Micro-discharge device

Fig. 9.3.6 Photo of a micro-discharge device (MDD) in operation with visible glow emission, compliments of Caviton, Inc. [9], and envisioned MDD assembly with spectrometer (right-hand side).

Fig. 9.3.13 (a) Recorded micro-discharge device (MDD) emission spectra in air, with and without the presence of 1 % of trichloroethane, showing Cl emission. (Courtesy of C. Herring etal. [11].)... 

Jenkins, G., Manz, A., Optical emission detection of liquid analytes using a micro-machined d.c. glow-discharge device at atmospheric pressure. Micro Total Analysis Systems, Proceedings 5th p714S Symposium, Monterey, CA, Oct. 21-25,2001, 349-350. 

For smart cards, micro-robots and small precision instruments, thin laminated micro-cells are being developed. Some of these developmental thin-film devices—using an electrolyte of lithium, a copper cathode, and lithium again for the electrode—can charge and discharge up to 3 volts, and can be expected to tolerate up to 1,000 charge-and-discharge cycles. 

This technique has been used to produce glass-ceramic components that are particularly useful in equipment manufacturing, micro-mechanics, and in the electrical industry. The material can be used for the following applications gas discharge panels, ink-jet printer plates, fluid devices, and magnetic recording head pads. Examples of these applications are shown in Fig. 4-2. 

The designs for several small-scale cw HF(DF) chemical lasers have been given in the literature. " These devices deliver power outputs of a few watts when operated with mixtures of H2(D2), SFe, and helium. Operation as an HCl chemical laser is also possible in this type of laser with either the Cl + HI > HCl + I or H + CI2 -> HCl + Cl reactions, albeit with somewhat lower power outputs than the HF(DF) lasers. Figure 3.8 illustrates one such device. An electrical discharge of about 1 kW(DC, RF, or micro-wave) is commonly used for dissociation of SFg to provide a source of F atoms. Hydrogen is injected by means of small orifices in a direction transverse to the primary flow of partially dissociated SFg in a helium diluent. The optical cavity is aligned transversely to the flow direction as shown in Figure 3.8. The output of such lasers usually consists of several P-branch transitions in the 1 ->0, 2-> 1, or 1 ->0, 2-> 1, and 3->2 bands for HF or DF, respectively. Operation as an HCl laser produces P-branch transitions in the... 

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