Observation of the topological Aharonov-Casher phase shift by neutron interferometry.
The phase shift predicted by Aharonov and Casher for a magnetic dipole diffracting around a charged electrode has been observed for the case of thermal neutrons, using a neutron interferometer containing a 30-kV/mm vacuum electrode system. The judicious use of the Earth's gravitational field introduces a spin-independent phase shift which enables unpolarized neutrons to be used. A supplementary magnetic bias field of the correct magnitude allows first-order sensitivity to be achieved; even so, the theoretically predicted phase shift is only 1.50 mrad for the geometry and conditions of the experiment. We observe a phase shift of 2.19\ifmmode\pm\else\textpm\fi{}0.52 mrad.

title: Neutron interferometric search for quaternions in quantum mechanics
abstract: En suivant une proposition d'Asher Peres, on realise une experience d'interferometrie de neutrons, en cherchant des contributions non communicatives de quaternions a l'amplitude de diffusion neutron-noyau. En utilisant des barreaux de Ti et Al, on trouve que les dephasages subis par un des faisceaux de l'interferometre est invariant quand on echange les 2 barres (a une precision de 1 pour 30000)

title: Summary of experience with industrial superconducting main magnet production for HERA
abstract: For HERA (Hadron Electron Ring Accelerator) a total of 453 superconducting dipoles and 246 superconducting quadrupoles has been built by European industry. During the first stage of the fabrication period several technical improvements turned out to be necessary. All magnets have been carefully checked mechanically, optically, and electrically, and have been cold-tested at DESY. The result of these checks gives a good overview of the fabrication quality and gives hints for possible improvements for future superconducting accelerator magnet fabrication. The reproducibility achieved during mass production is very high. The rejection rate for nonconformity with specification was 7.2% overall.

title: Hydroforming of seamless niobium cavity of tesla shape

title: Length saving in TESLA structure by relocation of tuner

title: Photo induced depopulation of the Ta-180m isomer via low lying intermediate states: Structure and astrophysical implications

title: Primordial spectral indices from generalized Einstein theories.
abstract: Primordial spectral indices are calculated to second order in slow-roll parameters for three closely related models of inflation, all of which contain a scalar field nonminimally coupled to the Ricci curvature scalar. In most cases, ${\mathit{n}}_{\mathit{s}}$ may be written as a function of the nonminimal curvature coupling strength \ensuremath{\xi} alone, with ${\mathit{n}}_{\mathit{s}}$(\ensuremath{\xi})\ensuremath{\le}1, although the constraints on \ensuremath{\xi} differ greatly between ``new inflation'' and ``chaotic inflation'' initial conditions. Under ``new inflation'' initial conditions, there are discrepancies between the values of ${\mathit{n}}_{\mathit{s}}$ as calculated in the Einstein frame and the Jordan frame. The sources for these discrepancies are addressed, and shown to have negligible effects on the numerical predictions for ${\mathit{n}}_{\mathit{s}}$. No such discrepancies affect the calculations under ``chaotic inflation'' initial conditions.