Caltech Noble Gas Lab: MAP 215-50

MAP 215-50

The MAP 215-50 is a 90° magnetic sector mass spectrometer with a 15 cm radius of curvature. It is equipped with a single Faraday cup an an ion-counting electron multiplier with an ESA. This instrument has long been a workhorse for helium isotope measurements and other noble gas measurements. We use it in conjunction with a double vacuum resistance furnace, a series of diffusion cells, and a number of other extraction devices as the need arises.