Chen Jia'er (Chinese: 陈佳洱; born 1 October 1934) is a Chinese nuclear physicist, an accelerator physicist and an academician of the Chinese Academy of Sciences (CAS). Chen was born in Shanghai, and graduated from the department of physics of Northeast China People's University (now Jilin University) in Changchun in 1954. From 1955, he was a teacher in the department of at Peking University, and was elevated to vice department chair. From 1963 to 1965, Chen was invited by British Royal Society and became a visiting scholar in department of nuclear physics at Oxford University and , studying serial electro-static accelerator and synchrotron. From 1982 to 1984, he was a visiting scientist at Stony Brook University and Lawrence Berkeley National Laboratory. In August, 1984, Chen became the vic