Close This Window

Please download official ILL logos here


For using on the web or on a screen

For printing in high resolution

White version, for dark backgrounds



Download PNG

Download TIF

Download white PNG

Download JPG

Download EPS

Download white EPS logo

Institut Laue-Langevin

The Computing for Science (CS) group supports ILL scientists, students and visitors in a number of activities including data analysis, instrument simulation and sample simulation.

Back to ILL Homepage
English French Deutsch 

All Software

The Light Menus

The Light Menus are situated on top of the Main frame window, and are indicated by a '>' sign.

 



Light Main frame top

Light Middle section of main frame


 

1. File

This menu gathers operations dealing with files, input and output

Edit Light Preferences
   set simulation mode, directories, configuration files, verbosity...
Save Light Preferences
   save Preferences (also done at Exit)
Show Light Log File
   display the "Light on George" Log file (errors, events, etc...)
Show MAD Log File
   display the MAD Log file (instrument commands, counts, errors, etc...)
Restart Light
   restart Light and read configuration files.
Exit
   save Preferences, exit Light program, close associated IDL windows

2. Setup

This menu enables to customise the configuration of the instrument/experiment

Refer to the specific Help menu of the Light:Setup:Instrument window for additional information


Displays

set the displays to show in the Display Panel. See dedicated Help on that topic.


Regions of Interest (ROIs)

edit/define ROIs on which to perform accuracy analysis (see below), using the cumulated signal (for repeated countings). In order to be efficient each ROI should contain, as far as possible, isolated peaks or features that are thought to be of particular interest to the physicist.


Analyse ROIs

basic statistics are performed for each defined ROI. This includes the computation of the noise/signal ratio, the normalised Chi squared corresponding to a fit using a single Gaussian peak over a background parabola, and an estimate of the deduced relative uncertainty for this simple model. When all these values are better (lower) than the "Relative Error" parameter of the Run Options, it is assumed that a reasonable statistics has been achieved. Then, if the "Count on Statistics" Run Option is active, the counting is terminated, and goes-on with the next run in the sequence.


SuperUser Login

ask the SuperUser password. Close the dialog to log-out from SuperUser Mode.


Control Mode {Active|Simulation}

display/toggle the current Instrument Control Mode. When in Simulation Mode, Light is passive, and only 'looks' at the experiment/instrument. No commands are executed.


Load Configuration

loads a Light configuration file (extended preferences with instrument setup)


Save Configuration

saves a Light configuration file (extended preferences with instrument setup)

3. Runs

This menu gathers operations concerning how to execute experiment runs/scans.
Each run is an acquisition period at a given temperature. You may repeat runs and give them descriptive titles (facilitate identification of files). Some options concerning the automatic checks/tasks during runs may be activated.

Load Run/Sequence
   load a Run/Sequence file and display its contents (in Exp. Runs section)
Save Run/Sequence
   save the current Run/Sequence into a file
Analyse/Show
   display a time analysis of Runs as a table
Run Options
   set temperature control and options, as well as Diagnosis and Count On Statistics parameters
Clear All Runs
   remove all Run definitions but the first
Delete Current Run
   remove current Run definition from the Sequence
Insert
   duplicate the current Run in the Sequence
Next Run (go to)
   display next Run of the Sequence
Start Single Run
   start only the current displayed Run
Start Sequence
   start the whole run sequence (from Run #0 to the last Run)
Stop Run/Sequence
   stop current Run/Sequence
Pause
   sends a Pause request (countings)
Resume
   resumes a previously paused counting

4. Help

When the Help window is active, it may be updated on-the-fly by the windows poped-up. For instance, when opening the Run Options window, the help text relative to that window is displayed (replaces the previous help text).

5. Start

This menu is situated on top of the middle part 'EXP. RUNS' of the Main frame window. It gives a quick (and equivalent) access to some of the Runs menu.


Start Single Run

start only the current displayed Run


Start Sequence

start the whole run sequence (from Run #0 to the last Run)


Pause

sends a Pause request (countings)


Resume

resumes a previously paused counting
Next to it are also some useful buttons:

[Stop]
   stop current Run/Sequence
[Analyse]
   display a time analysis of Runs as a table
[Next]
   display next Run of the Sequence
[Delete]
   remove current Run definition from the Sequence
[Insert]
   duplicate the current Run in the Sequence