• Title/Summary/Keyword: 루비듐

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A Study of the Microwave Frequency Standard with Rubidium Cell (루비듐 셀을 이용한 마이크로파 주파수 표준기 연구)

  • Park, Sung-Jong;Cho, Hyuk;Park, Jongdae;Kwon, Taek-Yong;Lee, Ho-Sung
    • Proceedings of the Optical Society of Korea Conference
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    • 2000.08a
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    • pp.78-79
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    • 2000

  • 소형 루비듐 원자시계를 만들기 위해 원자에서의 CPT(coherent population trapping) 현상, 유도 라만 산란(SRS: Stimulated Raman Scattering), 루비듐 메이저 등 다양한 방법들이 소개되고 있다$^{(1, 3)}$ . 본 연구에서는 루비듐 원자 주파수 표준기를 위해 루비듐 셀을 이용한 마이크로파 주파수 표준기(즉, 원자시계)에 관한 연구를 수행하였다. 루비듐 셀을 이용한 원자시계는 가격이 저렴하고 부피가 작아 휴대용으로 적합하다. 따라서 정보통신 분야에서 동기 신호 발생기에 사용되는 등 다양한 응용분야를 갖고 있다. (중략)

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Rubidium Market Trends, Recovery Technologies, and the Relevant Future Countermeasures (루비듐 시장 및 회수 동향에 따른 향후 관련 대응방안)

  • Sang-hun Lee
    • Resources Recycling
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    • v.32 no.3
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    • pp.3-8
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    • 2023

  • This study discussed production, demand, and future prospects of rubidium, which is an alkali group metal that is highly reactive to various media and requires carefulness in handling, but no significant environmental hazard of rubidium has been reported yet. Rubidium is used in various fields such as optoelectronic equipment, biomedical, and chemical industries. Because of difficulty in production as well as limited demand, the transaction price of rubidium is relatively high, but its detail information such as market status and potential growth is uncertain. However, if the mass production of versatile ultra-high-performance equipment such as quantum computers and the necessity of rubidium use in the equipment are confirmed, there is a possibility that the rubidium market will expand in the future. Rubidium is often found together with lithium, beryllium, and cesium, and may be present in granite containing minerals such as lepidolite and pollucite, as well as in seawater and industrial waste. Several technologies such as acid leaching, roasting, solvent extraction, and adsorption are used to recover rubidium. The maximum recovery efficiency of the rubidium from the sources and the processing above is generally high, but, in many practices, rubidium is not the main recovery target, and therefore the actual recovery effects should depend on presence of other valuable components or impurities, together with recovery costs, energy consumption, environmental issues, etc. In conclusion, although the current production and consumption of rubidium are limited, with consideration of the possible market fluctuations according to the emergence of large-scale demand sources, etc., further investigations by related institutions should be necessary.

  • https://doi.org/10.7844/kirr.2023.32.3.3 인용 PDF

Time-Error Prediction of Rubidium Atomic Clock according to the Elapsed Time (루비듐 원자시계의 경과시간에 따른 시간오차 예측)

  • 김영범;정낙삼;박동철
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.12 no.3
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    • pp.439-445
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    • 2001

  • In this paper, we propose a method that can minimize time-error when a commercial rubidium atomic clock is used as a portable reference clock. A linear interpolation method which was widely used is not based upon long-term stability, but our new method is considered to reduce time error. The comparison results between two method have shown that time error of our new approach considering with long-term stability is better than that of linear interpolation method within observation duration about one and half days. In addition, when the role of a rubidium atomic clock as a portable reference clock is completed within 12 hours, our new method can provide at most maximum time-error of 10 ns which is shorter than 15 ns in conventional method.

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Saturation Spectroscopy with Optical Pumping in $^{87}RD D_2$ Lines (루비듐-87 원자 $D_2$ 전이선에 대한 광펌핑 포화분광)

  • 이호성
    • Korean Journal of Optics and Photonics
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    • v.4 no.2
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    • pp.188-194
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    • 1993

  • By applying the Nakayama's theory of saturation spectroscopy to 87Rb $D_2$ lines, taking into account the optical pumping process, the relative intensities of the resonance signals were calculated for various polarization combinations of pump and probe beams. The saturated absorption spectra were observed with a linewidth-narrowed semiconductor laser. As the result, it was found that the theoretical calculations were in good agreement with the experimental observations in the case where the geomagnetic field was- shielded.

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