  The timing measurement of charged particles using silicon detector is widely
used in synchrotron source as X-ray detectors, in time-of-flight mass
spectrometer and especially in large collider experiment. To reduce the
drastically event pile-up of high-luminosity large hadron collider (HL-LHC), a
new concept of 4-dimension detector including timing and positon has been
proposed. One of the candidates for the 4-dimension detector is a new kind of
silicon detector called Low Gain Avalanche Diode (LGAD). In China, Institute of
High Energy Physics (IHEP) Chinese Academic Science cooperated with Novel
Device Laboratory (NDL) at Beijing Normal University have fabricated a series
of LGAD sensors. The characterization of the first prototype of IHEP-NDL
sensors is presented including leakage current and sensor capacitance
measurement. A test system for the time resolution of jitter term using
pico-second laser and fast sampling rate oscilloscope is also setup, and the
time resolution of 10 ps can be achieved with these sensors.
