Title :
A new two-stage pellet injector for FTU
Author :
Martinis, L. ; Scaramuzzi, F. ; Frattolillo, A. ; Migliori, S. ; Reggiori, A. ; Riva, Giuseppe
Author_Institution :
ENEA-TIB, Rome
Abstract :
The most recent steps for developing injectors that meet the requirements of the Frascati Tokamak Upgrade are described. Details of a cryostat capable of building 1.6-mm-diameter deuterium pellets are given. Such pellets have been successfully accelerated up to 2.8 km/s with good repeatability, using a relatively large two-stage gun (0.5-m long, 3.5-cm diameter) as a propeller. A miniature version of the propeller was developed and tested using plastic pellets. Velocities of up to 3.2 km/s were obtained. The final goal is to build a complete miniature system capable of very high pellet velocities using reduced volumes of propelling gas
Keywords :
Tokamak devices; cryostats; fusion reactor theory and design; 0.5 m; 1.6 mm; 2800 m/s; 3.5 cm; 3200 m/s; D pellets; FTU; Frascati Tokamak Upgrade; cryostat; two-stage gun; two-stage pellet injector; Acceleration; Cryogenics; Deuterium; Guns; Helium; Plastics; Propellers; Propulsion; Testing; Tokamaks;
Conference_Titel :
Fusion Engineering, 1989. Proceedings., IEEE Thirteenth Symposium on
Conference_Location :
Knoxville, TN
DOI :
10.1109/FUSION.1989.102439
