Tunable atomic magnetometer for detection of radio-frequency magnetic fields
Tunable atomic magnetometer for detection of radio-frequency magnetic fields
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DOI：
10.1103/physrevlett.95.063004
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发表时间：
2005-08-05
影响因子：
8.6
通讯作者：
Sauer, KL
中科院分区：
文献类型：
--
作者：
Savukov, IM;Seltzer, SJ;Sauer, KL
我们描述了一种碱金属磁力计，用于检测射频范围内的弱磁场。通过将碱金属原子的塞曼共振调谐到RF频率并部分抑制碱金属蒸气中的自旋交换碰撞来实现高灵敏度。我们证明磁场灵敏度为2 fT/Hz（1/2），频率为99 kHz，共振宽度为400 Hz。我们还导出了一个简单的解析表达式的基本限制的灵敏度的射频磁强计和表明，约0.01 fT/Hz（1/2）的灵敏度可以实现在一个实际的系统与测量体积为200 cm（3）。
We describe an alkali-metal magnetometer for detection of weak magnetic fields in the radio-frequency (rf) range. High sensitivity is achieved by tuning the Zeeman resonance of alkali atoms to the rf frequency and partially suppressing spin-exchange collisions in the alkali-metal vapor. We demonstrate magnetic field sensitivity of 2 fT/Hz(1/2) at a frequency of 99 kHz with a resonance width of 400 Hz. We also derive a simple analytic expression for the fundamental limit on the sensitivity of the rf magnetometer and show that a sensitivity of about 0.01 fT/Hz(1/2) can be achieved in a practical system with a measurement volume of 200 cm(3).