Focussing device which focuses the particles

 Focussing device which focuses the particles 

Used to estimate the masses of nuclei and relative abundahce of various isotopes, It plays an important role for: accurately estimáting masses of nuclei and atoms, binding energy, nuelear reactions, disintegration studjes and study of other important nuclear properties. The mass spectrometers generally.consist of the following essential components.

An ion source capable of emitting beams of positively charged atomic and molecular particles which äre johized. (ii) Collimatộr slits which limit the beam to a narrow width and accelérate these, (iif) An analyzer which consists of an electric field applied perpendicular to the path of the particle and is used as an energy filter and a magnetic field applied in the perpendicular plane which is used as a momentum filter.

 (iv) Focussing device which focuses the particles of the same mass travelling with a spread of velocities in different directions along the median plane of the beam. (v) Detector consist of a photographic plate which may carry the image of ions in a masSS spectrograph or an electrode connected to a sensitive electrometer which collects pulses of current produced by a number of ions falling on it pér unit. time. A numbèr of mass spectrographs .