  The photoneutron source (PNS, phase 1), an electron linear accelerator
(linac)-based pulsed neutron facility that uses the time-of-flight (TOF)
technique, was constructed for the acquisition of nuclear data from the thorium
molten salt reactor(TMSR) at the Shanghai Institute of Applied Physics (SINAP).
The neutron detector signal, with the information on the pulse arrival time,
pulse shape, and pulse height, was recorded by using a waveform digitizer
(WFD). By using the pulse height and pulse-shape discrimination (PSD) analysis
to identify neutrons and $\gamma$-rays, the neutron TOF spectrum was obtained
by employing a simple electronic design, and a new WFD-based DAQ system was
developed and tested in this commissioning experiment. The developed DAQ system
is characterized by a very high efficiency with respect to millisecond neutron
TOF spectroscopy
