Results 1 - 10 of 25311
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[en] The experimental X-ray mass absorption coefficients data of the most usual absorbants (aluminium, beryllium and nickel) were subject to a careful computational processing. The best fits for these values are given. This note presents some useful computations to facilitate the filter method use for the hot plasma electron temperature determination. (author)
[en] The ITER low field side reflectometer faces some unique design challenges, among which are included the effect of relativistic electron temperatures and refraction of probing waves. This paper utilizes GENRAY, a 3-D ray tracing code, to investigate these effects. Using a simulated ITER operating scenario, characteristics of the reflected RF waves returning to the launch plane are quantified as a function of a range of design parameters, including antenna height, antenna size, and antenna radial position. Results for edge/SOL measurement with both O- and X-modes using proposed antennas are reported.
[en] This paper presents an implementation for improving muti-level cell NOR flash memory program throughput based on the channel hot electron (CHE) temperature characteristic. The CHE Ig temperature characteristic is analyzed theoretically with the Lucky electron model, and a temperature self-adaptive programming algorithm is proposed to increase Ig according to the on-die temperature. Experimental results show that the program throughput increases significantly from 1.1 MByte/s without temperature self-adaptive programming to 1.4 MByte/s with the proposed method at room temperature. This represents a 30% improvement and is 70 times faster than the program throughput in Ref. . (semiconductor integrated circuits)
[en] In this memo, we evaluate the most probable yield and other results for the Defect Induced Mix (DIME-12A) Polar Direct Drive (PDD) capsule-only shots. We evaluate the expected yield, bang time, burn averaged ion temperature, and the average electron temperature of the Ge line-emitting region. We also include synthetic images of the capsule backlit by Cu K-α emission (8.39 keV) and core self-emission synthetic images. This memo is a companion to the maximum credible yield memo (LA-UR--12-00287) published earlier.
[en] A new technique for estimating the magnitude of the chord-averaged plasma electron temperature is described, permitting improved time resolution. A CAMAC software package VEKTOR has been developed to implement this algorithm. The measuring circuit has been checked in a test system for input voltages up to 400 kHz from a spectrometric signal simulator. The operating system is controlled by an IBM PC/AT. The program is constructed using standard routines. It includes an asynchronous data acquisition package, a universal parallel program interpreter, a menu of processing programs, and data visualization. The software runs under MS-DOS (version 3.3). 1 ref., 3 figs
[en] In this study, electron-velocity distribution in low density plasma (nsub(e) = 8.9 x 107 cm-3, Tsub(e) = 2.8 x 1040K) has been measured by resonance probe method. The curves of the probe rectified current have been plotted when both direct and alternating potential were applied to the probe. The second derivation of electron current for each applied potential has been found experimentally. Using this result and Druyvesteyn Formula, electron-velocity distribution has been measured. (author)
[en] In nonisothermal plasmas at temperature Te≫Ti diffusion plays a decisive role at conditions of smooth inhomogeneity when the inhomogeneity size is much larger than √(Te/Ti) times the Debye radius. When the inhomogeneity is rather abrupt and this condition is violated, then during the spreading process the Maxwellian relaxation of ion charges becomes significant. Here, we consider these two phenomena together and refer to the anomalous character of diffusion, i.e., anomalous diffusion.