نتایج جستجو برای: ray output
تعداد نتایج: 484816 فیلتر نتایج به سال:
We revisit the limits of the level of the extragalactic background light (EBL) recently reported by the MAGIC collaboration based on the observed γ-ray spectrum of the quasar 3C279, considering the impact of absorption of high-energy γ-ray photons inside the broad line region (BLR) of the quasar. We use the photoionization code CLOUDY to calculate the expected optical-UV radiation field inside ...
We present what is to our knowledge the first longitudinal coherence measurement of a transient inversion collisional x-ray laser. We investigated the picosecond output of a Ni-like Pd x-ray laser at 14.68 nm generated by the COMET laser facility at the Lawrence Livermore National Laboratory. Interference fringes were generated with a Michelson interferometer setup in which a thin multilayer me...
We have generated a laser average output power of 2 microW at a wavelength of 13.9 nm by operating a tabletop laser-pumped Ni-like Ag laser at a 5 Hz repetition rate, using a solid helicoidal target that is continuously rotated and advanced to renew the target surface between shots. More than 2 x 10(4) soft-x-ray laser shots were obtained by using a single target. Similar results were obtained ...
BeppoSAX observations of Mkn501 in April 1997 (Pian et al. 1998), have revealed an extraordinary X–ray emission from this BL Lac object, during a phase of high activity at TeV energies, as monitored with the Whipple, HEGRA and CAT Cerenkov telescopes. The 0.1–200 keV spectrum was hard, and the X–ray power output peaked at or above 100 keV, 2 or 3 orders of magnitude more than what indicated by ...
BeppoSAX observations of Mkn501 in April 1997 (Pian et al. 1998), have revealed an extraordinary X–ray emission from this BL Lac object, during a phase of high activity at TeV energies, as monitored with the Whipple, HEGRA and CAT Cerenkov telescopes. The 0.1–200 keV spectrum was hard, and the X–ray power output peaked at or above 100 keV, 2 or 3 orders of magnitude more than what indicated by ...
Modern satellite based experiments are often very complex real-time systems, composed by flight and ground segments, that have challenging resource related constraints, in terms of size, weight, power, requirements for real-time response, fault tolerance, and specialized input/output hardware-software, and they must be certified to high levels of assurance. Hardware-software data processing sys...
چکیده : ofdm یک تکنیک مدلاسیون برای ارسال داده با سرعت بالا در کانال محو شدگی چند مسیره است. مهم ترین عاملی که سیستم های siso-ofdm (single-input single output ofdm) را با مشکل مواجه می سازند منابع تداخل می باشد. به منظور حذف تداخل استفاده از آنتن های آرایه ای در گیرنده سیستم های ofdm پیشنهاد شده که simo-ofdm (single-input multiple-output - ofdm) نامیده می شود. یکی از راههای افزایش ظرفیت کانال ...
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