Zobrazeno 1 - 10
of 74
pro vyhledávání: '"S. M. Ritzau"'
Autor:
Elizabeth MacDonald, Ruth M. Skoug, David I. Poston, Herbert O. Funsten, Brian A. Larsen, E. E. Dors, S. M. Ritzau, Thomas H. Zurbuchen, R. W. Harper, Paul A. Janzen
Publikováno v:
IEEE Transactions on Nuclear Science. 62:2283-2293
Channel electron multiplier (CEM) and microchannel plate (MCP) detectors are routinely used in space instrumentation for measurement of space plasmas. Our goal is to understand the relative sensitivities of these detectors to penetrating radiation in
Autor:
Ruth M. Skoug, Herbert O. Funsten, H. Henkel, M. Reno, D. J. Mabry, Michelle F. Thomsen, C. Urdiales, James L. Burch, Mike Gruntman, M.K. Young, S. M. Ritzau, Kai Viherkanto, D. T. Everett, B. Blake, S. Weidner, R. Harbaugh, Pontus Brandt, L. M. Friesen, J. H. Clemmons, Uwe Nass, T. S. Sotirelis, R. W. Harper, Earl Scime, J. R. Baldonado, Christer Holmlund, S. Pope, Donald G. Mitchell, David J. McComas, Robert DeMajistre, G. Lay, D. M. Delapp, Jochen H. Zoennchen, Phil Valek, Edmond C. Roelof, W.R. Crain, C. J. Pollock, Tomi Ylikorpi, M. Sivjee, Frederic Allegrini, Jerry Goldstein, Hans-Jörg Fahr
Publikováno v:
McComas, D J, Allegrini, F, Baldonado, J, Blake, B, Brandt, P C, Burch, J, Clemmons, J, Crain, W, Delapp, D, DeMajistre, R, Everett, D, Fahr, H, Friesen, L, Funsten, H, Goldstein, J, Gruntman, M, Harbaugh, R, Harper, R, Henkel, H, Holmlund, C, Lay, G, Mabry, D, Mitchell, D, Nass, U, Pollock, C, Pope, S, Reno, M, Ritzau, S, Roelof, E, Scime, E, Sivjee, M, Skoug, R, Sotirelis, T S, Thomsen, M, Urdiales, C, Valek, P, Viherkanto, K, Weidner, S, Ylikorpi, T, Young, M & Zoennchen, J 2009, ' The two wide-angle imaging neutral-atom spectrometers (TWINS) NASA mission-of-opportunity ', Space Science Reviews, vol. 142, no. 1-4, pp. 157-231 . https://doi.org/10.1007/s11214-008-9467-4
Two Wide-angle Imaging Neutral-atom Spectrometers (TWINS) is a NASA Explorer Mission-of-Opportunity to stereoscopically image the Earth’s magnetosphere for the first time. TWINS extends our understanding of magnetospheric structure and processes by
Publikováno v:
IEEE Transactions on Nuclear Science. 48:1785-1789
We measure the response of silicon photodiodes to irradiation by H/sup +/, He/sup +/, C/sup +/, N/sup +/, O/sup +/, Ne/sup +/, and Ar/sup +/ ions with energies up to 60 keV. The unique properties of these photodiodes, including an ultrathin SiO/sub 2
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. :879-885
We have measured energy distributions of electrons emitted from clean aluminum surfaces by 20 keV/amu H + , He + and He 0 projectiles. Ratios of energy distributions obtained from two types of projectiles carry information on differences in the elect
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 157:110-115
We have studied the excitation of plasmons produced by 100 eV He + , Ne + and Ar + and by 5–100 keV H + and He + projectiles in Al and Mg through the observation of electrons from plasmon decay, ejected from clean and cesiated surfaces. At low velo
Publikováno v:
Physical Review B. 59:15506-15512
We report energy distributions of electrons emitted from Al and Mg surfaces bombarded by 3--100-keV/amu hydrogen and deuterium ions. The energy spectra contain structure consistent with the decay of bulk plasmons, even below the velocity threshold ex
Publikováno v:
IEEE Transactions on Nuclear Science. 45:2820-2825
We measure the change in the response of 100% internal carrier collection efficiency silicon photodiodes having 60 /spl Aring/ SiO/sub 2/ passivation layers due to the damage induced by bombardment with 10-60 keV ions of H, He, N, Ne, and Ar. We find
Publikováno v:
IEEE Transactions on Nuclear Science. 44:2561-2565
Electron irradiation of 100% internal quantum efficiency silicon photodiodes having a thin (60 /spl Aring/) SiO/sub 2/ dead layer results in measured responsivities ranging from 0.056 A/W at an incident electron energy E/sub 0/=0.2 keV to 0.24 A/W at
Publikováno v:
Applied Physics Letters. 84:3552-3554
Recent advances in solid-state detector (SSD) technology have demonstrated the detection of ions and electrons down to 1 keV. However, ions at keV energies lose a substantial amount of energy ΔN in a SSD through Coulombic interactions with target nu
Autor:
M. Kotlarchyk, S. M. Ritzau
Publikováno v:
Journal of Applied Crystallography. 24:753-758
Small-angle neutron scattering was used to investigate the microstructure of the high-temperature Lα phase in the AOT/water/decane system [AOT = sodium bis(2-ethylhexyl) sulfosuccinate]. The system was modeled as randomly oriented lamellar stacks wi