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

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

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.

Original language	English
Pages (from-to)	1130-1135
Number of pages	6
Journal	Applied Radiation and Isotopes
Volume	64
Issue number	10-11
DOIs	https://doi.org/10.1016/j.apradiso.2006.02.009
Publication status	Published - Oct 2006

Keywords

Activation
Charged particles
Thermonuclear fusion
Ultra low-level gamma-ray spectrometry
Underground laboratory

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10.1016/j.apradiso.2006.02.009

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title = "A low-level activation technique for monitoring thermonuclear fusion plasma conditions",

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.",

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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.

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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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DO - 10.1016/j.apradiso.2006.02.009

M3 - Article

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AN - SCOPUS:33751114441

SN - 0969-8043

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EP - 1135

JO - Applied Radiation and Isotopes

JF - Applied Radiation and Isotopes

IS - 10-11

ER -

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

Abstract

Keywords

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