256 Strip QC Ion Chamber

The largest ionization chamber available. Ideal for beam position readback at isocenter. Sized to fit the entire scanning field without having to reposition it.


  • Large 45 cm by 45 cm sensing area
  • Alignment marks on beam entrance window for accurate optical setup at isocenter
  • Can be imaged by X-ray patient imager for accurate alignment to patient coordinate system
  • Lightweight and robust
  • 256 1.75 mm strips in each axis
  • Robust carbon-fiber windows and precision photo-etched readout electrodes on thin FR4 substrates for low-scattering
  • High voltage sense loopback


  • Particle therapy spot position calibration
  • Particle therapy system commissioning
  • Particle therapy system QA
  • High energy ion beam diagnostics

Expertly Built

Electrodes patterned with unique laser technology. Assembled and tested by highly skilled technicians in our dedicated assembly facility.

  • Rigorously tested beyond normal operating range to ensure uniformity
  • Envirmonmental sensor measured against externally calibrated sources
  • Each ion chamber is fully retested after it has been opened
  • Real calibrated radioactive source is used as reference
  • Full test documentation can be provided for each individual instrument

Integrated Environment Sensors

Our ion chambers include integrated sensors for environmental corrections. No need for costly and inconvenient external instruments.

  • Humidity sensor
  • Temperature sensor
  • Pressure sesnor
  • Replacable desiccant

Thin-film Strip Detector

Strip detectors have a balance between accuracy on beam position and noise levels. Our strip detectors offer the highest resolution and lowest noise on the market.

  • Laser-machined polyimide electrode substrates
  • Absolute minimal beam scattering
  • Radiation hard
  • High geometric precision
  • Gold plated readout electrodes

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