An atomic magnetometer for brain activity imaging

Andrei Ben Amar Baranga, Dan Hoffman, Hui Xia, Michael V. Romalis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations


Magneto-encephalography (MEG) is extensively used for studies of brain functioning. We present a new multi-channel atomic magnetometer for MEG. The 256-channel magnetometer uses high-density K atoms and operates in a very low magnetic field produced by a human-size magnetic shielding. A cubic glass cell of 7 cm on the side located about 2 cm away from a human head contains a drop of K, N2 and 4He. Alkali-metal vapor is produced by warming the cell with hot air. Two 10 W lasers mounted outside the shields, optically pump and probe the vapor. A 16×16 photodiode array monitors the signals. Experimental results will be reported.

Original languageEnglish (US)
Title of host publication2005 14TH IEEE-NPSS Real Time Conference
Number of pages2
StatePublished - Dec 1 2005
Event2005 14TH IEEE-NPSS Real Time Conference - Stockholm, Sweden
Duration: Jun 4 2005Jun 10 2005

Publication series

Name2005 14TH IEEE-NPSS Real Time Conference


Other2005 14TH IEEE-NPSS Real Time Conference

All Science Journal Classification (ASJC) codes

  • Engineering(all)


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