  The Electromagnetic Mass Analyser (EMMA) is a new vacuum-mode recoil mass
spectrometer currently undergoing the final stages of commissioning at the
ISAC-II facility of TRIUMF. EMMA employs a symmetric configuration of
electrostatic and magnetic deflectors to separate the products of nuclear
reactions from the beam, focus them in both energy and angle, and disperse them
in a focal plane according to their mass/charge (m/q) ratios. The spectrometer
was designed to accommodate the gamma-ray detector array TIGRESS around the
target position in order to provide spectroscopic information from
electromagnetic transitions. EMMA is intended to be used in the measurement of
fusion evaporation, radiative capture, and transfer reactions for the study of
nuclear structure and astrophysics. Its complement of focal plane detectors
facilitates the identification of recoiling nuclei and subsequent recoil decay
spectroscopy. Here we describe the facility and report on commissioning
efforts.
