An x-ray TES spectrometer for the NIST electron beam ion trap

26 Jul 2019, 09:30
15m
Auditorium G. Testori (Milano)

Auditorium G. Testori

Milano

Piazza Città di Lombardia, 1, 20124 Milano MI
Invited Presentation Low Temperature Detector Applications Orals LM 004

Speaker

Dr Galen O'Neil (NIST)

Description

An Electron Beam Ion Trap (EBIT) is a powerful tool for studying highly charged ions. Understanding highly charged ions is critical to understanding plasmas encountered in stars, other astrophysical phenomena, and fusion energy facilities. The extreme electric fields and small atomic radii of highly charged ions also make them an ideal system for tests of quantum field theory.  Highly charged ions emit x-rays whose energy reveals the electronic level structure, temperature, and other properties of the ions. Often these complex x-ray fingerprints are difficult to exploit due to low fluxes inherent to the technique.  We installed a transition edge sensor microcalorimeter array x-ray spectrometer on the NIST EBIT.  This spectrometer provides a unique combination of high quantum efficiency, broadband spectral response, high resolving power, and microsecond time resolution. These capabilities enable simultaneous multi-line measurements, the detection of extremely faint lines, and the potential to study lifetimes and other time-dependent physics. We discuss first-light results including measurements of high-resolution x-ray spectra from a number of high-Z ions of the Nickle isoelectronic sequence (high-Z atoms ionized to have 28 electrons, and thus a comparable electronic structure to neutral Nickle), and from several highly-charged ions of Iridium, and prospects for future measurements of phenomena such as dielectronic recombination.

Less than 5 years of experience since completion of Ph.D N
Student (Ph.D., M.Sc. or B.Sc.) N

Primary authors

Dr Galen O'Neil (NIST) Paul Szypryt (National Institute of Standards and Technology) Mr Sean Buechele (NIST) W. Bertrand (Randy) Doriese (NIST) Dr Malcolm Durkin (NIST) Joseph Fowler (NIST) Dr Johnathon Gard (NIST) Gene Hilton (NIST-Boulder) Kelsey Morgan (NIST) Mr Aung Naing (NIST) Carl Reintsema (NIST) Daniel Schmidt (NIST) Daniel Swetz (NIST) Mr Joseph Tan (NIST) Mr Endre Takacs (Clemson) Joel Ullom (NIST/University of Colorado) Dr Yuri Ralchenko (NIST)

Presentation Materials