88 citations · 337 across the 11 of their papers we have counts for
11 papers
A Transition-edge Sensor-based X-ray Spectrometer for the Study of Highly Charged Ions at the National Institute of Standards and Technology Electron Beam Ion Trap
P. Szypryt, G. C. O'Neil, E. Takacs +15
We report on the design, commissioning, and initial measurements of a Transition-edge Sensor (TES) x-ray spectrometer for the Electron Beam Ion Trap (EBIT) at the National Institut…
On low-energy tail distortions in the detector responsefunction of x-ray microcalorimeter spectrometers
G. C. O'Neil, P. Szypryt, E. Takacs +12
We use narrow spectral lines from the x-ray spectra of various highlycharged ions to measure low-energy tail-like deviations from a Gaussian responsefunction in a microcalorimter x…
Measurement of the Kr XVIII 3d lifetime at low energy in a unitary Penning trap
Nicholas D. Guise, Joseph N. Tan, Samuel M. Brewer +2
A different technique is used to study the radiative decay of a metastable state in multiply ionized atoms. With use of a unitary Penning trap to selectively capture Kr ion…
Capture and isolation of highly-charged ions in a unitary Penning trap
Samuel M Brewer, Nicholas D Guise, Joseph N Tan
We recently used a compact Penning trap to capture and isolate highly-charged ions extracted from an electron beam ion trap (EBIT) at the National Institute of Standards and Techno…
Quantum interference and light polarization effects in unresolvable atomic lines: application to a precise measurement of the 6,7 Li D2 lines
Roger C. Brown, Saijun Wu, J. V. Porto +5
We characterize the effect of quantum interference on the line shapes and measured line positions in atomic spectra. These effects, which occur when the excited state splittings ar…
Highly Charged Ions in Rare Earth Permanent Magnet Penning Traps
Nicholas D. Guise, Samuel M. Brewer, Joseph N. Tan
A newly constructed apparatus at the National Institute of Standards and Technology (NIST) is designed for the isolation, manipulation, and study of highly charged ions. Highly cha…
Penning traps with unitary architecture for storage of highly charged ions
Joseph N. Tan, Samuel M. Brewer, Nicholas D. Guise
Penning traps are made extremely compact by embedding rare-earth permanent magnets in the electrode structure. Axially-oriented NdFeB magnets are used in unitary architectures that…
Fundamental constants and tests of theory in Rydberg states of one-electron ions
U. D. Jentschura, P. J. Mohr, J. N. Tan
The nature of the theory of circular Rydberg states of hydrogenlike ions allows highly-accurate predictions to be made for energy levels. In particular, uncertainties arising from…
Fundamental constants and tests of theory in Rydberg states of hydrogen-like ions
U. D. Jentschura, P. J. Mohr, J. N. Tan +1
Comparison of precision frequency measurements to quantum electrodynamics (QED) predictions for Rydberg states of hydrogen-like ions can yield information on values of fundamental…
Visible, EUV, and X-ray Spectroscopy at the NIST EBIT Facility
J. D. Gillaspy, B. Blagojevic, A. Dalgarno +13
After a brief introduction to the NIST EBIT facility, we present the results of three different types of experiments that have been carried out there recently: EUV and visible spec…
A High Efficiency Ultra High Vacuum Compatible Flat Field Spectrometer for EUV Wavelengths
B. Blagojevic, Eric-Olivier Le Bigot, K. Fahy +8
A custom, flat field, extreme ultraviolet EUV spectrometer built specifically for use with low power light sources that operate under ultrahigh vacuum conditions is reported. The s…