Autor: Otte, P. - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Verification of electromagnetic calorimeter concept for the HADES spectrometer
Autorzy:: Koenig, W.
Rodríguez-Ramos, P.
Galatyuk, T.
Pietraszko, J.
Sobolev, Y. G.
Guber, F.
Czyžycki, W.
Otte, P.
Blume, C.
Petukhov
Golubeva, M.
Kardan, B.
Lapidus, K.
Fabbietti, L.
Kajetanowic, M.
Thomas, A.
Lisowski, E.
Linev, S.
Epple, E.
Skott, P.
Kugler, A.
Ott, P.
Reshetin, A.
Salabura, Piotr
Svoboda, O.
Rost, A.
Steffen, O.
Traxler, M.
Tlustý, P.
Ivashkin, A.
Hlaváč, S.
Opis:: The HADES spectrometer currently operating on the beam of SIS18 accelerator in GSI will be moved to a new position in the CBM cave of the future FAIR complex. Electromagnetic calorimeter (ECAL) will enable the HADES@FAIR experiment to measure data on neutral meson production in heavy ion collisions at the energy range of 2-10 A GeVon the beam of the new accelerator SIS100. Calorimeter will be based on 978 massive lead glass modules read out by photomultipliers and a novel front-end electronics. Secondary gamma beam with energies ranging from 81 MeV up to 1399 MeV from MAMI-C Mainz facility was used to verify selected technical solutions. Relative energy resolution was measured using modules with three different types of photomultipliers. Two types of developed front-end electronics as well as energy leakage between neighbouring modules under parallel and declined gamma beams were studied in detail.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

Inne

na półce

Skocz do pozycji: 2.

Tytuł:: From barren substrate to mature tundra - lichen colonization in the forelands of Svalbard glaciers
Autorzy:: Wietrzyk-Pelka, P.
Otte, V.
Wegrzyn, M.H.
Olech, M.
Wydawca:: Polskie Towarzystwo Botaniczne
Powiązania:: https://bibliotekanauki.pl/articles/58682.pdf Link otwiera się w nowym oknie
Opis:: This paper contributes to studies on the lichen biota of Arctic regions. The research was carried out in the forelands of eight glaciers and in the mature tundra surrounding them. Study areas were located in two parts of Svalbard: in the Kongsfjord (forelands of Austre Brøggerbreen, Vestre Brøggerbreen, Austre Lovénbreen, Midtre Lovénbreen, and Vestre Lovénbreen) and in the Isfjord (forelands of Rieperbreen, Svenbreen, and Ferdinandbreen). In each foreland and in the mature tundra surrounding it, a series of 1-m² plots was established, within which a percentage cover for each species was determined. In total, 133 lichens and one lichenicolous fungus were recorded. Nineteen species were recorded for the first time in Svalbard: Agonimia allobata, Atla wheldonii, Bacidia herbarum, Catolechia wahlenbergii, Epigloea soleiformis, Lecanora behringii, Lepraria subalbicans, Leptogium arcticum, Pertusaria pseudocorallina, Placidiopsis custnani, Protothelenella corrosa, Pyrenidium actinellum, Spilonema revertens, Stereocaulon saxatile, Thelocarpon sphaerosporum, Toninia coelestina, Verrucaria elaeina, Verrucaria murina, and Verrucaria xyloxena. The lichen richness was the lowest in the Ferdinandbreen foreland (24 species) and the highest in the Rieperbreen foreland (82 species). Significant differences in species composition were found among the forelands studied, except for Austre and Vestre Brøggerbreen whose lichen composition was similar. The differences in lichen composition between mature tundra in the vicinity of the following forelands were identified: Vestre Brøggerbreen and Svenbreen, Austre Brøggerbreen and Svenbreen, and Austre Brøggerbreen and Ferdinandbreen. The most dominant group of lichens in both forelands and mature tundra were chlorolichens, not cyanolichens.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: Overview of recent results from the WEGA stellarator
Autorzy:: Otte, M.
Laqua, H. P.
Chlechowitz, E.
Marsen, S.
Preinhaelter, J.
Stange, T.
Rodatos, A.
Urban, J.
Zhang, D.
Tematy:: magnetic confinement
supra-thermal particles
electron Bernstein waves; Pokaż więcej
Wydawca:: Instytut Chemii i Techniki Jądrowej
Powiązania:: https://bibliotekanauki.pl/articles/147486.pdf Link otwiera się w nowym oknie
Opis:: Repeated magnetic flux surface measurements confirmed the existence of closed and nested flux surfaces, but also revealed the existence of magnetic error fields. The simultaneous application of two radio frequency systems for plasma heating operating at 28 GHz and 2.45 GHz, respectively, allowed to reach otherwise non-accessible plasma regimes in WEGA due to synergetic effects. These regimes are characterized by over-dense plasmas at 0.5 T operation by means of electron Bernstein wave heating and the existence of supra-thermal electrons associated with soft X-ray and gamma-rays. The thermal electron diffusion coefficient was determined in the electron Bernstein wave heated plasma regime. Additionally, results from turbulence studies in low density plasmas in the vicinity of magnetic islands are presented.
Dostawca treści:: Biblioteka Nauki