Beam dynamics and RF design of trapezoidal IH-RFQ with low energy spread

NIE Yuan-Cun; LU Yuan-Rong; CHEN Jia-Er; YAN Xue-Qing; GUO Zhi-Yu; ZHU Kun; FANG Jia-Xun

doi:10.1088/1674-1137/33/S2/027

Chinese Physics C> 2009, Vol. 33> Issue(S2) : 105-108 DOI: 10.1088/1674-1137/33/S2/027

Beam dynamics and RF design of trapezoidal IH-RFQ with low energy spread

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Abstract：
Beam dynamics and RF design have been performed of a new type trapezoidal IH-RFQ operating at 104 MHz for acceleration of ¹⁴C⁺ in the framework of RFQ based ¹⁴C AMS facility at Peking University. Low energy spread RFQ beam dynamics design was approached by the method of internal discrete bunching. ¹⁴C⁺ will be accelerated from 40 keV to 500 keV with the length of about 1.1 m. The designed transmission efficiency is better than 95% and the energy spread is as low as 0.6%. Combining the beam dynamics design, a trapezoidal IH-RFQ structure was proposed, which can be cooled more easily and has better mechanical performance than traditional RFQ. Electromagnetic field distribution was simulated by using CST Microwave Studio (MWS). The specific shunt impedance and the quality factor were optimized primarily.

References

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NIE Yuan-Cun, LU Yuan-Rong, CHEN Jia-Er, YAN Xue-Qing, GUO Zhi-Yu, ZHU Kun and FANG Jia-Xun. Beam dynamics and RF design of trapezoidal IH-RFQ with low energy spread[J]. Chinese Physics C, 2009, 33(S2): 105-108. doi: 10.1088/1674-1137/33/S2/027

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Received: 2009-01-05
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Beam dynamics and RF design of trapezoidal IH-RFQ with low energy spread

Corresponding author: NIE Yuan-Cun,

Received Date: 2009-01-05

Accepted Date: 1900-01-01

Available Online: 2009-01-08

Abstract:

Beam dynamics and RF design have been performed of a new type trapezoidal IH-RFQ operating at 104 MHz for acceleration of ¹⁴C⁺ in the framework of RFQ based ¹⁴C AMS facility at Peking University. Low energy spread RFQ beam dynamics design was approached by the method of internal discrete bunching. ¹⁴C⁺ will be accelerated from 40 keV to 500 keV with the length of about 1.1 m. The designed transmission efficiency is better than 95% and the energy spread is as low as 0.6%. Combining the beam dynamics design, a trapezoidal IH-RFQ structure was proposed, which can be cooled more easily and has better mechanical performance than traditional RFQ. Electromagnetic field distribution was simulated by using CST Microwave Studio (MWS). The specific shunt impedance and the quality factor were optimized primarily.

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Beam dynamics and RF design of trapezoidal IH-RFQ with low energy spread

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