FAMU - Fisica degli Atomi MUonici - Muonic Atom Physics
FAMU is an international collaboration involving 13 institutions and about 30 scientists.
The goal of the FAMU experiment is the measurement of the proton Zemach radius with the measurement of the hyperfine splitting of the muonic hydrogen ground state.
This measurement is motivated by the interest to deeply understand the electromagnetic structure of the proton; a new result can give a boost to resolve the present ambiguities about its structure. Moreover the FAMU experiment can be seen as a precision QED theory test.
The experimental apparatus consists in a cryogenic and pressurized gas target, filled with a gas mixture of hydrogen and a small concentration of a high Z gas.
The target is surrounded by X-ray detectors.
The experiment is placed at the RIKEN-RAL muon facility where a high intensity muon beam is produced.
Counting the number of the X-rays emitted by the de-excitation of the Z atom as function of various laser energies it is possible to obtain a resonance plot peaked at the hyperfine energy value.
FAMU has developed a laser system that is unique
MENPHIS, MEtrology and Nonlinear optics for Precision muonic HYdrogen physicS, is a project designed to improve the laser system and
the absolute calibration procedure of the laser of FAMU. The project has been financed within the frames of an
Italian national research call (PRIN2022).
MENPHYS will strengthen the potentials of the FAMU
experiment by upgrading significantly the laser system; simplifying the coupling of the laser light into
the optical cavity around the muon beam line; increasing the accuracy in the determination of the
transition frequencies used as calibration standards of the excitation laser.
Work with us
Working in FAMU is an opportunity for an inclusive experience: it is an international collaboration (Italy, Bulgary, Poland, Japan, India, and China) yet small enough to allow and encourage its members to work on a wide range of activities. From setting up the detectors before an acquisition run, to deeply understand the various aspect of the experiment, ranging from the hardware to the physics aspect and to most theoretical point of view; not to forget the laser and its development.
INFN Milano Bicocca
INFN Napoli - Università degli studi della Campania Luigi Vanvitelli
INFN – GSSI
INP, Polish Academy of Sciences
INRNE, Bulgarian Academy of Sciences
Dalian Institute of Chemical Physics of the Chinese Academy of Sciences