2011 Fiscal Year Final Research Report
SQUID pico-voltmeter for highly sensitive measurement system
| Project/Area Number |
22656093
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Measurement engineering
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| Research Institution | Kyushu University |
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Principal Investigator |
ENPUKU Keiji 九州大学, 超伝導システム科学研究センター, 教授 (20150493)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHISA Takashi 九州大学, システム情報科学研究院, 助教 (30380588)
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| Project Period (FY) |
2010 – 2011
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| Keywords | SQUID / 高温超伝導 / ピコボルトメータ / 磁気センサ / 冷却銅検出コイル / リッツ線 / センサシステム |
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| Research Abstract |
We have developed a SQUID pico-voltmeter for highly sensitive measurement system. Using a low noise high-Tc SQUID sensor and tight coupling circuit for the transfer of the signal voltage, we demonstrated the voltage noise of about 10 pV/Hz^<1/2>. We also developed a magnetic sensor system using the SQUID pico-voltmeter coupled to a pickup coil cooled at 77 K. The sensor showed the field noise of 1 fT/Hz^<1/2> for the frequency f> 20 kHz.
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