International Doctoral College in Fusion Science and Engineering
 Thesis catalogue
Dust sampling and extraction techniques in low pressure environments
PhD Code: 2016-DC-10:
  • Host institute 1: AM07-Aix- Marseille Université (Home University) - FP8-Institut de Recherche sur la Fusion par confinement magnétique, Saint-Paul-lez-Durance, France (Home Institution)
  • Host institute 2: FP1-Ghent University (Host University) - AM04-ITER Organization (Host Institution)
  • Host institute 3: AM16-National Research Nuclear University Plasma Physics Department, MEPhI, Moscow, Russia
Research fields:
  • F2. Technology for ITER and beyond
  • Prof. Cecile Arnas (promotor)
  • Dr. Christian Grisolia (mentor)
  • Prof. Jean-Marie Noterdaeme (co-promotor)
  • Dr. Evgeny Veshchev (mentor)
  • Prof. Leon Begrambekov (co-promotor)
Contact Person and email: Evgeny VESHCHEV -

Subject description
Background: ITER is concerned with the generation, distribution, quality and tritium retention of dusts generated during machine operation. This dust is expected to be distributed in various areas and in particular in the lower regions of the machine. Inspection tools are foreseen that can diagnose aspects of the dust, in particular an in-vessel viewing system to check for the formation of surface films that can in turn generate dust, a surface heating system that can observe tritium-retaining deposit characteristics and a dust endoscope that is designed to examine optically and retrieve dust samples. This last system has successfully passed its conceptual review and its front end components are entering the detailed design phase.

Expected outcomes

Objective: Develop a dust sampling technique suitable for the front end of the dust monitor. Analyse existing techniques. Propose a design likely to meet the measurement needs. Design and have tested suitable laboratory scale prototypes. Devise sample handling, transfer and back-end analysis schemes. Time line and mobility scheme (research need to be performed for at least six month in two different countries): 1st year (October 2016-September 2017): Work scope that can be done at IRFM, France: - Introduction to dust collection methods and facilities to deal with dust - Development of methods for representative dust creation - Create dust at IRFM or with counterparts at MEPhI - Analysis of created dust properties - Export dust samples to KTH Work scope that can be done at KTH, Stokholm, Sweden: - Deposit dust on surfaces - Study and analyse dust properties for various experimental conditions - Export samples back to IRFM and MEPhI Work scope that can be done at MEPhI, Moscow, Russia: - Test sampling methods - Prepare design of mock-up of sampling head and test its efficiency on simple dust 2nd year: (October 2017-September 2018): Work scope that can be done at IRFM, France: - Derive mobilization criteria for different species of metallic dust - Prepare mobilizable dust for export to KTH - Prepare prototype piece of guide tube to be sent to KTH for dust deposition inside it - Prepare prototype sampling head for collection from flat and curved(tube) surface Work scope that can be done at KTH, Stokholm, Sweden : - Continue analysis of the experimental results. Publication. - Export of surfaces with deposited mobilizable dust from KTH to MEPhI - Preparing for dust collection experiment from flat surface and from surface of the tube. Work scope that can be done at Moscow, Russia: - Test various prototype configurations on any dust inside tube and on flat surfaces - Optimise head design - Test collection methods on “calibrated” dust from IRFM and KTH - Analyze results, define efficiency of methods. - Optimize sampling head and test 3rd year (October 2018-September 2019): Anywhere: - Finalize head design and finalizing thesis writing. - Publication



Original document: 2016-DC-10

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