NDLI: Active magnetic field compensation system using proton precession scalar magnetometer for SQUID based applications

Content Provider	IEEE Xplore Digital Library
Author	Mazaheri, J. Kamrani, H. Sareshtedari, F. Fardmanesh, M.
Copyright Year	2015
Description	Author affiliation: Superconductive Electron. Res. Lab., Sharif Univ. of Technol., Tehran, Iran (Mazaheri, J.; Kamrani, H.; Sareshtedari, F.; Fardmanesh, M.)
Abstract	A sensitive proton precession scalar magnetometer has been implemented and used for the active compensation of magnetic fields. For establishing a silent environment for SQUID applications, two approaches might be considered, which consist of passive and active magnetic shielding [1]. Each of these two approaches has its own benefits. In active shielding approach, using vector sensors for the active shielding or calibration systems, has a main complication in precise alignment of the sensor and the coils. This is due to the fact that, the sensitivities and offsets of individual sensors, their mutual angular deviations, and the misalignment between the coil and the sensor reference system have to be exactly considered [2]. Because of these complications, scalar magnetometers have an advantage of more accuracy than vector magnetometers in calibration of active shielding. In scalar active compensation system, shielding is based on elimination (compensation) of external magnetic field by applying proper currents through different coils of the system. In this work a magnetic compensation system has been made based on proton precession magnetometer. Proton Precession scalar magnetometer is used for external magnetic field measurement and based on the measured signal, other processing and amplification circuits apply the compensation currents into the coils of the system [3]. The readout circuits of the sensor which is based on measuring of the precession frequency of Hydrogen atoms around the external magnetic field, has been designed with especial noise consideration for increasing SNR for maximum sensitivity. This system is to be used for different SQUID applications which require a very silent magnetic environment. It should be noted that the mentioned system could be also used for the calibration of the coil systems for vector magnetometer calibration.
Starting Page	1378
Ending Page	1380
File Size	421855
Page Count	3
File Format	PDF
e-ISBN	9781479919727
DOI	10.1109/IranianCEE.2015.7146433
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-05-10
Publisher Place	Iran
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Decision support systems Electrical engineering Conferences Magnetic compensation Magnetic field calibration Proton precession Nuclear magnetic resonance
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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