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Wyszukujesz frazę "Krause, H.-J." wg kryterium: Autor


Tytuł:
How to reach a thousand-second in-plane polarization lifetime with 0.97−GeV/c deuterons in a storage ring
Autorzy:
Eversmann, D.
Bernreuther, W.
Mey, S.
Simon, M.
Zakrzewska, M.
Hahnraths, T.
Kamys, Bogusław
Valetov, E.
Hölscher, D.
Mchedlishvili, D.
Chiladze, D.
Hejny, V.
Rathmann, F.
Wilkin, C.
Khoukaz, A.
Chekmenev, S.
Guidoboni, G.
Rosenthal, M.
Uzikov, Yu.
Trinkel, F.
Makino, K.
Natour, G.
Sefzick, T.
Statera, M.
Orlov, Y.
Tabidze, M.
Engels, R.
Gaisser, M.
Wrońska, Aleksandra
Andrianov, S.
Bagdasarian, Z.
Glückler, H.
Thörngren Engblom, P.
Pesce, A.
Kacharava, A.
Nowakowski, Krzysztof
Maanen, P.
Magiera, Andrzej
Wüstner, P.
Stockhorst, H.
Böhme, C.
Esser, F. M.
Goldenbaum, F.
Müller, F.
Soltner, H.
Hempelmann, N.
Heberling, D.
Dymov, S.
Slim, J.
Koop, I.
Zuprański, P.
Lenisa, P.
Mariański, B.
Bai, M.
Bertelli, S.
Nass, A.
Trzciński, A.
Pretz, J.
Ritman, J.
Bsaisou, J.
Grzonka, D.
Lorentz, B.
Grigoryev, K.
Weidemann, C.
Kamerdzhiev, V.
Berz, M.
Hetzel, J.
Saleev, A.
Lomidze, N.
Maier, R.
Krewald, S.
Shmakova, V.
Zyuzin, D.
Meißner, Ulf-G.
Keshelashvili, I.
Krause, H.-J.
Morse, W.
de Conto, J.-M.
Stassen, R.
Contalbrigo, M.
Senichev, Y.
Hipple, R.
Kulikov, A.
Stephenson, E.
Rudy, Zbigniew
Ivanov, A.
Felden, O.
Baylac, M.
Semertzidis, Y.
Ciullo, G.
Hinder, F.
Vassiliev, A.
Nikolaev, N.
Talman, R.
Nioradze, M.
Böker, J.
Ströher, H.
Straatmann, H.
Silenko, A.
Valdau, Yu.
Lehrach, A.
Macharashvili, G.
Prasuhn, D.
Augustyniak, W.
Stahl, A.
Gebel, R.
Opis:
We observe a deuteron beam polarization lifetime near 1000 s in the horizontal plane of a magnetic storage ring (COSY). This long spin coherence time is maintained through a combination of beam bunching, electron cooling, sextupole field corrections, and the suppression of collective effects through beam current limits. This record lifetime is required for a storage ring search for an intrinsic electric dipole moment on the deuteron at a statistical sensitivity level approaching 10^{-29} e cm.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
The Temperature and Pressure Dependence of the Free Volume in Fluoroelastomers from PALS and PVT Experiments
Autorzy:
Dlubek, G.
Sen Gupta, A.
Wawryszczuk, J.
Kilburn, D.
Pionteck, J.
Krause-Rehberg, R.
Goworek, T.
Alam, M. A.
Kaspar, H.
Lochhaas, K. H.
Tematy:
61.41.+e
78.70.-g
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/2042202.pdf  Link otwiera się w nowym oknie
Opis:
Positron lifetime and pressure-volume-temperature experiments were performed as function of T (100-485 K) and P (10$\text{}^{-5}$ Pa-500 MPa) on a fluoroelastomer. From positron annihilation lifetime spectroscopy, analyzed with LT9.0 assuming a dispersion in the e$\text{}^{+}$ (τ$\text{}_{2}$) and o-Ps (τ$\text{}_{3}$) lifetime, the mean, 〈v$\text{}_{h}$〉, and the width (standard deviation), σ$\text{}_{h}$, of the hole size distribution were calculated. The pressure-volume-temperature data were analyzed using the Simha-Somcynsky hole-lattice theory to estimate the specific hole free volume V$\text{}_{f}$. From a comparison of V$\text{}_{f}$ with 〈v$\text{}_{h}$〉 the specific hole number, N'$\text{}_{h}$, is estimated. The data from thermal expansion and pressure experiments show complete agreement when taking into account the compressibility of the occupied volume.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection of magnetic fields in the circumgalactic medium of nearby galaxies using Faraday rotation
Autorzy:
Bomans, D. J.
Heesen, V.
Basu, A.
O'Sullivan, S. P.
Paladino, R.
Chyży, Krzysztof
Krause, M. G. H.
Dettmar, R. -J.
Carretti, E.
Haverkorn, M.
Heald, G. H.
Beck, R.
Seta, A.
Bracco, A.
Stein, M.
Hutschenreuter, S.
Brüggen, M.
Horellou, C.
Opis:
Context. The existence of magnetic fields in the circumgalactic medium (CGM) is largely unconstrained. Their detection is important as magnetic fields can have a significant impact on the evolution of the CGM, and, in turn, the fields can serve as tracers for dynamical processes in the CGM. Aims. Using the Faraday rotation of polarised background sources, we aim to detect a possible excess of the rotation measure in the surrounding area of nearby galaxies. Methods. We used 2461 residual rotation measures (RRMs) observed with the LOw Frequency ARray (LOFAR), where the foreground contribution from the Milky Way is subtracted. The RRMs were then studied around a subset of 183 nearby galaxies that was selected by apparent B-band magnitude. Results. We find that, in general, the RRMs show no significant excess for small impact parameters (i.e., the perpendicular distance to the line of sight). However, if we only consider galaxies at higher inclination angles and sightlines that pass close to the minor axis of the galaxies, we find significant excess at impact parameters of less than 100 kpc. The excess in |RRM| is 3.7 rad m$^{-2}$ with an uncertainty between ±0.9 rad m$^{-2}$ and ±1.3 rad m$^{-2}$ depending on the statistical properties of the background (2.8σ–4.1σ). With electron densities of ∼ 10$^{-4}$ cm$^{-3}$, this suggests magnetic field strengths of a few tenths of a microgauss. Conclusions. Our results suggest a slow decrease in the magnetic field strength with distance from the galactic disc, as expected if the CGM is magnetised by galactic winds and outflows.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł

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