Title :
Progress of CW and short-pulse calorimetric loads for high power millimeter-wave beams
Author :
Gandini, F. ; Bin, W. ; Bruschi, A. ; Cirant, S. ; Granucci, G. ; Mellera, V. ; Muzzini, V. ; Nardone, A. ; Sozzi, C. ; Spinicchia, N.
Author_Institution :
Ist. di Fisica del Plasma, ENEA-CNR-EURATOM, Milano, Italy
Abstract :
A family of compact matched loads for high power millimeter wavelength beams absorption, good for atmospheric and vacuum operation, suited for CW (1MW) or short pulses (2MW, 0.ls) precise measurement has been designed to test high power gyrotrons. The common origin for members of this family is a toad developed for the ECRH FTU plant (140 GHz, 0.5 s, 0.5 MW) and successfully exploited. A CW version of the load has been built and used as absorber and bolometer for the high-power test of a remote steering launcher mock-up at 140 GHz. The high-power tests have been performed with powers up to 700 kW and pulse lengths of up to 10 seconds without limitation due to the load. An investigation of the gas emission properties of the load coating material at high temperature and under vacuum has been accomplished by means of high power deposition from an electron gun. Results from these tests are presented.
Keywords :
bolometers; calorimetry; electron tube testing; gyrotrons; millimetre wave generation; 0.1 s; 0.5 MW; 1 MW; 140 GHz; 2 MW; 700 kW; bolometer device; gas emission properties; high power deposition; high power gyrotron; high power millimeter wavelength beam absorption; load coating material; remote steering launcher; short-pulse calorimetric load; Absorption; Atmospheric measurements; Atmospheric waves; Bolometers; Gyrotrons; Millimeter wave measurements; Power measurement; Pulse measurements; Testing; Wavelength measurement;
Conference_Titel :
Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, 2005. IRMMW-THz 2005. The Joint 30th International Conference on
Print_ISBN :
0-7803-9348-1
DOI :
10.1109/ICIMW.2005.1572557
