Open AccessA linear magnetic field scan driver
Author(s) -
Quine Richard W.,
Czechowski Tomasz,
Eaton Gareth R.
Publication year - 2009
Publication title -
concepts in magnetic resonance part b: magnetic resonance engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.286
H-Index - 32
eISSN - 1552-504X
pISSN - 1552-5031
DOI - 10.1002/cmr.b.20128
Subject(s) - waveform , amplitude , arbitrary waveform generator , signal generator , acoustics , generator (circuit theory) , signal (programming language) , field (mathematics) , amplifier , computer science , range (aeronautics) , magnetic field , sweep frequency response analysis , electrical engineering , power (physics) , physics , electronic engineering , optics , voltage , engineering , telecommunications , mathematics , bandwidth (computing) , quantum mechanics , aerospace engineering , pure mathematics , programming language
A linear magnetic field scan driver was developed to provide a rapidly scanning magnetic field for use in electron paramagnetic resonance (EPR) spectroscopy. The driver consists of two parts: a digitally synthesized ramp waveform generator and a power amplifier to drive the magnetic field coils. Additionally, the driver provides a trigger signal to a data collection digitizer that is synchronized to the ramp waveform. The driver can also drive an arbitrary current waveform supplied from an external source. The waveform generator is computer controlled through a serial data interface. Additional functions are controlled by the user from the driver front panel. The frequency and amplitude of the waveform are each separately controlled with 12‐bit resolution (one part in 4,096). Several versions of the driver have been built with different frequency and amplitude ranges. Frequencies range from 500 to 20,000 Hz. Field sweep amplitudes range up to 80 G pp . This article also gives a brief description of the field coils that are driven by the driver. © 2009 Wiley Periodicals, Inc. Concepts Magn Reson Part B (Magn Reson Engineering) 35B: 44–58, 2009