Design of the Calorimeter for High-Power RF Negative Ion Source
- Ms. Wendou YAN
- Dr. Dong LI (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology)
To study and optimize negative ion production for the HUST (Huazhong University of Science and Technology) radio frequency negative ion source, an instrumented calorimeter is under construction with the aim of testing beam characteristics and verifying the source proper operation. Based on the comparative analysis of different calorimeter structures and actual requirements of the HUST source, this paper chooses a quasi-adiabatic physical structure for calorimeter which is composed of 8×8 copper targets and a cooling backplane for beam diagnosis. For this structure, the main error of existing beam power calculation model comes from water-cooling, which is corrected and greatly reduced in this paper. The calorimeter can sustain the high power loads (up to 3 MW/m2) and can generally reflect the distribution of it. According to the thermal analysis and physical requirements, a calorimeter has been designed and manufactured. In addition, the experiment has been carried out. This paper gives an overview of the design and the experiment result.