Speaker
Description
Pulsed radiation fields are becoming increasingly prevalent in medical applications, industrial imaging, and at high-power laser facilities. Their fast time structure and extreme instantaneous dose rates pose challenges for accurate dosimetry, often causing pile-up effects and detector saturation in conventional monitoring systems. Even instruments specifically designed for pulsed fields typically provide only time-averaged operational quantities, offering limited or no spectrometric information.
However, spectral information is crucial for reliably assessing shielding performance and adapting RP measures to evolving radiation source characteristics. This need is particularly relevant at the ELI Beamlines Facility of the Extreme Light Infrastructure ERIC (Prague, Czech Republic), where experimental configurations and source characteristics may change frequently.
To address these challenges, we have developed a filter-stack spectrometer that combines active dose-sensitive layers interleaved with filters. The system incorporates a high-rate data acquisition system and employs a simulation-driven unfolding algorithm to provide real-time information on radiological conditions. The device is nominally designed for mixed γ/e radiation fields in a wide energy range; its modular architecture enables flexible deployment in diverse environments.
We will present the instrument’s implementation, calibration methodology, deployment strategy, and high-rate data processing framework, along with operational experience gained during its deployment at ELI Beamlines.