Metallic contaminant detection system using multi-channel high Tc SQUIDs

Tanaka, Saburo; Kitamura, Yoshihiro; Hatsukade, Yoshimi; Ohtani, Takeyoshi; Suzuki, Shuichi

doi:10.1016/j.jmmm.2012.02.072

Cited by 16 publications

(5 citation statements)

References 11 publications

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“…A superconducting quantum interference device (SQUID) magnetometer is based on the principle of Josephson effect proposed by the great scientist B. D. Josephson in 1962(McElfresh, 1994Macintyre, 1999;Fagaly, 2006;Johnson et al, 2012;Tanaka et al, 2012). He observed that a superconducting current could flow when two superconductors (e.g.…”

Section: Superconducting Quantum Interference Device Magnetometermentioning

confidence: 99%

“…Used TEM to study microstructure and morphology of materials. Fagaly (2006), Johnson et al (2012), Tanaka et al (2012) Superconducting Quantum Interference Device (SQUID) Magnetometer Utilized SQUID magnetometer to measure magnetic properties of materials. https://en.wikipedia.org/wiki/X-Ray_absorption_spectroscopy X-ray Absorption Spectroscopy (XAS)…”

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 99%

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Experimental Techniques for the Characterization of Magnetic Thin Films

Singh,

Kumar

2024

Prabha Materials Science Letters

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This review article describes the various experimental techniques, which are required for the characterization of magnetic thin films. Characterization is an essential process to understand the properties of magnetic thin films. By knowing the properties of these materials, one can utilize them in various technological applications as per requirements. There are different characterization tools to study the different properties of nanostructured materials. Some important experimental techniques employed to characterize the magnetic thin films are: X-Ray Diffraction, X-Ray reflectivity, Field emission scanning electron microscopy, Energy dispersive spectrometer, Transmission electron microscopy, Superconducting quantum interference device, Raman spectroscopy and X-ray absorption spectroscopy etc. These techniques will develop a better understanding of the structural, morphological, and magnetic properties of the materials to the scientific community. The discussion made in the present review article would be extremely helpful to the researchers who are doing research in the various branches of science and engineering.

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Section: Superconducting Quantum Interference Device Magnetometermentioning

confidence: 99%

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 99%

Experimental Techniques for the Characterization of Magnetic Thin Films

Singh,

Kumar

2024

Prabha Materials Science Letters

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“…This simulation model has been reported previously [6]. Calculations of the contaminant signal frequencies were performed for conditions in which the standard conveyor velocity of the system was 333 mm/s and the height at which samples could pass through the system was the stand-off distance of 17-120 mm (with a food product height of 103 mm).…”

Section: Considerations For Filtersmentioning

confidence: 99%

Development of Contaminant Detection System using HTS SQUIDs

Ohtani¹,

Tanaka²,

Narita³

et al. 2015

Progress in Superconductivity and Cryogenics

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In terms of food safety,mixture of contaminants in food is a serious problem for not only consumers but also manufacturers. In general, the target size of the metallic contaminant to be removed is 0.5 mm. However, it is a difficult task for manufacturers to achieve this target, because of lower system sensitivity. Therefore, we developed a food contaminant detection system based on high-Tc RF superconducting quantum interference devices (SQUIDs), which are highly sensitive magnetic sensors. This study aims to improve the signal to noise ratio (SNR) of the system and detect a 0.5 mm diameter steel ball. Using a real time digital signal processing technique along with analog band-pass filters, we improved the SNR of the system. Owing to the improved SNR, a steel ball with a diameter as small as 0.3 mm, with stand-off distance of 117 mm was successfully detected. These results suggest that the proposed system is a promising candidate for the detection of metallic contaminants in food products.

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“…We previously proposed a direct detection system using multi-channel SQUIDs. In that system, an object with a contaminant is magnetized by a permanent magnet, and then the remanent field of the contaminant is detected by a SQUID [1][2][3][4][5]. Because the detection width is defined by the size of the SQUID, eight-channel SQUIDs are required to inspect a specimen with a width of 65 mm, for example.…”

Section: Introductionmentioning

confidence: 99%

Metallic Contaminant Detection System Using Multi-Channel Superconducting Quantum Interference Device (SQUID)

Tanaka

Ohtani

Uchida

et al. 2014

SSP

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Metallic particles with outer dimensions smaller than 100 microns in Li-ion battery cannot be detected using a conventional X-ray imaging system. We propose two systems using high Tc SQUIDs: One is a direct detection type and the other is an indirect type. In the direct detection system, an object with a contaminant is magnetized by a permanent magnet and then the remanent field of the contaminant is detected by SQUID. In the indirect detection system, the principle is based on Faradays law of electromagnetic induction. The diameter of the detection coil is 2 to 3 times larger than the SQUID; as a result, less number of SQUIDs, two or three is enough to inspect a specimen with a width of 65 mm. This method is applicable for an inspection of metallic contaminants in non-magnetic film such as a separator for Li-ion battery. We discuss the results of the evaluation of the new system as compared with a direct detection system.

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Metallic contaminant detection system using multi-channel high Tc SQUIDs

Cited by 16 publications

References 11 publications

Experimental Techniques for the Characterization of Magnetic Thin Films

Experimental Techniques for the Characterization of Magnetic Thin Films

Development of Contaminant Detection System using HTS SQUIDs

Metallic Contaminant Detection System Using Multi-Channel Superconducting Quantum Interference Device (SQUID)

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