Determination of fast electrons energy absorbed in the air by measuring the concentration of ozone synthesized in electron beam plasma

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Vacuum Pub Date : 2024-10-09 DOI:10.1016/j.vacuum.2024.113715

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Abstract

Method of determination of the electron beam energy absorbed in the air by measuring the concentration of ozone synthesized in electron beam plasma is proposed. It is shown that the energy of electrons absorbed in the air increases with an increase in the air gap and the atomic number of the target, and reaches the maximum value 0,036 J for a lead target at a distance 17 cm from the output foil. The highest value of the relative proportion of reflected electrons in the total electron beam energy absorbed in the air (0.45) corresponds to a lead target with a gap value 9 cm. The value of this relative proportion is determined by combination of the atomic number of surface material, the number of electron reflections and the length of the air gap. Obtained calculated average value of the ideal specific energy yield of ozone with taking into account the reflected electrons energy absorbed in the air (413 g (kW h)⁻¹) can be used to determine the value of absorbed in the air energy of the electron beam generated by the RADAN-220 accelerator, when using reaction chambers of any size and configuration, with targets and walls made of any materials.

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通过测量电子束等离子体中合成的臭氧浓度确定空气中吸收的快速电子能量

提出了通过测量电子束等离子体中合成的臭氧浓度来测定空气中吸收的电子束能量的方法。结果表明，空气中吸收的电子能量随着气隙和靶原子序数的增加而增加，在铅靶距离输出箔 17 厘米处达到最大值 0,036 J。空气中吸收的电子束总能量中反射电子的相对比例的最高值（0.45）与间隙值为 9 厘米的铅靶相对应。该相对比例值由表面材料的原子序数、电子反射次数和气隙长度共同决定。考虑到空气中吸收的反射电子能量（413 g (kW h)-1），计算得出的臭氧理想比能量产率平均值可用于确定 RADAN-220 加速器产生的电子束在空气中的吸收能量值，当使用任何尺寸和结构的反应室，以及任何材料制成的靶和壁时均可。

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.