Tutorial

PyJEM is a Python package that provides TEM control, live image capture, and related workflows. This section includes setup verification, quick-run examples, and package-specific tutorials.

Recommended start: Quick Start: Run PyJEM and Use Each Package

• Getting Started
  • Step 1: Activate vjem and Start Python
  • Step 2: Verify that PyJEM is importable
  • Step 3: Import the packages
• Service connectivity check
  • Step 1: Activate vjem and Start Python
  • Step 2: Confirm that the required services are running
  • Appendix: If a service is not reachable
• About detector/camera control packages
  • Package summary
  • How to use this page
  • Section A: detector, detectorext, sightx
  • Section B: femtus.acquisition
• TEM3: control magnification
  • 0. Import TEM3
  • 1. Get current mag value
  • 2. Change the magnification
  • 3. Increase the magnification by some step
• TEM3: Exception handling & change timeout period
  • Exception class structure
  • 1. Import
  • 2. ErrorTypeKind — subsystem that raised the error
  • 3. ErrorCodeKind — category of the error
  • 4. Triggering a real TEMError with EOS3.UpSelector()
  • 5. Branching on error kind
  • 6. Extending the timeout with TEM3.SetRecvTimeout()
• TEM3: AutoFlashing Tutorial
  • Step 1. Close beam valve
  • Step 2. Turn emission off
  • Step 3. Wait until emission is fully off
  • Step 4. Start auto flashing
  • Step 5. Wait until auto flashing completes
  • Step 6. Turn emission on
  • Step 7. Wait until emission is fully on
• TEM3: event tutorial
  • 1. Checking EventManager and Event Types
  • 2. Registering Callbacks
  • 3. Monitoring Real-Machine Events (Hardware Required)
  • Appendix: Manipulating the Event Queue (Offline)
• EELS: Acquisition and Analysis
  • Flow Overview
  • SI Cube
  • Line
• FEMTUS: worksheet / repository
  • Worksheet structure
  • Repository: saving and loading worksheets