A method of real-time monitoring beam output stability of intense pulsed ion beam

Xu Mo-Fei; Yu Xiang; Zhang Shi-Jian; Gennady Efimovich Remnev; Le Xiao-Yun

doi:10.7498/aps.72.20230854

Abstract

Intense pulsed ion beam (IPIB) technology has made remarkable progress in surface modification, mixing, polishing, film deposition, and nano powder synthesis in recent years. However, the surface properties of materials under IPIB irradiation are highly sensitive to beam intensity variations. Deviations from acceptable parameter range can change the surface characteristics and increase prevalence of defects. Consequently, the real-time online monitoring of beam stability during irradiation experiments and promptly identifying of pulses exhibiting significant parameter jitter are of significance in accurately analyzing results and optimizing surface modification. This study presents a fast-response pulse X-ray diagnostic system by employing EJ-200 plastic scintillator, 9266FLB photomultiplier tube, and Tektronic TDS 2024 four-channel oscilloscope. Single particle test demonstrates that the system achieves a time resolution of 6 ns, meeting the requirements for temporal response to detecting pulse X-ray signals with a half-width of ~80 ns. By adjusting the insulation magnetic field strength of the ion diode, the IPIB output level is regulated. The diagnostic system successfully captures X-rays emitted by the external magnetic insulated ion diode operating at different output levels. Simultaneously, the ion beam energy density is measured by using an infrared camera. To mitigate diagnostic errors stemming from target ablation, the maximum energy density is controlled to be below 1.32 J/cm². Analysis results establish a positive correlation between X-ray intensity and ion beam energy density. This relationship arises from the influence of the insulating magnetic field adjustment on the diode's operating voltage, which subsequently affects the bremsstrahlung radiant intensity and ion beam emission intensity. This correlation offers the potential for the real-time monitoring of IPIB beam output stability by utilizing X-ray signals. To further corroborate the synchronized changes in pulse X-ray intensity and ion beam intensity, Faraday cup is employed as an alternative to infrared imaging method for measuring ion current density. Results demonstrate that the amplitude of the X-ray signal changes synchronously with fluctuations of ion current density. It is worth noting that when the output intensity of ion beam deviates significantly (more than 10% of the preset value), the diagnostic system will respond quickly. These findings validate the efficacy of the proposed non-interceptive diagnostic method of real-time monitoring the intense pulsed ion beam output stability.

Keywords:

Authors and contacts

1.
School of Physics, Beihang University, Beijing 100191, China
2.
Beijing Advanced Innovation Center for Big Data-based Precision Medicine, Beihang University, Beijing 100191, China
3.
Beijing Key Laboratory of Advanced Nuclear Energy Materials and Physics, Beihang University, Beijing 100191, China
4.
National Research Tomsk Polytechnic University, Tomsk 634050, Russia

Corresponding author: Le Xiao-Yun, xyle@buaa.edu.cn

Funds: Project supported by the National Natural Science Foundation of China (Grant No. 12075024) and the National Defense Basic Scientific Research Program of China (Grant No. 12700002022119001).

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References

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Cited By

图 1 诊断方法示意图. 1-高压端柱; 2-阳极; 3-阳极托盘; 4-阴极; 5-阴极支撑盘; 6-电子; 7-离子束; 8-绝缘磁场线圈; 9-磁场线圈固定器; 10-有机玻璃观察窗; 11-CaF₂窗口; 12-EJ-200塑料闪烁体; 13-9266 FLB光电倍增管

Figure 1. Diagnostic method diagram. 1- High voltage input; 2-anode; 3- anode tray; 4-cathode; 5-cathode support plate; 6- electron; 7-ion beam; 8-insulated magnetic field coils; 9- magnetic field coils fixer; 10- organic glass observation window; 11-CaF₂ window; 12-EJ-200 plastic scintillator; 13-9266 FLB photomultiplier tube.

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图 2 诊断系统的时间响应测试结果

Figure 2. Time response test of the diagnostic system.

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图 3 红外相机在(a) IPIB辐照前、(b) IPIB辐照后从热沉靶背面捕获的红外图像, 以及(c)诊断系统捕获的脉冲X射线信号波形

Figure 3. The infrared image captured by the infrared camera from the backside of the heat sink target before (a) IPIB irradiation, (b) after IPIB irradiation, and (c) the pulse X-ray signal waveform captured by the diagnostic system.

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图 4 脉冲X射线信号幅值与IPIB束流能量密度之间的关系

Figure 4. Relationship between the amplitude of pulse X-ray signal and the energy density of IPIB.

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图 5 (a)轫致辐射产生示意图; (b)阳极结构实物图

Figure 5. (a) Schematic diagram of bremsstrahlung generation; (b) picture of anode structure.

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图 6 实验装置示意图. 1-高压端柱; 2-阳极; 3-阳极托盘; 4-阴极; 5-阴极支撑盘; 6-电子; 7-离子束; 8-绝缘磁场线圈; 9-磁场线圈固定器; 10-有机玻璃观察窗; 11-石墨收集体; 12-EJ-200塑料闪烁体; 13-9266 FLB光电倍增管

Figure 6. Schematic diagram of experimental equipment. 1- High voltage input; 2-anode; 3- anode tray; 4-cathode; 5-cathode support plate; 6- electron; 7-ion beam; 8- insulated magnetic field coils; 9- magnetic field coils fixer; 10-organic glass observation window; 11-graphite collector; 12-EJ-200 plastic scintillator; 13-9266 FLB photomultiplier tube.

