Continuous operation of 2.45-GHz microwave proton source for 306 hours with more than 50 mA DC beam

Peng, Shixiang; Zhang, Ailin; Ren, Haitao; Zhang, Tao; Xu, Yuan; Zhang, Jingfeng; Gong, J. X.; Guo, Zhiyu; Chen, Jiaer

doi:10.1088/1674-1056/24/7/075203

Cited by 10 publications

(4 citation statements)

References 4 publications

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“…Experiment was completed with the same source on the same test bench in Ref. [6]. A standard compact PKU PME-CRIS with a water-cooled three-electrode extraction system is used for CW H + ion beam generation.…”

Section: The 300-hours Continuous Running Results and Its Emittancementioning

confidence: 99%

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New progress on beam availability and reliability of PKU high intensity CW proton ECR ion source

et al. 2017

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The stability and reliability of an ion source and its beam availability are extremely significant for any accelerator, especially for those high current long term CW operation ones like ADS. Although the first high quality 306-hours continuous wave (CW) operating curve at 50 mA@35 keV has been successfully obtained with a standard compact 2.45 GHz ECR ion source at Peking University (PKU), but the uncertainties that caused beam trips before are unacceptable during an accelerator real operation and should be eliminated. Meanwhile, no permission will be given when the beam power is upgraded from 50 mA@35 keV to 50 mA@50 keV. To improve the PKU CW proton source quality, several upgrades were done recently. After those improvements, a new long term CW proton beam experiment at 50 mA@50 keV was carried out in June 2016. The total running time is 300.5 hours, including near 6 hours ion source preparation and 294 hours non-disturb continuous operation. Within the continuous 13 days operation, no beam-off happened, no spark was observed, no beam drop appeared, no interrupting action was needed, and only a few beam fluctuations caused by the air conditional failure occurred. Beam availability and reliability within the 294 hours is 100%. The root-mean-square (RMS) emittance of this 50 mA@50 keV CW proton beam is about 0.186 π.mm.mrad. A careful inspection of the ion source was done after this long term operation and no obvious damage was found. The restart experimental results obtained after the ion source inspection prove the high repeatability of PKU PMECRIS. In addition, a 130-mA H + beam was obtained at 50 kV with duty factor of 10% (100 Hz/1 ms) with this source. Details will be presented in this paper.

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Section: The 300-hours Continuous Running Results and Its Emittancementioning

confidence: 99%

“…With some improvements described in Refs. [6] and [7], we were succeed to obtain a 306-hours continuous operation curve of 50 mA@35 kV CW proton beam at the beginning of 2015 on PKU ion source test bench. During that 13-days running, neither sparks nor plasma generator failure were observed.…”

Section: Introductionmentioning

confidence: 99%

New progress on beam availability and reliability of PKU high intensity CW proton ECR ion source

et al. 2017

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“…ECRIT具有无阴极烧蚀特点, 除了用于空间飞行器控制 [1,2] , 还能用于材料处理等方面 [3,4] . 目前国外研究出10 cm和2 cm ECRIT, 并分别应用于HAYABUSA [2,5] 和50与70 kg微小卫星 [6,7] .…”

Section: 引言unclassified

Numerical simulation of influence of magnetic field on plasma characteristics and surface current of ion source of 2-cm electron cyclotron resonance ion thruster

Xu¹,

Yang²,

Fu³

et al. 2021

Acta Phys. Sin.

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The cathode-less miniature electron cyclotron resonance ion thruster (ECRIT) has the advantages of long-life and simple-structure. In the ECRIT ion source, the plasma distribution will affect the beam extraction, and the relative position of the ECR layer determined by the magnetic field structure and the flat-ring antenna together affect the plasma distribution. Due to the sheath, the ions or electrons in the plasma will be accelerated to sputter the surface of wall and induce plasma loss. It is important to investigate the wall currents and plasma characteristics. Therefore, particle-in-cell with Monte Carlo collision (PIC/MCC) model is established in this article to study the influence of the magnetic field structure on the plasma and wall current characteristics of 2-cm ECRIT ion source. The calculation results show that the electrons are confined near the ECR layer of antenna by the magnetic mirror, which leads the plasma to be distributed near the ECR layer. When the ECR layer is located on the upstream side of the flat-ring antenna, the plasma is concentrated between the antenna and magnet rings, and the ion density in front of the grid is lowest, which results in a lower ion beam current extracted from ion source and a lower current on the surface of magnetic ring and antenna. When the ECR layer is located on the downstream side of the flat-ring antenna, the plasma density near the upstream side of the antenna and grid is high, which results in higher ion beam current extracted from the ion source and higher current on the surface of antenna and magnetic ring. The plasma distribution and the total wall current of the ion source are affected weakly by the magnetic field structure. In this magnetic field structure, the ion sputtering on the flat-ring antenna is serious. Although such a magnetic field design can increase the extracted ion beam current, it will shorten the working life of the ion source. In the future, when designing a new thruster, it is necessary to weigh the ion current of extraction and lifetime to select the appropriate magnetic field structure.

