@techreport{oai:nifs-repository.repo.nii.ac.jp:00010230,
 author = {Sudo,  S. and Kanno,  M. and Kaneko,  H. and Saka,  S. and Shirai,  T. and Baba,  T.},
 month = {Nov},
 note = {From the results of the simulation study including pellet ablation and 1-D transport code, it is found that a high speed pellet injector with pellet velocity of more than 3 km/s is necessary for the penetration of the pellet with diameter of 3 mm into the core region under the expected plasma condition of Large Helical Device (LHD) of heliotron/stellarator type with superconducting coils at NIFS in Japan. Therefore, a two stage pellet injector was constructed and tested successfully in order to obtain the pellet velocity range of 3 km/s. Based upon the above results, a high speed flexible multiple-pellet injection system "HIPEL" for LHD is proposed. HIPEL consists of independent (1) 10 two-stage gun barrels and (2) 10 single-stage gun barrels. It has multi purposes such as refueling and flexible density profile control, diagnostics and the other functions.},
 title = {Proposed High Speed Pellet Injection System "HIPEL" for Large Helical Device},
 year = {1993}
}