Cooling rates and intensity limitations for laser-cooled ions at relativistic energies

Eidam, Lewin; Winters, D.

doi:10.1016/j.nima.2018.01.038

Cited by 12 publications

(8 citation statements)

References 23 publications

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“…In this regard a commissioning beam-time with Li-like carbon ions at the experimental storage ring (ESR) at the GSI Helmholtz Centre in Darmstadt provided the possibility to test new laser systems and a novel detection system for extreme UV (XUV) photons. The laser systems will be required for laser cooling of bunched relativistic ion beams, as it is being planned for the SIS100 synchrotron at FAIR 1 , 2 . For that purpose, continuous-wave (cw) and pulsed laser systems are developed by groups at the TU Darmstadt 3 and the HZDR/TU Dresden 4 , respectively.…”

Section: Introductionmentioning

confidence: 99%

Laser spectroscopy of the $$^2{\mathrm{S}}_{1/2}{-}^2{\mathrm{P}}_{{1}/2}$$, $$^2{\mathrm{P}}_{3/2}$$ transitions in stored and cooled relativistic C3+ ions

Winzen

Hannen

Bußmann

et al. 2021

Sci Rep

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The $$^2{\mathrm{S}}_{1/2}{-}^2{\mathrm{P}}_{{1}/2}$$ 2 S 1 / 2 - 2 P 1 / 2 and $$^2{\mathrm{S}}_{1/2}{-}^2{\mathrm{P}}_{{3}/2}$$ 2 S 1 / 2 - 2 P 3 / 2 transitions in Li-like carbon ions stored and cooled at a velocity of $$\beta \approx 0.47$$ β ≈ 0.47 in the experimental storage ring (ESR) at the GSI Helmholtz Centre in Darmstadt have been investigated in a laser spectroscopy experiment. Resonance wavelengths were obtained using a new continuous-wave UV laser system and a novel extreme UV (XUV) detection system to detect forward emitted fluorescence photons. The results obtained for the two transitions are compared to existing experimental and theoretical data. A discrepancy found in an earlier laser spectroscopy measurement at the ESR with results from plasma spectroscopy and interferometry has been resolved and agreement between experiment and theory is confirmed.

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Section: Introductionmentioning

confidence: 99%

Laser spectroscopy of the $$^2{\mathrm{S}}_{1/2}{-}^2{\mathrm{P}}_{{1}/2}$$, $$^2{\mathrm{P}}_{3/2}$$ transitions in stored and cooled relativistic C3+ ions

Winzen

Hannen

Bußmann

et al. 2021

Sci Rep

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“…Doppler laser cooling of moving ions was established in the PALLAS experiments [27,28] and has been demonstrated at GSI using RF potentials as a counter force to a single laser system [29]. The amount of detuning required for high Doppler shift raises a challenge for relativistic beams [30,31]. More research and new ideas are needed to find ways to perform 3D cooling of moving ions, to get to the temperatures needed to use these ions for QIS applications.…”

Section: Technical Challengesmentioning

confidence: 99%

Ion Coulomb Crystals in Storage Rings for Quantum Information Science

Brooks¹,

Brown²,

Méot³

et al. 2022

Preprint

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Quantum information science is a growing field that promises to take computing into a new age of higher performance and larger scale computing as well as being capable of solving problems classical computers are incapable of solving. The outstanding issue in practical quantum computing today is scaling up the system while maintaining interconnectivity of the qubits and low error rates in qubit operations to be able to implement error correction and fault-tolerant operations.Trapped ion qubits offer long coherence times that allow error correction. However, error correction algorithms require large numbers of qubits to work properly. We can potentially create many thousands (or more) of qubits with long coherence states in a storage ring. For example, a circular radio-frequency quadrupole, which acts as a large circular ion trap and could enable larger scale quantum computing. Such a Storage Ring Quantum Computer (SRQC) would be a scalable and fault tolerant quantum information system, composed of qubits with very long coherence lifetimes. With computing demands potentially outpacing the supply of high-performance systems, quantum computing could bring innovation and scientific advances to particle physics and other DOE supported programs. Increased support of R&D in large scale ion trap quantum computers would allow the timely exploration of this exciting new scalable quantum computer. The R&D program could start immediately at existing facilities and would include the design and construction of a prototype SRQC. We invite feedback from and collaboration with the particle physics and quantum information science communities.

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“…Yet the most studied and used process parameters are the scanning speed, hatch spacing, laser power, and layer thickness [21][22][23]. Using all the major process parameters, a concept known as volumetric energy density (VED) is employed to examine the physical quantities, such as the melt pool dimensions and microstructures [17,24].…”

Section: Continuous Wave Parametersmentioning

confidence: 99%

A Review: Melt Pool Analysis for Selective Laser Melting with Continuous Wave and Pulse Width Modulated Lasers

Kim

Yun

et al. 2018

Appl. Sci. Converg. Technol.

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Selective laser melting (SLM) is a promising additive manufacturing technique applied to various areas such as aerospace and biomedical industries. Because product characteristics can be controlled by SLM process parameters, several investigations have been conducted to clarify the relationship between process parameters and product characteristics. Melt pool, controlled by process parameters, is a suitable resource to determine the product profile accuracy and mechanical property. Two laser types, continuous wave (CW) and pulse width modulation (PWM), are typically used in SLM processes, and each has distinct advantages depending on the purpose of the process. While CW maintains its power constant, PWM presents a repeated pattern with a pulse width. Herein, the main differences in the process parameters between the two laser types and their effects on the melt pool formation during the SLM process are explained. The results demonstrate that CW and PWM are favorable for dense and fine structures, respectively.

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Cooling rates and intensity limitations for laser-cooled ions at relativistic energies

Cited by 12 publications

References 23 publications

Laser spectroscopy of the $$^2{\mathrm{S}}_{1/2}{-}^2{\mathrm{P}}_{{1}/2}$$, $$^2{\mathrm{P}}_{3/2}$$ transitions in stored and cooled relativistic C3+ ions

Laser spectroscopy of the $$^2{\mathrm{S}}_{1/2}{-}^2{\mathrm{P}}_{{1}/2}$$, $$^2{\mathrm{P}}_{3/2}$$ transitions in stored and cooled relativistic C3+ ions

Ion Coulomb Crystals in Storage Rings for Quantum Information Science

A Review: Melt Pool Analysis for Selective Laser Melting with Continuous Wave and Pulse Width Modulated Lasers

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