PPC40 Plane Parallel Chamber
PPC40 is a parallel plate ionization chamber for absolute and relative dosimetry of electron (≥2 MeV) and proton beams, as well as photon depth-dose measurements.
Made entirely of PMMA with graphitized electrodes, PPC40 features a circular planar-sensitive volume with a rigid 1 mm entrance window. Waterproof with a ventilated silicone-covered cable, it is ideal for precise absolute dose determinations in reference dosimetry and equipment setup.
Used for Workflow
Commissioning PT,
Detectors RT,
Monthly QA RT,
Monthly QA PT,
Annual QA PT,
Commissioning and Annual QA RT
Features
Outer dimensions
- Chamber outer diameter: 44.0 mm
- Chamber body height: 10.0 mm
- Stem diameter: 10.0 mm
- Stem length: 50.0 mm
Inner dimensions
- Sensitive volume (nominal): 0.40 cm3
- Cylinder height: 2.0 mm
- Entrance window (polarizing electrode) diameter: 20.0 mm
- Entrance window thickness: 1.0 mm
- Diameter of collecting electrode: 16.0 mm
- Guard ring diameter: 17.8 mm
- Guard ring width: 3.4 mm
Operational characteristics
- Polarizing voltage: ±300 V (max. ±500 V)
- Typical leakage current: 5 fA
- Recommended pre-irradiation: 5 Gy
- Typical sensitivity: 11 nC/Gy
- Guard potential: ±300 V (max. ±500 V)
- Temperature range: 15 to 35 °C
- Relative humidity range: 20 % to 80 %
Technical specifications
Chamber | Materials | Window thickness [mg/cm²]/[mm] | Active volume [cm³] | Electrode spacing [mm] | Collecting electrode diameter [mm] | Guard ring width [mm] | Waterproof |
|---|---|---|---|---|---|---|---|
PPC05 | Window and body C552; graphitized (PEEK) electrode | 176 / 1 | 0.05 | 0.5 | 10 | 3.5 | Y |
PPC40 | PMMA | 118 / 1 | 0.4 | 2 | 16 | 4 | Y |
NACP | Mylar foil and graphite window; body PMMA; electrode graphitized | 104 / 0.6 | 0.16 | 2 | 10 | 3 | Y |
Technical data is subject to change without prior notice. Depicted product images and specifications may differ from the actual scope of delivery.
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Brochures
DETECTORS - For Relative and Absolute Dosimetry
