Results 51 to 60 of about 25,141 (249)

Detection of NMR signals with a radio-frequency atomic magnetometer

, 2006
We demonstrate detection of proton NMR signals with a radio frequency atomic magnetometer tuned to the NMR frequency of 62 kHz. High-frequency operation of the atomic magnetometer makes it relatively insensitive to ambient magnetic field noise. We obtain
Appelt, Bhaskar, Bloom, Butterworth, Cohen-Tannoudji, Cross, Farr, Grandi, Greenberg, Hoult, I.M. Savukov, Kominis, Lee, M.V. Romalis, Meriles, Mössle, Newbury, Robinson, S.J. Seltzer, Savukov, Savukov, Saxena, Schwindt, Seltzer, Seton, Seton, Suits, Tseng, Varpula, Xu, Yashchuk   +30 more
core   +1 more source

Quantum limit of optical magnetometry in the presence of ac-Stark shifts [PDF]

, 2000
We analyze systematic (classical) and fundamental (quantum) limitations of the sensitivity of optical magnetometers resulting from ac-Stark shifts. We show that in contrast to absorption-based techniques, the signal reduction associated with classical ...
Fleischhauer, M., Matsko, A. B., Scully, M. O.   +2 more
core   +3 more sources

Suppression of thermal coupling noise in the SERF atomic co-magnetometer

Results in Physics, 2023
Heating the alkali metal vapor cell to obtain high atomic density is a prerequisite for realizing the high-precision measurement for spin-exchange relaxation-free (SERF) co-magnetometer.
Jiasen Ruan, Lihong Duan, Yang Fu, Lv Yang, Wenfeng Fan, Xinxiu Zhou, Wei Quan   +6 more
doaj   +1 more source

Multichannel optical atomic magnetometer operating in unshielded environment

, 2016
A multi-channel atomic magnetometer operating in an unshielded environment is described and characterised. The magnetometer is based on D1 optical pumping and D2 polarimetry of Cs vapour contained in gas-buffered cells.
Bevilacqua, Giuseppe, Biancalana, Valerio, Chessa, Piero, Dancheva, Yordanka   +3 more
core   +1 more source

A τ−1 measurement across three orders of magnitude based on an atomic spin precession magnetometer in self-sustaining mode

AIP Advances, 2019
The absolute measurement of magnetic fields can be realized by monitoring the Larmor precession of atomic spins. Yet, this spin-precession magnetometer can only be put into use in weak magnetic fields and the sensitivity is limited by the coherence time ...
Q. Zhao, B. L. Fan, S. G. Wang, L. J. Wang   +3 more
doaj   +1 more source

Search for plant biomagnetism with a sensitive atomic magnetometer [PDF]

, 2011
We report what we believe is the first experimental limit placed on plant biomagnetism. Measurements with a sensitive atomic magnetometer were performed on the Titan arum (Amorphophallus titanum) inflorescence, known for its fast bio-chemical processes ...
Bown D., Brian Lester, Brian Patton, Dmitry Budker, Eric Corsini, James Higbie, Mark Prouty, Nicolas Baddour, Paul Licht, Ripka P., Victor Acosta   +10 more
core   +3 more sources

Efficient Process Development for Laser Powder Bed Fusion of a Soft‐Magnetic Metallic Glass Composite

Advanced Engineering Materials, EarlyView.
Iron‐based metallic glass alloys exhibit excellent soft‐magnetic properties, and unprecedented geometrical freedom in the design of soft‐magnetic metallic glass components is made possible by additive manufacturing. An efficient workflow for developing parameters for laser‐based powder bed fusion of a Fe‐based metallic glass alloy is presented along ...
Julia Löfstrand, Priyanka Saha, Vidhiaza Leviandhika, Urban Wiklund, Alexander Elsen, Carolin Zintel, Lena Thorsson, Petra E. Jönsson   +7 more
wiley   +1 more source

Measurement of longitudinal nuclear spin relaxation time in NMR gyroscope by real-time monitoring

AIP Advances, 2022
In the atomic cell of a nuclear magnetic resonance gyroscope, a transverse bias field is applied to enable the in situ alkali magnetometer to sense the variations in the longitudinal magnetic field.
Yang Zhang, Jintao Zheng, Zaiyang Yu, Zhiqiang Xiong, Zhiguo Wang, Hui Luo   +5 more
doaj   +1 more source

Sustainable Synthesis of Bio‐Based Magnetic and Conductive Wood for Electromagnetic Interference Shielding Applications

Advanced Engineering Materials, EarlyView.
A wood‐based magnetic and conductive material called Magwood (MW), capable of blocking almost 99.99% of electromagnetic waves (in the X‐band frequency range), is synthesized using a simple, solvent‐free process. MW is lightweight, resists water, and is flame‐retardant, making it a promising alternative for shielding electronics. The rapid proliferation
Akash Madhav Gondaliya, Majed Amini, Mohammad Arjmand, Earl Johan Foster   +3 more
wiley   +1 more source

High Bandwidth Atomic Magnetometery with Continuous Quantum Non-demolition Measurements

, 2010
We describe an experimental study of spin-projection noise in a high sensitivity alkali-metal magnetometer. We demonstrate a four-fold improvement in the measurement bandwidth of the magnetometer using continuous quantum non-demolition (QND) measurements.
E. B. Aleksandrov, G. Bison, G. Vasilakis, M. V. Romalis, S. Xu, V. Shah   +5 more
core   +1 more source