J. W. Kovermann

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Autonomous robots are becoming essential for a vast range of applications ranging from inspection to manipulation, often used for unstructured and harsh environments. Navigation sensors are part of the framework needed to operate such robots. In this paper a novel range finder sensor based on Time-Of-Flight technology is presented, this being suitable for(More)
An experiment (E166) at the Stanford Linear Accelerator Center has demonstrated a scheme in which a multi-GeV electron beam passed through a helical undulator to generate multi-MeV, circularly polarized photons which were then converted in a thin target to produce positrons (and electrons) with longitudinal polarization above 80% at 6 MeV. The results are(More)
A proof-of-principle experiment has been carried out in the Final Focus Test Beam (FFTB) at SLAC to demonstrate production of polarized positrons in a manner suitable for implementation at the ILC. A helical undulator of 2.54 mm period and 1-m length produced circularly polarized photons of first harmonic endpoint energy of 8 MeV when traversed by a 46.6(More)
Full exploitation of the physics potential of a future International Linear Collider will require the use of polarized electron and positron beams. Experiment E166 at the Stanford Linear Accelerator Center (SLAC) has demonstrated a scheme in which an electron beam passes through a helical undulator to generate photons (whose first-harmonic spectrum extended(More)
A new klystron based X-band rf power source operating at 11.994 GHz has been installed and started to be commissioned at CERN in collaboration with CEA Saclay and SLAC for CLIC accelerating structure tests. The system comprises a solid state high voltage modulator, an XL5 klystron developed by SLAC, a cavity based SLED type pulse compressor, the necessary(More)
A longitudinal polarized positron beam is foreseen for the international linear collider (ILC). A proof-of-principle experiment has been performed in the final focus test beam at SLAC to demonstrate the production of polarized positrons for implementation at the ILC. The E166 experiment uses a 1 m long helical undulator in a 46.6 GeV electron beam to(More)
G. Alexander, J. Barley, Y. Batygin, S. Berridge, V. Bharadwaj, G. Bower, W. Bugg, F.-J. Decker, R. Dollan, Y. Efremenko, V. Gharibyan, C. Hast, R. Iverson, H. Kolanoski, J. Kovermann, K. Laihem, T. Lohse, K.T. McDonald, A.A. Mikhailichenko, G.A. Moortgat-Pick, P. Pahl, R. Pitthan, R. Pöschl, E. Reinherz-Aronis, S. Riemann, A. Schälicke, K.P. Schüler, T.(More)
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