[22p-A601-1~17] CS.9 Code-sharing Session of 6.2 & KS

3:45 PM - 4:00 PM JST(6:45 AM - 7:00 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[22p-A601-11] Developing a sensitive diamond quantum sensor system for detecting the brain magnetic field of a living rat

〇(M1)Atsumi Yoshimura¹, Naota Sekiguchi¹, Motofumi Fushimi², Atsuhiro Kitada¹, Chikara Shinei³, Masashi Miyakawa³, Takashi Taniguchi³, Tokuyuki Teraji³, Shinobu Onoda⁴, Takeshi Ohshima⁴, Masaki Sekino², Takayuki Iwasaki¹, Mutsuko Hatano¹ (1.Tokyo Tech., 2.Univ. of Tokyo, 3.NIMS, 4.QST)

Keywords:

NV center,quantum sensor,magnetoencephalography

Diamond quantum sensors have been actively studied for applications in biomagnetic field measurements such as brain magnetic fields. We developed a non-invasive diamond quantum sensor that can be placed close to the head of a living rat. We reduced the laser intensity noise by balance detection and obtained magnetic field sensitivity better than 30 pT Hz^-1/2 in the bandwidth of the brain magnetic field of a rat. If a brain magnetic field is 10 pT, this sensor is expected to detect it within about 1 minute of interrogation.