Heavy-ion storage rings and their use in precision experiments with highly charged ions

Steck, M.; Litvinov, Yuri A.

doi:10.1016/j.ppnp.2020.103811

Cited by 56 publications

(24 citation statements)

References 334 publications

(499 reference statements)

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“…Any product of a charge-changing (atomic or nuclear) reaction will be deflected differently by the dipole magnets as the primary beam and can thus be intercepted by a particle detector. It should be emphasized that all tools developed at various storage rings [361,362] can be available here as well, which allow, for example, to prepare the beam in a specific, well-defined atomic or nuclear state by employing internal targets or dedicated laser beams.…”

Section: Photophysics With a Storage Ring For Radioisotopesmentioning

confidence: 99%

Expanding Nuclear Physics Horizons with the Gamma Factory

Budker,

Berengut,

Flambaum

et al. 2021

Preprint

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The Gamma Factory (GF) is an ambitious proposal, currently explored within the CERN Physics Beyond Colliders program, for a source of photons with energies up to ≈ 400 MeV and photon fluxes (up to ≈ 10 17 photons per second) exceeding those of the currently available gamma sources by orders of magnitude. The high-energy (secondary) photons are produced via resonant scattering of the primary laser photons by highly relativistic partially-stripped ions circulating in the accelerator. The secondary photons are emitted in a narrow cone and the energy of the beam can be monochromatized, eventually down to the ≈ 1 ppm level, via collimation, at the expense of the photon flux. This paper surveys the new opportunities that may be afforded by the GF in nuclear physics and related fields. CONTENTS 11.2. Photon Splitting 48 11.3. Photon Scattering 48 12. Nuclear physics with tertiary beams 49 12.1. Tertiary beams at the GF 49 12.2. Polarized electron, positron and muon sources 49 12.3. High-purity neutrino beams 50 12.4. Neutron and radioactive ion sources 50 12.5. Production of monoenergetic fast neutrons 51 12.6. Metrology with keV neutrons 51 13. Nuclear physics opportunities at the SPS 51 14. Speculative ideas and open questions 51 14.1. Applying the Gamma Factory ideas at other facilities 51 14.2. Nuclear waste transmutation 52 14.3. Laser polarization of PSI 52 14.4. Quark-gluon plasma with polarized PSI 52 14.5. Ground-state hyperfine-structure transitions in PSI 52 14.6. Detection of gravitational waves 53 15. Conclusions and optimistic outlook 53 Acknowledgments 53 Appendix 54 A. Survey of existing and forthcoming gamma facilities 54

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Section: Photophysics With a Storage Ring For Radioisotopesmentioning

confidence: 99%

Expanding Nuclear Physics Horizons with the Gamma Factory

Budker,

Berengut,

Flambaum

et al. 2021

Preprint

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“…Atomic energy levels of highly charged ions (HCIs) are ideal systems for testing the quantum electrodynamics (QED) and relativistic effects [1,2]. Electron-beam ion traps [3][4][5] and heavy-ion storage rings [6][7][8] offer unique opportunities for precision studies with HCI. In particular, heavy-ion storage rings equipped with an electron cooler serve as ideal platforms for electron-ion mergedbeams experiments.…”

Section: Introductionmentioning

confidence: 99%

Precise determination of the 2s22p5-2s2p6 transition energy in fluorine-like nickel utilizing a low-lying dielectronic resonance

Wang,

Huang,

Wen

et al. 2022

Preprint

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High precision spectroscopy of the low-lying dielectronic resonances in fluorine-like Ni 19+ ions was studied by employing the electron-ion merged-beams method at the heavy-ion storage ring CSRm. The measured dielectronic-recombination (DR) resonances are identified by comparison with relativistic calculations utilizing the flexible atomic code (FAC). The lowest-energy resonance at about 86 meV is due to DR via (2s2p 6 [ 2 S 1/2 ]6s)J=1 intermediate state. The position of this resonance could be determined within an experimental uncertainty of as low as ±4 meV. The binding energy of the 6s Rydberg electron in the resonance state was calculated using two different approaches, the Multi-Configurational Dirac-Hartree-Fock (MCDHF) method and the Stabilization Method (SM). The sum of the experimental (2s2p 6 [ 2 S 1/2 ]6s)J=1 resonance energy and the theoretical 6s binding energies from the MCDHF and SM calculations, yields the following values for the 2s 2 2p 5 2 P 3/2 → 2s2p 6 2 S 1/2 transition energy149.056(4)exp(20) theo and 149.032(4)exp(6) theo , respectively. The theoretical calculations reveal that second-order QED and third-order correlation effects contribute by together about 0.1 eV to the total transition energy and can, thus, be assessed by the present precision DR spectroscopic measurement.

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“…Isochronous mass spectrometry (IMS) of heavy-ion storage rings plays an important role in the mass measurements of short-lived nuclei [1,2]. There are three storage ring facilities that conduct such experiments worldwide [3][4][5][6], namely, the experimental cooler-storage ring (CSRe) in Lanzhou, China; the experimental storage ring (ESR) in Darmstadt, Germany; and the Rare-RI Ring (R3) in Saitama, Japan. In IMS experiments, the nuclei of interest are produced in projectile fragmentation (PF) or in in-flight fission nuclear reactions, where the production cross sections are related to the binding energies of the fragments [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…For a recent review, the reader is referred to Refs. [5,6,27] and the references cited therein. In these experiments, the ions were identified almost solely through their m/q ratios by comparing the revolution time spectrum obtained experimentally with the simulated one [14,15].…”

Section: Introductionmentioning

confidence: 99%

Charge resolution in the isochronous mass spectrometry and the mass of $$^{51}$$Co

et al. 2021

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Isochronous mass spectrometry (IMS) of heavyion storage rings is a powerful tool for the mass measurements of short-lived nuclei. In IMS experiments, masses are determined through precision measurements of the revolution times of the ions stored in the ring. However, the revolution times cannot be resolved for particles with nearly the same mass-to-charge (m/q) ratios. To overcome this limitation and to extract the accurate revolution times for such pairs of ion species with very close m/q ratios, in our early work on particle identification, we analyzed the amplitudes of the timing signals from the detector based on the emission of secondary electrons. Here, the previous data analysis method is further improved by considering the signal amplitudes, detection efficiencies, and number of stored ions in the ring. A sensitive Z-dependent parameter is introduced in the data analysis, leading to a better resolution of 34 Ar 18þ and 51 Co 27þ with A=Z ¼ 17=9. The mean revolution times of 34 Ar 18þ and 51 Co 27þ are deduced, although their time difference is merely 1.8 ps. The uncorrected, overlapped peak of these ions has a full width at half maximum of 7.7 ps. The mass excess of 51 Co was determined to be À27;332ð41Þ keV, which is in agreement with the previous value of À27;342ð48Þ keV.

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Heavy-ion storage rings and their use in precision experiments with highly charged ions

Cited by 56 publications

References 334 publications

Expanding Nuclear Physics Horizons with the Gamma Factory

Expanding Nuclear Physics Horizons with the Gamma Factory

Precise determination of the 2s22p5-2s2p6 transition energy in fluorine-like nickel utilizing a low-lying dielectronic resonance

Charge resolution in the isochronous mass spectrometry and the mass of $$^{51}$$Co

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