V. V. Kurkuchekov, I. V. Kandaurov, N. Abed, D. A. Nikiforov, D. S. Tanygina
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引用次数: 0
Abstract
The phosphor screen made of 1-mm-thick Chromox alumina ceramic has been used to measure the current density distribution over the cross section of an intense pulsed low-energy electron beam. The properties of the screen with deposited gold coatings 30 and 300 nm thick have been investigated. The 30-nm-thick coating is characterized by a high conductivity at a good transparency (~5%) that is sufficient for studying fluorescence. As a result, it is possible to visualize a two-dimensional picture of the beam current distribution with a high spatial resolution. However, it is shown that such a coating has a limited stability against the beam with a current of ≥1.5 A (>0.6 A/cm2), an energy of 15 keV, and a duration of 1 ms. The 300-nm-thick coating is much more stable, but is non-transparent to fluorescence radiation, so an image is recorded from the backside of the scintillator plate. Using this approach, it is possible to obtain an image of the beam footprint, but with a lower spatial resolution.
用1毫米厚的Chromox氧化铝陶瓷制作的荧光屏测量了强脉冲低能电子束横截面上的电流密度分布。研究了30 nm和300 nm厚的金镀层对丝网性能的影响。30nm厚的涂层具有高导电性和良好的透明度（~5%），足以用于研究荧光。因此，有可能以高空间分辨率可视化光束电流分布的二维图像。然而，研究表明，这种涂层对电流≥1.5 a （>0.6 a /cm2）、能量为15 keV、持续时间为1 ms的光束具有有限的稳定性。300纳米厚的涂层更加稳定，但对荧光辐射不透明，因此从闪烁板的背面记录图像。使用这种方法，可以获得光束足迹的图像，但具有较低的空间分辨率。
期刊介绍：
Instruments and Experimental Techniques is an international peer reviewed journal that publishes reviews describing advanced methods for physical measurements and techniques and original articles that present techniques for physical measurements, principles of operation, design, methods of application, and analysis of the operation of physical instruments used in all fields of experimental physics and when conducting measurements using physical methods and instruments in astronomy, natural sciences, chemistry, biology, medicine, and ecology.
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