Zobrazeno 1 - 10
of 198
pro vyhledávání: '"W.O. Hofer"'
Publikováno v:
Applied Physics. 11:289-293
The transmission sputtering yield of gold for 6.8-MeV Au– bombardment has been measured on targets of thicknesses from 250 to ∼ 7000 A. The results are compared to Sigmund's theory and to recent calculations of deposited-energy depth distribution
Publikováno v:
Journal of Nuclear Materials. :387-390
The sputtering yield of molybdenum and angular distribution of sputtered molybdenum under oxygen exposure have been measured for D+- and He+-irradiation in the energy region from 2.5 keV to 6 keV at temperatures ranging from ambient room temperature
Publikováno v:
International Journal of Mass Spectrometry and Ion Physics. 21:103-112
By means of a new ion-electron converter having a spherically shaped stainless-steel conversion electrode, the electron yields of various atomic ions, molecular ions and cluster ions were investigated for a fixed ion energy of 15 keV. The pulse heigh
Publikováno v:
Radiation Effects. 28:87-95
A technique for measuring sputtering yields of thin foils has been developed. The loss of target material due to sputtering is determined by measuring the thickness change by forward scattering of 500-keV protons. By coating one surface of the target
Publikováno v:
Nuclear Instruments and Methods. 132:301-305
The backsputtering yield of gold bombarded with gold ions has been measured in the energy range from 60 keV to 20 MeV. The targets were polycrystalline, self-supporting gold foils, 3000–6000 A thick, and the sputtering yield was determined by measu
Publikováno v:
Nuclear Fusion. 23:945-953
Scientists and engineers, engaged in design, construction and operation, as well as programme planners, met last year for the '12th SOFT' (Symposium on Fusion Technology) at the Julich Nuclear Research Centre (KFA Julich) from September 13 to 17. Jus
Publikováno v:
International Journal of Mass Spectrometry and Ion Physics. 19:327-334
An electronic aperture for in-depth concentration measurements with an ion microprobe is described. Measurements on polycrystalline metal samples were performed to test the ability of the instrument and its applicability in sputtering yield investiga
Autor:
P.J. Martin, W.O. Hofer
Publikováno v:
Applied Physics. 16:271-278
As a continuation of earlier sputtering yield measurements in an ion microprobe, the influence of oxygen and nitrogen on sputtering yield, ionisation efficiency and depth resolutions has been studied. For inert gas bombardment the yield of Ti and V f
Publikováno v:
Nuclear Instruments and Methods in Physics Research. 191:275-281
A series of niobium-vanadium alloys were investigated using the ion bombardment analytical techniques of ion scattering spectrometry, sputter induced photon spectroscopy and secondary ion mass-spectrometry. The measurements show that long term transi
Autor:
R. Behrisch, S.K. Erents, G.M. McCracken, W.O. Hofer, K.J. Dietz, F. Thum, D.H.J. Goodall, M. Cowlin
Publikováno v:
Journal of Nuclear Materials. :383-389
A proposal has been prepared for three facilities for diagnosing the plasma surface interactions and the plasma edge parameters in JET. The principal system proposed will be for plasma edge diagnostics. A carriage driven by linear motors and containi