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3 edition of Damage to alkali halide components in CO₂ lasers found in the catalog.

Damage to alkali halide components in CO₂ lasers

K. N. Wise

Damage to alkali halide components in CO₂ lasers

by K. N. Wise

  • 98 Want to read
  • 34 Currently reading

Published by Defence Standards Laboratories in Ascot Vale, Melbourne .
Written in English

    Subjects:
  • Carbon dioxide lasers.,
  • Windows.,
  • Alkali metal halides.

  • Edition Notes

    Bibliography: p. 5.

    Statementby K. N. Wise and J. Glen.
    SeriesDefence Standards Laboratories, Maribyrnong, Victoria. Report 324, Report (Defence Standards Laboratories (Australia)) ;, 324.
    ContributionsGlen, J., joint author.
    Classifications
    LC ClassificationsUF535.A8 A25 no. 324
    The Physical Object
    Pagination10 [9] p.
    Number of Pages10
    ID Numbers
    Open LibraryOL4062178M
    LC Control Number79590003

    temperatures, and metal halide light bulbs will sometimes rupture violently, ejecting intensely hot quartz arc tube fragments, which can land on and potentially ignite nearby combustibles. A TYPICAL SCENARIO It can start out mysteriously: A fire in a sprinklered storage occupancy. The fire damage is well controlled by the. used for optical components both in the near UV as in the infrared for a long time [MBe75], [MFS93]. With today's high power UV laser systems, there is a growing interest in CaF 2 as a material for UV optical components [Hof92]. The most demanding application seems to arise in excimer laser systems used for laser lithography of semiconductors.

    Cesium lead halide perovskite (CsPbX3, with X = Br, Cl, I) nanocrystals have been found to undergo severe modifications under the high-energy electron beam irradiation of a transmission electron microscope (80/ keV). In particular, in our previous work, together with halogen desorption, Pb2+ ions were found to be reduced to Pb0 and then diffused to form lead nanoparticles at temperatures. An F-center, Farbe center or color center (from the original German Farbzentrum, where Farbe means color and zentrum means center) is a type of crystallographic defect in which an anionic vacancy in a crystal lattice is occupied by one or more unpaired ons in such a vacancy tend to absorb light in the visible spectrum such that a material that is usually transparent becomes.

    A metal-halide lamp is an electrical lamp that produces light by an electric arc through a gaseous mixture of vaporized mercury and metal halides. It is a type of high-intensity discharge gas discharge lamp. Developed in the s, they are similar to mercury vapor lamps, but contain additional metal halide compounds in the quartz arc tube, which improve the efficiency and color rendition of the .   General properties of the alkali halide clusters have been reviewed by Johnston and Martin.[1–3] Two techniques are mainly used to produce charged species out of alkali halide targets: (i) laser ablation and (ii) fast projectile sputtering.[4–7] Since LiF is transparent to visible and near UV light, absorbent materials such as Li 3 N mixed.


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Damage to alkali halide components in CO₂ lasers by K. N. Wise Download PDF EPUB FB2

IMPURITY-INDUCED INFRARED ABSORPTION IN ALKALI HALIDE CO. LASER WINDOWS F. Patten, R. Garvey* and M. Hass U. Naval Research Laboratory, Washington, D. (Received October 6, ; Communicated by J. Schulman) ABSTRACT Measurements of the residual absorption of tim in pure and Pb-doped KC1 single crystals indicate that Cited by: 6.

Part of the Optical Physics and Engineering book series (OPEG) Abstract We present a brief review of various metastable and stable absorbing species generated during electron-hole recombination in alkali halides, emphasizing transient components which are the dominant features on the time scale of short laser : R.

Williams, J. Bradford, W. Faust. Abstract. Improvements in laser technology must be accompanied by concomitant improvements in optical materials. The presence of both macroscopic and microscopic defects contribute significantly to the evolution of damage in optical : R. Armistead, T.

Magee. For many alkali halide crystals, the experimental studies have included X-ray emission and absorption spectra, as well as spectra of emission and reflection in the far ultraviolet. However, in spite of the extensive investigations, some of the detailed features of the X Author: V.

Nemoshkalenko, V. Aleshin. pumping lasers of different types. Thus, by using laser diodes for pumping alkali vapors to the D2 transition, we obtain lasing at the closely spaced D1 line, i.e., in fact the incoherent radiation of laser diodes will be converted into coherent radiation.

