Examples of using QCoDeS

These are all examples based on notebooks that can be found in https://github.com/QCoDeS/Qcodes/tree/master/docs/examples and below. To experiment with the examples you can download them directly from the git repository.

Basic examples

• 15 minutes to QCoDeS
  • Introduction
  • Installation
  • Module imports
  • Instruments
  • Parameters
    • Example of setting and getting parameters
  • Stations
    • Adding instruments to the station
    • Inspecting the station
    • Saving and loading configurations.
  • Databases and experiments.
    • Initialize or create a database
    • Load or create an experiment
  • Measurement Context Manager
    • Registering parameters to measure
    • Example measurement loop
  • Using the doNd multi-dimensional measurement utility
  • Exploring datasets and databases
    • List all datasets in a database.
    • List all the datasets in an experiment
    • Load the data set using one or more specifications
    • Plotting datasets
    • QCoDeS measurements live plotting with Plottr
    • Get data of specific parameter of a dataset
    • Export data to pandas dataframe
    • Export data to xarray
    • Explore the data using an interactive widget
  • Further Reading
    • QCoDeS configuration
    • QCoDeS instrument drivers
    • QCoDeS logging
• QCoDeS config
  • Configuring QCoDeS
  • Saving changes
    • Using custom variables in your experiment:
  • Changing core values
• QCoDeS Tutorials
  • Logging
  • Plotting
• Station
  • What is a Station?
  • How to create a Station and work with it?
    • Creating a Station
    • Accessing Station components
    • Removing components from a Station
    • Default Station
  • Snapshot of a Station
  • Configuring the Station by using a YAML configuration file
    • Example of YAML Station configuration
    • QCoDeS configuration entries related to Station
    • Using Station with YAML configuration files
    • Setting up Visual Studio Code to work with station files

Parameters

These notebooks provide some examples of how to tweak and customize the QCoDeS parameters to achieve different ends.

• Complex Numbers
  • Complex-valued parameters
    • Scalar-valued parameters
    • Array-valued parameters
• Legacy parameter examples
  • ArrayParameter
• MultiParameter
• ParameterWithSetpoints with setpoints defined on another instrument.
  • Measurement
• Parameters in QCoDeS
  • Responsibilities
  • Examples
    • Imports
    • Simple parameter subclass
      • Parameter definition
      • Demonstration of the get method
      • Demonstration of the set method
      • Inspecting parameter attributes
    • Virtual Parameters
      • Manually creating a virtual parameter
      • Instrument Parameters
• ScaledParameter
  • Resistive voltage divider
  • Voltage multiplier
  • Transimpedance amplifier
• Simple Example of ParameterWithSetpoints
  • Measurement
  • Measure a ParameterWithSetpoints while sweeping another parameter

