Speaker
Description
Capacitive-coupled Low-Gain Avalanche Diode (AC-LGAD) is a semiconductor tracking detector with precise timing resolution and spatial resolution developed by KEK and Tsukuba group collaborating with Hamamatsu Photonics K.K. (HPK). A 100um x 100um pitch pixel type sensor and 80um pitch with 10mm length strip type sensor with 50um active thickness have been successfully developped with fully uniform gain across sensor active area while 50um x 50um pitch pixel type sensor must be working based on simulation although hard to test without readout ASIC. In this presentation we will discuss two things a) the timing resolution improvement by the thinner active thickness sensor (20um) b) improvement of radiation tolerance with the gain layer modification to minimize acceptor removal effect to operation voltage increase.
