Development of narrowband lasers for spectroscopy of antiprotonic atoms
1 Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, 85748 Garching, Germany
2 Paul Scherrer Institut, CH-5232 Villigen, Switzerland
a e-mail: Masaki.Hori@mpq.mpg.de
Published online: 20 March 2014
We review some lasers developed by the ASACUSA collaboration of CERN, to carry out spectroscopy of antiprotonic helium atoms. These lasers were based on the technique of continuous-wave injection seeding of pulsed lasers. The laser output covered the wavelength regions 264–1154 nm, with peak powers of ~ 1 MW and spectral resolutions of 6–40 MHz. The devices were recently used to measure the transition frequencies of antiprotonic helium atoms to a fractional precision of several parts in ~ 109.
© Owned by the authors, published by EDP Sciences, 2014