Speaker
Description
We will present the preliminary test results of the USTC first batch LGAD, which is designed by USTC focusing on deep implantation and carbon diffusion techniques to improve the irradiation hardness. The design follows the ATLAS-HGTD specifications with 50 um active thickness and 8-inch wafers are used. In the first prototyping run, 6 wafer splits with different gain layer dose and depth have been fabricated. The test results include I-V, C-V, and TCT with both laser and the beta source. USTC group also focuses on the large array characterization with the self-designed readout system and probe-cards for the coming application's QA requirement on ATLAS. We have achieved stable and low noise measurement on the 5x5 and 15x15 HPK prototype arrays for HGTD.
