Research of beam matching on RFQ for CADS proton linac

Research of beam matching on RFQ for CADS proton linac
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CADS质子直线加速器RFQ光束匹配研究

DOI:
10.1142/s0218301321500270
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发表时间:
2021-04
影响因子:
1.1
通讯作者:
Yue Tao
Yue Tao
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Chao Wang;Weiping Dou;Zhijun Wang;Chi Feng;Wangsheng Wang;Weilong Chen;Yongzhi Jia;Shuhui Liu;Yuan He;Yuanshuai Qin;Yue Tao

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对于高功率射频四极加速器,通常需要设计一个大的接收腔以减少腔内的束流损失。这可能允许失配的射束传输到下游腔,这导致沿下游直线加速器的射束损失沿着。找到梁与梁的匹配条件具有重要意义。通过测量反射镜上下游的发射度来确定反射镜的匹配点,需要较长的时间,因此需要采用透射效率扫描法来寻找。本文比较了发射度、传输效率和CADS上匹配点之间的关系。结果表明,高传输效率的加权平均点可以作为传输效率的匹配点。这一结论可广泛应用于波束调试中,并已在其他射频频率调制器上开发了传输效率扫描匹配(TESM)程序。
For a high-power Radio Frequency quadrupole (RFQ) accelerator, it is often necessary to design a large acceptance to decrease the beam loss inside the RFQ cavity. This could allow a mismatched beam to transmit to downstream cavities, which causes beam loss along the downstream linac. Finding the matching condition of beam and RFQ is of great significance. The matching point of RFQ can be confirmed by measuring the emittance at the upstream and downstream of RFQ, which takes a long time, so the transmission efficiency scanning method is supposed to find. This paper compares the relationship among emittance, transmission efficiency, and matching point on CADS[Formula: see text] RFQ. The results show that the weighted average point of high transmission efficiency could be regarded as the matching point of RFQ. This conclusion can be widely used in beam commissioning, and the Transmission Efficiency Scanning-matching (TESM) code has been developed on other RFQs.
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