccuracies in aperture dimensions
Failure: Impedance mismatch leading to reflected power and system instability
Mitigation: Apply precision machining with tight tolerances; use coordinate measuring machines (CMM) for quality verification.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.01 mm on critical dimensions, ±0.5° on angular alignment

Test Method

Vector network analyzer (VNA) measurements for S-parameters, coordinate measuring machine (CMM) for dimensional verification, helium leak testing for vacuum integrity.

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

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

Manufacturers of Irises

Manufacturer profiles associated with Irises.

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Frequently Asked Questions

What is the primary function of an iris in an accelerating waveguide?