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利用空心阴极放电产生了尺寸为60 cm60 cm2 cm的大面积等离子体面. 在实验室条件下对大面积等离子体片的密度分布进行了测量. 由于高压放电脉冲脉宽较短, 实验中改变了测量方法, 同时, 在中等磁场影响下, 为了得到真实的等离子体密度, 进行了必要的数值修正.在放电电流为16 A时, 测量了二维的电子密度分布. 另外, 测量并讨论了其他环境参数对等离子体密度的影响. 电子密度的分布情况对与微波波束切换相当重要. 由空心阴极增强型放电产生的大面积等离子体面具有反射X波段(812 GHz) 微波需要的足够稠密的电子密度和足够均匀的密度分布, 这是等离子体面在雷达系统中取代金属面板的有利条件.A large plasma sheet with a size of 60 cm60 cm2 cm is generated in an apparatus with a hollow cathode. The electron density distribution of the large area plasma sheet is measured. Since the duration of high voltage pulse is short, we change measurement methods. Besides, modification is used for electron saturation current to get the real density. The two-dimensional electron density and electrical field distribution are calculated at discharge currents ranging from 1 to 6 A. Meanwhile we discuss other parameters related to density distribution. The electron density distribution is important for plasma sheet to steer microwave. It is encouraging that the large area plasma sheet generated by the hollow cathode is uniform and has sufficient electron density to reflect X-band (812 GHz) microwaves.
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Keywords:
- plasma density distribution /
- plasma sheet /
- Langmuir probe array
[1] Manheimer W M 1991 IEEE Trans. Plasma Sci. 19 1228
[2] Mathew J, Meger R A, Gregor J A, Pechacek R E, Fernsler R F, Manheimer W M 1999 International Radar Conference New Jersey, USA, May 8--11, 1995 p742
[3] Mathew J, Fernsler R F, Meger R A, Gregor J A, Murphy D P, Pechacek R E, Manheimer W M 1996 Phys. Rev. Lett. 77 1982
[4] Meger R A, Mathew J, Gregor J A, Pechacek R E, Fernsler R F, Manheimer W M, Robson A E 1995 Phys. Plasmas 2 2532
[5] Robson A E, Morgan R L, Meger R A 1992 IEEE Trans. Plasma Sci. 20 1036
[6] Gregor J A, Fernsler R F, Meger R A 2003 IEEE Trans. Plasma Sci. 31 1305
[7] Murphy D P, Fernsler R F, Pechacek R E, Meger R A 2002 IEEE Trans. Plasma Sci. 30 436
[8] Huddlestone R H, Leonard S L 1965 Plasma Diagnostic Techniques (New York: Academic Press) p168
[9] Hutchinson I H 2002 Principles of Plasma Diagnostic (2nd Ed.) (Cambridge: Cambridge University Press) p81
[10] Wu Z Y, Yang Y T, Wang J Y 2010 Acta Phys. Sin. 59 1890 (in Chinese) [吴振宇, 杨银堂, 汪家友 2010 59 1890]
[11] Wan J, Jia X H, Yang J H, Wang S G 2010 IEEE Trans. Plasma Sci. 38 2006
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[1] Manheimer W M 1991 IEEE Trans. Plasma Sci. 19 1228
[2] Mathew J, Meger R A, Gregor J A, Pechacek R E, Fernsler R F, Manheimer W M 1999 International Radar Conference New Jersey, USA, May 8--11, 1995 p742
[3] Mathew J, Fernsler R F, Meger R A, Gregor J A, Murphy D P, Pechacek R E, Manheimer W M 1996 Phys. Rev. Lett. 77 1982
[4] Meger R A, Mathew J, Gregor J A, Pechacek R E, Fernsler R F, Manheimer W M, Robson A E 1995 Phys. Plasmas 2 2532
[5] Robson A E, Morgan R L, Meger R A 1992 IEEE Trans. Plasma Sci. 20 1036
[6] Gregor J A, Fernsler R F, Meger R A 2003 IEEE Trans. Plasma Sci. 31 1305
[7] Murphy D P, Fernsler R F, Pechacek R E, Meger R A 2002 IEEE Trans. Plasma Sci. 30 436
[8] Huddlestone R H, Leonard S L 1965 Plasma Diagnostic Techniques (New York: Academic Press) p168
[9] Hutchinson I H 2002 Principles of Plasma Diagnostic (2nd Ed.) (Cambridge: Cambridge University Press) p81
[10] Wu Z Y, Yang Y T, Wang J Y 2010 Acta Phys. Sin. 59 1890 (in Chinese) [吴振宇, 杨银堂, 汪家友 2010 59 1890]
[11] Wan J, Jia X H, Yang J H, Wang S G 2010 IEEE Trans. Plasma Sci. 38 2006
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