@article {79,
	title = {In-beam measurement of the hydrogen hyperfine splitting - towards antihydrogen spectroscopy},
	journal = {Nature Communications},
	volume = {8},
	year = {2017},
	month = {12/06/2017},
	pages = {1{\textendash}9},
	abstract = {<p>Antihydrogen, the lightest atom consisting purely of antimatter, is an ideal laboratory to study the CPT symmetry by comparison to hydrogen. With respect to absolute precision, transitions within the ground-state hyperfine structure (GS-HFS) are most appealing by virtue of their small energy separation. ASACUSA proposed employing a beam of cold antihydrogen atoms in a Rabi-type experiment to determine the GS-HFS in a field-free region. Here we present a measurement of the zero-field hydrogen GS-HFS using the spectroscopy apparatus of ASACUSA{\textquoteright}s antihydrogen experiment. The measured value of {\$}\backslashnu{\_}\backslashmathrm{\{}HF{\}}{\$}={\$}1{\~{}}420{\~{}}405{\~{}}748.4(3.4)(1.6){\~{}}\backslashtextrm{\{}Hz{\}}{\$} with a relative precision of {\$}\backslashDelta{\$}{\$}\backslashnu{\_}\backslashmathrm{\{}HF{\}}{\$}/{\$}\backslashnu{\_}\backslashmathrm{\{}HF{\}}{\$}={\$}2.7\backslashtimes10{\^{}}{\{}-9{\}}{\$} constitutes the most precise determination of this quantity in a beam and verifies the developed spectroscopy methods for the antihydrogen HFS experiment to the ppb level. Together with the recently presented observation of antihydrogen atoms {\$}2.7{\~{}}\backslashtextrm{\{}m{\}}{\$} downstream of the production region, the prerequisites for a measurement with antihydrogen are now available within the ASACUSA collaboration.</p>
},
	doi = {10.1038/ncomms15749},
	url = {https://doi.org/10.1038/ncomms15749},
	author = {Diermaier, M. and Jepsen, C. B. and Kolbinger, B. and Malbrunot, C. and Massiczek, O. and Sauerzopf, C. and Simon, M. C. and Zmeskal, J. and Widmann, E.}
}
@article {54,
	title = {Measurement of the hyperfine structure of antihydrogen in a beam},
	journal = {Hyperfine Interactions},
	volume = {215},
	year = {2013},
	pages = {1-8},
	keywords = {Antihydrogen, CPT, Precision spectroscopy},
	issn = {0304-3843},
	doi = {10.1007/s10751-013-0809-6},
	url = {http://dx.doi.org/10.1007/s10751-013-0809-6},
	author = {Widmann, E. and Diermaier, M. and Juhasz, B. and Malbrunot, C. and Massiczek, O. and Sauerzopf, C. and Suzuki, K. and W{\"u}nschek, B. and Zmeskal, J. and Federmann, S. and Kuroda, N. and Ulmer, S. and Yamazaki, Y.}
}
@article {35,
	title = {Towards the production of anti-hydrogen beams},
	journal = {AIP Conference Proceedings},
	volume = {1521},
	year = {2013},
	pages = {134-143},
	keywords = {antimatter, atomic beams, hydrogen neutral atoms, hyperfine structure, particle beam diagnostics},
	doi = {10.1063/1.4796069},
	url = {http://link.aip.org/link/?APC/1521/134/1},
	author = {H. Higaki and Y. Enomoto and N. Kuroda and K. Michishio and D. J. Murtagh and S. Ulmer and S. Van Gorp and C. H. Kim and Y. Nagata and Y. Kanai and Torii, H.A. and M. Corradini and M. Leali and E. Lodi-Rizzini and V. Mascagna and L. Venturelli and N. Zurlo and K. Fujii and M. Otsuka and K. Tanaka and H. Imao and Y. Nagashima and Y. Matsuda and B. Juh{\'a}sz and A. Mohri and Y. Yamazaki},
	editor = {Xabier Sarasola and Lutz Schweikhard and Thomas Sunn Pedersen}
}
@article {50,
	title = {Antihydrogen atom formation in a CUSP trap towards spin polarized beams},
	journal = {Hyperfine Interactions},
	volume = {212},
	year = {2012},
	pages = {31-40},
	keywords = {Antihydrogen, Atomic beam, CPT invariance, Rydberg atom},
	issn = {0304-3843},
	doi = {10.1007/s10751-012-0646-z},
