Laboratory Astrophysics Needs for Understanding Photoionized Plasmas

Details Laboratory Astrophysics Needs for Understanding Photoionized Plasmas Laboratory Astrophysics Needs for Understanding Photoionized Plasmas

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002nla..work...51f&link_type=abstract

NASA Laboratory Astrophysics Workshop, held May 1-3 2002 at NASA Ames Research Center, Moffett Field, CA 94035-1000. Publisher:

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

Nearly all astronomical environments are far from equilibrium. As a result, the emission we observe is sensitive to details within the source that created it. This is why spectroscopy is such a powerful tool for understanding the physics of the cosmos, but it also presents a challenge because the spectrum is sensitive to the atomic processes that determine its emission. Although some of the needed atomic data can be provided by existing theory codes, much must be studied experimentally, especially those involving collisions. Currently no national US facility exists for such investigations. NASA researchers currently must look to Europe for such facilities. We propose a coordinated program, based at Oak Ridge National Laboratory (ORNL), which would provide a national focus for efforts to generate the needed atomic data. The central facility would be a storage ring that would directly measure the needed processes. A data center and internet-based community of astrophysical modelers would be associated with the facility and provide both dissemination of data and guidance in future data needs. The Center could build upon ORNL resources that fall within its current fusion program and so accomplish its goals at relatively modest cost.

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