Millimeter-wave beam system

Fig, 3. Schematic of continuous polyol process using 83 GHz millimeter-wave beam system and silica reaction tube... 

F/g./. NRL 83 GHz Millimeter-Wave Beam Material Processing Facility a) gyrotron and superconducting magnet, b) transition and secondary BN window, c) processing chamber, d) access doors, e) exhaust system, f) 3-axis optics manipulator, g) 2 color optical pyrometer... 

LeSurf, J. C. G. (1990). Millimeter-Wave Optics, Devices, and Systems. Hilger, Bristol. LeSurf, J. C. G. (1993). Gaussian Beam Mode Optics for Millimeter-Wave and Terahertz Systems. Int. Soc. Opt. Eng., Bellingham, WA. 

The diatomic yttrium halides have been the topic of both ab initio and experimental studies. Fischell et al. (1980) have studied the excitation spectra of the YCl diatomic molecule using the laser-induced fluorescence (LIF) method. More recently, Xin et al. (1991) have studied the B ri-X system of YCl in high resolution. The rotational analysis of the observed bands has yielded very accurate molecular constants for the X and B states of YCl. Shirley et al. (1990) have studied the molecular-beam optical Stark spectrum of the B n(t = 0)-X (t = 0) band system of YF. The permanent dipole moment and the magnetic hyperfine parameter a for the B n state have been determined as 2.96(4) D and 146.8(3) MHz, respectively. The dipole moment of the X S state was determined as 1.82(8)D. More recently, Shirley et al. (1991) have employed the molecular-beam millimeter-wave optical pump-probe spectroscopy to study pure rotational transitions of the YF ground state. This study has yielded improved ground-state rotational constants as B = 8683.65(1) MHz and D = 0.0079(2)-MHz, respectively. 

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