A. Warczak
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View article: Quantum Electrodynamics in Strong Electromagnetic Fields: Substate Resolved <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">K</mml:mi><mml:mrow><mml:mi>α</mml:mi></mml:mrow></mml:mrow></mml:math> Transition Energies in Heliumlike Uranium
Quantum Electrodynamics in Strong Electromagnetic Fields: Substate Resolved Transition Energies in Heliumlike Uranium Open
Using novel metallic magnetic calorimeter detectors at the CRYRING@ESR, we recorded x-ray spectra of stored and electron cooled heliumlike uranium (U90+) with an unmatched spectral resolution of close to 90 eV. This allowed for an accurate…
View article: Investigation of dielectronic recombination in neon ions using EBIT
Investigation of dielectronic recombination in neon ions using EBIT Open
Electron Beam Ion Traps (EBITs) provide a controlled environment for studying electron-ion interactions, particularly in highly charged ions (HCIs), and enable precise measurement of processes, such as dielectronic recombination (DR). Usin…
View article: Quantum Electrodynamics in Strong Electromagnetic Fields: Substate Resolved K$α$ Transition Energies in Helium-like Uranium
Quantum Electrodynamics in Strong Electromagnetic Fields: Substate Resolved K$α$ Transition Energies in Helium-like Uranium Open
Using novel metallic magnetic calorimeter detectors at the CRYRING@ESR, we recorded X-ray spectra of stored and electron cooled helium-like uranium (U$^{90+}$) with an unmatched spectral resolution of close to 90 eV. This allowed for an ac…
View article: L-Mn dielectronic recombination of cerium ions in a room-temperature EBIT
L-Mn dielectronic recombination of cerium ions in a room-temperature EBIT Open
We explore the dielectronic recombination structures at the electron beam ion trap at Jagiellonian University in Cracow, emited by cerium that is produced by the high-current cathode made of iridium and cerium. Small amounts of these eleme…
View article: A high-resolution asymmetric von Hamos spectrometer for low-energy X-ray spectroscopy at the CRYRING@ESR electron cooler
A high-resolution asymmetric von Hamos spectrometer for low-energy X-ray spectroscopy at the CRYRING@ESR electron cooler Open
We present research program and project for high-resolution wavelength-dispersive spectrometer dedicated to low-energy X-ray spectroscopy at the electron cooler of the CRYRING@ESR storage ring, which is a part of the international Facility…
View article: A high-resolution asymmetric von Hamos spectrometer for low-energy X-ray spectroscopy at the CRYRING@ESR electron cooler
A high-resolution asymmetric von Hamos spectrometer for low-energy X-ray spectroscopy at the CRYRING@ESR electron cooler Open
We present research program and project for high-resolution wavelength-dispersive spectrometer dedicated to low-energy X-ray spectroscopy at the electron cooler of the CRYRING@ESR storage ring, which is a part of the international Facility…
View article: Hypersatellite Kα Production in Trapped Ar Ions at KK Trielectronic Recombination Energies
Hypersatellite Kα Production in Trapped Ar Ions at KK Trielectronic Recombination Energies Open
We report measurements of hypersatellite radiation of argon ions in the electron energy region of 5200 eV to 7500 eV. Here, we observed a strong enhancement of this hypersatellite Kαh production. Trielectronic recombination (TR) is discuss…
View article: Towards an Intrinsic Doppler Correction for X-ray Spectroscopy of Stored Ions at CRYRING@ESR
Towards an Intrinsic Doppler Correction for X-ray Spectroscopy of Stored Ions at CRYRING@ESR Open
We report on a new experimental approach for the Doppler correction of X-rays emitted by heavy ions, using novel metallic magnetic calorimeter detectors which uniquely combine a high spectral resolution with a broad bandwidth acceptance. T…
View article: Higher-Order Recombination Processes in Argon Ions Observed via X-ray Emission in an EBIT
Higher-Order Recombination Processes in Argon Ions Observed via X-ray Emission in an EBIT Open
In electron–ion collisions, recombination processes play a very important role. Recently, multielectron recombination processes have been highly investigated, as they carry information about electron–electron interaction. Among them, the m…
View article: Angular Distribution of Characteristic Radiation Following the Excitation of He-Like Uranium in Relativistic Collisions
Angular Distribution of Characteristic Radiation Following the Excitation of He-Like Uranium in Relativistic Collisions Open
In this paper, we present an experimental and theoretical study of excitation processes for the heaviest stable helium-like ion, that is, He-like uranium occurring in relativistic collisions with hydrogen and argon targets. In particular, …
View article: Evidence of trielectronic recombination for Ar ions in an EBIT
Evidence of trielectronic recombination for Ar ions in an EBIT Open
Synopsis Trielectronic recombination has been investigated for Ar ions in a compact, room-temperature electron beam ion trap. A significant increase in hollow-core emission has been observed at the expected beam energy (~ 6.4 keV) for the …
View article: Charge State Evolution in Electron Beam Ion Trap
Charge State Evolution in Electron Beam Ion Trap Open
Recently, at the M. Smoluchowski Institute of Physics of the Jagiellonian University a commercial electron beam ion trap (EBIT) was installed for teaching and scientific purposes. The first experiments were focused on observation of radiat…
View article: Concept and simulations of a high-resolution asymmetric von Hamos X-ray spectrometer for CRYRING@ESR electron cooler
Concept and simulations of a high-resolution asymmetric von Hamos X-ray spectrometer for CRYRING@ESR electron cooler Open
Synopsis A concept of a high resolution asymmetric von Hamos X-ray spectrometer for the CRYRING@ESR electron cooler is described and its characteristics obtained by ray-tracing Monte-Carlo simulations are presented. The spectrometer will b…
View article: Enhanced Ar‐K X‐ray emission observed in EBIT at electron energies around 6,500 eV
Enhanced Ar‐K X‐ray emission observed in EBIT at electron energies around 6,500 eV Open
Recently (2015) at the Institute of Physics of the Jagiellonian University, a commercial electron beam ion source (Dresden EBIT, DREEBIT Co.) was installed for teaching and scientific purposes. The first experiments were focused on observa…
View article: Electron- and proton-impact excitation of heliumlike uranium in relativistic collisions
Electron- and proton-impact excitation of heliumlike uranium in relativistic collisions Open
We have studied the $K$-shell excitation of He-like uranium ($\\textbf{U}^{90+}$) in relativistic collisions with hydrogen and argon atoms. Performing measurements with different targets, as well as with different collision energies, enabl…
View article: Single-photon emission associated with double electron capture in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">F</mml:mi></mml:mrow><mml:mrow><mml:mn>9</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:mo>+</mml:mo><mml:mi mathvariant="normal">C</mml:mi></mml:mrow></mml:math>collisions
Single-photon emission associated with double electron capture incollisions Open
Radiative double electron capture (RDEC), the one-step process occurring in ion-atom collisions, has been investigated for bare fluorine ions colliding with carbon. RDEC is completed when two target electrons are captured to a bound state …
View article: Electron- and proton-impact excitation of He-like uranium
Electron- and proton-impact excitation of He-like uranium Open
Synopsis In this contribution, we present an experimental and theoretical study of the proton- and electron- impact excitation effects in helium-like uranium ions in relativistic collisions with different gaseous targets. The experiment wa…