DataSet

• Accessing data in a DataSet
  • Preparation: a DataSet from a dummy Measurement
  • DataSet indentification
  • Parameters in the DataSet
    • Run description
    • Interdependencies
      • Dependencies, inferences, standalones
      • ParamSpecBase objects
      • Other useful methods and properties
    • Shortcuts to important parameters
    • Note on inferences
    • Note on ParamSpec’s
  • Getting data from DataSet
    • get_parameter_data - the powerhorse
      • Avoid excessive calls to loading data
      • Loading data of selected parameters
    • to_pandas_dataframe_dict and to_pandas_dataframe - for pandas fans
    • Exporting to other file formats
    • Data extraction into “other” formats
• Dataset Benchmarking
  • Setup
  • Baseline: Generate data
  • Add to dataset inside double loop
  • Add the data in outer loop and store as np array
  • Save once after loop
  • Array parameter
  • Insert many
• DataSet class walkthrough
  • Note on DataSet object creation
  • Preparation: a DataSet from a dummy Measurement
  • Note on immutability of DataSet
  • DataSet indentity
    • GUID
    • Captured run ID
      • Note on run ID
    • Experiment and sample names
    • DataSet name
    • Note on experiments
      • Note on counter
  • DataSet info
    • Database file
    • Timestamps
    • Snapshot
    • Parent dataset links
    • Note on DataSet states
    • Note on metadata
  • Parameters in DataSet
    • Interdependencies
    • Shortcuts to important parameters
    • Note on ParamSpec’s
  • Data access in DataSet
    • Not recommended data access methods
  • What about the rest?
• Databases
  • Imports
  • Initialization, creation and upgrade
• DataSet Performance
  • Comparison between numeric/array data and binary blob
    • Case1: Short experiment time
    • Case2: Long experiment time
  • Loading the data
• Exporting QCoDes Datasets
  • Setup
  • Exporting data manually
  • Export data automatically
  • Automatically post process exported datasets.
  • Importing exported datasets into a new database
• Extracting runs from one DB file to another
  • Setup
  • Extraction
  • Merging data from 2 databases
  • Uniquely identifying and loading runs
• In memory dataset
  • Reloading data from db and exported file
• Linking to parent datasets
  • Example 1: Measuring and then fitting
    • Step 1: measure raw data
    • Step 2: Set up a fit “measurement”
• Measuring X as a function of time
  • Prepatory footwork: setup database and experiment
    • The measurement itself
• Offline Plotting Tutorial
  • A single, simple 1D sweep
    • Rescaling units and ticks
  • Two interleaved 1D sweeps
  • Regular 2D rectangular sweep scan
    • Customisations
      • Changing the colormap
      • Setting the colorscale to logarithmic
      • Setting limits on the colorscale
  • Warped 2D rectangular sweep scan
  • Interrupted 2D scans (a hole in the cheese)
  • Fancy plotting
  • Rasterizing
• Offline plotting with categorical data
  • 1D plotting
    • Category is the independent parameter
    • Category is the dependent parameter
  • Both variables are categorical
  • 2D plotting
    • Categorical data on the x-axis
    • Categorical data on the y-axis
    • Categorical data on the z-axis
      • Gridded setpoints
      • Scattered setpoints
    • Categorical data on x-axis and z-axis
• Offline plotting with complex data
  • Case A: a complex number as a function of a real number
  • Case B: a complex number as a function of two real numbers
  • Case C: a real number as a function of a complex number
• Paramtypes explained
  • Numeric
    • Numeric example 1
  • Array
    • Array example 1
    • Array example 2
    • Array example 3
  • Text
• Pedestrian example of subscribing to a DataSet
  • Call signature
  • Frequency
  • Order
    • Example 1: A notification
    • Example 2: ASCII Plotter
• Performing measurements using QCoDeS parameters and DataSet
  • Implementing a measurement
  • Accessing and exporting the measured data
  • Reloading datasets
    • DataSet GUID
  • Specifying shape of measurement
  • Performing several measuments concurrently
  • Interrupting measurements early
  • QCoDeS Array and MultiParameter
  • Avoiding verbosity of the Measurement context manager for simple measurements
  • Optimizing measurement time
  • The power of the Measurement context manager construct
    • Finer sampling in 2D
    • Simple adaptive 2D sweep
    • Random sampling
    • Optimiser
  • Subscriptions
    • Subscription example 1: simple printing
    • Subscription example 2: using the state
• Saving data in the background
  • Can I haz speedup?
  • Example Measurement
  • Data saving in the main thread
  • Saving in a background thread
  • Conclusion
• The Experiment Container
  • Required imports
  • The experiments inside the database
• Threaded data acquisition
  • Measurement 1: Non threaded data acquisition
  • Measurement 2: Threaded data acquisition
  • Non threaded and threaded data acquisition with do1d
    • Measurement 3: Non threaded data acquisition with do1d
    • Measurement 4: Threaded data acquisition with do1d
• Using doNd functions in comparison to Measurement context manager for performing measurements
  • Setup before measurement
  • 1D measurement
    • Measurement
    • do1d
  • 2D measurement
    • Measurement
    • do2d
  • Handling plot, experiment, and measurement_name with doNd
  • Generalized n-dimensional measurement (dond)
  • dond with multiple measurements (multiple datasets)
  • Sweep multiple parameters in parallel
  • Getting a value after setting it.
  • Actions in dond
• Working with snapshots
  • Useful imports
    • What is a snapshot?
    • How to create a snapshot?
  • Snapshot example for Parameter object
  • Snapshot of an Instrument
  • Station and its snapshot
    • Saving snapshot next to the measurement data
    • Extracting snapshot from dataset
    • Comparing how two DataSets were taken
• Working with Pandas and XArray
  • Setup
  • Working with Pandas
  • Working with XArray
• Importing data from legacy .dat files
• Subscriber with JSON export
• Example Measurements with Real Instruments
  • Measurement 1: Frequency sweeps
  • Measurement 2: Triangle Traces
• Read data from cache
• Write data to cache

Plotting

• How to use Plottr with QCoDeS for live plotting?
  • Mock Set-up
  • Initialize/Create Database
  • Launch Plottr Inspectr
    • If plottr is installed in same environment as measurements environment
  • Measurement
    • Measurement with run context manager
    • Measurement with doNd
  • Live Plot
• Auto Color Scale
  • TL;DR
  • Table of contents
  • Introduction to the problem and risks
  • Using the automatic color scale
    • Exampe 1: outliers in homogeneous data
  • Cuttoff Percentiles
    • Example 2: data on noisy background with outliers
    • Asymmetric cutoffs
  • Defaults and customizing the auto color scaling
  • Using auto color scaling in custom plotting

