Search Results - "WITTE, K. J"

Influence of the laser prepulse on proton acceleration in thin-foil experiments by KALUZA, M, SCHREIBER, J, SANTALA, M. I. K, TSAKIRIS, G. D, EIDMANN, K, MEYER-TER-VEHN, J, WITTE, K. J

“…We investigate the influence of the laser prepulse due to amplified spontaneous emission on the acceleration of protons in thin-foil experiments. We show that…”
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Observation of superradiant amplification of ultrashort laser pulses in a plasma by DREHER, M, TAKAHASHI, E, MEYER-TER-VEHN, J, WITTE, K.-J

“…We demonstrate the amplification of a femtosecond signal pulse in an underdense plasma by a novel mechanism called superradiant amplification. The pulse is…”
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Multi-MeV Electron Beam Generation by Direct Laser Acceleration in High-Density Plasma Channels by Gahn, C., Tsakiris, G. D., Pukhov, A., Meyer-ter-Vehn, J., Pretzler, G., Thirolf, P., Habs, D., Witte, K. J.

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Generating positrons with femtosecond-laser pulses by Gahn, C., Tsakiris, G. D., Pretzler, G., Witte, K. J., Delfin, C., Wahlström, C.-G., Habs, D.

“…Utilizing a femtosecond table-top laser system, we have succeeded in converting via electron acceleration in a plasma channel, low-energy photons into…”
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Frequency doubling of multi-terawatt femtosecond pulses by MARCINKEVICIUS, A, TOMMASINI, R, TSAKIRIS, G. D, WITTE, K. J, GAIZAUSKAS, E, TEUBNER, U

“…We present an experimental and theoretical study of the influence of the spatial beam quality (fluence and phase distributions) on the second-harmonic…”
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Time-sequence imaging of relativistic laser–plasma interactions using a novel two-color probe pulse by Kaluza, M. C., Santala, M. I. K., Schreiber, J., Tsakiris, G. D., Witte, K. J.

“…We describe and demonstrate a novel experimental technique to record two picosecond-separated images of the evolution of a single-shot laser-produced plasma…”
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Advances in friction stir welding by separate control of shoulder and probe by Grätzel, M., Sieber, F., Schick-Witte, K. J., Bergmann, J. P.

“…Friction stir welding (FSW) has developed into a reliable and increasing used industrial joining technology. Various tool configurations can be used for FSW,…”
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Relativistic self-focusing of fs-laser pulses and their heating effect on the preformed plasma by Kaluza, M., Foldes, I.B., Racz, E., Santala, M.I.K., Tsakiris, G.D., Witte, K.-J.

“…Experiments in the context of fast ignition were carried out by focusing a 6-TW laser beam into a preformed plasma. An electron population with a…”
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Radiation induced gas-dynamic refractive index changes in an iodine laser oscillator by Witte, K.J.

“…Due to the exothermic recombination of ground state iodine atoms I with free radicals C/sub 3/F/sub 7/ to the parent molecule C/sub 3/F/sub 7/I, the gaseous…”
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Efficient stimulated Brillouin backscattering of multiple pulses in the highly transient regime by GREINER-MOTHES, M. A, WITTE, K. J

“…Stimulated Brillouin scattering in the highly transient regime is experimentally investigated using a multipulse reflection scheme. In high pressure N2 and SF6…”
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Neutron production by 200 mJ ultrashort laser pulses by Pretzler, G., Saemann, A., Pukhov, A., Rudolph, D., Schätz, T., Schramm, U., Thirolf, P., Habs, D., Eidmann, K., Tsakiris, G. D., Meyer-ter-Vehn, J., Witte, K. J.

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Theoretical analysis of a Brillouin switch for amplifier decoupling and prepulse suppression in short-pulse high-power laser systems by Witte, K. J., Greiner-Mothes, M. A.

“…A switch suited for high-power amplifier chains emitting nanosecond pulses is theoretically investigated. It is based on a two-step Brillouin backscattering…”
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High power pulsed gas lasers by WITTE, K. J

“…The physical characteristics of three pulsed laser systems to be used as drivers for fusion reactors are described. The specific systems discussed include a…”
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MeV γ-ray yield from solid targets irradiated with fs-laser pulses by Gahn, C., Pretzler, G., Saemann, A., Tsakiris, G. D., Witte, K. J., Gassmann, D., Schätz, T., Schramm, U., Thirolf, P., Habs, D.

“…We have investigated the MeV bremsstrahlung which is emitted when fast electrons generated by the interaction of 200 mJ, 130 fs Ti:sapphire laser pulses with a…”
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Layout and performance of the Asterix IV iodine laser at MPQ, Garching by Baumhacker, H., Brederlow, G., Fill, E., Volk, R., Witkowski, S., Witte, K. J.

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Observation of Solitary Waves with Different Phase Behavior in Stimulated Raman Forward Scattering by Grabtchikov, A. S., Gakhovich, D. E., Shvedko, A. G., Orlovich, V. A., Witte, K. J.

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The asterix III pulsed high-power iodine laser by Brederlow, G., Witte, K., Fill, E., Hohla, K., Volk, R.

“…A system description and first results of the Asterix III high-power iodine laser built at IPP Garching are given. This laser is designed to yield an output…”
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Generation of smooth nanosecond iodine laser pulses by excimer laser pumping by Fill, E., Skrlac, W., Witte, K.-J.

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Angular chirp and tilted light pulses in CPA lasers by Pretzler, G., Kasper, A., Witte, K.J.

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Theoretical analysis of the performance of an atomic iodine laser amplifier chain by Uchiyama, T., Witte, K.

“…The performance of an atomic iodine laser amplifier chain with output pulse powers close to 2 TW is analyzed by a numerical solution of the Maxwell-Bloch…”
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