Particle sorting apparatus and particle sorting method

A flow cytometry system, comprising:

• a first detector of a first scatter channel to detect a first light scatter generated by a particle flowing in a flow channel of a fluid sample and passing through a first laser beam;
• a second detector of a second scatter channel to detect a second light scatter generated by the particle flowing in the flow channel of the fluid sample and passing through a second laser beam;
• and
• circuitry configured to
• output a first scatter pulse information and a first detection time of the first light scatter channel, a second scatter pulse information and a second detection time of the second light scatter channel,
• store the first detection time and the second detection time, and
• calculate a laser delay for the particle by calculating a time difference between the second detection time and the first detection time,
• wherein the first laser beam and the second laser beam are irradiated to the particle in different positions of the flow channel.