| 幂律电子谱轫致辐射积分的快速计算 |
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| 引用本文： | 李友平,甘为群.幂律电子谱轫致辐射积分的快速计算[J].天文学报,2011,52(3). |
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| 作者姓名： | 李友平 甘为群 |
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| 作者单位： | 中国科学院紫金山天文台,南京,210008 |
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| 摘 要： | SSW(Solar SoftWare)的能量电子产生X光子的轫致辐射积分计算发展到版本2时,其性能相比初始的版本1提高很多.在版本2的基础上,对这个积分进一步改进.通过对比几种轫致辐射积分方案,结果显示,最终的方案性能上比版本2可以快约2～5倍.在积分的精确性上比版本1及版本2均改进了很多,在缺省的积分控制精度下也不再产生光子谱的尖刺现象.而且,积分耗时不再敏感于积分上限取值.由于积分性能的提高,使得利用精确的轫致辐射截面计算轫致积分成为可能.结果显示,用精确轫致辐射截面比先前的近似截面积分的结果光子流量略小(≤4%),积分时间大约比先前使用近似截面多30%.
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| 关 键 词： | 太阳 X射线 伽玛射线 太阳 耀斑 方法 数值 |
Fast Calculation of Integration of Bremsstrahlung Radiation from Electrons with Power-law Distribution |
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| LI You-ping,GAN Wei-qun.Fast Calculation of Integration of Bremsstrahlung Radiation from Electrons with Power-law Distribution[J].Acta Astronomica Sinica,2011,52(3). |
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| Authors: | LI You-ping GAN Wei-qun |
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| Institution: | LI You-ping GAN Wei-qun (Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210008) |
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| Abstract: | The integral numeration of the hard X-ray bremsstrahlung spectrum based on the version 2 in Solar SoftWare(SSW) is developed by us.By comparing the cost times of the integral numeration with four methods,it is showed that the best method is faster than version 2 by about 2 to 5 times.It also shows that in comparison with previous version 1 and 2,the accuracy,the suppression of the spike structure and insensitivity to the upper limit of the integration are improved a lot with the best method.In addition,we t... |
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| Keywords: | sun:X rays gamma rays sun:flares methods:numerical |
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