A test of special relativity with stored lithium ions

Grieser, R.; Klein, Richard; Huber, G.; Dickopf, S.; Klaft, I.; Knobloch, P.; Merz, P.; Albrecht, Florian; Grieser, M.; Habs, D.; Schwalm, D.; Kühl, T.

doi:10.1007/bf01081163

Cited by 44 publications

(18 citation statements)

References 24 publications

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“…In a preferred frame Σ (usually the cosmic microwave background), the speed of light c 0 =const. In a frame S moving with the velocity v with respect to Σ, c/c [18]. KT experiments test velocity invariance of c, using the periodic modulation of v provided by Earth's orbit [6] or rotation [17].…”

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confidence: 99%

Modern Michelson-Morley Experiment using Cryogenic Optical Resonators

et al. 2003

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We report on a new test of Lorentz invariance performed by comparing the resonance frequencies of two orthogonal cryogenic optical resonators subject to Earth's rotation over ∼ 1 year. For a possible anisotropy of the speed of light c, we obtain ∆ θ c/c0 = (2.6 ± 1.7) · 10 −15 . Within the RobertsonMansouri-Sexl test theory, this implies an isotropy violation parameter β −δ− 1 2 = (−2.2±1.5)·10−9 , about three times lower than the best previous result. Within the general extension of the standard model of particle physics, we extract limits on 7 parameters at accuracies down to 10 −15 , improving the best previous result by about two orders of magnitude.

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confidence: 99%

Modern Michelson-Morley Experiment using Cryogenic Optical Resonators

et al. 2003

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“…A first version of this experiment that employed collinear optical-optical double-resonance spectroscopy on a Λ-type three-level system formed by the Fig. 2, has set the thitherto best absolute bound of a j j < 8 Â 10 À7 [12]. The limiting factor was the large observed linewidth of the Λ-resonance of almost 60 MHz, compared to a natural width of 3.8 MHz.…”

Section: A Modern Ives-stilwell Experiments At the Tsrmentioning

confidence: 99%

Experimental test of special relativity by laser spectroscopy

et al. 2006

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The Doppler-free laser-spectroscopic frequency measurement of Doppler-shifted optical lines in forward and backward direction of a fast ion beam permits a sensitive test of the relativistic Doppler-formula and, hence, the relativistic time dilation factor γ SR ¼ ð1 À ν 2 c 2 Á À1=2 . An experiment on metastable 7 Li + , stored at a velocity of v= 0.064c in the Heidelberg heavy-ion storage ring TSR, has confirmed time dilation with unprecedented accuracy. Latest tests at two different ion-velocities (v=0.03c and v=0.064c) will enhance these measurements. An improved version of this experiment will be carried out at the experimental storage ring (ESR) at the Gesellschaft für Schwerionenforschung (GSI) in Darmstadt. The ESR permits 7 Li + to be stored at v=0.33c which promises an improvement of the sensitivity to deviations from γ SR by an order of magnitude. A first test at the ESR has shown the feasibility for this kind of experiment.Key words precision spectroscopy . test of Lorentz invariance . storage ring . generation of metastabile lithium ions

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“…The hyperfine structure of the 3 S 1 state is almost two orders of magnitude larger than the 2-3 GHz line width associated with longitudinal momentum spread in the storage ring. Previous work at the TSR has studied the analogue transitions in the lithium ion [45]. The light collection region will require minor modification for deep UV but would essentially follow the same design.…”

Section: In-ring Laser Spectroscopy Of Neutron-rich Oxygen With the Tsrmentioning

confidence: 99%

“…The application of DR of few-electron ions to nuclear ground state properties was pioneered at the ESR and TSR. Figures 7 and 8 show two remarkable examples of an isotope shift experiment with stable three-electron Nd ions ( A Nd 57+ , A=142, 150) [137] and a hyperfine splitting study of 45 Sc 18+ [139], respectively, in order to visualize the potential of the technique. The latter experiment was carried out at the ultra-cold target station of the TSR storage ring and benefitted from its unprecedented experimental performance.…”

Section: Di-electronic Recombination On Exotic Nucleimentioning

confidence: 99%

Storage ring at HIE-ISOLDE

Grieser

Litvinov

Raabe

et al. 2012

Eur. Phys. J. Spec. Top.

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113

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We propose to install a storage ring at an ISOL-type radioactive beam facility for the first time. Specifically, we intend to install the heavy-ion, low-energy ring TSR at the HIE-ISOLDE facility in CERN, Geneva. Such a facility will provide a capability for experiments with stored secondary beams that is unique in the world. The envisaged physics programme is rich and varied, spanning from investigations of nuclear groundstate properties and reaction studies of astrophysical relevance, to investigations with highly-charged ions and pure isomeric beams. The TSR can also be used to remove isobaric contaminants from stored ion beams and for systematic studies within the neutrino beam programme. In addition to experiments performed using beams recirculating within the ring, cooled beams can also be extracted and exploited by external spectrometers for high-precision measurements. The existing TSR, which is presently in operation at the Max-Planck Institute for Nuclear Physics in Heidelberg, is well-suited and can be employed for this purpose. The physics cases, technical details of the existing ring facility and of the beam requirements at HIE-ISOLDE, together with the cost, time and manpower estimates for the transfer, installation and commissioning of the TSR at ISOLDE are discussed in the present technical design report.

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A test of special relativity with stored lithium ions

Cited by 44 publications

References 24 publications

Modern Michelson-Morley Experiment using Cryogenic Optical Resonators

Modern Michelson-Morley Experiment using Cryogenic Optical Resonators

Experimental test of special relativity by laser spectroscopy

Storage ring at HIE-ISOLDE

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