نتایج جستجو برای: transition radiation detector
تعداد نتایج: 547405 فیلتر نتایج به سال:
Introduction: This study was conducted to measure the gamma emitters (e.g., uranium-238 [238U], thorium-232 [232Th], and potassium-40[40K]) and alpha emitters (e.g., radon-222 [222Rn] and radium), and also to evaluate the radiation hazard indices of radionuclides in parenteral nutrition samples utilized in the hospitals of Iraq. Material and Methods: The measurements were accomplished using ga...
groundwaters hydrochemistry of ayrakan and cheshmeh shotori areas and geochemistry of rare earth elements, indicate ayrakan alkali granite as the origin of uranium and other dissolved elements in groundwaters of these areas. geochemical and hydrogeochemical studies as well as the trend of uranium and thorium transition and mobility in aqueous environments of these areas indicate uranium adsorpt...
Abstract. For the experimental measurements of pyroelectric detectors voltage responsivity, sinusoidal modulated optical radiation should be used. In practice, optical choppers are commonly used in experimental set-ups to modulate optical source and as a result optical radiation may have a square or trapezoidal waveform. In the paper, the frequency dependence of voltage responsivity of pyroelec...
The Collider Detector at Fermilab (CDF) radiation hardened silicon vertex detector (SVX’) is described. The new detector has several improvements over its predecessor such as better signal to noise and higher efficiency. It is expected to have a radiation tolerance in excess of 1 Mrad. It has been taking data for several months and some preliminary results are shown.
The Cosmic Ray Energetics And Mass (CREAM) instrument flew on a high altitude balloon in Antarctica in 2004–2005 for a record breaking 42 days. An array of detectors was deployed to identify cosmic rays and measure their energies up to several hundred TeV. A major science goal is the measurement of secondary nuclei at high energy (produced by spallation reactions of heavier cosmic rays in the i...
A new silicon microstrip detector was designed by the CDF collaboration for the proposed high-luminosity operation of the Tevatron pp̄ collider (Run IIb). The detector is radiation-tolerant and will still be functional after exposure to particle fluences of 10 1-MeV equivalent neutrons=cm and radiation doses of 20MRad. The detector will maintain or exceed the performance of the current CDF silic...
The ATLAS experiment is planning a complete replacement of its inner detector with new all-silicon tracker for the high luminosity phase LHC. designed to cope increased pile-up, data rates and radiation levels HL-LHC, while maintaining or improving current tracking performance. ITk design technology R&D have been completed pre-production modules starting. This paper presents layout, performance...
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