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

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 languageEnglish
Pages (from-to)598-611
Number of pages14
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume533
Issue number3
DOIs
Publication statusPublished - nov. 11 2004

Fingerprint

Cryogenics
cryogenics
Helium
helium
Microwaves
Spectroscopy
antiprotons
microwaves
cavities
spectroscopy
hyperfine structure
Gases
gases
stopping
Laser beams
Energy dissipation
Tuning
energy dissipation
tuning
laser beams

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

Cite this

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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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.

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KW - Cryogenic tunable microwave cavity

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