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RESEARCH PRODUCT
Low-level gamma-ray spectrometry for analysing fusion plasma conditions
Matthias LaubensteinH. DombrowskiP. VermaerckeJ.s. Elisabeth WieslanderJ.s. Elisabeth WieslanderDirk ArnoldG. BonheureGerd MarissensMikael HultJoël Gasparrosubject
PhysicsNuclear and High Energy PhysicsRadionuclideTokamakThermonuclear fusionAnalytical chemistryPlasmaMass spectrometryCharged particlelaw.inventionlawNeutronAtomic physicsInstrumentationGamma ray spectrometrydescription
Abstract A new method, combining activation by neutrons and charged particles with ultra low-level gamma-ray spectrometry, aimed at obtaining a better understanding and more adequate measurements of MeV particle leaks in magnetic fusion devices was studied here. A total of 36 samples containing Ti, LiF, B 4 C and W were placed in a boron-nitride holder mounted on the ceiling of the JET Tokamak. The samples were activated by 63 pulses from a D– 3 He plasma and were later measured using underground gamma-ray spectrometry. The radionuclides 7 Be, 46 Sc, 54 Mn, 56 Co, 57 Co, 58 Co, 124 Sb, 181 Hf, 182 Ta, 181 W and 185 W were detected in several of the samples, with very low levels of activity of 47 Sc and 48 V found in a few of the samples. The various production channels for the radionuclides in question are discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-06-01 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |