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The IPLUS dosimeter complies with EN62387-1:2012 standards for passive integrating dosimetry systems for personal and environmental measurement suitable for monitoring photon and beta radiation.

 

How does OSL technology work?

Wearing the dosimeter - Electrons are trapped in OSL material when exposed to radiation.

Read-out process - Trapped electrons are freed through stimulation with light.

Advantages of the Optical Stimulated Luminescence (OSL)

Detect lower levels of exposure

Limited environmental effects

Control dosimeter provided to measure background radiation

Re-analysis capabilities for improved accuracy

Low fading - can still obtain accurate readings from dosimeters returned late

Technical characteristics

 

Photons

Beta

Personal dose equivalent

Hp(10) and Hp(0.07)

Hp(0.07)

Dose range

0.05 mSv to 10 Sv

 

Linearity response

0.05 mSv to 10 Sv - Standard deviation < to 5 %

 

Measurement reproducibility

5 %

 

Energy response

(mean energy)

Hp(10): 15 keV to 6 MeV (Emax = 18 MeV)

Hp(0.07): 15 keV à 1,33 MeV

250 keV to 1 MeV (Emax = 2.2 MeV)

Energy dependency

Weak, < 11 % of 16 keV at 6 MeV

 

Angular response

(horizontal and vertical angles)

± 60° from 15 keV

± 45° from 250 keV

Angular dependency

Average deviation < 6 %

 

Fading

< 1.5 % / month

 

Neutrons detection

Insensitive to neutrons

 

Environmental characteristics 

Operating and storage temperature

-10 °C to 40 °C

Humidity

0 % to 90 %

Light exposure

Tested up to 1,000 W/m2

The work horse (OSL Reader)

The Landauer OSLR 5O reader utilizes a High-Powered Light Emitting Diode (LED) AND Pulsed Optically Stimulated Luminescence (P-OSL) technology to achieve better separation between the optical stimulation spectra (green region):

Uses LED (Light Emitting Diode) to stimulate the detectors

Light emitted is measured by a photomultiplier tube (PMT) using a high sensitivity photon counting system.

Amount of light released during optical stimulation is directly proportional to the radiation dose.

A dose equivalent estimation algorithm is applied to the measurement.