Radiation hardness study for future hadron collider

The detectors with high radiation tolerance are required by future hadron collider experiments which expect higher luminosity and higher center-of-mass energy. Improvements of radiation hardness of LGAD detectors are needed because they are expected to be used as inner trackers for future hadron collider experiments.

One of the major problems of radiation hardness of LGAD detectors is acceptor removal:shallow dopants in the gain layer of LGAD detectors are reduced by radiation damage. Two novel ideas to protect dopants are tested in order to suppress the effects of acceptor removal. In this talk, concepts of two ideas and the measurement results of proton irradiated samples are reported.