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- H. Xia
- Princeton University Department of Physics, , Princeton, New Jersey 08544
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- A. Ben-Amar Baranga
- Princeton University Department of Physics, , Princeton, New Jersey 08544
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- D. Hoffman
- Princeton University Department of Physics, , Princeton, New Jersey 08544
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- M. V. Romalis
- Princeton University Department of Physics, , Princeton, New Jersey 08544
書誌事項
- 公開日
- 2006-11-20
- DOI
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- 10.1063/1.2392722
- 公開者
- AIP Publishing
この論文をさがす
説明
<jats:p>The authors demonstrate detection and mapping of brain magnetic fields evoked by auditory stimulation with a noncryogenic magnetometer based on spin precession of potassium atoms in spin-exchange-relaxation-free regime. Optical readout using a photodiode array allows flexibility in detector placement while using common elements for most components of the multichannel system. Absence of a cryogenic dewar eliminates magnetic Johnson noise from radiation shields and allows the use of a compact magnetic shield with a high shielding factor. The magnetometer sensitivity is currently equal to 3.5fT∕Hz1∕2 at 10Hz, similar to superconducting quantum interference device magnetoencephalography systems.</jats:p>
収録刊行物
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- Applied Physics Letters
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Applied Physics Letters 89 (21), 211104-, 2006-11-20
AIP Publishing
