Speaker
Dr
alexander mtchedlishvili
(Dr)
Description
The precise measurement and control of magnetic fields and magnetic
field fluctuations is an important step for experiments searching for
a permanent electric dipole moment (EDM) of the neutron, and is one of
the main factors limiting the accuracy. In a project approved by
Paul Scherrer Institute (PSI), a neutron EDM spectrometer is proposed.
For this experiment, together with Fribourg university, we have build arrays of Cs detectors and FPGA-DSP based electronics, with phase-locked schema to get
stable operation of the Cs sensors.
Electronic module includes 16 channels, with independent phase locked feedback
and digital frequency syntheses. Internal DSP helps to find a resonance frequency
in quite big range of the magnetic field and has a enough speed to follow the changes of
the magnetic field. DSP includes also different subroutines for data reprocessing,
which could be updated trough internet communication.
First noise measurements shows quite promising results(below 300fT RMS) and electronic module is specifically good to find and lock narrow resonance lines.
Primary author
Dr
alexander mtchedlishvili
(Dr)
