Sun Nuclear reference class ionization chambers are optimal tools for scanning, field, and reference dosimetry measurements.


Meet Requirements
Properly QA your linac, in accordance with the reference class and dosimetry protocols of IEC 60731, AAPM TG-51, and IAEA TRS-398.

Reliable & Accurate
Reference-class ion chambers are vented, waterproof and fully guarded. A white chamber body makes visualization easy during setup and relative to cross hairs and lasers.


SNC125c for Reference Class Dosimetry
With a design that reduces the convolution of high-dose gradient regions during profile and depth measurements, SNC125c meets IEC 60731 standards and more:

  • Enhanced penumbra without loss of signal strength
  • Optimized to work with 3D SCANNER™
  • Maintains ideal orientation during scans
  • Sensitivity of a 0.125 cm3 chamber and penumbra closer to a micro-chamber

Download the SNC125c datasheet >

SNC350p for Electron Reference Dosimetry
This parallel-plate ion chamber is well-guarded to minimize perturbation effects for reference, field, and scanning dosimetry of therapeutic electron beams, and TDD/TPS commissioning and QA.

  • Supports absolute or relative dose point measurements and PDD measurements
  • Conforms to the design principles as stated by Dr. M. Roos et al. (IAEA TRS-381)
  • Meets AAPM TG‑51 and IAEA TRS‑398 requirements for low‑energy beams (< 10MeV)
  • Meets reference-class dosimeter standards of performance (IEC 60731), and may be used to cross calibrate field-class dosimeters

Download the SNC350p datasheet >

SNC600c for Photon and Electron Reference Dosimetry
SNC600c is a reference class dosimeter based on the classic Farmer Chamber design.

  • Reference class performance (IEC 60731) allows for use in X-ray and electron reference dosimetry protocols - TG-51 and TRS-398
  • Classic Farmer Chamber design allows use in most slab phantoms
  • White thimble provides easy setup verification

Download the SNC600c datasheet >


Incorporate these proven chambers into your dosimetry protocols.


The SNC125c has the sensitivity of a 0.125 cm3 penumbra closer to a micro chamber.

6MeV 100 x 100 mm chamber comparison of SNC350p to Roos® Electron Chamber

20 MeV 100 x 100 mm chamber comparison of SNC350p to Roos Electron Chamber

6MV 100 x 100 mm chamber comparison of SNC600c to PTW 30013

18MV 100 x 100 mm chamber comparison of SNC600c to PTW 30013



Specifications

SNC125c™ Device Specifications

Active Volume (cm3)

0.108

Active Length (mm)

7.05

Active Diameter (mm)

4.75

Sensitivity (nC/Gy)

3.4

Wall Material

Paint 0.05 mm
PMMA 0.30 mm
Graphite 0.25 mm

Electrode

0.8 mm diameter aluminum

Vented

To atmosphere through waterproof tubing

Waterproofing

Viton tubing

Polarizing Voltage

±400V Max

Cable Length (m)

1.5

Cable Connector

TNC or BNC

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SNC600c™ Device Specifications

Active Volume (cm3)

0.6

Active Length (mm)

22.7

Active Diameter (mm)

6.1

Sensitivity (nC/Gy)

20

Wall Material (mm)

Paint 0.05
Graphite 0.43

Energy Range

Co-60 - 25 MV
9 MeV - 25 MeV

Electrode (mm)

1.1 diameter aluminum

Vented

To atmosphere through waterproof tubing

Waterproofing

Viton tubing

Buildup Cap (mm)

4.5

Polarizing Voltage

±400V Max

Length (m)

1.5

Cable Connector

TNC or BNC

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SNC350p™ Device Specifications

Sensitive Volume (cm3)

0.388

Entrance Window (mm)

0.05 Paint
1.00 PMMA
0.02 Carbon

Reference Point (mm)

1.0 Below Window Surface

Collection Volume Height (mm)

2.0

Collector Diameter (mm)

15.6

Guard Ring Width (mm)

4.1

Polarity Effect

Within 1.000 (±) 0.01

Waterproofing

Viton tubing

Max Dose Rate for (Gy/s)

≥ 99.5 % Saturation

5.2

≥ 99.0 % Saturation

10.4

Max Dose Per Pulse for (mGy)

≥ 99.5 % Saturation

0.46

≥ 99.0 % Saturation

0.92

Radiation Quality

Photons: Co-60 to 25 MV
Electrons: 5 MeV to 25 MeV

Field Size (mm)

Minimum: 40 x 40
Maximum: 400 x 400

Sensitive Volume (cm3)

0.388

Entrance Window (mm)

0.05 Paint

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