60 citations · 473 across the 33 of their papers we have counts for
14 papers · 1 filter
Data-driven synthesis of high-fidelity triaxial magnetic waveforms for quantum control
Giuseppe Bevilacqua, Valerio Biancalana, Roberto Cecchi
We present a system for generating arbitrary, triaxial magnetic waveforms with a spectral content spanning from DC to tens of kHz, a critical capability for quantum control and spi…
Tri-axial time-dependent magnetic field calibrated in-situ by harmonic analysis of adiabatically evolving atomic spins
Giuseppe Bevilacqua, Valerio Biancalana, Yordanka Dancheva +1
We introduce a methodology to calibrate in situ a set of coils generating bi- or tri-axial magnetic fields, at frequencies where a calibration performed under static conditions wou…
Electromagnetic Induction Imaging: Signal Detection Based on Tuned-Dressed Optical Magnetometry
Giuseppe Bevilacqua, Valerio Biancalana, Yordanka Dancheva +3
A recently introduced tuning-dressed scheme makes a Bell and Bloom magnetometer suited to detect weak variations of a radio-frequency (RF) magnetic field. We envisage the applicati…
Fast, cheap, and scalable magnetic tracker with an array of magnetoresistors
Valerio Biancalana, Roberto Cecchi, Piero Chessa +3
We present the hardware of a cheap multi-sensor magnetometric setup where a relatively large set of magnetic field components is measured in several positions by calibrated magneto…
Ferromagnetic contamination of Ultra-Low-Field-NMR sample containers. Quantification of the problem and possible solutions
Giuseppe Bevilacqua, Valerio Biancalana, Marco Consumi +4
The presence of a weak remanence in Ultra-Low-Field (ULF) NMR sample containers is investigated on the basis of proton precession. The high-sensitivity magnetometer used for the NM…
Fast switching coil system for sample premagnetization in an unshielded ultra-low-field Nuclear Magnetic Resonance experiment
Valerio Biancalana, Roberto Cecchi, Leonardo Stiaccini +1
We present a system developed to premagnetize liquid samples in an ultra-low-field Nuclear Magnetic Resonance (NMR) experiment. Liquid samples of a few milliliter are exposed to a…
Spurious Ferromagnetic Remanence Detected by Hybrid Magnetometer
Giuseppe Bevilacqua, Valerio Biancalana, Yordanka Dancheva +2
Nuclear magnetic resonance detection in ultra low field regime enables the measurement of different components of a spurious remanence in the polymeric material constituting the sa…
Self-adaptive loop for external disturbance reduction in differential measurement set-up
Giuseppe Bevilacqua, Valerio Biancalana, Yordanka Dancheva +1
We present a method developed to actively compensate common-mode magnetic disturbances on a multi-sensor device devoted to differential measurements. The system uses a field-progra…
A low noise modular current source for stable magnetic field control
Valerio Biancalana, Giuseppe Bevilacqua, Piero Chessa +3
A low cost, stable, programmable, unipolar current source is described. The circuit is designed in view of a modular arrangement, suitable for applications where several DC sources…
Multichannel optical atomic magnetometer operating in unshielded environment
Giuseppe Bevilacqua, Valerio Biancalana, Piero Chessa +1
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…
A fast pneumatic sample-shuttle with attenuated shocks
Valerio Biancalana, Yordanka Dancheva, Leonardo Stiaccini
We describe a home-built pneumatic shuttle suitable for the fast displacement of samples in the vicinity of a highly sensitive atomic magnetometer. The samples are magnetized at 1…
A room-temperature alternating current susceptometer - Data analysis, calibration, and test
M. Alderighi, G. Bevilacqua, V. Biancalana +3
An AC susceptometer operating in the range of 10 Hz to 100 kHz and at room temperature is designed, built, calibrated and used to characterize the magnetic behaviour of coated magn…
Long-term drift laser frequency stabilization using purely optical reference
A. Rossi, V. Biancalana. B. Mai, L. Tomassetti
We describe an apparatus for the stabilization of laser frequencies that prevents long term frequency drifts. A Fabry-Perot interferometer is thermostated by referencing it to a st…
Stray Magnetic Field Compensation with a Scalar Atomic Magnetometer
Jacopo Belfi, Giuseppe Bevilacqua, Valerio Biancalana +3
We describe a system for the compensation of time-dependent stray magnetic fields using a dual channel scalar magnetometer based on non-linear Faraday rotation in synchronously opt…