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

Publikation: Beitrag in Fachzeitschrift › Artikel › Begutachtung

12 Zitate (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.

Originalsprache	Englisch
Seiten (von - bis)	1130-1135
Seitenumfang	6
Fachzeitschrift	Applied Radiation and Isotopes
Jahrgang	64
Ausgabenummer	10-11
DOIs	https://doi.org/10.1016/j.apradiso.2006.02.009
Publikationsstatus	Veröffentlicht - 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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doi = "10.1016/j.apradiso.2006.02.009",

language = "English",

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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

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AN - SCOPUS:33751114441

SN - 0969-8043

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JO - Applied Radiation and Isotopes

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IS - 10-11

ER -

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

Abstract

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