PPC05 is a parallel plate ionization chamber for absolute and relative dosimetry of electron beams (≥2 MeV), as well as photon and proton beams, measuring absorbed dose to water. PPC05 features air-equivalent Shonka C552 plastic, graphitized PEEK electrodes, and a circular planar-sensitive volume with a 1 mm thick entry window. With a 0.6 mm plate spacing, 9.9 mm diameter, and a 3.4 mm guard ring, it provides high-resolution depth dose measurements and is waterproof with a vented design.
Compatible with: C-arm linacs, Bore-type linacs, Synchro-Cyclotron, Cyclotrons, Proton Therapy, Carbon Compatible
Used for: Commissioning PT, Annual QA PT, Commissioning and Annual QA RT, Detectors RT, Monthly QA RT, Monthly QA PT
Features
Outer dimensions
- Chamber outer diameter: 30.0 mm
- Chamber body height: 14.0 mm
- Stem diameter: 8.5 mm
- Stem length: 38.0 mm
Inner dimensions
- Sensitive volume (nominal): 46.0 mm³
- Cylinder height: 0.6 mm
- Entry window (polarizing electrode) diameter: 20.0 mm
- Entry window thickness: 1.0 mm (0.176 g/cm²)
- Diameter of collecting electrode: 9.9 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: 1.7 nC/Gy
- Guard potential: ±300 V (max. ±500 V)
- Temperature range: +15 – +35 °C
- Relative humidity range: 20 % – 80 %
Technical specifications
- PPC05 — Materials: Window and body C552; graphitized (PEEK) electrode; Window thickness [mg/cm²]/[mm]: 176 / 1; Active volume [cm³]: 0.05; Electrode spacing [mm]: 0.5; Collecting electrode diameter [mm]: 10; Guard ring width [mm]: 3.5; Waterproof: Y
- PPC40 — Materials: PMMA; Window thickness [mg/cm²]/[mm]: 118 / 1; Active volume [cm³]: 0.4; Electrode spacing [mm]: 2; Collecting electrode diameter [mm]: 16; Guard ring width [mm]: 4; Waterproof: Y
- NACP — Materials: Mylar foil and graphite window; body PMMA; electrode graphized; Window thickness [mg/cm²]/[mm]: 104 / 0.6; Active volume [cm³]: 0.16; Electrode spacing [mm]: 2; Collecting electrode diameter [mm]: 10; Guard ring width [mm]: 3; Waterproof: Y
Technical data is subject to change without prior notice.
