Effect of 2.5 MeV proton irradiation on the critical parameters of composite HTS tapes
Effect of 2.5 MeV proton irradiation on the critical parameters of composite HTS tapes
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2.5 MeV质子辐照对复合高温超导带关键参数的影响
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
G. Mikhailova
中科院分区：
文献类型：
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作者：
L. Antonova;T. Demikhov;A. Troitskiĭ;A. Didyk;A. Kobzev;A. Yurasov;S. Samoilenkov;G. Mikhailova
本文研究了日本SuperOx公司生产的GdBCO基高温超导带材在6.1×1014p/cm2~1×1017p/cm2能量范围内对2.5 MeV质子辐照的耐受性。研究了临界参数对辐射通量的依赖关系。在T=77K时，样品的自场辐射对临界电流有很大的影响。临界温度的变化不是很明显。在实验条件下(T=77K)，质子辐照后的临界电流没有增加。
位于杜布纳的范德格拉夫加速器被用于辐射。用直流电阻法测量了样品的T_c和IC。测得抗辐射阈值Φ=6×1015p/cm~2。这意味着临界电流不会下降超过初始值的20%。在Φ=6×1016p/cm~2和77K无外加磁场时，电流减小了一个数量级以上。(2015Wiley-VCH Verlag GmbH&Co.KGaA，Weinheim)
In this paper we study the radiation resistance of high temperature superconductor (HTS) tapes based on GdBCO produced by SuperOx-Japan Company to proton irradiation with an energy of 2.5 MeV in the fluence range from 6.1×1014 p/cm2 to 1×1017 p/cm2. The dependences of critical parameters on radiation fluencies were investigated. Strong influence of radiation on critical current is revealed at T=77 K in the self-field of the sample. The change of the critical temperature dependence is not so significant. The critical current increase after proton irradiation was not revealed at the experiment conditions (at T = 77 K).
The Van de Graaff accelerator in Dubna was used for the iradiation. Measurements of Tc and Ic of the samples were carried out by the DC resistive method. A radiation resistance threshold Φ = 6×1015 p/cm2 was determined. This means that the critical current does not drop by more than 20% of the initial value. The current decreases by more than an order of magnitude at Φ = 6×1016 p/cm2 and 77 K without external magnetic field. (© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)