Applications of a superconducting magnet on high performance Fourier transform mass spectrometers

Ultra-high mass resolution; easy mass calibration routines; accurate mass measurement; wide mass range; high sensitivity; and the ability to rapidly perform experiments and to rapidly change experiments are the special features that make a Fourier transform mass spectrometer (FTMS) highly productive as an analytical mass spectrometer. An FTMS requires a relatively high magnetic field, a large homogenous volume and long term field stability; the requirements only a superconducting magnet can fulfill. We have designed a superconducting magnet to provide the required magnetic environment for our FTMS system. The central field of the magnet is 3T. The 100 ppm homogeneity volume is 5 cm × 5 cm × 10 cm. The Iield stability is 1 ppb/hr. The integrated cryostat design allows the whole system to be installed and operational within thirty-six hours in the field. The reproducibility of the magnet has been perfect.