PAC09 - List of Authors (Nie, Y.C.)

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Nie, Y.C.

Paper	Title	Page
FR5REP079	Design of a 10⁴-MHz Trapezoidal IH-RFQ	4962
	Y.C. Nie, J.E. Chen, J.X. Fang, S.L. Gao, Z.Y. Guo, Y.R. Lu, X.Q. Yan, K. Zhu PKU/IHIP, Beijing
	Funding: supported by NSFC (19775009) A trapezoidal IH-RFQ (T-IH-RFQ) is being built to accelerate ¹⁴C^+ from 40 keV to 500 keV, motivated by RFQ based ¹⁴C AMS application at Peking University. The last design of beam dynamics and the optimized results of RF structure will be presented in this paper. The length of the cavity is about 1.1m operating at {10}4MHz, with a designed transmission efficiency of more than 97%. A special feature is that the RFQ output beam energy spread is as low as 0.6% approached by the method of internal discrete bunching. On the other hand, the new RF cavity structure T-IH-RFQ was proposed for the beam dynamics design, which has higher resonant frequency than traditional four rods RFQ and IH-RFQ at the same transverse dimension. Microwave Studio (MWS) simulations have been performed to study the field distribution and power consumption characteristic of this T-IH-RFQ. The specific shunt impedance and the quality factor have been optimized. Those details will be given.

Paper

Title

Page

FR5REP079

Design of a 10⁴-MHz Trapezoidal IH-RFQ

4962

Y.C. Nie, J.E. Chen, J.X. Fang, S.L. Gao, Z.Y. Guo, Y.R. Lu, X.Q. Yan, K. Zhu
PKU/IHIP, Beijing

Funding: supported by NSFC (19775009)

A trapezoidal IH-RFQ (T-IH-RFQ) is being built to accelerate ¹⁴C^+ from 40 keV to 500 keV, motivated by RFQ based ¹⁴C AMS application at Peking University. The last design of beam dynamics and the optimized results of RF structure will be presented in this paper. The length of the cavity is about 1.1m operating at {10}4MHz, with a designed transmission efficiency of more than 97%. A special feature is that the RFQ output beam energy spread is as low as 0.6% approached by the method of internal discrete bunching. On the other hand, the new RF cavity structure T-IH-RFQ was proposed for the beam dynamics design, which has higher resonant frequency than traditional four rods RFQ and IH-RFQ at the same transverse dimension. Microwave Studio (MWS) simulations have been performed to study the field distribution and power consumption characteristic of this T-IH-RFQ. The specific shunt impedance and the quality factor have been optimized. Those details will be given.