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Saha Database


Selection of Cases

The available cases are shown in the entry page. The present version of the SAHA database includes results from the NLTE-3 Workshop [1,2] for steady-state calculations. Two links at the bottom of this page provide links to important relevant information. First, a user can access a list of codes and contributors. Second, a link to the Call for Submissions that contains detailed information on cases, submission formats, and other relevant issues.

Access to the database

There are two types of data access. The participants of the NLTE-3 Workshop are granted an unlimited password-protected access. All other users can retrieve exactly the same sets of data, and the only difference is that in this case the code labels are hidden. This is done in line with the general agreement achieved at the NLTE-3.

Selection of Parameters

The first output page provides the set of available parameters and options.

Plasma Parameters

Provides a list of available values of electron temperature and electron or ion (for Xe) densities.

Global Parameters

These parameters describe the most general kinetic characteristics, namely: A detailed description and units for these parameters can be found in the Call for Submissions section. The global parameters are displayed for a selected range of temperatures or densities. Therefore, a user has to select a corresponding X-axis (Te or Ne).

Ion Parameters

This set describes parameters characterizing specific ion stages. Those are: The output is generated as a function of the ion charge for a single pair of Te/Ne values.


The Xe case also contains data on bound-bound, bound-free, free-free, and total emission within the range of 9 to 120 Angstrom.

Java Plot Options

Database interface allows online generation of Java 2-D plots using the PtPlot applet developed in the framework of the Ptolemy II project at the University of California at Berkeley. The first output page provides options to (i) choose whether or not to create the Java plot (default is create), and (ii) select applet size in pixels.

Output Plot Axis Options

A number of output options are available for static plots:


The final output page contains a table of output parameters (both HTML and ASCII), a Java PtPlot applet, and links to plots in different formats, namely, Portable Network Graphics (PNG), Portable Data Format (PDF), PostScript (PS), and Encapsulated PostScript (EPS).

Java Plot

A user may use a mouse pointer to zoom in and zoom out different areas on the plot. There are four buttons in the upper right corner of the plot which provide advanced control: The "plot format" button allows user to modify plot title, X- and Y-labels, X- and Y-ranges, grid appearance, connecting lines, color/BW switch, and also set up user-defined ticks.


  1. Yu. Ralchenko, R. W. Lee, and C. Bowen, in: Proceedings of the 14th APS Topical Conference on Atomic Processes in Plasmas, Santa Fe, NM (2004).
  2. C. Bowen, R. W. Lee, and Yu. Ralchenko, J. Quant. Spectr. Rad. Tranf. 99, 102 (2006).

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  Online: February 2006   -   Last update: February 2006