Laser-plasma accelerator group

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SEARCH FOR 2-PHOTON PRODUCTION OF RESONANCES DECAYING INTO KKBAR AND KKBAR-PI

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS 29:2 (1985) 189-196

Authors:

M ALTHOFF, W BRAUNSCHWEIG, FJ KIRSCHFINK, HU MARTYN, R ROSSKAMP, H SIEBKE, W WALLRAFF, J EISENMANN, HM FISCHER, H HARTMANN, A JOCKSCH, G KNOP, H KOLANOSKI, H KUCK, V MERTENS, R WEDEMEYER, B FOSTER, A WOOD, E BERNARDI, Y EISENBERG, A ESKREYS, K GATHER, H HULTSCHIG, P JOOS, B KLIMA, H KOWALSKI, A LADAGE, B LOHR, D LUKE, P MATTIG, G MIKENBERG, D NOTZ, D REVEL, D TRINES, T TYMIENIECKA, R WALCZAK, G WOLF, W ZEUNER, E HILGER, T KRACHT, HL KRASEMANN, E LOHRMANN, G POELZ, KU POSNECKER, DM BINNIE, PJ DORNAN, DA GARBUTT, C JENKINS, WG JONES, JK SEDGBEER, D SU, J THOMAS, WATW ABDULLAH, F BARREIRO, L LABARGA, E ROS, MG BOWLER, P BULL, RJ CASHMORE, P DAUNCEY, R DEVENISH, CM HAWKES, G HEATH, DJ MELLOR, SL LLOYD, KW BELL, GE FORDEN, JC HART, DK HASELL, DH SAXON, S BRANDT, M DITTMAR, M HOLDER, G KREUTZ, B NEUMANN, E DUCHOVNI, U KARSHON, A MONTAG, R MIR, E RONAT, G YEKUTIELI, A SHAPIRA, G BARANKO, A CALDWELL, M CHERNEY, M HILDEBRANDT, JM IZEN, M MERMIKIDES, S RITZ, D STROM, M TAKASHIMA, H VENKATARAMANIA, E WICKLUND, SL WU, G ZOBERNIG
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Study of theA-dependence of inclusivep,,Λ and production in π±-Nucleus interactions at 30 GeV/c

Zeitschrift für Physik C Particles and Fields Springer Nature 25:2 (1984) 115-120

Authors:

MG Abreu, T Armstrong, M Baubillier, W Beusch, A Burns, N Erschaidat, J Gago, A Jacholkowski, K Knudson, S Otwinowski, D Perrin, A Palano, M Pimenta, E Quercigh, Z Strachman, M Szeptycka, S Tkaczyk, R Walczak, R Zitoun
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Search for narrow baryonium states near the NN threshold

Nuclear Physics B Elsevier 209:2 (1982) 269-283

Authors:

R Bertini, P Birien, K Braune, G Bruge, W Brückner, H Döbbeling, RW Frey, D Garreta, TJ Ketel, K Kilian, B Mayer, B Pietrzyk, B Povh, M Uhrmacher, Th Walcher, R Walczak, Heidelberg-Saclay Collaboration
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A high power fibre laser for electron beam emittance measurements

Proceedings of IPAC 10 3227-3229

Authors:

L Corner, LJ Nevay, R Walczak

Abstract:

We present the latest results on the development of a high power fibre laser system for a laser-wire measuring electron beam emittance in an ILC-specification environment. The laser consists of a commercial Ytterbium (Yb) doped fibre laser system producing 1μJ pulses at 6.49MHz, which can be locked to an external frequency reference. This output has been amplified in a single 70cm rod type photonic crystal fibre (PCF), producing ~ 100μJ pulses in a burst mode at 2Hz (limited by diagnostics).

Guiding of high-intensity laser pulses in 100mm-long hydrodynamic optical-field-ionized plasma channels

Phys. Rev. Accel. Beams 23 081303-081303

Authors:

A Picksley, A Alejo, J Cowley, N Bourgeois, L Corner, L Feder, J Holloway, H Jones, J Jonnerby, Hm Milchberg, Lr Reid, Aj Ross, R Walczak, SM HOOKER

Abstract:

Hydrodynamic optically-field-ionized (HOFI) plasma channels up to 100mm long are investigated. Optical guiding is demonstrated of laser pulses with a peak input intensity of $6\times10^{17}$ W cm$^{-2}$ through 100mm long plasma channels with on-axis densities measured interferometrically to be as low as $n_{e0} = (1.0\pm0.3)\times10^{17}$cm$^{-3}$. Guiding is also observed at lower axial densities, which are inferred from magneto-hydrodynamic simulations to be approximately $7\times10^{16}$cm$^{-3}$. Measurements of the power attenuation lengths of the channels are shown to be in good agreement with those calculated from the measured transverse electron density profiles. To our knowledge, the plasma channels investigated in this work are the longest, and have the lowest on-axis density, of any free-standing waveguide demonstrated to guide laser pulses with intensities above $>10^{17}$ W cm$^{-2}$.
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