Direct measurement of the hyperfine structure of the ground state positronium using high power sub-THz radiation

T. Yamazaki, A. Miyazaki, Taikan Suehara, T. Namba, S. Asai, T. Kobayashi, H. Saito, Y. Tatematsu, I. Ogawa, T. Idehara

研究成果: 著書/レポートタイプへの貢献会議での発言

抄録

We plan to directly measure the hyperfine structure of the ground-state positronium. The hyperfine structure between ortho-positronium and para-positronium is about 203 GHz. We develop a new optical system to accumulate about 10 kW power using a gyrotron and a Fabry-Pérot cavity, and have already observed the hyperfine transition at a frequency point of 202.9 GHz. The transition probability is measured to be A = 3.1-1.2 +1.6×10-8 s-1, which is in good agreement with the theoretical value of 3.37×10-8 s-1. In order to measure the hyperfine structure, we have to repeat transition measurements at different frequencies around 203 GHz. We are now refining the optical system to quickly change output frequency and obtain more power.

元の言語英語
ホスト出版物のタイトルIRMMW-THz 2012 - 37th International Conference on Infrared, Millimeter, and Terahertz Waves
DOI
出版物ステータス出版済み - 12 1 2012
外部発表Yes
イベント37th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2012 - Wollongong, NSW, オーストラリア
継続期間: 9 23 20129 28 2012

出版物シリーズ

名前International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
ISSN(印刷物)2162-2027
ISSN(電子版)2162-2035

その他

その他37th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2012
オーストラリア
Wollongong, NSW
期間9/23/129/28/12

Fingerprint

Optical systems
Ground state
Radiation
Refining

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

これを引用

Yamazaki, T., Miyazaki, A., Suehara, T., Namba, T., Asai, S., Kobayashi, T., ... Idehara, T. (2012). Direct measurement of the hyperfine structure of the ground state positronium using high power sub-THz radiation. : IRMMW-THz 2012 - 37th International Conference on Infrared, Millimeter, and Terahertz Waves [6380416] (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz). https://doi.org/10.1109/IRMMW-THz.2012.6380416

Direct measurement of the hyperfine structure of the ground state positronium using high power sub-THz radiation. / Yamazaki, T.; Miyazaki, A.; Suehara, Taikan; Namba, T.; Asai, S.; Kobayashi, T.; Saito, H.; Tatematsu, Y.; Ogawa, I.; Idehara, T.

IRMMW-THz 2012 - 37th International Conference on Infrared, Millimeter, and Terahertz Waves. 2012. 6380416 (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz).

研究成果: 著書/レポートタイプへの貢献会議での発言

Yamazaki, T, Miyazaki, A, Suehara, T, Namba, T, Asai, S, Kobayashi, T, Saito, H, Tatematsu, Y, Ogawa, I & Idehara, T 2012, Direct measurement of the hyperfine structure of the ground state positronium using high power sub-THz radiation. : IRMMW-THz 2012 - 37th International Conference on Infrared, Millimeter, and Terahertz Waves., 6380416, International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, 37th International Conference on Infrared, Millimeter and Terahertz Waves, IRMMW-THz 2012, Wollongong, NSW, オーストラリア, 9/23/12. https://doi.org/10.1109/IRMMW-THz.2012.6380416
Yamazaki T, Miyazaki A, Suehara T, Namba T, Asai S, Kobayashi T その他. Direct measurement of the hyperfine structure of the ground state positronium using high power sub-THz radiation. : IRMMW-THz 2012 - 37th International Conference on Infrared, Millimeter, and Terahertz Waves. 2012. 6380416. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz). https://doi.org/10.1109/IRMMW-THz.2012.6380416
Yamazaki, T. ; Miyazaki, A. ; Suehara, Taikan ; Namba, T. ; Asai, S. ; Kobayashi, T. ; Saito, H. ; Tatematsu, Y. ; Ogawa, I. ; Idehara, T. / Direct measurement of the hyperfine structure of the ground state positronium using high power sub-THz radiation. IRMMW-THz 2012 - 37th International Conference on Infrared, Millimeter, and Terahertz Waves. 2012. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz).
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AU - Yamazaki, T.

AU - Miyazaki, A.

AU - Suehara, Taikan

AU - Namba, T.

AU - Asai, S.

AU - Kobayashi, T.

AU - Saito, H.

AU - Tatematsu, Y.

AU - Ogawa, I.

AU - Idehara, T.

PY - 2012/12/1

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N2 - We plan to directly measure the hyperfine structure of the ground-state positronium. The hyperfine structure between ortho-positronium and para-positronium is about 203 GHz. We develop a new optical system to accumulate about 10 kW power using a gyrotron and a Fabry-Pérot cavity, and have already observed the hyperfine transition at a frequency point of 202.9 GHz. The transition probability is measured to be A = 3.1-1.2 +1.6×10-8 s-1, which is in good agreement with the theoretical value of 3.37×10-8 s-1. In order to measure the hyperfine structure, we have to repeat transition measurements at different frequencies around 203 GHz. We are now refining the optical system to quickly change output frequency and obtain more power.

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