6533b7defe1ef96bd12768db
RESEARCH PRODUCT
Laboratory astrophysics survey of key x-ray diagnostic lines using a microcalorimeter on an electron beam ion trap
I KinkHerbert W. SchnopperSimon R. BandlerEndre TakacsS. S. MurrayNancy BrickhouseJames V. PortoJohn D. GillaspyD.a. LandisMarco BarberaEric H. SilverJeffrey W. BeemanJ. M. LamingNorman W. MaddenEugene E. Hallersubject
Physics::Instrumentation and DetectorsAstrophysics::High Energy Astrophysical Phenomenachemistry.chemical_elementFizikai tudományokAstrophysicsSpectral lineNeonTermészettudományokAtomic processeIonizationPhysics::Atomic PhysicsAtomic dataNuclear and High Energy PhysicPhysicsArgonKryptonAstronomy and AstrophysicsLine: IdentificationPlasmaX-rays: GeneralchemistrySpace and Planetary ScienceAstrophysical plasmaMethods: Laboratory plasmaAtomic physicsElectron beam ion trapdescription
Cosmic plasma conditions created in an electron beam ion trap (EBIT) make it possible to simulate the dependencies of key diagnostic X-ray lines on density, temperature, and excitation conditions that exist in astrophysical sources. We used a microcalorimeter for such laboratory astrophysics studies because it has a resolving power ≈1000, quantum efficiency approaching 100%, and a bandwidth that spans the X-ray energies from 0.2 keV to 10 keV. Our microcalorimeter, coupled with an X-ray optic to increase the effective solid angle, provides a significant new capability for laboratory astrophysics measurements. Broadband spectra obtained from the National Institute of Standards and Technology EBIT with an energy resolution approaching that of a Bragg crystal spectrometer are presented for nitrogen, oxygen, neon, argon, and krypton in various stages of ionization. We have compared the measured line intensities to theoretical predictions for an EBIT plasma.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-09-20 |