Since the 1st generation experiment, E89-009, which was successfully carried out as a pilot experiment of (e,e'K+) hypernuclear spectroscopy at JLab Hall C in 2000, precision hypernuclear spectroscopy by the (e,e'K+) reactions made considerable progress. It has evolved to the 2nd generation experiment, E01-011, in which a newly constructed high resolution kaon spectrometer (HKS) was installed and the "Tilt method" was adopted in order to suppress large electromagnetic background and to run with high luminosity. Preliminary high-resolution spectra of (7)(Lambda)He and (28)(Lambda)Al together with that of (12)(Lambda)B that achieved resolution better than 500 keV(FWHM) were obtained. The third generation experiment, E05-115, has completed data taking with an experimental setup combining a new splitter magnet, high resolution electron spectrometer (HES) and the HKS used in the 2nd generation experiment. The data were accumulated with targets of (7)Li, (9)Be, (10)B, (12)C and (52)Cr as well as with those of CH(2) and H(2)O for calibration. The analysis is under way with particular emphasis of determining precision absolute hypernuclear masses.
In this article, hypernuclear spectroscopy program in the wide mass range at JLab Hall C that has undergone three generation is described.