• Title/Summary/Keyword: KRISS

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Proficiency Test for the Dosimetry Audit Service Provider

  • Chul-Young Yi;In Jung Kim;Jong In Park;Yun Ho Kim;Young Min Seong
    • Progress in Medical Physics
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    • v.33 no.4
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    • pp.72-79
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    • 2022

  • Purpose: The proficiency test was conducted to assess the performance of the dosimetry audit service provider in the readout practice of the dose delivered to patients in medical institutions. Methods: A certain amount of the absorbed dose to water for the high-energy X-ray from the medical linear accelerator (LINAC) installed in the Korea Research Institute of Standards and Science (KRISS) was delivered to the postal dose audit package given by the dosimetry audit service provider, in which the radio-photoluminescence (RPL) glass dosimeters were mounted. The dosimetry audit service provider read the RPL glass dosimeters and sent the readout dose value with its uncertainty to KRISS. The performance of the dosimetry audit service provider was evaluated based on the En number given in ISO/IEC 17043:2010. Results: The evaluated En number was -0.954. Based on the ISO/IEC 17043, the performance of the dosimetry service provider is "satisfactory." Conclusions: As part of the conformity assessment, the KRISS performed the proficiency test over the postal dose audit practice run by the dosimetry audit service provider. The proficiency test is in line with confirming the traceability of the medical institutions to the primary standard of absorbed dose to the water of the KRISS and ensuring the confidence of the dosimetry audit service provider.

  • https://doi.org/10.14316/pmp.2022.33.4.72 인용 PDF KSCI

100 kN Deadweight Force Standard Machine and Evaluation

  • Park Yon-Kyu;Kim Min-Seok;Kim Jong-Ho;Kang Dae-Im;Song Hou-Keun
    • Journal of Mechanical Science and Technology
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    • v.20 no.7
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    • pp.961-971
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    • 2006

  • A deadweight force standard machine is a mechanical structure that generates force by subjecting deadweights to the local gravitational field. The Korea Research Institute of Standards and Science (KRISS) developed and installed a 100 kN deadweight force standard machine for national force standards. It can generate forces from 2 kN to 110 kN in increments of 1 kN. The uncertainty of the force machine was estimated and declared as $2\times10^{-5}$. This 100 kN deadweight force machine was compared with the 500 kN deadweight force standard machine at KRISS and the 20 kN and 50 kN deadweight force standard machines at the National Metrology Institute of Japan (NMIJ). The measurement results showed good agreement between the deadweight force machines, and the accuracy level of the 100 kN deadweight force machine was verified.

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Quantification of $Cu(In_xGa_{1-x})Se_2$ Solar Cell by SIMS

  • Jang, Jong-Shik;Hwang, Hye-Hyen;Kang, Hee-Jae;Min, Hyung-Sik;Han, Myung-Sub;Suh, Jung-Ki;Cho, Kyung-Haeng;Chung, Yong-Duck;Kim, Je-Ha;Kim, Kyung-Joong
    • Proceedings of the Korean Vacuum Society Conference
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    • 2012.02a
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    • pp.275-275
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    • 2012

  • The relative composition of $Cu(InGa)Se_2$ solar cells is one of the most important measurement issues. However, quantitative analysis of multi-component alloy films is difficult by surface analysis methods due to severe matrix effect. In this study, quantitative depth profiling analysis of CIGS films was investigated by secondary ion mass spectrometry (SIMS). The compositions were measured by SIMS using the alloy reference relative sensitivity factors derived from the certified compositions and the total counting numbers of each element. The compositions measured by SIMS were linearly proportional to those by inductively coupled plasma-mass spectrometry (ICP-MS) using isotope dilution method. In this study, the quantification measured by ICP-MS method is compared with the composition calculated by SIMS depth profiles with AR-RSFs obtained from the reference. The SIMS depth profile of CIGS thin films according to the manufacturing condition was converted into compositional depth profile.

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