	url = {http://dx.doi.org/10.1007/s10751-012-0646-z},
	author = {Kuroda, N. and Enomoto, Y. and Michishio, K. and Kim, C.H. and Higaki, H. and Nagata, Y. and Kanai, Y. and Torii, H.A. and Corradini, M. and Leali, M. and Lodi-Rizzini, E. and Venturelli, L. and Zurlo, N. and Fujii, K. and Ohtsuka, M. and Tanaka, K. and Imao, H. and Nagashima, Y. and Matsuda, Y. and Juhasz, B. and Widmann, E. and Mohri, A. and Yamazaki, Y.}
}
@article {49,
	title = {Synthesis of antihydrogen atoms in a CUSP trap},
	journal = {Hyperfine Interactions},
	volume = {209},
	year = {2012},
	pages = {35-41},
	abstract = {<p>ASACUSA collaboration has been making a path to realize high precision microwave spectroscopy of ground-state hyperfine transitions of antihydrogen atom in flight for stringent test of the CPT symmetry. Recently, we have succeeded in synthesizing our first cold antihydrogen atoms employing a CUSP trap. It is expected that synthesized antihydrogen atoms in the low-field-seeking states are preferentially focused along the cusp magnetic field axis whereas those in the high-field-seeking states are not focused, resulting in the formation of a spin-polarized antihydrogen beam. We report the recent results of antihydrogen atom synthesis and beam production developed with the CUSP trap.</p>
},
	issn = {0304-3843},
	url = {http://dx.doi.org/10.1007/s10751-012-0560-4},
	author = {Kuroda, Naofumi and Enomoto, Yoshinori and Michishio, Koji and Kim, Chanhyoun and Higaki, Hiroyuki and Nagata, Yugo and Kanai, Yasuyuki and Torii, Hiroyuki and Corradini, Maurizzio and Leali, Marco and Lodi-Rizzini, Evandro and Mascagna, Valerio and Venturelli, Luca and Zurlo, Nicola and Fujii, Koki and Ohtsuka, Miki and Tanaka, Kazuo and Imao, Hiroshi and Nagashima, Yasuyuki and Matsuda, Yasuyuki and Juh{\'a}sz, Bertalan and Widmann, Eberhard and Mohri, Akihiro and Yamazaki, Yasunori}
}
@article {22,
	title = {Synthesis of Cold Antihydrogen in a Cusp Trap},
	journal = {Physical Review LettersPhys. Rev. Lett.},
	volume = {105},
	year = {2010},
	month = {2010/12/07/},
	pages = {243401 -},
	url = {http://link.aps.org/doi/10.1103/PhysRevLett.105.243401},
	author = {Enomoto, Y. and Kuroda, N. and Michishio, K. and Kim, C. H. and Higaki, H. and Nagata, Y. and Kanai, Y. and Torii, H. A. and Corradini, M. and Leali, M. and Lodi-Rizzini, E. and Mascagna, V. and Venturelli, L. and Zurlo, N. and Fujii, K. and Ohtsuka, M. and Tanaka, K. and Imao, H. and Nagashima, Y. and Matsuda, Y. and Juhasz, B. and Mohri, A. and Yamazaki, Y.}
}
@article {14,
	title = {Confinement of a Large Number of Antiprotons and Production of an Ultraslow Antiproton Beam},
	journal = {Physical Review Letters},
	volume = {94},
	year = {2005},
	month = {2005/01/18/},
	pages = {023401 -},
	url = {http://link.aps.org/doi/10.1103/PhysRevLett.94.023401},
	author = {Kuroda, N. and Torii, H. A. and Franzen, K. Yoshiki and Wang, Z. and Yoneda, S. and Inoue, M. and Hori, M. and Juhasz, B. and Horvath, D. and Higaki, H. and Mohri, A. and Eades, J. and Komaki, K. and Yamazaki, Y.}
}
@article {12,
	title = {Transport beam line for ultraslow monoenergetic antiprotons},
	journal = {Review of Scientific InstrumentsRev. Sci. Instrum.},
	volume = {74},
	year = {2003},
	month = {2003/07/00/},
	pages = {3305 - 3311},
	keywords = {beam handling equipment, proton beams},
	url = {http://dx.doi.org/10.1063/1.1578160},
	author = {Yoshiki-Franzen, K. and Kuroda, N. and Torii, H. A. and Hori, M. and Wang, Z. and Higaki, H. and Yoneda, S. and Juhasz, B. and Horvath, D. and Mohri, A. and Komaki, K. and Yamazaki, Y.}
}
