How to run the TCT system

• For cold measurements, open compressed air (open partially the valve) and turn on the chiller, setting the desired temperature of the cooling liquid
• Turn on Laser and motors
• Turn on power supply of amplifier. Set voltage between 6V and 15V (12V-15V: maximum gain. 6V: approximately 0.15 of maximum gain. Below 6V: not stable)
• Start Platinum program for the peltier controller and set temperature
  • select ethernet and connect 134.158.155.171, port 502
  • set point, then click run
  • observe current absorbed on PS and temperature on controller (EA-PS 2024-10B)
• Start the data acquisition program (tabview-based): 3D TCT MAIN
  • before running the program, set the initial parameters
    • Voltage source 1 (bias): select keithley 2410, gpib address 24; set current compliance; set Initiliatise at start to TRUE
  • run the program (white hollow arrow)
  • click on Init devices
  • Apply bias from Voltage source 1 panel
    • POSITIVE VOLTAGE!!! bias through the front, GND on the box and back
    • from this panel you can choose the parameter of the ramp (time between steps, number of steps, final voltage)
    • turn bias source 1 to ON
    • don't forget to set the bias to REAR if using back connectors on Keithley
  • Oscilloscope tab
    • set trigger channel, delay (default) and level
  • Movement Parameters
    • set as start to use current position as initial one
  • Data acquisition: save file with .tct extension
• Particular LASER control: to activate laser (frequency, ON/OFF, ..)
• Analysis software:
  • TCT folder -> TCT-Analyse -> tct-analysis-qt -> select files -> start analysis -> select the file -> run browser
  • In new version there will be a pedestal subtraction
  • Charge vs distance plot to check focus
  • Configuration can be stored/reopen through config files
  • edge-tct -> extra int. time parameter for prompt current analysis
  • top-tct and photodiode

Tutorial

• A tutorial on the usage of the system is given in this document: TCTMeasurementsTutorial.pdf

Analysis developers guide

• Further analyses can be developed and added to the analysis framework. A guide for developing new analysis is given in this document: tctanalysis_developers_guide.pdf

-- GiovanniMarchiori - 2016-04-27