• Title/Summary/Keyword: dosimeter

Search Result 507, Processing Time 0.025 seconds

Experimental Study with Respect to Dose Characteristic of Glass Dosimeter for Low-Energy by Using Internal Detector of Piranha 657 (Piranha 657의 Internal Detector를 이용한 저에너지에서 유리선량계의 선량 특성에 관한 연구)

  • Son, Jin-Hyun;Min, Jung-Whan;Kim, Hyun-Soo;Lyu, Kwang-Yeul;Lim, Hyun-Soo;Kim, Jung-Min;Jeong, Hoi-Woun
    • Journal of radiological science and technology
    • /
    • v.35 no.2
    • /
    • pp.119-124
    • /
    • 2012

  • Recently, Glass Dosimeter (GD) with thermoluminescent Dosimeter (TLD) are comprehensively used to measure absorbed dose from diagnostic field to therapy field that means from low energy field to high energy field. However, such studies about dose characteristics of GD, such as reproducibility and energy dependency, are mostly results in high energy field. Because characteristic study for measurement devices of radiation dose and radiation detector is performed using 137Cs and 60Co which emit high energy radiations. Thus, this study was evaluated the linearity according to Piranha dose which measured by changing tube voltage (50kV, 80kV and 100kV which are low energy radiations), reproducibility and reproducibility according to delay time using GD. Measurement of radiation dose is performed using internal detector of Piranha 657 which is multi-function QA device (RTI Electronic, Sweden). Condition of measurement was 25mA, 0.02sec, 2.5mAs, SSD of 100 cm and exposure area with $10{\times}10cm^2$. As above method, GD was exposed to radiation. Sixty GDs were divided into three groups (50kV, 80kV, 100kV), then measured. In this study, GD was indicated the linearity in low energy field as high energy existing reported results. The reproducibility and reproducibility according to delay time were acceptable. In this study, we could know that GD can be used to not only measure the high energy field but also low energy field.

  • PDF KSCI

Development of an Improved RF Dosimeter (개량된 비접촉형 RF 선량계 구현)

  • Son, Jong-Dea;Lee, Seung-Min;Lee, Heung-Ho;Lee, Nam-Ho;Lee, Seung-Ho
    • Proceedings of the KIEE Conference
    • /
    • 2003.11c
    • /
    • pp.540-543
    • /
    • 2003

  • This paper presents design and manufacture of RF type non-contact radiological dosage measuring device. It also concerns on the broad out-line and the ways of improvement about RF type non-contact radiation measuring device. Measuring radiological dosage with non-contact RF, the stability and efficiency of the measure have been improved by reforming constant current circuit. Furthermore, applying communication protocol in process makes it possible to achieve faster and more accurate communication than old circuit. On the base of those, RF type non-contact radiological dosage measuring device which consists of radiological dosage measuring module and Reader module has been designed and manufactured. While testing communication against embodied device, the possibility of the field application could be confirmed.

  • PDF

A Study on the Neutron Dosimetry with LiF Thermoluminescent Dosimeters

  • Yoo, Y.S.;Kim, P.S.;Moon, P.S.
    • Nuclear Engineering and Technology
    • /
    • v.7 no.3
    • /
    • pp.191-198
    • /
    • 1975

  • A study was made on the neutron dosimetry in a mixed gamma-neutron field with LiF thermoluminescent dosimeter. In order to estimate the neutron dose in a mixed field, $^{6}$ LiF and $^{7}$ LiF dosimeters were used for fast and thermal neutron doses. The over-all conversion factors for the effects of dosimeter positions were derived for personnel monitoring and the glow curves of the LiF dosimeters for neutron and gamma-ray doses were also analyzed.

  • PDF