A low-level activation technique for monitoring thermonuclear fusion plasma conditions

Joël Gasparro; Mikael Hult; Georges Bonheure; Peter N. Johnston

doi:10.1016/j.apradiso.2006.02.009

A low-level activation technique for monitoring thermonuclear fusion plasma conditions

Joël Gasparro
, Mikael Hult
, Georges Bonheure
, Peter N. Johnston

Laboratory for Plasma Physics

Inst. for Syst., Info., and Safely
Royal Melbourne Institute of Technology

Onderzoeksoutput: Bijdrage aan een tijdschrift › Artikel › peer review

12 Citaten (Scopus)

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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.

Originele taal-2	Engels
Pagina's (van-tot)	1130-1135
Aantal pagina's	6
Tijdschrift	Applied Radiation and Isotopes
Volume	64
Nummer van het tijdschrift	10-11
DOI's	https://doi.org/10.1016/j.apradiso.2006.02.009
Status	Gepubliceerd - okt. 2006

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10.1016/j.apradiso.2006.02.009

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abstract = "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.",

keywords = "Activation, Charged particles, Thermonuclear fusion, Ultra low-level gamma-ray spectrometry, Underground laboratory",

author = "Jo{\"e}l Gasparro and Mikael Hult and Georges Bonheure and Johnston, \{Peter N.\}",

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AU - Hult, Mikael

AU - Bonheure, Georges

AU - Johnston, Peter N.

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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

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A low-level activation technique for monitoring thermonuclear fusion plasma conditions

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