Dragon-I injector based on the induction voltage adder technique

• Main Authors: Zhang Kaizhi, Wen Long, Li Hong, Dai Zhiyong, Wang Wendou, Zhang Wenwei, Wang Meng, Li Jin, Yang Anming, Xie Yutong, Chen Sifu, Wang Huacen, Dai Guangsen, Shi Jinshui, Zhang Linwen, Deng Jianjun, Ding Bonan
• Format: Article
• Language: English
• Published: American Physical Society 2006-08-01
• Series: Physical Review Special Topics. Accelerators and Beams
• Online Access: http://doi.org/10.1103/PhysRevSTAB.9.080401

The Dragon-I injector based on the induction voltage adder technique is introduced. Twelve ferrite loaded induction cells are connected in a series through central conducting stalks to achieve a pulsed voltage higher than 3.5 MV across the diode. Electrons are extracted from the velvet emitter and guided through the anode pipe by the magnets placed inside the cathode and anode shrouds. Measurements at the exit of injector show that, with an electric field of 200  kV/cm near the velvet surface and suitable magnetic field distribution, an electron beam up to 2.8 kA can be obtained with a normalized emittance of 1040π   mm mrad, and energy spread of 2.1% (3σ) around the central energy of 3.5 MeV.