The development of a room temperature electron cyclotron resonance ion source (Lanzhou electron cyclotron resonance ion source No. 4) with evaporative cooling technology at Institute of Modern Physics

Sun, Limin; Qian, Changli; Guo, Junwei; Fang, Xing; Feng, Y. C.; Yang, Yao; Y., H.; Zhang, X. Z.; H., B.; Xiong, Bin; Guo, Siyuan; Ruan, Lin; Zhao, Hongwei

doi:10.1063/1.4916658

Cited by 6 publications

(1 citation statement)

References 12 publications

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“…The width of the slit was set to 0.1 mm. Figure 24 shows a typical 40 Ar 8þ emittance measurement acquired using the emittance probe [27]. The measured RMS emittance was 0.07π mm mrad.…”

Section: B Beam Commissioningmentioning

confidence: 99%

Design, fabrication, and beam commissioning of a continuous-wave four-rod rf quadrupole

Yin¹,

Yuan²,

Xia³

et al. 2016

Phys. Rev. Accel. Beams

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A new heavy-ion linac within a continuous-wave (CW) 4-rod radio-frequency quadrupole (RFQ) was designed and constructed as the injector for the separated-sector cyclotron (SSC) at the Heavy Ion Research Facility at Lanzhou (HIRFL). In this paper, we present the development of and the beam commissioning results for the 53.667 MHz CW RFQ. In the beam dynamics design, the transverse phase advance at zero current, σ 0⊥ , is maintained at a relatively high level compared with the longitudinal phase advance (σ 0∥) to avoid parametric resonance. A quasi-equipartitioning design strategy was applied to control the emittance growth and beam loss. The installation error of the electrodes was checked using a FARO 3D measurement arm during the manufacturing procedure. This method represents a new approach to measuring the position shifts of electrodes in a laboratory environment and provides information regarding the manufacturing quality. The experimental results of rf measurements exhibited general agreement with the simulation results obtained using CST code. During on-line beam testing of the RFQ, two kinds of ion beams (40 Ar 8þ and 16 O 5þ) were transported and accelerated to 142.8 keV=u, respectively. These results demonstrate that the SSC-Linac has made a significant progress. And the design scheme and technology experiences developed in this work can be applied to other future CW RFQs.

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“…The width of the slit was set to 0.1 mm. Figure 24 shows a typical 40 Ar 8þ emittance measurement acquired using the emittance probe [27]. The measured RMS emittance was 0.07π mm mrad.…”

Section: B Beam Commissioningmentioning

confidence: 99%

Design, fabrication, and beam commissioning of a continuous-wave four-rod rf quadrupole

Yin¹,

Yuan²,

Xia³

et al. 2016

Phys. Rev. Accel. Beams

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High intensity high charge state ion beam production with an evaporative cooling magnet ECRIS

Qian

Sun

Zhang

et al. 2015

Review of Scientific Instruments

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LECR4 (Lanzhou ECR ion source No. 4) is a room temperature electron cyclotron resonance ion source, designed to produce high current, high charge state ion beams for the SSC-LINAC injector (a new injector for sector separated cyclotron) at the Institute of Modern Physics. LECR4 also serves as a PoP machine for the application of evaporative cooling technology in accelerator field. To achieve those goals, LECR4 ECR ion source has been optimized for the operation at 18 GHz. During 2014, LECR4 ion source was commissioned at 18 GHz microwave of 1.6 kW. To further study the influence of injection stage to the production of medium and high charge state ion beams, in March 2015, the injection stage with pumping system was installed, and some optimum results were produced, such as 560 eμA of O(7+), 620 eμA of Ar(11+), 430 eμA of Ar(12+), 430 eμA of Xe(20+), and so on. The comparison will be discussed in the paper.

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Investigation of a large power water-cooled microwave resonance window for application with the ECR ion source

Guo

Niu

et al. 2017

Physics of Plasmas

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A large power water-cooled microwave resonance window used for the electron cyclotron resonance (ECR) ion source is investigated in this paper. The microwave characteristic simulation, thermal analysis, and structure design are deeply and successively carried out before fabrication. After the machining and welding of the components, the window is cold and hot tested. The application results demonstrate that when the input power is 2000 W, the reflected power is only 5 W. The vacuum is below 10−10 Pa, and the high power microwave operation can last 30 h continuously and reliably, which indicates that the design and assembling can achieve the high efficiency of the microwave transmission. Finally, the performance of the ECR ion source is enhanced by the improvement of the injected microwave power to the ECR plasma.

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The development of a room temperature electron cyclotron resonance ion source (Lanzhou electron cyclotron resonance ion source No. 4) with evaporative cooling technology at Institute of Modern Physics

Cited by 6 publications

References 12 publications

Design, fabrication, and beam commissioning of a continuous-wave four-rod rf quadrupole

Design, fabrication, and beam commissioning of a continuous-wave four-rod rf quadrupole

High intensity high charge state ion beam production with an evaporative cooling magnet ECRIS

Investigation of a large power water-cooled microwave resonance window for application with the ECR ion source

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