Influence of magnetic field of a radial focusing external magnetically insulated diode on emission behavior of intense pulsed ion beam

Xu, Ming; Kuang, Shicheng; Yu, Xiaojun; Zhang, Shijian; Yan, Sha; Ремнев, Г. Е.; Le, Xinyi

doi:10.1016/j.nimb.2023.01.017

Cited by 3 publications

(1 citation statement)

References 28 publications

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“…通常要求诊断系统的时间响应半高宽不超过被测辐射脉冲半高宽的 1/3 [37] . 本研究采用单粒子法(宇宙线粒子) [38] 对系统的时间响应特性进行测量, 结果如图2所示. 所搭建的诊断系统响应时间半高宽为6 ns, 远小于 BIPPAB-450输出脉冲的80 ns半高宽, 因此能够满足测试要求.…”

Section: 诊断系统的响应时间unclassified

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

Xu¹,

Zhang²,

Ремнев³

et al. 2023

Acta Phys. Sin.

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Intense pulsed ion beam (IPIB) technology has witnessed remarkable advancements 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 ranges can result in alterations in surface characteristics and an increased prevalence of defects. Consequently, real-time online monitoring of beam stability during irradiation experiments and prompt identification of pulses exhibiting significant parameter jitter hold paramount importance for accurate result analysis and optimization of surface modification. This study presents a fast-response pulse X-ray diagnostic system 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 temporal response requirements for 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 using an infrared camera. To mitigate diagnostic errors stemming from target ablation, the maximum energy density is controlled below 1.32 J/cm<sup>2</sup>. 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 impacts the bremsstrahlung radiant intensity and ion beam emission intensity. This correlation offers the potential for real-time monitoring of IPIB beam output stability utilizing X-ray signals. To further corroborate the synchronized changes in pulse X-ray intensity and ion beam intensity, Faraday cup are employed as an alternative to infrared imaging methods for measuring ion current density. Results demonstrate that the amplitude of the X-ray signal exhibits a synchronous change to fluctuations in ion current density. Notably, when the beam output intensity deviates significantly (exceeding 10% of the predetermined value), the diagnostic system promptly responds. These findings validate the efficacy of the proposed non-interceptive diagnostic method for real-time monitoring of intense pulsed ion beam output stability.

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Section: 诊断系统的响应时间unclassified

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

Xu¹,

Zhang²,

Ремнев³

et al. 2023

Acta Phys. Sin.

Self Cite

View full text Add to dashboard Cite

show abstract

Investigation of intense pulsed ion beam generation by a magnetically insulated ion diode at a reduced impedance

Kaikanov,

Nauruzbayev,

Abduvalov

et al. 2023

Vacuum

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Microstructure Formation and Mechanical Properties of Metastable Titanium-Based Gradient Coating Fabricated via Intense Pulse Ion Beam Melt Mixing

Zhang

et al. 2023

Materials

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The unique flash heating characteristics of intense pulsed ion beams (IPIB) offer potential advantages to fabricate high-performance coatings with non-equilibrium structures. In this study, titanium-chromium (Ti-Cr) alloy coatings are prepared through magnetron sputtering and successive IPIB irradiation, and the feasibility of IPIB melt mixing (IPIBMM) for a film-substrate system is verified via finite elements analysis. The experimental results reveal that the melting depth is 1.15 μm under IPIB irradiation, which is in close agreement with the calculation value (1.18 μm). The film and substrate form a Ti-Cr alloy coating by IPIBMM. The coating has a continuous gradient composition distribution, metallurgically bonding on the Ti substrate via IPIBMM. Increasing the IPIB pulse number leads to more complete element mixing and the elimination of surface cracks and craters. Additionally, the IPIB irradiation induces the formation of supersaturated solid solutions, lattice transition, and preferred orientation change, contributing to an increase in hardness and a decrease in elastic modulus with continuous irradiation. Notably, the coating treated with 20 pulses demonstrates a remarkable hardness (4.8 GPa), more than twice that of pure Ti, and a lower elastic modulus (100.3 GPa), 20% less than that of pure Ti. The analysis of the load-displacement curves and H-E ratios indicates that the Ti-Cr alloy coated samples exhibit better plasticity and wear resistance compared to pure Ti. Specifically, the coating formed after 20 pulses exhibits exceptional wear resistance, as demonstrated by its H3/E2 value being 14 times higher than that of pure Ti. This development provides an efficient and eco-friendly method for designing robust-adhesion coatings with specific structures, which can be extended to various bi- or multi-element material systems.

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Influence of magnetic field of a radial focusing external magnetically insulated diode on emission behavior of intense pulsed ion beam

Cited by 3 publications

References 28 publications

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

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

Investigation of intense pulsed ion beam generation by a magnetically insulated ion diode at a reduced impedance

Microstructure Formation and Mechanical Properties of Metastable Titanium-Based Gradient Coating Fabricated via Intense Pulse Ion Beam Melt Mixing

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