Characteristics of four-channel Cherenkov-type detector for measurements of runaway electrons in the ISTTOK tokamak

Plyusnin, V. V.; Jakubowski, L.; Zebrowski, J.; Duarte, P.; Malinowski, K.; Fernandes, H.; Silva, C.; Rabinski, M.; Sadowski, M. J.
October 2010
Review of Scientific Instruments;Oct2010, Vol. 81 Issue 10, p10D304
Academic Journal
A diagnostics capable of characterizing the runaway and superthermal electrons has been developing on the ISTTOK tokamak. In previous paper, a use of single-channel Cherenkov-type detector with titanium filter for runaway electron studies in ISTTOK was reported. To measure fast electron populations with different energies, a prototype of a four-channel detector with molybdenum filters was designed. Test-stand studies of filters with different thicknesses (1, 3, 7, 10, 20, 50, and 100 μm) have shown that they should allow the detection of electrons with energies higher than 69, 75, 87, 95, 120, 181, and 260 keV, respectively. First results of measurements with the four-channel detector revealed the possibility to measure reliably different fast electrons populations simultaneously.


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