Drivers

• QCoDeS Example with Keysight E4980A LCR meter
• QCoDeS Example with Yokogawa GS200 and Keithley 7510 Multimeter
• QCoDeS example with Aim TTi PL601-P
• Qcodes example with DelegateInstrument driver
• QCoDeS example with Galil DMC4133 Controller
• Qcodes example with InstrumentGroup driver
• QCoDeS example with Keithley 3706A System Switch
• QCoDeS Example with Tektronix Keithley S46
• QCoDeS Example with the Rigol DG 1062 Instrument
• QCoDeS example with Textronix DPO 7200xx scopes
• QCoDeS Example with AMI430
• QCoDeS Example with Agilent 34400A
• QCoDeS Example with Alazar ATS 9360
• Qcodes example with Basel SP983c Preamp and its Remote SP983a
• QCoDeS Example with DynaCool PPMS
• QCoDeS Example with HP8753D
• QCoDeS Example with Itacho
• QCoDeS Example with with Keithley 2600 series
• QCoDeS Example with Tektronix Keithley 7510 Multimeter
• QCoDeS Example with Keysight 33500B
• QCoDeS Example with Keysight 344xxA
• QCoDeS Example with Keysight 34980A Multifunction Switch / Measure Mainframe and Modules
• Qcodes example with Keysight B1500 Semiconductor Parameter Analyzer
• QCoDeS Example with Keysight B2200 Series Femto Leakage Switch Matrix
• QCoDeS Example with Keysight Infiniium Oscilloscopes
• Qcodes example with Keysight N9030B
• QCoDeS Example with Keysight Network Analyzers
• QCoDeS Example with Lakeshore 325
• QCoDeS Example with the Lakeshore Model 372 to Control the Temperature of the Bluefors Fridge
• QCoDeS Example with Minicircuits Switch Boxes Controlled via USB
• QCoDeS Example with Mercury iPS
• QCoDeS Example with Oxford Triton
• QCoDeS Example with QDac_channels
• QCoDeS Example with Rigol DP832 Power Supply
• QCoDeS Example with the Rigol DS 1074 Z oscilloscope
• QCoDeS Example with Rohde Schwarz RTO 1000 Series Oscilloscope
• QCoDeS Example with Rohde Schwarz SGS100A RF source
• QCoDeS Example with Rohde Schwarz ZNB20/8
• QCoDeS Example with the Stahl Bias Sources
• QCoDeS Example with Stanford SR830
• QCoDeS Example with Standford Research SR86x Lock-in Amplifier with Buffered Readout
• QCoDeS Example with Tektronix AWG5014
• QCoDeS Example with Tektronix AWG70002A
• QCoDeS Example with Tektronix TPS2012
• QCoDeS Example with Yokogawa GS200/GS210
• QCoDeS Example with Tektronix Keithley 2450 Source Meter
• QCoDeS+Broadbean Example with Tektronix AWG5208
• QCoDeS Example with Signal Hound USB-SA124B
• QCoDeS Example with Signal Hound USB-SA124B ParameterWithSetpoints

Writing Drivers

This folder contains examples that are useful when you want to write your own driver for a new instrument.

• A ParameterWithSetpoints Example with Dual Setpoints
  • Measurement 1: Time Trace
  • Measurement 2: Periodogram
  • Measurement 3: 2D Sweeping
• Creating QCoDeS instrument drivers
  • Base Classes
  • Parameters and Channels
    • What’s a Parameter?
    • Functions
    • What’s an InstrumentModule, then?
  • Naming Instruments
    • Naming the Instrument class
    • Naming InstrumentModule classes
    • Driver supporting multiple models.
  • Logging
  • VisaInstrument: a more involved example
  • VisaInstruments: Simulating the instrument
  • DLL-based instruments
  • Manual instruments
  • Custom Parameter classes
    • On/Off parameters
  • Dynamically adding and removing parameters
  • Handling interruption of measurements
  • Organization
  • Documentation
• Creating Simulated PyVISA Instruments
  • What?
  • Not!
  • How?
  • Example: Weinschel8320
    • The .yaml file
    • The test
  • Congratulations! That was it.
  • Bonus example: including parameters in the simulated instrument
  • That’s it!
• Instrument
  • Instrument responsibilities:
  • Instruments can fail:
  • Example notebooks about Instruments:
• Abstract Instruments and parameters
  • We cannot instantiate a Instrument with abstract parameters.
  • Units of parameters defined in sub classes must match units defined in the base class
• Working subclass

Logging

• Logfile parsing
  • Get the query time for the SR860
  • Find the elapsed times
    • Visualise!
• Logging
  • TL;DR
  • Contents
  • Introduction
  • Instrument communication loggers
  • Set up logging in QCoDeS
    • QCoDeS default handlers
    • IPython command history
  • Temporarily elevating the logging level
  • Filtering log messages by instrument
  • Capturing Pandas.DataFrame