Cryogenic tunable microwave cavity at 13 GHz for hyperfine spectroscopy of antiprotonic helium

J. Sakaguchi; H. Gilg; R. S. Hayano; T. Ishikawa; K. Suzuki; E. Widmann; H. Yamaguchi; F. Caspers; J. Eades; M. Hori; D. Barna; D. Horváth; B. Juhász; H. A. Torii; T. Yamazaki

doi:10.1016/j.nima.2004.06.144

Cryogenic tunable microwave cavity at 13 GHz for hyperfine spectroscopy of antiprotonic helium

J. Sakaguchi, H. Gilg, R. S. Hayano, T. Ishikawa, K. Suzuki, E. Widmann, H. Yamaguchi, F. Caspers, J. Eades, M. Hori, D. Barna, D. Horváth, B. Juhász, H. A. Torii, T. Yamazaki

Magyar Tudományos Akadémia

Research output: Article

10 Citations (Scopus)

Abstract

For the precise measurement of the hyperfine structure of antiprotonic helium, microwave radiation of 12.9 GHz frequency is needed, tunable over ±100 MHz. A cylindrical microwave cavity is used whose front and rear faces are meshed to allow the antiprotons and laser beams to enter. The cavity is embedded in a cryogenic helium gas target. Frequency tuning of ∼300 MHz with Q values of 2700-3000 was achieved using over-coupling and an external triple stub tuner. We also present Monte-Carlo simulations of the stopping distribution of antiprotons in the low-density helium gas using the GEANT4 package with modified energy loss routines.

Original language	English
Pages (from-to)	598-611
Number of pages	14
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	533
Issue number	3
DOIs	https://doi.org/10.1016/j.nima.2004.06.144
Publication status	Published - nov. 11 2004

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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Sakaguchi, J., Gilg, H., Hayano, R. S., Ishikawa, T., Suzuki, K., Widmann, E., Yamaguchi, H., Caspers, F., Eades, J., Hori, M., Barna, D., Horváth, D., Juhász, B., Torii, H. A., & Yamazaki, T. (2004). Cryogenic tunable microwave cavity at 13 GHz for hyperfine spectroscopy of antiprotonic helium. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 533(3), 598-611. https://doi.org/10.1016/j.nima.2004.06.144

Cryogenic tunable microwave cavity at 13 GHz for hyperfine spectroscopy of antiprotonic helium. / Sakaguchi, J.; Gilg, H.; Hayano, R. S.; Ishikawa, T.; Suzuki, K.; Widmann, E.; Yamaguchi, H.; Caspers, F.; Eades, J.; Hori, M.; Barna, D.; Horváth, D.; Juhász, B.; Torii, H. A.; Yamazaki, T.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 533, No. 3, 11.11.2004, p. 598-611.

Research output: Article

Sakaguchi, J, Gilg, H, Hayano, RS, Ishikawa, T, Suzuki, K, Widmann, E, Yamaguchi, H, Caspers, F, Eades, J, Hori, M, Barna, D , Horváth, D, Juhász, B, Torii, HA & Yamazaki, T 2004, 'Cryogenic tunable microwave cavity at 13 GHz for hyperfine spectroscopy of antiprotonic helium', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 533, no. 3, pp. 598-611. https://doi.org/10.1016/j.nima.2004.06.144

Sakaguchi, J. ; Gilg, H. ; Hayano, R. S. ; Ishikawa, T. ; Suzuki, K. ; Widmann, E. ; Yamaguchi, H. ; Caspers, F. ; Eades, J. ; Hori, M. ; Barna, D. ; Horváth, D. ; Juhász, B. ; Torii, H. A. ; Yamazaki, T. / Cryogenic tunable microwave cavity at 13 GHz for hyperfine spectroscopy of antiprotonic helium. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2004 ; Vol. 533, No. 3. pp. 598-611.

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abstract = "For the precise measurement of the hyperfine structure of antiprotonic helium, microwave radiation of 12.9 GHz frequency is needed, tunable over ±100 MHz. A cylindrical microwave cavity is used whose front and rear faces are meshed to allow the antiprotons and laser beams to enter. The cavity is embedded in a cryogenic helium gas target. Frequency tuning of ∼300 MHz with Q values of 2700-3000 was achieved using over-coupling and an external triple stub tuner. We also present Monte-Carlo simulations of the stopping distribution of antiprotons in the low-density helium gas using the GEANT4 package with modified energy loss routines.",

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AU - Sakaguchi, J.

AU - Gilg, H.

AU - Hayano, R. S.

AU - Ishikawa, T.

AU - Suzuki, K.

AU - Widmann, E.

AU - Yamaguchi, H.

AU - Caspers, F.

AU - Eades, J.

AU - Hori, M.

AU - Barna, D.

AU - Horváth, D.

AU - Juhász, B.

AU - Torii, H. A.

AU - Yamazaki, T.

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AB - For the precise measurement of the hyperfine structure of antiprotonic helium, microwave radiation of 12.9 GHz frequency is needed, tunable over ±100 MHz. A cylindrical microwave cavity is used whose front and rear faces are meshed to allow the antiprotons and laser beams to enter. The cavity is embedded in a cryogenic helium gas target. Frequency tuning of ∼300 MHz with Q values of 2700-3000 was achieved using over-coupling and an external triple stub tuner. We also present Monte-Carlo simulations of the stopping distribution of antiprotons in the low-density helium gas using the GEANT4 package with modified energy loss routines.

KW - Antiprotonic helium

KW - Cryogenic tunable microwave cavity

KW - Hyperfine spectroscopy

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