B. Armbruster

TRUMPF (Germany)

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G. Drexlin

Karlsruhe Institute of Technology

B. Zeitnitz

Ruhr University Bochum

J. Kleinfeller

Pierre Auger Observatory

R. Maschuw

Max Planck Institute for Nuclear Physics

V. Eberhard

Karlsruhe University of Education

I.M. Blair

Queen Mary University of London

J.A. Edgington

Queen Mary University of London

T. Jannakos

Karlsruhe University of Education

E. Finckh

Friedrich-Alexander-Universität Erlangen-Nürnberg

K. Eitel

Karlsruhe Institute of Technology

Cooperative Institutions

Karlsruhe Institute of Technology

Friedrich-Alexander-Universität Erlangen-Nürnberg

FZI Research Center for Information Technology

Karlsruhe University of Education

Max Planck Institute for Nuclear Physics

University of Bonn

TRUMPF (Germany)

Universität Hamburg

European Organization for Nuclear Research

Queen Mary University of London

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New experimental limits on νe→ντ oscillations in 2-ν and 3-ν mixing schemes

Physical Review C (1998)

B. Armbruster I.M. Blair B. Bodmann Norman Booth G. Drexlin

The 56 tonne high resolution liquid scintillation calorimeter KARMEN at the beam stop neutrino source ISIS has been used to search for neutrino oscillations in the disappearance channel nu_e->x. The nu_e emitted in mu+ decay at rest are detected with spectroscopic quality via the exclusive charged current reaction 12-C(nu_e,e-)12-N_g.s. almost free of background. Analysis of the spectral shape of e- from the nu_e induced reaction as well as a measurement of the absolute nu_e flux allow to investigate oscillations of the type nu_e->nu_tau and nu_e->nu_mu . The flux independent ratio R(CC/NC) of charged current events 12-C(nu_e,e-)12-N_g.s. to neutral current events 12-C(nu,nu')12-C* provides additional information in the oscillation channel nu_e->x . All three analysis methods show no evidence for oscillations. For the nu_e->nu_tau channel 90%CL limits of sin^2(2t)<0.338 for dm^2>100eV^2 and dm^2<0.77eV^2 for maximal mixing in a simple 2 flavor oscillation formalism are derived. A complete 3 flavor analysis of the experimental data from five years of measurement with respect to nu_enu_tau and nu_enu_mu mixing is presented.

10.1103/physrevc.57.3414

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Citations (64)

KARMEN upgrade and prospects at ESS

Progress in Particle and Nuclear Physics (1998)

G. Drexlin B. Armbruster V. Eberhard K. Eitel H. Gemmeke

Upgrade

Veto

Oscillation (cell signaling)

Spallation Neutron Source

10.1016/s0146-6410(98)00025-8

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Citations (18)

Limits on neutrino oscillations in the appearance channels vμ → ve and vμ → ve

Nuclear Physics B - Proceedings Supplements (1995)

B. Armbruster B. E. J. Bodmann I.M. Blair N. E. Booth A.C. Dodd

Spallation Neutron Source

10.1016/0920-5632(94)00752-h

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Citations (15)

Improved Limits onν¯eEmission fromμ+Decay

Physical Review Letters (2003)

B. Armbruster G. Drexlin K. Eitel T. Jannakos J. Kleinfeller

We investigated mu(+) decays at rest produced at the ISIS beam stop target. Lepton flavor (LF) conservation has been tested by searching for nu(e) via the detection reaction p(nu(e),e(+))n. No nu(e) signal from LF violating mu(+) decays was identified. We extract upper limits of the branching ratio (BR) for the LF violating decay mu(+)-->e(+)+nu(e)+nu(-) compared to the standard model (SM) mu(+)-->e(+)+nu(e)+nu(mu) decay: BR<0.9(1.7) x 10(-3) (90% C.L.) depending on the spectral distribution of nu(e) characterized by the Michel parameter rho=0.75(0.0). These results improve earlier limits by one order of magnitude and restrict extensions of the SM in which nu(e) emission from mu(+) decay is allowed with considerable strength. The decay mu(+)-->e(+)+nu(e)+nu(mu) often proposed as a potential source for the nu(e) signal observed in the LSND experiment can be excluded.

Branching fraction

10.1103/physrevlett.90.181804

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Citations (18)

Latest developments in high brightness diode lasers and their applications

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE (2013)

W. Sokolowski Alexander Hangst M. Buehler Alexander Killi Tracey Ryba

Within the past couple of years one can see a general trend in high power diode lasers among others towards the highest possible brightness. The product portfolio of TRUMPF high brightness diode lasers with output power < 1kW will be presented. The architecture of these diode lasers, their main specifications as well as the main features of the control unit are shown. Some examples of the applications of these lasers in such advanced material processing techniques as welding of plastics and welding of thin metal sheets is also presented.

10.1117/12.2003659

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Citations (2)

Study of a water Cherenkov detector for low energy v-e scattering

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment (1995)

B. Armbruster G. Drexlin V. Eberhard H. Gemmeke B. Zeitnitz

Cherenkov detector

10.1016/0168-9002(95)00108-5

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Anomaly in the time distribution of neutrinos from a pulsed beam stop source

Physics Letters B (1995)