Multi-functional radiation monitor


Technology abstract

A Dutch company, specialized in advanced measurement equipment, developed a multi-functional radiation monitor that measures the direction and energy of ionizing radiation. It provides identification of electrons, protons, ions and gamma-ray photons. The instrument provides energy and angular reconstruction of all incoming particles over a large continuous energy range, allowing it to reconstruct the radiation environment in detail.

- Private group -

- Derk Schneemann -

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Technology Description

This monitor allows for fast and accurate measurements of a radiation environment with a single instrument. It is much smaller and simpler than other (combinations of) instruments that perform the same measurement. This provides significant cost savings and additional information in the application domains mentioned below.

Innovations & Advantages

The multifunctional radiation monitor is originally developed as a radiation monitor to be used on board of spacecraft. Instead of the traditional dose measurement only, it provides also particle identification, energy spectra and the direction of the particles. On top of dosimetry this gives detailed information about the radiation environment of the spacecraft as well.
In contrast to other radiation monitors, this monitor cannot only determine the energy, but also the nature of the particle, e.g. discriminate between electrons, protons, ions and gamma-ray photons. Furthermore it can determine the direction from which the charged particles originate, thereby providing an image of the radiation environment.

Further Information

Recognized particles: γ, e, p, 3He, 4He, C, N, O, Ne
Energy range γ rays: 0.1 to 3 MeV
electrons: 1 to 20 MeV
protons: 1 to 200 MeV
alphas: 5 to 400 MeV
Energy resolution:
1) γ rays : 10%
2) electrons: 20%
3) protons and alphas: < 5%
Aperture: 45°
Angular resolution: <10°
Max. particle count rate: 10 MHz
Max. particle Identification rate: 100 kHz
Mass: 700 g
Power: 1.5 W
Size: 80x70x70 mm3
The multifunctional radiation monitor consists of a two-layer silicon pixel tracker and a scintillation crystal that is optically connected to a photodiode. The readout chain is based on an FPGA that performs digital filtering and can do the particle identification in real time at high count rates. The MPS utilizes the latest developments in scintillator and FPGA technology.
The performance of the MPS can be adapted to the client's requirements. It can be used as an advanced radiation monitor for space, including nano- and microsatellites, for security, material analysis, medical and scientific applications.

Current and Potential Domains of Application

  • Accelerator beam lines
  • Space and aerospace radiation monitoring
  • Radiation safety
  • Nuclear industry
  • Material analysis
  • Medical imaging