Scanning+Electron+Microscopy

Its fundamental performance is similar to that of the larger SEM's, however, compact design, operational ease and simplicity of installation place it in a category by itself. It functions on the following principle - An electron beam emitted from the electron gun is accelerated by a voltage of 10,000 volts, focused by a three-stage electro-magnetic lens system and scanned over the specimen surface in synchronization with the TV monitor raster; the secondary electrons emitted from the surface of the specimen are collected by the secondary electron detector (scintillator-photomuliplier) and converted to an electrical signal to obtain the video information displayed on the TV monitor.
 * Moblie Mini SEM**


 * __Initial start-up procedure__**
 * Before placing the instrument in operating condition, check the controls and switches as they should be at.
 * Main Unit : Column, Display Console, TV Monitor
 * Column : Vacuum Control Knob
 * [[image:DSC00415.JPG width="257" height="197" align="left"]][[image:DSC00414.JPG width="242" height="196" caption="Place in position1"]]
 * Display Console
 * [[image:DSC00412.JPG width="211" height="161"]][[image:DSC00413.JPG width="208" height="162"]]
 * TV Monitor
 * [[image:DSC00410.JPG width="255" height="179"]][[image:DSC00411.JPG width="334" height="252"]]
 * TV Monitor
 * [[image:DSC00410.JPG width="255" height="179"]][[image:DSC00411.JPG width="334" height="252"]]