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Machine QA

Exradin® A11TW Ion Chamber, Spokas Thin Window Parallel Plate, 0.93cc

Tailored for use in superficial therapy and low energy diagnostic beams. The thin-window design provides nearly constant response over the entire diagnostic energy range.

Exradin® A11TW Ion Chamber, Spokas Thin Window Parallel Plate, 0.93cc part of complete solution for: Absolute Dosimetry

Collecting Volume

  • 0.92 cm3

Nominal Calibration Factor

  • 3.4 R/nC

Centroid of Collecting Volume

  • 1.5 mm from top of window

Collector Diameter

  • 20.0 mm

Window-Collector Gap

  • 3.0 mm

Window

  • Polyimide film, 3.86 mg/cm2

Window Support Rings, Collector, and Guard Material

  • A11TW - Shonka Air-Equiv. plastic C552
  • P11TW - Polystyrene-Equiv. plastic D400
  • T11TW - Shonka Tissue-Equiv. plastic A150

Included Waterproofing Cap

  • Wall thickness of 1.0 mm; constructed of acrylic; TG-51 compliant

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