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“…As a member of the Chinese initiative accelerator driven system (CIADS) project, Peking University (PKU) is undertaking the R & D program on high current DC hydrogen ion source development. [1] To meet the requirements of the CIADS project, Peking University has improved the compact permanent magnet 2.45-GHz ECR ion source (PKU PMECRIS). [2] To measure the performance of PKU PME-CRIS, Faraday cup and emittance meter for high intensity beam are needed.…”

Section: Introductionmentioning

confidence: 99%

A fast emittance measurement unit for high intensity DC beam

Zhang¹,

Ren²,

Shi³

et al. 2018

Chinese Phys. B

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A combined unit, which has the ability to measure the current and emittance of the high intensity direct current (DC) ion beam, is developed at Peking University (PKU). It is a multi-slit single-wire (MSSW)-type beam emittance meter combined with a water-cooled Faraday Cup, named high intensity beam emittance measurement unit-6 (HIBEMU-6). It takes about 15 seconds to complete one measurement of the beam current and its emittance.

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Continuous operation of 2.45-GHz microwave proton source for 306 hours with more than 50 mA DC beam

Abstract: Shi-Xiang(彭士香) a) † , Zhang Ai-Lin(张艾霖) a)b) , Ren Hai-Tao(任海涛) a) , Zhang Tao(张滔) a) , Xu Yuan(徐源) a) , Zhang Jing-Feng(张景丰) a) , Gong Jian-Hua(龚建华) a) , Guo Zhi-Yu(郭之虞) a) , and Chen Jia-Er(陈佳洱) a)b) a) SKLNST& IHIP

Cited by 10 publications

References 4 publications

New progress on beam availability and reliability of PKU high intensity CW proton ECR ion source

New progress on beam availability and reliability of PKU high intensity CW proton ECR ion source

Numerical simulation of influence of magnetic field on plasma characteristics and surface current of ion source of 2-cm electron cyclotron resonance ion thruster

A fast emittance measurement unit for high intensity DC beam

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Continuous operation of 2.45-GHz microwave proton source for 306 hours with more than 50 mA DC beam

Abstract: Shi-Xiang(彭士香) a) † , Zhang Ai-Lin(张艾霖) a)b) , Ren Hai-Tao(任海涛) a) , Zhang Tao(张 滔) a) , Xu Yuan(徐 源) a) , Zhang Jing-Feng(张景丰) a) , Gong Jian-Hua(龚建华) a) , Guo Zhi-Yu(郭之虞) a) , and Chen Jia-Er(陈佳洱) a)b) a) SKLNST& IHIP

Cited by 10 publications

References 4 publications

New progress on beam availability and reliability of PKU high intensity CW proton ECR ion source

New progress on beam availability and reliability of PKU high intensity CW proton ECR ion source

Numerical simulation of influence of magnetic field on plasma characteristics and surface current of ion source of 2-cm electron cyclotron resonance ion thruster

A fast emittance measurement unit for high intensity DC beam

Contact Info

Product

Resources

About

Abstract: Shi-Xiang(彭士香) a) † , Zhang Ai-Lin(张艾霖) a)b) , Ren Hai-Tao(任海涛) a) , Zhang Tao(张滔) a) , Xu Yuan(徐源) a) , Zhang Jing-Feng(张景丰) a) , Gong Jian-Hua(龚建华) a) , Guo Zhi-Yu(郭之虞) a) , and Chen Jia-Er(陈佳洱) a)b) a) SKLNST& IHIP