The rQ3 branch of HSSD at 656 GHz: Example of a frequency-tripled backward wave oscillator

1994 ◽  
Vol 72 (11-12) ◽  
pp. 1315-1321 ◽  
Author(s):  
W. Etzenbach ◽  
A. H. Saleck ◽  
M. Liedtke ◽  
G. Winnewisser
Keyword(s):  
Local Oscillator ◽  
Excited Vibrational State ◽  
Backward Wave Oscillator ◽  
Rotational Spectra ◽  
Quantum Numbers ◽  
Wave Oscillator ◽  
Backward Wave ◽  
Input Radiation ◽  
Wave Region ◽  
First Time

The rQ3 branch of HSSD with its band head located in the submillimetre-wave region at about 656.5 GHz has been measured up to J = 28 for the ground and for the first excited stretching state. Commencing with medium J quantum numbers (J > 11) the inertial asymmetry splitting is observed, whereas for J > 27 each K-split line separates further into equally strong b- and c-type transitions. For the first time it has been possible to assign Q-branch rotational lines of HSSD to an excited vibrational state, the first excited stretching state νs = 1, which yield differences in the rotational constants: (i) A – B = 93 731.204 (71) MHz and (ii) B – C = 149.69 (14) MHz. The rotational spectra have been recorded with a newly designed wave-guide multiplier, optimized for providing local oscillator power at 660 GHz for astrophysical applications when pumped at 220 GHz. The input radiation was provided by a carcinotron (backward wave oscillator).

The rQ2-branch of HOOH at 1.05 THz

1994 ◽  
Vol 49 (4-5) ◽  
pp. 525-529 ◽  
Author(s):  
A. F. Krupnov ◽  
S. P. Belov ◽  
G. Winnewisser ◽  
J. Behrend ◽  
M. Liedtke ◽  
...  
Keyword(s):  
Internal Rotation ◽  
Potential Barrier ◽  
Radiation Source ◽  
Rotational Spectrum ◽  
Rotational Constants ◽  
Backward Wave Oscillator ◽  
Clear Separation ◽  
Wave Oscillator ◽  
Backward Wave ◽  
First Time

Abstract The lower frequency rQ2-branch o f the torsional split rotational spectrum of HOOH has been recorded for the first time near 1.05 THz with Doppler limited resolution employing a Backward Wave Oscillator as the radiation source. The position of the Q-branch lines can be predicted very closely from a set of effective rotational constants derived individually for the two torsionally split levels. The symmetry of the molecule, and the height of the potential barrier against internal rotation, are the two main reasons for the clear separation between the rotational and torsional contributions to the spectrum of HOOH as well as the analogous molecule HSSH.

Theoretical and experimental investigations of the cyclotron interaction effect on relativistic backward-wave oscillator operation

1993 ◽  
Author(s):  
Baruch Levush ◽  
A. Vlasov ◽  
Gregory S. Nusinovich ◽  
Alan Bromborsky ◽  
Thomas M. Antonsen, Jr. ◽  
...  
Keyword(s):  
Interaction Effect ◽  
Experimental Investigations ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave

Experiment on the plasma-loaded backward-wave oscillator using a gas-loaded foil-less diode

2000 ◽  
Vol 88 (5) ◽  
pp. 3059-3063 ◽  
Author(s):  
Bao-Liang Qian ◽  
Chuan-Lu Li ◽  
Yong-Gui Liu ◽  
Jian-De Zhang ◽  
Qi-Mei Tan ◽  
...  
Keyword(s):  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave
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