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SUMMARY:Steven Jepeal (PhD candidate at MIT)
DTSTART:20200618T160000Z
DTEND:20200618T180000Z
DTSTAMP:20260404T131146Z
UID:NUCLEAR_FUSION/1
DESCRIPTION:Title: Predicting fusion radiation damage using protons\nby Ste
ven Jepeal (PhD candidate at MIT) as part of Talks on contemporary researc
h in magnetic confinement nuclear fusion\n\n\nAbstract\nThe interior of a
fusion power plant will be an extreme radiation environment\, outside the
realm of humanities experience with radiation sources like fission reactor
s. The materials that make up these power plants must withstand heavy expo
sure to high energy neutrons\, which damage materials\, degrading their pr
operties\, and driving the components towards failure. Without the ability
to accurately reproduce the expected neutron environment through experime
ntation or simulation\, the first fusion power plants face enormous risk o
f radiation-induced failure of their key components. In order to improve o
ur ability to predict material performance under fusion neutron irradiatio
n\, we need new experimental methods for high-fidelity radiation damage te
sting. Intermediate energy (10-30 MeV) proton irradiation is an under-util
ized irradiation technique that could produce radiation damage with high f
idelity to a fusion environment Recently\, advances in particle accelerato
r technology have allowed sources of intermediate energy (10+ MeV) protons
to become commercially available at a cost and size appropriate for unive
rsity labs. This talk will give a high-level overview of our work to demon
strate through simulations\, theoretical analysis\, and experimentation\,
that protons could play a pivotal role in predicting fusion material perfo
rmance\, ultimately improving the probability of the success of fusion as
a global power source.\n
LOCATION:https://stable.researchseminars.org/talk/NUCLEAR_FUSION/1/
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SUMMARY:Remi Delaporte-Mathurin (IRFM\,CEA)
DTSTART:20200709T160000Z
DTEND:20200709T180000Z
DTSTAMP:20260404T131146Z
UID:NUCLEAR_FUSION/2
DESCRIPTION:Title: Tracking hydrogen in ITER's tungsten plasma facing component
s\nby Remi Delaporte-Mathurin (IRFM\,CEA) as part of Talks on contempo
rary research in magnetic confinement nuclear fusion\n\n\nAbstract\nHydrog
en is one of the key ingredients for fusion energy. During operations\, to
kamak walls are under bombardment of highly energetic hydrogen ions\, whic
h can penetrate the materials. Knowing the hydrogen content of these plasm
a-facing materials is crucial for several reasons. First from a safety poi
nt of view\, the tritium content in the inner-vessel of the tokamak is lim
ited to 700 g. Secondly\, tritium penetrating the first wall material coul
d reach the cooling system which must then be purified. Finally\, hydrogen
can brittle the materials and therefore reduce the lifetime of plasma fac
ing components. The behaviour of hydrogen can be investigated by lab exper
iments but also simulated with thermokinetic models which is the topic of
this talk. We’ll present the finite element code FESTIM developed by CEA
and CNRS. A particular focus is made on ITER divertor and tungsten monobl
ocks and hydrogen retention is estimated in the whole divertor.\n
LOCATION:https://stable.researchseminars.org/talk/NUCLEAR_FUSION/2/
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SUMMARY:Dr. Francisco Javier Artola Such (ITER)
DTSTART:20200724T160000Z
DTEND:20200724T170000Z
DTSTAMP:20260404T131146Z
UID:NUCLEAR_FUSION/3
DESCRIPTION:Title: Coupling plasma and wall currents for disruption simulations
\nby Dr. Francisco Javier Artola Such (ITER) as part of Talks on conte
mporary research in magnetic confinement nuclear fusion\n\n\nAbstract\nThe
talk will be about disruptions events that can arise in tokamaks producin
g large heat and electromagnetic loads on the structures surrounding the p
lasma. The dynamics of these events are complex and 3D simulations are req
uired to understand present experiments and to assist the design and opera
tion of future machines. Disruptions induce wall currents which in turn de
termine the plasma motion\, therefore it is necessary to couple these curr
ents to the plasma in a self-consistent form. In the presentation\, differ
ent methods for such coupling are explained for 3D MHD codes and examples