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图 7 二极管电压、离子电流密度和X射线信号波形图

Figure 7. Diode voltage, ion current density, and X-ray signal waveform.

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图 8 X射线信号幅值与离子电流密度的对应关系

Figure 8. Correspondence between X-ray signal amplitude and ion current density.

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map

[1]	Humphries S 1980 Nucl. Fusion 20 1549 Google Scholar
[2]	Van Devender J P 1986 Plasma Phys. Control. Fusion 28 841 Google Scholar
[3]	Long K A, Tahir N A 1982 Phys. Lett. A 91 451 Google Scholar
[4]	杨海亮, 邱爱慈, 张嘉生, 何小平, 孙剑锋, 彭建昌, 汤俊萍, 任书庆, 欧阳晓平, 张国光, 黄建军, 杨莉, 王海洋, 李洪玉, 李静雅 2004 53 406 Google Scholar Yang H L, Qiu A C, Zhang J S, He X P, Sun J F, Peng J C, Tang J P, Ren S Q, Ouyang X P, Zhang G G, Huang J J, Yang L, Wang H Y, Li H Y, Li J Y 2004 Acta Phys. Sin. 53 406 Google Scholar
[5]	Mach H, Rogers D W O 1983 IEEE Trans. Nucl. Sci. 30 1514 Google Scholar
[6]	Baumung K, Bluhm H J, Goel B, Hoppé P, Karow H U, Rusch D, Fortov V E, Kanel G I, Razorenov S V, Utkin A V, Vorobjev O Y 1996 Laser Part. Beams 14 181 Google Scholar
[7]	Zhong H W, Zhang J, Shen J, Liang G Y, Zhang S J, Huang W Y, Xu M F, Yu X, Yan S, Efimovich Remnev G, Le X Y 2019 Nucl. Instruments Methods Phys. Res. Sect. B Beam Interact. with Mater. Atoms 461 226 Google Scholar
[8]	Yu X, Zhang S J, Stepanov A V, Shamanin V I, Zhong H W, Liang G Y, Xu M F, Zhang N, Kuang S, Ren J, Shang X, Yan S, Remnev G E, Le X Y 2020 Surf. Coatings Technol. 384 125351 Google Scholar
[9]	张世健, 喻晓, 钟昊玟, 梁国营, 许莫非, 张楠, 任建慧, 匡仕成, 颜莎, Gennady Efimovich Remnev, 乐小云 2020 69 115202 Google Scholar Zhang S J, Yu X, Zhong H W, Liang G Y, Xu M F, Zhang N, Ren J H, Kuang S C, Yan S, Gennady E R, Le X Y 2020 Acta Phys. Sin. 69 115202 Google Scholar
[10]	Le X Y, Zhao W J, Yan S, Han B X, Xiang W 2002 Surf. Coatings Technol. 158 – 159 14
[11]	张锋刚, 朱小鹏, 王明阳, 雷明凯 2011 金属学报 47 958 Zhang F G, Zhu X P, Wang M Y, Lei M K 2011 Acta Metall. Sin. 47 958
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[21]	Shulov V A, Novikov A S, Paikin A G, Belov A B, Lvov A F, Remnev G E 2007 Surf. Coatings Technol. 201 8654 Google Scholar
[22]	Zhang J, Zhong H W, Shen J, Yu X, Yan S, Le X Y 2020 Surf. Coatings Technol. 388 125599 Google Scholar
[23]	Kovivchak V S, Panova T V, Mikhailov K A, Knyazev E V 2013 J. Surf. Investig. 7 531 Google Scholar
[24]	Zhang Q, Mei X X, Guan T, Zhang X N, Remnev G E, Pavlov S K, Wang Y N 2019 Fusion Eng. Des. 138 16 Google Scholar
[25]	Mei X X, Zhang X N, Liu X, Wang Y N 2017 Nucl. Instruments Methods Phys. Res. Sect. B Beam Interact. with Mater. Atoms 406 697 Google Scholar
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[32]	Dong Z H, Liu C, Han X G, Lei M K 2007 Surf. Coatings Technol. 201 5054 Google Scholar
[33]	Masugata K, Chishiro E, Yatsui K 1998 Proceedings of the 12th International Conference on High-Power Particle Beams Haifa, Israel, June 12, 1998 pp222–225
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[37]	刘庆兆 1994 脉冲辐射场诊断技术 (北京: 科学出版社) 第98页 Liu Q Z 1994 Pulse Radiation Field Diagnosis Technology (Beijing: Science Press) p98
[38]	郑志鹏, 祝玉灿, 邵毓莺, 孙汉生 1986 核电子学与探测技术 6 112 Zheng Z P, Zhu Y C, Shao Y Y, Sun H S 1986 Nucl. Elec. and Det. Tech. 6 112
[39]	Xu M F, Kuang S, Yu X, Zhang S J, Yan S, Remnev G E, Le X 2023 Nucl. Instruments Methods Phys. Res. Sect. B Beam Interact. with Mater. Atoms 537 38 Google Scholar
[40]	陈伯显, 张智 2011 核辐射物理及探测学 (哈尔滨: 哈尔滨工程大学出版社) 第146页 Chen B X, Zhang Z 2011 Nuclear Radiation Physics and Detection (Harbin: Harbin Engineering University Press) p146

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Vol. 72, Issue 17 - 2023-09-05

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