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Digital 2.5 MeV fusion neutron spectrometers, based on liquid scintillators and stilbene crystal detectors, have been developed in HL-2A and EAST tokamaks.New digital pulse shape discrimination techniques, including the digital delay-line-shape (DDLS) method and moment analysis (MA), are presented and a count rate of about 45 kHz has been achieved with good neutron/gamma discrimination performances.