IBA Dosimetry Product Detectors

CC04 Ionization Chamber

Conventional ionization chamber for measurements of small fields

The CC04 is the conventional ionization chamber for measurements of small fields and ranges with high dose gradients, e.g. stereotactic fields. CC04 is intended for absolute and relative dosimetry of photon, electron, and proton beams in radiotherapy. Measurements can be performed in air, water phantoms, or solid phantoms. CC04 is a high spatial resolution, small volume chamber. It is waterproof, vented through a waterproof sleeve, and fully guarded.

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IBA Dosimetry Radiation Product CC04
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Technical specs

Inner dimensions

  • Active volume: 0.04 cm3
  • Total active length: 3.6 mm
  • Cylinder length: 1.6 mm
  • Inner diameter of outer electrode: 4.0 mm
  • Wall thickness: 0.4 mm (70 mg/cm2 )
  • Diameter of inner electrode: 1.0 mm
  • Length of inner electrode: 2.1 mm

Operational characteristics

  • Polarizing voltage: ±300 V (max. ±500 V)
  • Typical leakage current: 3 fA
  • Recommended pre-irradiation: 5 Gy
  • Typical sensitivity: 1 nC/Gy
  • Guard potential: ±300 V (max. ±500 V)
  • Temperature range: 15 °C – 35 °C
  • Relative humidity range: 20 % – 80 %