The Cracow code—an interactive method of sophisticated online analysis

A crucial issue in many complex experiments is the flexibility and ease of the online data analysis. Here we present an easy-to-learn and intuitive-to-operate method of interactive online analysis for use in projectile fragmentation induced gamma-ray spectroscopy experiments at the GSI facility (the RISING experiments). With a sequence of dialogue boxes the experimenter can create a complex definition, which will produce a conditional spectrum. These definitions can be immediately applied by the online analysis, which runs in parallel as a separate program. Some problems regarding the logic of gating conditions are discussed.