Full width at half maximum of the time distribution of the pulse of ions generated by a beam chopper and, optionally, the use of
beam bunching in
secondary ion mass spectrometry.
Note: The pulse width is usually measured using the
\(\ce{H+}\) ion. The velocity of
\(\ce{H+}\) ions, for a given
extraction field, is larger than that of other ions. The width in time of the
\(\ce{H+}\) pulse thus provides a more reliable value for the width of the extraction pulse.
Source:
PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1843 (https://doi.org/10.1515/pac-2019-0404)