High-power test and thermal characteristics of a new radio-frequency quadrupole cavity for the Japan Proton Accelerator Research Complex linac
High-power test and thermal characteristics of a new radio-frequency quadrupole cavity for the Japan Proton Accelerator Research Complex linac
复制标题
日本质子加速器研究中心直线加速器新型射频四极腔的高功率测试和热特性
DOI：
10.1103/physrevstab.16.040102
复制
发表时间：
2013
影响因子：
--
通讯作者：
K. Nanmo
中科院分区：
文献类型：
--
作者：
Y. Kondo;T. Morishita;K. Hasegawa;E. Chishiro;K. Hirano;T. Hori;H. Oguri;F. Sato;S. Shinozaki;T. Sugimura;H. Kawamata;F. Naito;Y. Fukui;K. Futatsukawa;K. Nanmo
我们对J-PARC直线加速器的新型射频四极管(RFQ II)进行了高功率测试。RFQ II被开发为备用RFQ，因为运行中的J-Parc RFQ遇到了火花问题。首先，对RFQ II进行条件化处理，50h后，RFQ II变得非常稳定，标称功率和占空比分别为330kW和3%。其次，由于RFQ II的谐振频率是通过改变冷却水的温度来调谐的，所以我们测量了它的热性能。对频率响应进行了测量，并与有限元仿真结果进行了比较，验证了简化的二维模型较好地再现了实验数据。还测量了磁场分布随射频负载和冷却水温度变化的差异，没有观察到严重的磁场失真。因此，我们得出结论，RFQ II可以作为一个高功率的射频腔来使用。
We performed a high-power test of a new radio-frequency quadrupole (RFQ II) for the J-PARC linac. RFQ II was developed as a spare RFQ because the operating J-PARC RFQ has suffered from a sparking problem. First, the conditioning of RFQ II was carried out; after 50 h of conditioning, RFQ II became very stable with a nominal power and duty of 330 kW and 3%, respectively. Next the thermal properties were measured because the resonant frequency of RFQ II is tuned by changing the temperature of the cooling water. The frequency response was measured and compared to finite-element method simulation results, confirming that the simple two-dimensional model reproduces the experimental data well. The differences in the field distribution with changes in the rf loading and the cooling-water temperature were also measured, and no serious field distortion was observed. Therefore, we conclude that RFQ II can perform well as a high-power rf cavity.