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 | |
| Publication status | Published - nov. 11 2004 |
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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
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TY - JOUR
T1 - Cryogenic tunable microwave cavity at 13 GHz for hyperfine spectroscopy of antiprotonic helium
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.
PY - 2004/11/11
Y1 - 2004/11/11
N2 - 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.
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
UR - http://www.scopus.com/inward/record.url?scp=7444242040&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=7444242040&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2004.06.144
DO - 10.1016/j.nima.2004.06.144
M3 - Article
AN - SCOPUS:7444242040
VL - 533
SP - 598
EP - 611
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
IS - 3
ER -