Status of the detector setup for the FAMU experiment at RIKEN-RAL for a precision measurement of the Zemach radius of the proton in muonic hydrogen

R. Rossini; A. Adamczak; D. Bakalov; G. Baldazzi; S. Banfi; M. Baruzzo; R. Benocci; R. Bertoni; M. Bonesini; V. Bonvicini; H. Cabrera; S. Carsi; D. Cirrincione; M. Clemenza; L. Colace; M.B. Danailov; P. Danev; A. de Bari; C. de Vecchi; E. Fasci; K.S. Gadedjisso-Tossou; R. Gaigher; L. Gianfrani; A.D. Hillier; K. Ishida; P.J.C. King; V. Maggi; A. Menegolli; E. Mocchiutti; L. Moretti; G. Morgante; J. Niemela; C. Petroselli; A. Pirri; C. Pizzolotto; M.C. Prata; A. Pullia; M. Pullia; R. Ramponi; M. Rossella; R. Sarkar; A. Sbrizzi; M. Stoilov; J.J. Suarez-Vargas; G. Toci; L. Tortora; E.S. Vallazza; K. Yokoyama; A. Vacchi

doi:10.1088/1748-0221/19/02/C02034

Journal of Instrumentation

paper • The following article is Open access

Status of the detector setup for the FAMU experiment at RIKEN-RAL for a precision measurement of the Zemach radius of the proton in muonic hydrogen

R. Rossini^1,2,3, A. Adamczak⁵, D. Bakalov⁶, G. Baldazzi^7,8, S. Banfi⁹, M. Baruzzo⁴, R. Benocci⁹, R. Bertoni⁹, M. Bonesini^9,10, V. Bonvicini⁴, H. Cabrera⁴, S. Carsi^9,11, D. Cirrincione^4,12, M. Clemenza^9,10, L. Colace^13,14, M.B. Danailov¹⁵, P. Danev⁶, A. de Bari^1,2, C. de Vecchi², E. Fasci^16,17, K.S. Gadedjisso-Tossou^4,18,19, R. Gaigher⁹, L. Gianfrani^16,17, A.D. Hillier³, K. Ishida^3,20, P.J.C. King³, V. Maggi⁹, A. Menegolli^1,2, E. Mocchiutti⁴, L. Moretti^16,17, G. Morgante^7,8,21, J. Niemela¹⁸, C. Petroselli^9,11, A. Pirri²², C. Pizzolotto⁴, M.C. Prata², A. Pullia^22,23,24, M. Pullia^2,29, R. Ramponi^24,25, M. Rossella², R. Sarkar²⁷, A. Sbrizzi⁸, M. Stoilov⁶, J.J. Suarez-Vargas⁴, G. Toci²⁸, L. Tortora¹³, E.S. Vallazza^9,11, K. Yokoyama³ and A. Vacchi^4,12,20

Published 23 February 2024 • © 2024 The Author(s)
Journal of Instrumentation, Volume 19, February 2024 Citation R. Rossini et al 2024 JINST 19 C02034 DOI 10.1088/1748-0221/19/02/C02034

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riccardo.rossini@infn.it

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¹ Department of Physics, University of Pavia, Pavia, Italy

² Sezione di Pavia, Istituto Nazionale di Fisica Nucleare (INFN), Pavia, Italy

³ ISIS Neutron and Muon Source, Science and Technology Facilities Council (STFC), Didcot, U.K.

⁴ Sezione di Trieste, Istituto Nazionale di Fisica Nucleare (INFN), Trieste, Italy

⁵ Institute of Nuclear Physics, Polish Academy of Sciences, Kraków, Poland

⁶ Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria

⁷ Department of Physics "A. Righi", University of Bologna, Bologna, Italy

⁸ Sezione di Bologna, Istituto Nazionale di Fisica Nucleare (INFN), Bologna, Italy

⁹ Sezione di Milano-Bicocca, Istituto Nazionale di Fisica Nucleare (INFN), Milan, Italy

¹⁰ Department of Physics "G. Occhialini", University of Milano-Bicocca, Milan, Italy

¹¹ Department of Science and High Technology, University of Insubria, Como, Italy

¹² Department of Mathematics, Computer Science and Physics, University of Udine, Udine, Italy

¹³ Sezione di Roma Tre, Istituto Nazionale di Fisica Nucleare (INFN), Rome, Italy

¹⁴ Department of Engineering, University of Roma Tre, Rome, Italy

¹⁵ Elettra Sincrotrone Trieste, Basovizza (Trieste), Italy

¹⁶ Department of Mathematics and Physics, University of Campania Luigi Vanvitelli, Caserta, Italy

¹⁷ Sezione di Napoli, Istituto Nazionale di Fisica Nucleare (INFN), Naples, Italy

¹⁸ The "Abdus Salam" International Centre for Theoretical Physics (ICTP), Trieste, Italy

¹⁹ Department of Physics, University of Lomè, Lomè, Togo

²⁰ RIKEN Nishina Center, Saitama, Japan

²¹ Osservatorio di Astrofisica e Scienza dello Spazio (OAF), Istituto Nazionale di Astrofisica (INAF), Bologna, Italy

²² Istituto di Fisica Applicata "N. Carrara" (IFAC), Consiglio Nazionale delle Ricerche (CNR), Sesto Fiorentino, Italy

²³ Department of Pysics "A. Pontremoli", University of Milan, Milan, Italy

²⁴ Sezione di Milano, Istituto Nazionale di Fisica Nucleare (INFN), Milan, Italy

²⁵ Istituto di Fotonica e Nanotecnologie (IFN), Consiglio Nazionale delle Ricerche (CNR), Milano, Italy

²⁶ Institute of Solid Physics, Bulgarian Academy of Sciences, Sofia, Bulgaria

²⁷ Indian Centre for Space Physics, Kolkata, India

²⁸ Istituto Nazionale di Ottica (INO), Consiglio Nazionale delle Ricerche (CNR), Sesto Fiorentino, Italy

²⁹ Centro Nazionale di Adroterapia Oncologica (CNAO), Pavia, Italy

ORCID iDs

R. Rossini https://orcid.org/0000-0001-5273-344X

Dates

Received 11 December 2023
Accepted 10 January 2024
Published 23 February 2024

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Abstract

The FAMU experiment at RIKEN-RAL is a muonic atom experiment with the aim to determine the Zemach radius of the proton by measuring the 1s hyperfine splitting in muonic hydrogen. The activity of the FAMU Collaboration in the years 2015–2023 enabled the final optimisation of the detector-target setup as well as the gas working condition in terms of temperature, pressure and gas mixture composition. The experiment has started its data taking in July 2023. The status of the detector setup for the 2023 experimental runs, for the beam characterisation and muonic X-ray detection in the 100–200 keV energy range, is presented and discussed.

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Status of the detector setup for the FAMU experiment at RIKEN-RAL for a precision measurement of the Zemach radius of the proton in muonic hydrogen

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