Cooling cavity

Fig. 9.76 Schematic drawing of the cooled cavity with atom source and field ionization detector...

Figure 2 Schematic diagram of a water-cooled cavity.

Figure 3 Sa emission spectrum from carbon disulfide vapors introduced into a water-cooled cavity into which cooling water is supplied at (A) low and (B) high flow rate, showing the effect of the Salet phenomenon on the emission (C flame background emission). (Reproduced from Stiles DA, Calokerinos AC, and Townshend A (1994) Flame Chemiluminescence Analysis by Molecular Emission Cavity Detection. New York Wiley.)...

Figure 6 Schematic diagram of a gas generation MECA system for the determination of ammonium. The specific design incorporates a water-cooled cavity with a constant supply of oxygen (oxy-cavity) and is used for the generation of ammonia from ammonium samples. Ammonia is continuously purged into the cavity, reacts with oxygen and generates a bright white emission due to the NO-0 reaction. (Reproduced with permission from Belcher R, Bogdanski SL, Calokerinos AC, and Townshend A (1981) Analyst 106 625-635 The Royal Society of Chemistry.)...

In gas generation MECA detection, a water-cooled cavity is positioned permanently within the flame. The processes that occur are the generation of excited species, deexcitation, and emission. Therefore, the analyte must be supplied to the cavity as a gas or vapor generated from a chemical reaction and the tm... 

Water-cooled cavities can be employed for effective use of the Salet phenomenon. 

Typical application of MECA detection after gas chromatographic separation include the separation and detection of chlorinated solvents and pesticides by using an indium-lined cavity and bromo- and iodo-compounds by using a copper water-cooled cavity. 

A method of forming a plastic to the desired shape by forcing the softened plastic into a relative cool cavity... 

Fig. 14.50. (a) Schematic diagram of the cooled cavity (b) calculated Rabi oscillation of an atom in the cavity field at r = 0 K and at r = 3 K, damped by the statistical influence of the thermal radiation field. The experimental points are measured with a velocity selector that allowed transit times of 30-140ps [14.132]... 

Injection molding is done by placing the polymer in powder or pellet form into the heated cavity of an injection molding machine, allowed to soften, followed by pushing forward into a cooled cavity by a ram or reciprocating screw where it remains until it is below its Tg or Tm to ensure that the part retains the desired form.68... 

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