منابع مشابه
Tesla Polarimeters
We describe a study of high-energy Compton beam polarimeters for the future ee linear collider machine TESLA. A segment of the beam delivery system has been identified, which is aligned with the ee collision axis and which has a suitable configuration for high-quality beam polarization measurements. The laser envisaged for the polarimeter is similar to an existing facility at DESY. It delivers ...
متن کاملLonger laser pulses for practical LII
To date nearly all LII is carried out using Q-switched, flashlamp pumped Nd/YAG lasers with pulse lengths ~10 ns. Although these lasers are well developed and readily available for use in the laboratory and in commercial instruments, they are bulky, inefficient and often the most costly part of an LII system. Cheaper, more compact lasers are becoming available, but very few are able to match th...
متن کاملMultiplexing Prisms for Field Expansion.
PURPOSE Prisms used for field expansion are limited by the optical scotoma at a prism apex (apical scotoma). For a patient with two functioning eyes, fitting prisms unilaterally allows the other eye to compensate for the apical scotoma. A monocular patient's field loss cannot be expanded with a conventional or Fresnel prism because of the apical scotoma. A newly invented optical device, the mul...
متن کاملOptimizing imaging polarimeters constructed with imperfect optics.
Imaging polarimeters are often designed and optimized by assuming that the polarization properties of the optics are nearly ideal. For example, we often assume that the linear polarizers have infinite extinction ratios. It is also usually assumed that the retarding elements have retardances that do not vary either spatially or with the angle of incidence. We consider the case where the polariza...
متن کاملLII - 4 , 4 ème trimestre 2011 SOMMAIRE
We show the existence of bilimits of 2-cofiltered diagrams of topoi, generalizing the construction of cofiltered bilimits developed in [2]. For any given such diagram represented by any 2-cofiltered diagram of small sites with finite limits, we construct a small site for the bilimit topos (there is no loss of generality since we also prove that any such diagram can be so represented). This is d...
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ژورنال
عنوان ژورنال: The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science
سال: 1887
ISSN: 1941-5982,1941-5990
DOI: 10.1080/14786448708628121