共查询到16条相似文献,搜索用时 78 毫秒
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本文利用我们曾提出的粒子-晶体相互作用势(正弦平方势)讨论了带电粒子在形变超晶格中的运动行为,导出了共振退道时的退道系数,指出了用沟道技术研究形变超晶格的灵敏性、可靠性和重要性。 相似文献
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引入新的相互作用势——正弦平方势,并从运动方程的旋转周期解出发,解析地处理了带电粒子的准沟道辐射。讨论了这种辐射与沟道辐射的区别,计算了它对总辐射强度的贡献。 相似文献
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在经典力学框架内和偶极近似下,引入正弦平方势讨论了系统非线性对摆动场辐射的影响。首先,把粒子在弯晶中的运动方程化为具有周期外力作用的摆方程,用Jacobian椭圆函数和椭圆积分解析地描述了粒子运动行为;用多尺度度法和三角函数的广义Bessel展开,找到了受迫摆方程的近似解。而后,在超相对论情况下讨论了系统的瞬时辐射强度和平均辐射强度,并对两种辐射的强度比进行了讨论。结果表明,摆动场辐射强度与摆动场振幅平方成正比,振幅越大摆动场辐射强度越强。 相似文献
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引入正弦平方势,在经典力学框架内,把粒子的运动方程化为标准的摆方程.用Jacobian椭圆函数和椭圆积分解析地给出了系统的解和粒子运动周期,并从方程的旋转周期解出发讨论了带电粒子的准沟道辐射.将准沟道辐射和沟道辐射进行了比较,发现二者的主要差别在于准沟道粒子的横向速度的平均值不为零,而它的辐射能量在k~c=0.5时,比沟道辐射大2.4倍.Abstract: In the frame of the classical mechanics the motion equation of particles is reduced to the pendulum equation by using the sine-squared potential. The solution of the equation and the period of the particle motion are expressed exactly by means of Jacobian elliptic function and the elliptic integral. The quasi-channeling radiation of the charged particles is discussed based on the rotational periodic solution. From the comparison between quasi-channeling radiation and channeling radiation, it is found that their main difference is that the average transverse velocity of the quasi-channeling particles is not zero,and its radiation energy is 2.4 times more than that of the channeling radiation if k~c =0.5. 相似文献
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正电子面沟道辐射的经典描述 总被引:3,自引:0,他引:3
本文利用经典方法,将粒子运动方程化为二阶非线性常微分方程,并用Jacobian椭圆函数和椭圆积分,解析地得到了方程的解和粒子振动周期;讨论了沟道辐射的一些主要特征,计算了正电子的最大辐射能量和谱分布,并同实验进行了比较,发现二者基本一致。 相似文献
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本文从量子力学出发,讨论了面沟道辐射的一般论证.在非简谐近似下,描写了正电子面沟道辐射的频谱辐射.同实验比较表明,二者基本符合. 相似文献
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A. I. Chumakov 《Russian Microelectronics》2011,40(3):149-155
The estimations of equivalent values for linear energy transfer of heavy charged particles based on the results of experimental
investigations of sensitivity of LSICs to local radiation effects with the use of the procedure of local laser irradiation
are presented. The possibility of recalculation of the energy of laser radiation into equivalent values of linear energy transfer
with the use of the measurements of the ionization reaction in the supply circuit of LSIC is substantiated. Uncertainties
caused by the characteristics of the interaction of optical radiation with semiconductor structures are eliminated in the
suggested procedure. 相似文献
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G. P. Zhigal’skii S. A. Kostryukov V. G. Litvinov M. S. Rodin T. A. Kholomina 《Journal of Communications Technology and Electronics》2007,52(10):1165-1170
The parameters of deep centers in the barrier structures based on intrinsic gallium arsenide that are used in the detectors of charged particles and X-ray radiation are studied via the methods of the deep-level transient spectroscopy (DLTS) and the low-frequency-noise spectroscopy. Two deep levels (DLs) with different layer concentrations are revealed in the samples under study. It is demonstrated that a high-temperature DL with relatively high ionization energy determines the spectral power density of the excess noise and reverse currents of an Al/i-GaAs detector. In addition, it is demonstrated that the DL ionization energies determined with the use of the DLTS and the low-frequency-noise spectroscopy methods are identical. 相似文献
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O. A. Semenova A. M. Efremov S. M. Barinov A. A. Kuchumov V. I. Svetsov 《Russian Microelectronics》2013,42(5):301-308
The steady-state parameters and the composition of the dc glow discharge plasma (p = 40–200 Pa, i = 30–70 mA) in methane are investigated by the probe diagnostics and mathematical modeling when solving the Boltzmann kinetic equation. The data on the reduced electric field strength, the electron energy distributions, the rate constants of the processes during the electron impact, the concentrations of charged particles, and the densities of their fluxes on the surface, which restrict the plasma region, are obtained. It is established that the associative electron detachment from the negative ion H? + R → H-R + e (where R = H, CH3, CH2, CH ...) substantially affects the balance of the charged particles in the plasma. 相似文献
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The general problem of optimizing the design of planar electromagnetic pulse radiators is discussed. It is shown that bounds on the performance of such radiators can be determined by formulating field quantifies as inner products and solving a variational problem. Results of a simple example are given where the bound on the peak electric field is round for a finite-sized radiator having a current distribution which is frequency band-limited. The bound on the peak electric field component along an arbitrary orientation of direction in the radiator's far field is also presented. These results provide insight into the synthesis of electromagnetic pulse radiators, but further work is necessary if the technique discussed here is to lead to the design of improved electromagnetic pulse antennas. 相似文献