Time-of-Flight System of HyperNIS Spectrometer

The main goal of the HyperNIS experiment is the search for the lightest neutron-rich hypernuclei, in particular, $$_{{\Lambda }}^{{\text{6}}}{\text{H}}$$ and the poorly studied $$_{{\Lambda }}^{{\text{6}}}{\text{He}}{\text{,}}$$ and to measure the lifetimes and production cross sections of these hypernuclei. In order to measure the masses of the hypernuclei, it is necessary to determine the momenta of their decay products, including pions. The time-of-flight (TOF) method is planned to be used to measure the pion momenta. Simulation results show that this method provides sufficient accuracy for recovering the masses of the hypernuclei. The structure of the TOF system detectors and the results of the study of their characteristics are presented.