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Transmission-type miniature micro-beam modulated X-ray source based on space application

Mou Huan Li Bao-Quan Cao Yang

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Transmission-type miniature micro-beam modulated X-ray source based on space application

Mou Huan, Li Bao-Quan, Cao Yang
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  • X-ray sources have been extensively penetrated into all aspects in daily life, such as pharmaceutical analysis, X-ray diagnostics, and radioactive static elimination. Along with the burgeoning field of deep exploration, all kinds of X-ray sources are fabricated to meet the needs of space applications. Therefore a design proposal of a transmission-type miniature micro-beam modulated X-ray source, in allusion to the space application of X-ray sources, is proposed and its theoretical model is constructed. In contrast with the traditional X-ray sources, a grid electrode is added and three focusing electrodes are chosen and used. Amplitude modulation and pulse modulation of X-rays, by controlling the voltage value of the grid electrode, are realized. Electrons are restrained to pass when the grid electrode is loaded with a negative voltage and no X-ray photons are produced. When loaded with a positive voltage, the grid electrode lets electrons get through and finally reaches up to the anode electrode. Three focusing electrodes, meanwhile, are used to make the electron beam converge and finally focus on the anode target. The thickness of the transmission-type target material is considerable, considering it to be a key parameter influencing the conversion efficiency of X-rays. If the target thickness is too thin, only a part of electrons can convert into X-ray. On the contrary, when the target thickness is too thick, the produced X-ray intensity is low too. That is because some X-ray photons are absorbed by the anode target material even though all of the electrons convert into X-ray. And the optimum target thickness, in different anode voltage values and different target materials, is simulated using charged particle optical simulation software, and the results are presented in a table. In addition, the influence of grid voltage value on electron beam trajectory is also taken into account and finally a 150-m-diameter focusing spot is obtained. The prototype model is fabricated via coating film on the anode and the single-step brazing process in a vacuum furnace. After the test platform is set up, the spectrum feature of tungsten target is attained. And it is analyzed that the X-ray intensity is related to the grid electrode voltage value. The feasibility of grid amplitude modulation and grid pulse modulation are verified in the end. As a multifunctional modulated X-ray source, it will have more important scientific significance and space application prospects, and be used in inter-satellite X-ray communication, ionization blackout area communication, planetary science, pulsar simulation and single event effect simulation of space radiation environment.
      Corresponding author: Mou Huan, mouhuan@nssc.ac.cn
    • Funds: Project supported by the Strategic Pilot Projects in Space Science of Chinese Academy of Sciences (Grant No. XDA04060900).
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    Liu Z, Yang G, Lee Y Z, Bordelon D, Lu J, Zhou O 2006 Appl. Phys. Lett. 89 103111

    [2]

    Haga A, Senda S, Sakai Y, Mizuta Y, Kita S, Okuyamaa F 2004 Appl. Phys. Lett. 84 2208

    [3]

    Senda S, Sakai Y, Mizuta Y, Kita S, Okuyamaa F 2004 Appl. Phys. Lett. 85 5679

    [4]

    Sugie H, Tanemura M, Filip V, Iwata K, Takahashi K, Okuyamab F 2001 Appl. Phys. Lett. 78 2578

    [5]

    Song Y H, Kin J W, Jeong J W, et al. 2012 IEEE 25th International Vacuum Nanoelectronics Conference Jeju, Korea 2012 p102

    [6]

    Jeong J W, Kin J W, Kang J T, Choi S, Ahn S, Song Y H 2013 Nanotechnology 24 085201

    [7]

    Jablonski D G 2009 22nd International Meeting of the Satellite Di-vision of The Institute of Navigation Savannah, the United States, September 22-25, 2009 p1458

    [8]

    Deng N Q, Zhao B S, Sheng L Z, Yan Q R, Yang H, Liu D 2013 Acta Phys. Sin. 62 060705 (in Chinese) [邓宁勤, 赵宝升, 盛立志, 鄢秋荣, 杨颢, 刘舵 2013 物理学报 62 060705]

    [9]

    Ma X F, Zhao B S, Sheng L Z, Liu Y A, Liu D, Deng N Q 2014 Acta Phys. Sin. 63 106701 (in Chinese) [马晓飞, 赵宝升, 盛立志, 刘永安, 刘舵, 邓宁勤 2014 物理学报 63 106701]

    [10]

    Sheng L Z, Zhao B S, Liu Y A 2015 Proc. SPIE 9207 920716

    [11]

    Yang Q, Ge L Q, Gu Y, Hua Y T, Luo Y Y 2013 Spectroscopy and Spectral Analysis 33 1130 (in Chinese) [杨强, 葛良全, 谷懿, 花永涛, 罗耀耀 2013 光谱学与光谱分析 33 1130]

    [12]

    Piniese(translated by He L) 1963 Fine-Focus X-Ray Tube and Its Application in Structural Analysis (Beijing: Science Press) pp30-32 (in Chinese) [皮涅斯 著 (何荦 译) 1963 细聚焦X射线管及其在结构分析中的应用(北京: 科学出版社)第30-32页]

    [13]

    Liu Z J, Zhang J, Yang G, Cheng Y, Zhou O, Lu J P 2006 Rev. Sci. Instrum. 77 054302

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Publishing process
  • Received Date:  12 April 2016
  • Accepted Date:  04 May 2016
  • Published Online:  05 July 2016

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