HAO Spectral Diagnostic Package For Emitted Radiation (HAOS-DIPER)

Version 1.1 (8 Jan 2013, minor changes for IDL V8)

Reference Guide:
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HAOS-DIPER is an IDL-based database and software system for working with data from atoms and atomic ions. HAOS-DIPER grew out of a need to work with and manipulate data for neutral atoms and atomic ions to understand radiation emitted by some space plasmas, notably the solar atmosphere and stellar atmospheres. An early version was described by Judge and Meisner (1994). Since then, other packages have become available which substantively perform many of the tasks originally intended for HAOS-DIPER. These include CHIANTI (Dere et al. 1997, Landi et al. 2006, and references therein), and ADAS (Summers 2003, Badnell et al. 2003). However, HAOS-DIPER has some properties which together make it unique:

  • It is based upon the fast, flexible database software system written by D. Lindler for IDL, and takes some advantage of this system.
  • It works with quantum numbers for atomic levels, enabling it to perform tasks otherwise difficult or very tedious, including a variety of data checks, calculations based upon the atomic numbers, and searching and manipulating data based upon these quantum numbers.
  • In principle, HAOS-DIPER can handle conditions from LTE to coronal-like conditions, in a manner controlled by one system variable !REGIME.
  • There is some capability for estimating data for which no accurate parameters are available, and for accounting for the effects of missing atomic levels.


The image shows the power radiated as a function of time by emission lines of carbon, from singly ionized to hydrogen-like carbon. The initial state is one of a "cold" plasma, and the evolution of the atomic system is followed assuming sudden heating to 106 Kelvin, at an electron density of 1011 cm-3. The power radiated in the various lines evolves in response to the sudden heating, under conditions which might be relevant for a chromospheric flare. Each horizontal line represents the power emitted by each line, with a maximum of unity. Calculation made using the HAOS-DIPER procedure timeser.pro.


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