Development of a portable TDCR system at NIM, China

Zhou, Qianqian; Liu, Haoran; Yang, Zhousheng; Zhang, Weihua; Liang, Juncheng

doi:10.1016/j.apradiso.2022.110315

Cited by 4 publications

(1 citation statement)

References 11 publications

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“…In addition, with the advancement in photonics, compact PMTs are now commercially available [9]. Consequently, different international metrological laboratories have developed miniaturized TDCR systems [10]- [17]. However, these systems typically require a personal computer (PC) for efficiency computation.…”

Section: Introductionmentioning

confidence: 99%

Development of FPGA-based standalone, portable TDCR system

Sharma,

Agarwal,

Kulkarni

et al. 2023

J. Inst.

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A standalone, lightweight, portable, FPGA-based triple to double coincidence ratio (TDCR) system is developed. The optical chamber of the system is fabricated in a dual, coaxial cylindrical geometry, with the inner cylinder made up of Teflon and the outer one of aluminium. Three square PMTs, each having an active cathode area of 2.3 cm × 2.3 cm, are housed in the optical chamber. The variation in detection efficiency to identify the optimum kB (ionization quenching parameter) value is achieved by changing the vial position vertically with respect to the centre line of the PMTs. The coincidence analyzer implemented in a field programmable gate array (FPGA) transfers the pulse counts and associated parameters in real time to a Raspberry Pi single board computer (SBC). The TDCR algorithm to compute the efficiency is implemented in the SBC. In addition, the SBC is interfaced with a local 7” touchscreen to provide an intuitive graphical user interface (GUI) for operating the standalone instrument. The system performance is validated with 3H and 14C radionuclide standards.

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Section: Introductionmentioning

confidence: 99%