| Presentation | 2011-01-24 Performance of Magnetometer Utilizing Resonance type Pickup Coil and SQUID Shintaro Hirakawa, Ryuji Momotomi, Masaaki Matsuo, Keiji Enpuku, Akihiko Kandori, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We have designed and tested an HTS SQUID magnetometer using resonant coupling of copper pickup coil cooled at T=77 K. The pickup coil was made of a Litz wire, so as to prevent the increase of the coil resistance at high frequencies. First, we measured the coil characteristics from dc to 100 kHz when the diameter d_f of the elementary filament of the Litz wire was changed between 0.04 and 0.2 mm. We showed that the coil characteristics at high frequencies can be improved by using a small diameter d_f. Next, we constructed a magnetometer using a pickup coil with average diameter D=45 mm and number of turns N=150. The measure magnetic field noise of the magnetometer was 3.3 fT/Hz^<1/2> at the resonant frequency of f=10.15 kHz. The Q value of the resonant circuit was Q=153. The experimental results agreed reasonably well with the designed value. The obtained high sensitivity of the magnetometer will be useful for the application to low field NMR. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | high T_c SQUID / cooled pickup coil / magnetometer / Litz wire / low field NMR |
| Paper # | SCE2010-45 |
| Date of Issue |
| Conference Information | |
| Committee | SCE |
|---|---|
| Conference Date | 2011/1/17(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Superconductive Electronics (SCE) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Performance of Magnetometer Utilizing Resonance type Pickup Coil and SQUID |
| Sub Title (in English) | |
| Keyword(1) | high T_c SQUID |
| Keyword(2) | cooled pickup coil |
| Keyword(3) | magnetometer |
| Keyword(4) | Litz wire |
| Keyword(5) | low field NMR |
| 1st Author's Name | Shintaro Hirakawa |
| 1st Author's Affiliation | Graduate School of Information Science and Electrical Engineering, Kyushu University() |
| 2nd Author's Name | Ryuji Momotomi |
| 2nd Author's Affiliation | Graduate School of Information Science and Electrical Engineering, Kyushu University |
| 3rd Author's Name | Masaaki Matsuo |
| 3rd Author's Affiliation | Research Institute of Superconductor Science and Systems, Kyushu University |
| 4th Author's Name | Keiji Enpuku |
| 4th Author's Affiliation | Graduate School of Information Science and Electrical Engineering, Kyushu University:Research Institute of Superconductor Science and Systems, Kyushu University |
| 5th Author's Name | Akihiko Kandori |
| 5th Author's Affiliation | Advanced Research Lab. Hitachi |
| Date | 2011-01-24 |
| Paper # | SCE2010-45 |
| Volume (vol) | vol.110 |
| Number (no) | 385 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |