工具系列————常用物理量的原子单位与国际单位的转换关系

灰太狼 2022-10-14 01:00 223阅读 0赞

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2ppYW5neWlfMTYxMjEwMV8wMw_size_16_color_FFFFFF_t_70][常用物理量原子单位与国际单位的转换关系.pdf][.pdf]

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## 原子单位换算 ##

1.  **激光强度与激光频率**

import numpy as np
    import scipy.constants as consts
    
    # pi : 圆周率
    pi = consts.pi
    
    # pc : 光速
    pc = consts.c
    
    # ! 原子时间单位
    au2hz = consts.physical_constants['atomic unit of time'][0]
    
    # epsilon_0 : 真空介电常数
    epsilon_0 = consts.epsilon_0
    
    # au2m : 原子长度单位
    au2m = consts.physical_constants['atomic unit of length'][0]
    
    # au2co: 原子电荷单位
    au2co = consts.e
    
    # au2j : 原子能量单位
    au2j = consts.physical_constants['atomic unit of energy'][0]
    
    
    # 波长
    wave_length = 1500.0
    # 波长转频率
    omega = pc / (wave_length * 1.0e-9) * au2hz * 2 * pi
    print('wave length : {} nm  \t  frequency :{} a.u.'.format(wave_length, round(omega, 5)), end='  \t  ')
    # 单个周期
    tau = 2 * pi / omega
    print('one-cycle duration : {} a.u.'.format(round(tau, 3)))
    
    # 激光强度
    laser_intensity = 2.0 * 1e14
    max_electric_field = np.sqrt(2.0 * laser_intensity * 1e4 / (epsilon_0 * pc)) * au2m * au2co / au2j
    print('laser intensity: {} × 10^14 W/cm-2'.format(laser_intensity/1e14), end='  \t  ')
    print('max electric field: {} a.u.'.format(round(max_electric_field, 5)))

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