Track following of Ξ^- hyperons in nuclear emulsion for the E07 experiment

The E07 experiment is expected to provide knowledge of S = -2 systems with ten times more statistics than that of the past E373 experiment. To achieve this in a reasonable time, an automated track following system is very important. This system consists of three techniques, 'emulsion surface detection', 'alignment of plate by plate connection with K^- beams' and 'followed track recognition in nuclear emulsion'. Ξ^- hyperon candidate tracks are followed from the entrance to the end point in the emulsion. If the system operates properly such that one track is processed in each plate within one minute, all Ξ^- candidate tracks can be followed successfully to their stopping points in a year. The development of softwares for the system is ongoing. (author)