منابع مشابه
Mining Helium programs with Neon
Over the years we have collected a large collection of Haskell programs written by students in a firstyear functional programming course using the Helium compiler. The mining of such a collection is not trivial, especially since the programming was done in vivo, and hence largely outside our control. We have developed a library in Haskell, called NEON, for computing characteristics of this coll...
متن کاملCreating a Cavity-Dumped Helium Neon Laser
We use an acousto-optic modulator to quickly extract circulating optical power from a homebuilt 1.4 m open-cavity helium neon oscillator. We can extract 100 ns pulses with a maximum peak power of approximately 2 mW at a repetition rate of 100 kHz. We can attain repetition rates of over 1 MHz with decreased peak power. This work was supported by the Laser Teaching Center at Stony Brook Universit...
متن کاملRecoil Loss of Cosmogenically Produced Helium and Neon in Presolar
Introduction: Presolar dust grains found in meteorites are widely considered to originate from areas beyond the solar system, an assumption mainly based on their unique isotope composition [1]. Of special interest among these grains are those consisting of silicone carbide (SiC), which represent the second most abundant type of presolar grains found in meteorites. SiC grains are usually larger ...
متن کاملDynamics of Excess Electron Localization in Liquid Helium and Neon
In this paper, we address the relations between the structure, electronic level structure, energetics, and localization dynamics of an excess electron in a bubble in liquid 4He, 3He, and Ne. Our treatment of the dynamics of formation for the electron bubble rests on a quantum mechanical Wigner-Seitz description of the excess electron in conjunction with a hydrodynamic picture for the liquid. Th...
متن کاملAdvantages of Helium and Neon Ion Beams for Intelligent Imaging
Scanning electron microscopy (SEM) has become a crucial tool to visualize the exterior morphology and surface structures for samples in both biology and material science. Conventional SEMs are usually limited by relative low resolution and charging effects. Carbon or metal coating is required for insulator samples to minimize charging effects. However, the coating layer can sometimes obscure mi...
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ژورنال
عنوان ژورنال: Nature
سال: 1913
ISSN: 0028-0836,1476-4687
DOI: 10.1038/091505a0