LYCOS RETRIEVER 
Lens
built 633 days ago
Youthful functional vision is the ability of the young crystalline lens to compensate for the spherical aberration of the cornea, providing quality vision. With age, the crystalline lens loses the ability to compensate for the cornea, resulting in increased spherical aberration and reduced functional vision.
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The SANS instrument will be a conventional pin-hole instrument that exploits the cold spectrum available from the LENS moderator to reach a minimum Q on the order of 0.05nm-1 with relatively course geometric collimation in order to maximize the available flux. The sample position will be 8.0m from the moderator face, and the secondary flight path may be varied between 1.5 and 4.5m. The instrument\'\s wavelength band runs from 0.45nm (set by a Be filter in the incident beam) to 1.3 or 2.0 nm (depending on the secondary flight path length and source frequency). Initially the instrument will employ an Ordella delay line 2-D area detector with 1cm resolution and will ... include a detector in the beam stop to measure energy-dependent total cross sections simultaneously with small angle scattering.')" onmouseout="hideTip()" /> Moderator Testing
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In a perfect world, you would leave the house with only a Canon 14 super-wide lens. You would worry only about camera position, secure in the knowledge that the 14mm lens was wide enough to capture the entire subject under 99% of conditions. Then if you wanted a picture of just a friend in the middle of the frame, you'd crop down to just the center and use that. The result would be the same as if you'd used a 100mm portrait lens.
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LENS will employ high-powered klystrons that were left over from a Radar station in Alaska that is no longer scanning the skies to find Soviet missiles coming over the Arctic ocean. The initial pair of klystrons is capable of providing peak power levels over 1.7MW to the accelerator. Installing these klystrons, along with the AC power supplies and switching gear needed to run them, has been a major part of the power upgrade for the facility.')" onmouseout="hideTip()" /> Accelerator
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This new lens does what many pros thought couldn't be done - replace the previous L-series 28-70 f/2.8 lens with something even better. Extended coverage to an ultra-wide-angle 24mm makes it ideal for digital as well as film shooters, and the optics are even better than before with two Aspherical elements and a totally new UD glass element. It's now sealed and gasketed against dust and moisture, and a new processing unit makes the AF faster than ever.
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The Low Energy Neutron Source (LENS) is a novel, university-based pulsed neutron source under construction at the Indiana University Cyclotron Facility. The facility will begin normal operations early in 2007. The source utilizes a low energy p-n reaction in Be coupled with a high-current, variable-pulse-width proton accelerator to produce either short or long neutron pulses. A highly optimized moderator produces cold and very cold neutrons for use by a suite of neutron scattering instruments and development facilities. For a general description of how the source works click here. More details about the various components of the source may be obtained by clicking on the structures of interest in the figure below.
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