NACP Plane Parallel Chamber
NACP can be used for proton beam absolute and relative dosimetry and for photon beam depth-dose measurements.
NACP is designed according to recommendations of the Nordic Association of Clinical Physicists (NACP), Acta Radiologica Oncology 19,55. The chamber is used for absolute dosimetry of electron beams 2-50 MeV. A thinner front wall minimizes contamination of the beam, allows measurements at shallow depths, and guarantees high accuracy even at low electron energies.
The collecting electrode is manufactured of graphitized polystyrene. The NACP chamber cable is covered by a watertight silicone sleeve that allows for air ventilation.
Used for Workflow
Detectors RT
Features
Inner dimensions
- Sensitive volume (nominal): 0.16 cm3
- Cylinder height: 2.0 mm
- Entrance window (polarizing electrode) diameter: 20 mm
- Entrance window thickness: mylar foil 0.1 mm & graphite 0.5 mm
- Diameter of collecting electrode: 10.0 mm
- Guard ring outer diameter: 18 mm
- Guard ring width: 3.0 mm
Operational characteristics
- Polarizing voltage: ±200 V (max. ±400 V)
- Typical leakage current: 5 fA
- Recommended pre-irradiation: 5 Gy
- Typical sensitivity: 6 nC/Gy
- Guard potential: ±200 V (max. ±400 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.
Find more resources here
Brochures
DETECTORS - For Relative and Absolute Dosimetry
