A new method of electron beam energy measurement by solenoid-induced beam rotation (SIBR) has been developed for measuring electron beam energy at the exit of the Mini-LIA

a compact electron linac developed jointly by CAEP and Tsinghua University. A planar beam formed by an 8 mm× 0.2 mm slit passes a magnetic solenoid

and measuring the solenoid-induced beam rotation on a YAG screen enables us to calculate the beam energy. The basic theory of SIBR and experiment of single-pulse electron beam energy measurement is presented in this paper. The beam energy at the exit of Mini-LIA can be determined by calculating the beam rotation angle in a solenoid. The result is in good agreement with that obtained from the acceleration voltage measurement. Finally

the error analysis is discussed

together with method characteristic of SIBR

and appropriate range for SIBR application.