Novel HTS DC squid solutions for NMR applications
Artikel i vetenskaplig tidskrift, 2014

We have developed a multilayer flux-transformer-based high-TC SQUID (flip-chip) magnetometer that improves signal-to-noise-ratios (SNR) in ultra-low field magnetic resonance (ulf-MR) recordings of protons in water. Direct ulf-MR-based benchmarking of the flip-chip versus a standard planar high-T C SQUID magnetometer resulted in improvement of the SNR by a factor of 2. This gain is attributable to the improved transformation coefficient (1.9 vs 5.3 nT/Φ0) that increased the signal available to the flip-chip sensor and to the lower noise at the measurement frequency (15 vs 25 fT/Hz1/2 at 4 kHz). The improved SNR can lead to better spectroscopic resolution, lower imaging times, and higher resolution in ulf-MR imaging systems based on high-T C SQUID technology. The experimental details of the sensors, calibration, and ulf-MR benchmarking are presented in this report.

Författare

Maxim Chukharkin Leonidovich

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Alexei Kalaboukhov

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Justin Schneiderman

Göteborgs universitet

Fredrik Öisjöen

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Magnus J Jönsson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Minshu Xie

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

O. V. Snigirev

Lomonosov Moscow State University

Dag Winkler

Chalmers, Mikroteknologi och nanovetenskap (MC2)

NATO Science for Peace and Security Series B: Physics and Biophysics

1874-6500 (ISSN)

Vol. 2014 151-159

Ämneskategorier

Fysik

DOI

10.1007/978-94-007-7265-6_13

ISBN

9789400772649