UHF SQUID-magnetometer at 77 K

✍ Scribed by Valery P Timofeev; Sergej S Khvostov; Georgy M Tsoi; Vladimir I Shnyrkov

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 241 KB
• Volume: 32
• Category: Article
• ISSN: 0011-2275
• DOI: 10.1016/0011-2275(92)90219-z

✦ Synopsis

Using

an interferometer made of the bulk YBaCuO ceramics a SQUID-based magnetometer has been designed. Magnetic flux sensitivity of the n{troge~ooled UHF SQUID pumped at 390 MHz is found to be 5-10-U~o/HZ ±/~ in the quasiwhite noise region.

The energy sensitivity of the SQUID is about 2.6"10 -29 J/Hz which is by an order of magnitude higher than that of available HTS commercial SQUIDs. The receiving area of the quantization loop is 0.8mm in l~iamet~2 resulting in the field sensitivity as high as 6-10-T/Hz / . On the basis of the device constructed, it is expected to design SQUID-magnetometers for nondestructive control, geophysical and biomagnetic researches.