@article {94,
	title = {Measurement of the principal quantum number distribution in a beam of antihydrogen atoms},
	volume = {75},
	year = {2021},
	month = {2021/03/08},
	pages = {91},
	abstract = {The ASACUSA (Atomic Spectroscopy And Collisions Using Slow Antiprotons) collaboration plans to measure the ground-state hyperfine splitting of antihydrogen in a beam at the CERN Antiproton Decelerator with initial relative precision of $$10^{-6}$$or better, to test the fundamental CPT (combination of charge conjugation, parity transformation and time reversal) symmetry between matter and antimatter. This challenging goal requires a polarised antihydrogen beam with a sufficient number of antihydrogen atoms in the ground state. The first measurement of the quantum state distribution of antihydrogen atoms in a low magnetic field environment of a few mT is described. Furthermore, the data-driven machine learning analysis to identify antihydrogen events is discussed.},
	isbn = {1434-6079},
	url = {https://doi.org/10.1140/epjd/s10053-021-00101-y},
	author = {Kolbinger, B. and Amsler, C. and Cuendis, S. Arguedas and Breuker, H. and Capon, A. and Costantini, G. and Dupre, P. and Fleck, M. and Gligorova, A. and Higaki, H. and Kanai, Y. and Kletzl, V. and Kuroda, N. and Lanz, A. and Leali, M. and M{\"a}ckel, V. and Malbrunot, C. and Mascagna, V. and Massiczek, O. and Matsuda, Y. and Murtagh, D. J. and Nagata, Y. and Nanda, A. and Nowak, L. and Radics, B. and Sauerzopf, C. and Simon, M. C. and Tajima, M. and Torii, H. A. and Uggerh{\o}j, U. and Ulmer, S. and Venturelli, L. and Weiser, A. and Wiesinger, M. and Widmann, E. and Wolz, T. and Yamazaki, Y. and Zmeskal, J.}
}
@article {75,
	title = {The ASACUSA CUSP: an antihydrogen experiment},
	journal = {Hyperfine Interactions},
	volume = {235},
	year = {2015},
	pages = {13{\textendash}20},
	abstract = {In order to test CPT symmetry between antihydrogen and its counterpart hydrogen, the ASACUSA collaboration plans to perform high precision microwave spectroscopy of ground-state hyperfine splitting of antihydrogen atom in-flight. We have developed an apparatus ({\textquoteleft}{\textquoteleft}cusp trap{\textquoteright}{\textquoteright}) which consists of a superconducting anti-Helmholtz coil and multiple ring electrodes. For the preparation of slow antiprotons and positrons, Penning-Malmberg type traps were utilized. The spectrometer line was positioned downstream of the cusp trap. At the end of the beamline, an antihydrogen beam detector was located, which comprises an inorganic Bismuth Germanium Oxide (BGO) single-crystal scintillator housed in a vacuum duct and surrounding plastic scintillators. A significant fraction of antihydrogen atoms flowing out the cusp trap were detected.},
	issn = {1572-9540},
	doi = {10.1007/s10751-015-1205-1},
	url = {http://dx.doi.org/10.1007/s10751-015-1205-1},
	author = {Kuroda, N. and Ulmer, S. and Murtagh, D. J. and Gorp, S. and Nagata, Y. and Diermaier, M. and Federmann, S. and Leali, M. and Malbrunot, C. and Mascagna, V. and Massiczek, O. and Michishio, K. and Mizutani, T. and Mohri, A. and Nagahama, H. and Ohtsuka, M. and Radics, B. and Sakurai, S. and Sauerzopf, C. and Suzuki, K. and Tajima, M. and Torii, H. A. and Venturelli, L. and W{\"u}nschek, B. and Zmeskal, J. and Zurlo, N. and Higaki, H. and Kanai, Y. and Rizzini, E. Lodi and Nagashima, Y. and Matsuda, Y. and Widmann, E. and Yamazaki, Y.}
}
@article {56,
	title = {A source of antihydrogen for in-flight hyperfine spectroscopy},
	journal = {Nat Commun},
	volume = {5},
	year = {2014},
	month = {21/01/2014},
	abstract = {<p>Antihydrogen, a positron bound to an antiproton, is the simplest antiatom. Its counterpart{\textemdash}hydrogen{\textemdash}is one of the most precisely investigated and best understood systems in physics research. High-resolution comparisons of both systems provide sensitive tests of CPT symmetry, which is the most fundamental symmetry in the Standard Model of elementary particle physics. Any measured difference would point to CPT violation and thus to new physics. Here we report the development of an antihydrogen source using a cusp trap for in-flight spectroscopy. A total of 80 antihydrogen atoms are unambiguously detected 2.7 m downstream of the production region, where perturbing residual magnetic fields are small. This is a major step towards precision spectroscopy of the ground-state hyperfine splitting of antihydrogen using Rabi-like beam spectroscopy.</p>
