Upgrades of the linac system at CAMD

The 180 - 200 MeV linac is an injector of Center of Advanced Microstructures and Devices (CAMD) 1.3 or 1.5 GeV accelerator, and was configured, installed and commissioned more than 10 years ago. CAMD has pursued the upgrades of linac due to the bad reliability and performance of linac. In the paper, the latest operation parameters of linac are introduced, the results of recent upgrades of linac, such as the linac control system upgrade, the linac timing system upgrade, the master oscillator upgrade, and the klystron focusing power supply upgrades are presented, and the linac energy increase is discussed.