Title :
High Power CW THz DCN Laser and FIR Interferometer
Author :
Xu, Q. ; Jie, Y.X. ; Liu, H.Q. ; Cheng, Y.F. ; Tong, X.D. ; Ling, B.L. ; Gao, X.
Author_Institution :
Chinese Acad. of Sci., Hefei
Abstract :
Fusion plasma density can be measured by FIR laser and submillimeter wave interferometer. The DCN laser has the highest specific output power among known submillimeter electricdischarge lasers. Its output characteristics fit the requirements for interferometric measurements on large tokamaks. So that, the continuous wave (CW) discharge-pumped 1.54 THz (195 mum) and 1.58 THz (190 mum) deuterium cyanide (DCN) laser has been designed and developed as the source of FIR laser diagnostics in the EAST tokamak. The laser cavity is a 54 mm inner diameter, 3 m long of pyrex tube with plane reflectors (one of them is a nickel mesh) against its ends. A hot LaB6 cathode is essential in producing a stable discharge at high current density.
Keywords :
Tokamak devices; current density; excimer lasers; light interferometers; measurement by laser beam; plasma density; plasma diagnostics; submillimetre wave lasers; submillimetre wave measurement; DCN laser; FIR interferometer; current density; fusion plasma density; submillimeter wave interferometer; Density measurement; Deuterium; Finite impulse response filter; Laser fusion; Plasma density; Plasma measurements; Power generation; Power lasers; Submillimeter wave measurements; Tokamaks; DCN laser; LaB6 cathode; novel mixture gas; output power; propagation; terahertz (THz);
Conference_Titel :
Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics, 2006. IRMMW-THz 2006. Joint 31st International Conference on
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0400-2
Electronic_ISBN :
1-4244-0400-2
DOI :
10.1109/ICIMW.2006.368305