of 3D MHD simulations of Vertical Displacement Events (VDEs) are also pres
ented.\nJoin the talk via the Zoom link "zoom.us/s/82145836365" using the
password "593D9FBA" (without quotations) on Friday\, 24/07/2020 at 18:00 H
rs. (CET\, Prague).\nFor more details\, visit\nhttps://fusionep-talks.egyp
lasma.com/events/event.php?eventID=28\n
LOCATION:https://stable.researchseminars.org/talk/NUCLEAR_FUSION/3/
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SUMMARY:Florian Laggner\, PhD (PPPL\, princeton)
DTSTART:20200903T160000Z
DTEND:20200903T180000Z
DTSTAMP:20260404T131146Z
UID:NUCLEAR_FUSION/4
DESCRIPTION:Title: Diagnosing fusion plasmas: from concept to reality Implement
ing LLAMA to measure the edge neutral density in DIII-D\nby Florian La
ggner\, PhD (PPPL\, princeton) as part of Talks on contemporary research i
n magnetic confinement nuclear fusion\n\n\nAbstract\nThe fundamental under
standing of the behavior of fusion plasmas is based on sophisticated measu
rements that allow non-invasive diagnosis of certain parameters. This pres
entation outlines the path from the need to determine a certain quantity\,
to a conceptual measurement principle towards an actual implementation on
a fusion device\, using the example of the LLAMA diagnostic. LLAMA stands
for Lyman-Alpha Measurement Apparatus\, a multi-channel\, bandpass filter
pinhole camera system and has been recently installed at DIII-D. It measu
res the Lyman-Alpha brightness profiles at the plasma edge\, enabling the
inference of edge neutral density profiles to study sourcing of plasma par
ticles. This opens a previously hardly accessible field of studies with sp
ecific importance when scaling towards large scale future fusion devices\,
where the sourcing from neutrals is expected to be drastically reduced.\n
LOCATION:https://stable.researchseminars.org/talk/NUCLEAR_FUSION/4/
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BEGIN:VEVENT
SUMMARY:Prof. Guido van Oost
DTSTART:20200914T150000Z
DTEND:20200914T160000Z
DTSTAMP:20260404T131146Z
UID:NUCLEAR_FUSION/5
DESCRIPTION:Title: The European Master in Fusion Science and Engineering Physic
s\nby Prof. Guido van Oost as part of Talks on contemporary research i
n magnetic confinement nuclear fusion\n\nAbstract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/NUCLEAR_FUSION/5/
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SUMMARY:Sam Gibson\, PhD candidate (Durham University/UKAEA)
DTSTART:20201015T140000Z
DTEND:20201015T150000Z
DTSTAMP:20260404T131146Z
UID:NUCLEAR_FUSION/6
DESCRIPTION:Title: Measurement of the Current Profile in Tokamak Fusion Plasmas
\nby Sam Gibson\, PhD candidate (Durham University/UKAEA) as part of T
alks on contemporary research in magnetic confinement nuclear fusion\n\nAb
stract: TBA\n
LOCATION:https://stable.researchseminars.org/talk/NUCLEAR_FUSION/6/
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SUMMARY:Andrew Nelson (Princeton University)
DTSTART:20201105T160000Z
DTEND:20201105T170000Z
DTSTAMP:20260404T131146Z
UID:NUCLEAR_FUSION/7
DESCRIPTION:Title: A practical introduction to the H-mode pedestal: ELM and ELM
-free regimes\nby Andrew Nelson (Princeton University) as part of Talk
s on contemporary research in magnetic confinement nuclear fusion\n\nAbstr
act: TBA\n
LOCATION:https://stable.researchseminars.org/talk/NUCLEAR_FUSION/7/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Dr. Alena Gogoleva (UC3M\,Madrid)
DTSTART:20201111T150000Z
DTEND:20201111T160000Z
DTSTAMP:20260404T131146Z
UID:NUCLEAR_FUSION/8
DESCRIPTION:Title: Trap your alphas: fast particle motion in fusion plasmas
\nby Dr. Alena Gogoleva (UC3M\,Madrid) as part of Talks on contemporary re
search in magnetic confinement nuclear fusion\n\n\nAbstract\nOne of the ma
in difficulties to attain economically viable magnetically controlled ther
monuclear fusion reactors is the confinement of alpha particles. In toroid
ally shaped fusion devices with a non-uniform magnetic field\, alpha parti
cles with small parallel velocity become trapped between areas of the high
field\, bouncing between reflection points\, that might result in non-zer
o radial average drifts and their losses. This talk aims to highlight the
link between the alpha particle transport and the confining magnetic field
with an emphasis on the trapped particle characterization.\n
LOCATION:https://stable.researchseminars.org/talk/NUCLEAR_FUSION/8/
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