TY - JOUR
T1 - A low-level activation technique for monitoring thermonuclear fusion plasma conditions
AU - Gasparro, Joël
AU - Hult, Mikael
AU - Bonheure, Georges
AU - Johnston, Peter N.
PY - 2006/10
Y1 - 2006/10
N2 - Optimisation of the confinement and sustainability of a thermonuclear plasma requires methods to monitor processes in the plasma. In this work three materials were used as activation targets (Ti, MgF2 and a TiVAl compound). They were placed inside the joint European Torus (JET) vacuum chamber. Certain gamma-ray emitting radionuclides (7Be, 54Mn, 56Co, 57Co, 58Co and 46Sc) were measured using ultra low-level gamma-ray spectrometry in an underground laboratory 1-2 months after activation. They were found to arise from neutron activation of bulk sample material and surface contaminants sputtered from other Tokamak parts. Decision thresholds for some activation products were determined in order to aid in giving upper bounds for the flux of charged particles.
AB - Optimisation of the confinement and sustainability of a thermonuclear plasma requires methods to monitor processes in the plasma. In this work three materials were used as activation targets (Ti, MgF2 and a TiVAl compound). They were placed inside the joint European Torus (JET) vacuum chamber. Certain gamma-ray emitting radionuclides (7Be, 54Mn, 56Co, 57Co, 58Co and 46Sc) were measured using ultra low-level gamma-ray spectrometry in an underground laboratory 1-2 months after activation. They were found to arise from neutron activation of bulk sample material and surface contaminants sputtered from other Tokamak parts. Decision thresholds for some activation products were determined in order to aid in giving upper bounds for the flux of charged particles.
KW - Activation
KW - Charged particles
KW - Thermonuclear fusion
KW - Ultra low-level gamma-ray spectrometry
KW - Underground laboratory
UR - http://www.scopus.com/inward/record.url?scp=33751114441&partnerID=8YFLogxK
U2 - 10.1016/j.apradiso.2006.02.009
DO - 10.1016/j.apradiso.2006.02.009
M3 - Article
C2 - 16580838
AN - SCOPUS:33751114441
SN - 0969-8043
VL - 64
SP - 1130
EP - 1135
JO - Applied Radiation and Isotopes
JF - Applied Radiation and Isotopes
IS - 10-11
ER -