منابع مشابه
Silicon Detectors for the Super LHC
The luminosity upgrade of the Large Hadron Collider (LHC) at CERN to the Super LHC (sLHC) will increase the radiation dose at the experiments by roughly an order of magnitude. The elevated radiation levels require the LHC experiments to upgrade their tracking systems with extremely radiation hard detectors, capable of withstanding about a 1-MeV neutron-equivalent (neq) fluence of 1016 per squar...
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Following an expected increase of the LHC luminosity beyond its design value of 1034 cm−2s−1 the CMS collaboration is planning for a series of upgrades on the experimental apparatus. In particular the silicon tracker should undergo two major upgrades to cope with the increased luminosity of the collider. The first intervention (Phase I) concerns a replacement of the pixel system, the rest of th...
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1200 V/ 3 mm active-area SiC “Super” Junction Transistors (SJTs) display current gains as high as 88 and majority carrier operation up to 250 °C. The SJT operation shifts from purely unipolar to bipolar-mode at temperatures ≥ 300 °C. The leakage currents at a blocking voltage of 1200 V remain below 100 μA, even at 325 °C. Temperature-independent turn-on and turn-off times < 15 ns are measured u...
متن کاملSuper-enhancement of 1.54 μm emission from erbium codoped with oxygen in silicon-on-insulator
We report on the super enhancement of the 1.54 μm Er emission in erbium doped silicon-on-insulator when codoped with oxygen at a ratio of 1:1. This is attributed to a more favourable crystal field splitting in the substitutional tetrahedral site favoured for the singly coordinated case. The results on these carefully matched implant profiles show that optical response is highly determined by th...
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The rhodamine system is a flexible framework for building small-molecule fluorescent probes. Changing N-substitution patterns and replacing the xanthene oxygen with a dimethylsilicon moiety can shift the absorption and fluorescence emission maxima of rhodamine dyes to longer wavelengths. Acylation of the rhodamine nitrogen atoms forces the molecule to adopt a nonfluorescent lactone form, provid...
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ژورنال
عنوان ژورنال: Nature
سال: 2006
ISSN: 0028-0836,1476-4687
DOI: 10.1038/444427a