PPC05 Plane Parallel Chamber

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 Machine/Modality/Application:

C-arm linacs,

Bore-type linacs,

Synchro-Cyclotron,

Cyclotrons,

Proton Therapy,

Carbon Compatible

Used for Workflow

Commissioning and Annual QA PT,

Commissioning and Annual QA RT,

Detectors RT,

Monthly QA RT,

Monthly QA PT

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Features

Outer dimensions

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

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

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 %

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

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 graphized

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
Brochures (2 MB)
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