QA in air and low dose in water measurements
The ionization chamber CC25 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. The CC25 is a high spatial resolution, small volume chamber. It is waterproof, vented through a waterproof sleeve, and fully guarded.
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Detector Brochure
Technical specs
Inner dimensions
- Active volume: 0.25 cm3
- Total active length: 10 mm
- Cylinder length: 7 mm
- Inner diameter of outer electrode: 6.0 mm
- Wall thickness: 0.4 mm (70 mg/cm2 )
- Diameter of inner electrode: 1.0 mm
- Length of inner electrode: 7.5 mm
Operational characteristics
- Polarizing voltage: ±300 V (max. ±500 V)
- Typical leakage current: 5 fA
- Recommended pre-irradiation: 5 Gy
- Typical sensitivity: 7.5 nC/Gy
- Guard potential: ±300 V (max. ±500 V)
- Temperature range: 15 °C – 35 °C
- Relative humidity range: 20 % – 80 %
Publication:
Explore Magnetic Field Quality: Experimental Determination of Conversion Factors for MR-Linac Systems