نتایج جستجو برای: negative ion
تعداد نتایج: 728793 فیلتر نتایج به سال:
An overview on four-year operation of the negative-ion-based NBI (N–NBI) system for the Large Helical Device (LHD) is presented, and prospects of negative-ion technology for applying it to future helical fusion reactors are discussed from theses experiences. The N–NBI system was designed and constructed based on the results of R&D at NIFS. Using three beam lines, the total port-through injectio...
The ratio of the negative ion density to the electron density has been determined using a novel two-probe technique in the diffusion chamber of an SF6 helicon reactor. The Bohm flux (as modified by negative ions) was measured using a guarded planar probe, while the electron thermal current was obtained using a small cylindrical probe. The negative ion concentration was then determined from the ...
Negative-ion fragmentation of N-glycans has been proven to be more informative than that of positive-ion. In particular, it defines structural features such as the specific composition of the two antennae and the location of fucose. However, negative-ion formation of neutral N-glycans by matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) remains a challenging task, and the...
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