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Overview Our group consists of research scientists and students focussed on designing and executing ground-based laboratory astrophysics experiments for producing spectral data needed for analyzing space-based observations of celestial sources, including the Sun, comets, planetary atmospheres, galaxy clusters, cool and hot stars, and supernova remnants. The laboratory data come primarily from experiments conducted at the Lawrence Livermore National Laboratory's EBIT-I and SuperEBIT electron beam ion traps. We also generate data in measurements we undertake at the National Spherical Torus Experiment at the Princeton Plasma Physics Laboratory, at the Alcator tokamak at MIT, and at the Linac Coheren Light Source at Stanford as well as through collaborations with other experimental groups, e.g., the LHD stellarator group at the National Institute of Fusion Science in Toki, Japan. We apply our measurements to the analysis of astrophysical observations, which include spectra from Suzaku, Chandra, XMM-Newton, the Solar Maximum Mission, and Swift. Our work also entails the development of novel data analysis tools, such as the Photon Clean Method and the Flexible Atomic Code. For more information or if you would like to join our laboratory astrophysics collaboration, please contact Peter Beiersdorfer (beiersdorfer(at)ssl.berkeley.edu). People & Facilities People Special Compendium of papers describing spectroscopic research conducted with the Livermore electron beam ion traps. The compendium was produced by our group as part of the celebration of 20 Years of Spectroscopy with EBIT. The Astro-EBIT Spectral Database This is a compilation of laboratory measurements of wavelengths, cross sections, and example spectra of radiation emitted from celestial sources. These web pages are still work in progress. Data for Collisional Sources |
The FLEXIBLE ATOMIC CODE (FAC) The Flexible Atomic Code is a free resource for calculating atomic data and generating spectral models needed in the analysis of astrophysical spectra. Download it here. Recent Results • Lab tests of charge exchange with solar wind ions• EUV Spectroscopy on NSTX • Calculations of radiative rates • L-shell emission lines of aluminum • FeXVI emission from Capella • Dieletronic satellite lines of FeXXV and FeXXVI • Calibration of density diagnostics • New coronal temperature diagnostic • L-shell tungsten lines for x-ray diagnostics • Fe M-shell lines: CHIANTI and experiment • Time-resolved EUV spectra from NSTX • Advanced calculations of Fe XVI • Laboratory astrophysics with EBIT • Identification of FeXV L-shell lines • Silicon and sulfur in cygnus X-1 • M-shell Iron spectra from NSTX
Some of our Older Papers • Laboratory astrophysics in the extreme ultraviolet Workshops & Conferences Organized by our Group Workshop on Creating Antimatter with intense lasers (April 27-28, 2010, Berkeley, California) The 10th International Colloquium on Atomic Spectra and Oscillator Strengths (ASOS) for Astrophysical and Laboratory Plasmas (Aug 3-7, 2010, Berkeley, California)
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