A c c e p t e d m a n u s c r i p t remote sensing and will make measurements on spatial scales of less than 10 km for 57 major elements during solar flares, sufficient to isolate surface landforms, such as craters 58 and their internal structures. The spatial resolution achieved by MIXS-T is made possible 59 by novel, low mass microchannel plate X-ray optics, in a Wolter type I optical geometry. 60 61 MIXS measurements of surface elemental composition will help determine rock types, 62 the evolution of the surface and ultimately a probable formation process for the planet. In 63 this paper we present MIXS and its predicted performance at Mercury as well as 64 discussing the role that MIXS measurements will play in answering the major questions 65 about Mercury. 66 67
The properties of the dimuon enhancement seen in 400-GeV proton-nucleus collisions have been clarified by a threefold increase in data. We find two peaks whose widths are consistent with our resolution: M x = 9.4 GeV with B dcr/dy \ y =o= 1.8 x 10" 37 cm 2 /nucleon and M 2 = 10.0 GeV with B da/dy | y=0 =0 o 7xl0" 37 cm 2 /micleon. Evidence for the possible existence of a third peak near 10.4 GeV is discussed as are the comparisons with the properties of a qq system, where q is a new heavy quark.
A diode irradiation with 10-MeV protons was performed to measure the silicon current related damage rate at a temperature of 50 C. This measurement was fundamental to predict the performance of the detectors which will be used in the X-ray spectrometers of the Simbol-X and BepiColombo space missions. These detectors consist of arrays of large area silicon drift chambers with integrated depleted p-channel field effect transistors. The leakage current increase due to radiation damage and its consequent energy resolution degradation can be critical for these missions, specially for BepiColombo. These effects cannot be predicted because, during the whole missions, the sensors will be kept at temperatures below 40 C, and the existing models are based on measurements on structures which underwent annealing at higher temperatures.An irradiation experiment was performed to measure the current related damage rate at 50 C, and the obtained value was (11 1 0 2) 10 17 A/cm. This result implies that it will be possible to achieve the Simbol-X energy resolution, whereas some annealing strategies will be needed for the BepiColombo mission. The annealing behaviour at 60 C was studied as well and the results are in agreement with the already available measurements.
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