},
	url = {http://dx.doi.org/10.1038/ncomms4089},
	author = {Kuroda, N. and Ulmer, S. and Murtagh, D. J. and Van Gorp, S. and Nagata, Y. and Diermaier, M. and Federmann, S. and Leali, M. and Malbrunot, C. and Mascagna, V. and Massiczek, O. and Michishio, K. and Mizutani, T. and Mohri, A. and Nagahama, H. and Ohtsuka, M. and Radics, B. and Sakurai, S. and Sauerzopf, C. and Suzuki, K. and Tajima, M. and Torii, H. A. and Venturelli, L. and Wu{\textasciidieresis}nschek, B. and Zmeskal, J. and Zurlo, N. and Higaki, H. and Kanai, Y. and Lodi Rizzini, E. and Nagashima, Y. and Matsuda, Y. and Widmann, E. and Yamazaki, Y.}
}
@article {23,
	title = {Development of a monoenergetic ultraslow antiproton beam source for high-precision investigation},
	journal = {Physical Review Special Topics - Accelerators and BeamsPhys. Rev. ST Accel. Beams},
	volume = {15},
	year = {2012},
	month = {2012/02/17/},
	pages = {024702 -},
	url = {http://link.aps.org/doi/10.1103/PhysRevSTAB.15.024702},
	author = {Kuroda, N. and Torii, H. A. and Nagata, Y. and Shibata, M. and Enomoto, Y. and Imao, H. and Kanai, Y. and Hori, M. and Saitoh, H. and Higaki, H. and Mohri, A. and Fujii, K. and Kim, C. H. and Matsuda, Y. and Michishio, K. and Nagashima, Y. and Ohtsuka, M. and Tanaka, K. and Yamazaki, Y.}
}
@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 {21,
	title = {Target Structure Induced Suppression of the Ionization Cross Section for Very Low Energy Antiproton-Hydrogen Collisions},
	journal = {Physical Review LettersPhys. Rev. Lett.},
	volume = {105},
	year = {2010},
	month = {2010/11/17/},
	pages = {213201 -},
	url = {http://link.aps.org/doi/10.1103/PhysRevLett.105.213201},
	author = {Knudsen, H. and Torii, H. A. and Charlton, M. and Enomoto, Y. and Georgescu, I. and Hunniford, C. A. and Kim, C. H. and Kanai, Y. and Kristiansen, H.-P. E. and Kuroda, N. and Lund, M. D. and McCullough, R. W. and T{\"o}kesi, K. and Uggerh{\o}j, U. I. and Yamazaki, Y.}
}
@article {20,
	title = {On the double ionization of helium by very slow antiproton impact},
	journal = {Proceedings of the Fourth International Conference on Elementary Processes in Atomic Systems},
	volume = {267},
	year = {2009},
	month = {2009/1//},
	pages = {244 - 247},
	keywords = {Antiproton, CERN AD, Electron correlation, Ionization},
	isbn = {0168-583X},
	url = {http://www.sciencedirect.com/science/article/pii/S0168583X08011373},
	author = {Knudsen, H. and Kristiansen, H.-P. E. and Thomsen, H. D. and Uggerh{\o}j, U. I. and Ichioka, T. and M{\o}ller, S. P. and Hunniford, C. A. and McCullough, R. W. and Charlton, M. and Kuroda, N. and Nagata, Y. and Torii, H. A. and Yamazaki, Y. and Imao, H. and Andersen, H. H. and T{\"o}kesi, K.}
}
@article {19,
	title = {Ionization of Helium and Argon by Very Slow Antiproton Impact},
	journal = {Physical Review LettersPhys. Rev. Lett.},
	volume = {101},
	year = {2008},
	month = {2008/07/25/},
	pages = {043201 -},
	url = {http://link.aps.org/doi/10.1103/PhysRevLett.101.043201},
	author = {Knudsen, H. and Kristiansen, H.-P. E. and Thomsen, H. D. and Uggerh{\o}j, U. I. and Ichioka, T. and M{\o}ller, S. P. and Hunniford, C. A. and McCullough, R. W. and Charlton, M. and Kuroda, N. and Nagata, Y. and Torii, H. A. and Yamazaki, Y. and Imao, H. and Andersen, H. H. and T{\"o}kesi, K.}
}
@article {17,
	title = {Radial Compression of an Antiproton Cloud for Production of Intense Antiproton Beams},
	journal = {Physical Review LettersPhys. Rev. Lett.},
	volume = {100},
	year = {2008},
	month = {2008/05/19/},
	pages = {203402 -},
	url = {http://link.aps.org/doi/10.1103/PhysRevLett.100.203402},
	author = {Kuroda, N. and Torii, H. A. and Shibata, M. and Nagata, Y. and Barna, D. and Hori, M. and Horvath, D. and Mohri, A. and Eades, J. and Komaki, K. 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.}
}
