|NUKLEONIKA 2012, 57(2):177-181
ESTIMATION OF ISTTOK RUNAWAY-ELECTRONS ENERGIES BY MEANS OF A CHERENKOV-TYPE PROBE WITH MODIFIED AlN RADIATORS
Lech Jakubowski1, Vladislav V. Plyusnin2, Marek J. Sadowski1, Jaroslaw Zebrowski1, Karol Malinowski1, Marek Rabiński1, Horatio Fernandes2, Carlos Silva2, Paulo Duarte2, Marcin Jakubowski1
1 National Centre for Nuclear Research (NCBJ),
7 Andrzeja Sołtana Str., 05-400 Otwock/Świerk, Poland
2 Association Euratom/IST, Instituto de Plasmas e Fusao Nuclear,
Universidade Técnica de Lisboa, Portugal
Measurements of fast electrons, as performed during recent few years in small tokamaks, demonstrated that detectors based on the Cherenkov effect are very useful tools for such studies. The modernized measuring heads, which were equipped with miniature aluminum-nitride (AlN) radiators, enabled to determine locations and instants of the fast electrons emission and to estimate their energy. A comparison of four measuring channels showed that in ISTTOK the most important role was played by electrons of energy < 90 keV.