Because diode-pumped alkali vapor lasers can be. Ion formation from alkali halide solids caused by the irradiation of high power (some W/ cm2) pulsed lasers is investigated by means of time-of-flight mass spectrometry (LAMMA®).

Laser control of product electronic state: Desorption from alkali halides Article in The Journal of Chemical Physics (5) March with 6 Reads How we measure 'reads'.

The cause of alkali metal loss and surface damage which take place during additive-colouration, using a simple heat-pipe, have been investigated.

It has been found that both effects have their origin in the outgassing of the colouration tube and can be easily minimized, thus allowing the attainment of laser-quality coloured crystals. Laser power dependence of luminescence of alkali halide crystals.

A, D, and * represent Nal, NaBr, and Csl crys- tals, respectively. through a radiationless process [23 25]. The halogen atom can be moved out from the original lattice site to be trapped as an interstitial (H centers) and the elec- tron is trapped in the original negative ion.

Methods to eliminate these radicals are discussed. INTRODUCTION Alkali halides are attractive materials for use as window and optical elements in IR detector and laser systems, particularly because of their high transmissivity in the far-IR ( gm) region.

These compounds, however, are fragile and are sensitive to moisture. Also they resist high power levels and have excellent optical qualities. Quartz is usually used in CO2 lasers. The material Alkali Halides can be used in optical components. These are designed to operate in the infrared portion of the spectrum.

Most common Alkali Halides used for infrared optics are Sodium Chloride (NaCl) and potassium chloride (KCl). Anne M. Hofmeister, in Measurements, Mechanisms, and Models of Heat Transport, Effect of Thickness at Ambient Temperature. Much of the data in Fig.

comes from our published studies, although sample length was not always listed. Examples are alkali halides, quartz, and muscovite data include samples with low amounts of impurities. alkali halide lasers and pressure marker. The molecular dissoci ation energy [1] f or a st able diatomic system is defined as the difference between the dissociation limit and th e zero point.

Some outgassing components are surprisingly resistant to laser damage. You may also find that the outgassing components get pinned to the. State to Warn About Halide Light Dangers Janu Oregon schools, warehouses and businesses will soon be getting a state safety warning about the potential danger of ultraviolet exposure from cracked metal halide lights.

Non-radiative decay of the electronic excitations (excitons) into point defects (F–H pairs of Frenkel defects) is main radiation damage mechanism in many ionic (halide) l time scale of the relaxation of the electronic excitation into a primary, short-lived defect pair is about 1–50 ps with the quantum yield up to – Nowadays, semiconductor lasers have become one of the most indispensable components in the optoelectronic systems and found increasing applications for a variety of purposes, such as for optical.

SOURCES: 1. "The Periodic Table." GCSE Science. GCSE Science, n.d. Web. 19 Feb. "Q's&Tips." Q's&Tips. N.p., n.d. Web. 20 Feb. "NaCl Formation. Start studying Chemical and physical properties of Group 1 and Group 7.

Learn vocabulary, terms, and more with flashcards, games, and other study tools. @article{osti_, title = {Positron Annihilation in Insulating Materials}, author = {Asoka-Kumar, P and Sterne, PA}, abstractNote = {We describe positron results from a wide range of insulating materials. We have completed positron experiments on a range of zeolite-y samples, KDP crystals, alkali halides and laser damaged SiO{sub 2}.

Herein we present a green and facile approach to the successful reduction of graphene oxide (GO) materials using molten halide flux at °C. GO materials have been synthesized using a modified Hummers method and subsequently reduced for periods of up to 8 h.

Reduced GO (rGO) flakes have been characterized using X-ray-diffraction (XRD), Raman spectroscopy, X-ray photoelectron .A halide is a binary phase, of which one part is a halogen atom and the other part is an element or radical that is less electronegative (or more electropositive) than the halogen, to make a, e.g., fluoride, chloride, or theoretically tennesside compound.

The alkali metals combine directly with halogens under appropriate conditions forming halides of the general formula, MX (X = F, Cl, Br or I).Here, the halide ion $\ce{X-}$ is not changing, so $\Delta H_\ce{X}$ is a constant and we only need to consider the other two terms: Going from $\ce{Li}$ to $\ce{Cs}$, the atomisation enthalpy decreases and the first ionisation energy decreases.

That means that $\Delta H_\ce{M}$ decreases.