17 research outputs found
Comment on "Missing Transverse-Doppler Effect in Time-Dilation Experiments with High-Speed Ions"
In an article "Missing Transverse-Doppler Effect in Time-Dilation Experiments
with High-Speed Ions" by S. Devasia [arXiv:1003.2970v1], our recent Doppler
shift experiments on fast ion beams are reanalyzed. Contrary to our analysis,
Devasia concludes that our results provide an "indication of Lorentz
violation". We argue that this conclusion is based on a fundamental
misunderstanding of our experimental scheme and reiterate that our results are
in excellent agreement with Special Relativity
Wagenumlaufplanung im oeffentlichen Personennahverkehr mit Hilfe der interaktiven Rechentechnik Schlussbericht
TIB: AC 7320 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman
Polarization-dependent disappearance of a resonance signal: Indication for optical pumping in a storage ring?
We report on laser spectroscopic measurements on Li ions in the
experimental storage ring ESR at the GSI Helmholtz Centre for Heavy Ion
Research. Driving the 2s\,^3\!{S}_1\;(F=\frac{3}{2})
\,\leftrightarrow\,2p\,^3\!P_2\;(F=\frac{5}{2}) \leftrightarrow
2s\,^3\!{S}_1\;(F=\frac{5}{2}) -transition in Li with two
superimposed laser beams it was found that the use of circularly polarized
light leads to a disappearance of the resonance structure in the fluorescence
signal. This can be explained by optical pumping into a dark state of polarized
ions. We present a detailed theoretical analysis of this process that supports
the interpretation of optical pumping and demonstrates that the polarization
induced by the laser light must then be at least partially maintained during
the round trip of the ions in the storage ring. Such polarized ion beams in
storage rings will provide opportunities for new experiments, especially on
parity violation.Comment: 14 pages, 8 figures, new version with small adjustments, closest to
final publication in PRA