Optional Detectors; Optional Detectors Connection; Trinity Detector T3 - Thermo Scientific Apreo User's Operation Manual

Optional Detectors

It is possible to extend the Apreo microscope system with some detectors, depending on user needs.

Optional detectors connection

Detectors are connected to the feed-through connector board.
Connectors have printed names and are used to connect the
following detectors (UI representation):
• GAD: Directional GAD (GAD–ABS / GAD–CBS)
• DBS: Directional BackScattered (ABS / CBS)
• STEM: Scanning Transmission Electron Microscopy 
(STEM 3 / STEM 3+)

C a u t i o n !
Connector insertion is a service operation!













Trinity Detector T3

Electrons generated by a primary beam can be collected by the
in-column Trinity detector T3 that is located inside the column,
just below the aperture strip. It is useful in the OptiPlan column
Use Case.
It is ideal for use together with the Beam Deceleration mode (BD)
and Standard Use case and with/without BD in the OptiPlan Use
case, when standard off-axis secondary electron (SE) detectors
fail.
In BD mode with stage bias above 2.5 kV, the detector detects SE; without BD the detector collects the BSE signal.
Optimum WD should be from 3.5 to 7 mm to achieve maximum detection efficiency. Due to geometrical restrictions,
higher probe currents and HV over 4 kV should be used.
7-4 User Manual
System Options: Optional Detectors
C O N F I D E N T I A L – limited rights
Feb 2018 Revision A