Year: 2025
Type: article
Abstract: This study presents a comprehensive investigation of pyroelectric detectors for high-energy synchrotron X-ray detection and addressing key limitations in existing technologies. We compare three high-performance pyroelectric materials (LiTaO3, LiNbO3, and triglycine sulfate) in both coupled and uncoupled thermal geometries using current amplification techniques, contrasting results with conventional voltage follower designs. Experiments conducted at the Angle-Dispersive X-ray Diffraction beamline of the Indus-2 synchrotron facility demonstrate that current amplification significantly outperforms voltage follower configurations, achieving responsivity values up to 105 V/W and substantially-improved signal-to-noise ratios. Among materials tested, when used in thicker formats, triglycine sulfate exhibits superior sensitivity (detectivity ~7.60×107 cm·Hz½·W⁻¹), though LiTaO3 offers better thermal stability for practical applications. Further optimization through thickness reduction of LiTaO3 crystals in the range of 500μm to 100μm yielded substantial improvements in key performance matrices, with the thinnest crystals achieving detectivity values of ~1.1×108 cm·Hz½·W⁻¹ in uncoupled geometry. This maximizes thermal isolation and temperature rise per unit-absorbed power. These results validate theoretical models, which predict performance enhancements through optimal thermal management and amplification strategies. This establishes new benchmarks for pyroelectric-based synchrotron X-ray detection.
Source: AIP Advances
DOI: 10.1063/5.0301701
Authors: S. R. Kane, R. W. Whatmore, P. K. Jha, P. K. Mehta
Language: English
Subfield: Radiation
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,350
OpenAlex ID: W4417045978