Zeiss GeminiSEM Series Instruction Manual

Also see for GeminiSEM Series: Instruction manual

ZEISS 5 Commissioning and First Operating Steps | 5.7 Finding Appropriate Detector SettingsThe following settings are recommended for the SE detector:EHT Typical WD Collector Voltage500 V – 5 kV 2–8 mm § Adjustable from −250 V to +400 V§ Standard applications: +300 VAt a high magnification, you can opti-mize the image by varying the collectorvoltage.§ Pseudo-backscattered (BSE) image:−250 V to −50 VThis produces a topogaphic image of thesample with no material contrast.5 kV – 30 kV min. 6 mmProcedure 1. In the GeminiSEM Control panel, select the Imaging tab.2. From the Signal A drop-down list, select SE2.3. Adjust the EHT, working distance (WD), and collector voltage according to the suggestionsin the table in order to optimize the image.InfoFor detailed information on working with the SE detector refer to Acquiring an Image [} 74].5.7.4 Setting up the VPSE DetectorThe VPSE detector is designed for VP applications. The VP mode enables analyzing and imaging ofnon-conducting, strongly gassing or moist specimens without any need for specimen preparation.Fig. 43: A rosemary leaf.The following settings are recommended for the VPSE detector:EHT Typical WD Collector Voltage1 kV – 30 kV 7–10 mm § Adjustable from 0 V to 1000 V§ Standard applications: 300 V§ Use a high collector voltage at low cham-ber pressures (<20 Pa)§ Beamsleeve bias should be set to 0 VPrerequisite ü The microscope is operating in VP vacuum modeProcedure 1. In the GeminiSEM Control panel, select the Imaging tab.2. From the Signal A drop-down list, select VPSE G4.Instruction Manual ZEISS GeminiSEM series | en-US | Rev. 2 | 349500-8138-000 93