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1. User interface

In this chapter all commands accessible through the user interface will be discussed. The user interface contains the following elements:
· Menu bar;
· Spectral view;
· Plot view;
· Data view.
An image showing the layout and names of these elements can be found in the topic User interface.

Menu bar

The menu bar contains a shortcut to the most important options of Gamman.


Menu bar


CommandDescription
Create from mDOS jsonCreate a GSF file from json files obtained in mDOS
Create from MDLCreate a GSF file from MDL files
Open ProjectOpen an existing GSF file
Toggle viewSwitch between plot view and  spectral view
SelectionProcess only the selected raw (untagged) data using a specified fitting scheme
Process allProcess all of the raw (untagged) data using a specified fitting scheme
PlotPlot a graph with the specified settings in the plot view
Plot settingsOpen the plot settings dialog to alter the appearance of the chart in the plot view or spectral view
or to print one of the views
View logOpens the project log viewer

Spectral view

The Spectral view consists of a graph containing spectral information about the current selected data points and a menu bar on the left containing information and settings. This chapter will describe these various elements.


Spectral view

Vertical logarithmic scale (Y-axis) represents the total number of gamma particles counted by the sensor. Horizontal linear scale (X-axis) represents the gamma energy. The gamma energy keV (kilo electron volt) is the unity of energy of a particle.


Left menu bar

       
     

Fitresults

Contains no commands but information about the fit of the current selection (concentration of radio nuclides and stabilization factors):
· Concentration of the radio nuclides in [Bq/kg] or [ppm] and countrate [particles/s];
· Standard deviation (indicated with letter 'S') of the radio nuclides and countrate [Bq/kg] or [particles/s] ;
· Chi2 and Stabilization (A1) values containing information about the quality of the fit and stabilization.

More information can be found in the topic Stabilization.

Stabilization

CommandDescription
Linear stabilization (A1)Linear widening of the spectrum caused by difference in temperature.
Only applies to selected spectra and can be stored after changing.
Offset (A0)Horizontal offset of the spectrum.
Alinearity (A2)Squared widening of the spectrum, correcting for the possible alinearity in the measurement.
LLDLower level discriminator [keV]. LLD data is used for stabilization, but not used in the fitting procedure.
ULDUpper lever discriminator [keV]. ULD data is used for stabilization, but not used in the fitting procedure.

Settings

CommandDescription
Show backgroundMake backround spectrum visible or invisible in the spectral view
Y-axis maximumSet the maximum value of the Y-axis (total counts) to a certain value.
Values from 10 to 1000.000 can be chosen as well as an automatic mode.
Y-axis range

Set the ratio between the maximum and minimum value on the Y-axis to a certain value
Values from 100 to 100.000 can be chosen.

Log fit results-

Plot view

The plot view consist of a graph where the various data fields inside the data set can be plotted against each other. The plot can be modified using the left menu bar.

Plot view

The source of the axis can be changed in the left menu bar.

Left menu bar

     
     

Data source

CommandDescription
X-axisChange the source data of the horizontal axis
Y-axisChange the source data of the vertical axis
Z-axisChange the source data of the Z-axis, displayed as a color
Normal recordsSet normal records to be visible or invisible in the plot view
Tagged recordsSet Tagged records to be visible or invisible in the plot view
Highlight selectionSet selected records in the data table to be visible or invisible in the plot view


Z-Range

CommandDescription
Minimum ZDefines the lower limit of the color scale (blue)
Maximum ZDefines the upper limit of the color scale (red)
Method
Min/MaxUse the lowest/highest value from the data set for the minimum/maximum z
x-sigma

Use x times the value of the standard deviation for the minimum and maximum z

x can be 1 to 4


Tagging

CommandDescription
Tag recordsTag all records enclosed by the polygon in the plot view
Clear recordsUndo tags of selected records enclosed by the polygon
Delete taggedDelete all tagged records
Erase polygonClear the current polygon

Data view

The data viewer displays the data imported numerically. From the data viewer, tags and selections can be made. The menu is available by right clicking on the table. Double clicking a data column while in the view log will show statistics (minimum, maximum, average, standard deviation).

Data viewer


CommandDescription
Raw dataData tab with only the raw data. This tab cannot be deleted.
Scrapbook

Data processed by "Process selection" and "Average and fit selection" will appear here.

This tab cannot be deleted.

Processed dataData tab containing data which is processed by using "Process all".
This tab can have any name given after processing.
Airborne FSAData tab containing data which is processed by FSA airborne corrections.
This tab can have any name given after processing.
Tag selectionTag selected ites from the dat viewer table.
Untag selectionUndo the tagging of the seleted tagged items.
CalculatorOpens the calculater used to modify or replace data.
Edit column nameEdit the name of the right-clicked column.





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