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Winfred Stoffels STOOR
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Plasma research at the group EPG
Winfred Stoffels
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Winfred Stoffels STOOR
EPG: Reseach
Aim:
Understanding of technological plasmas
Approach:
Systematic combination of polydiagnostic experimental work with (numerical) plasmamodels
`
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Winfred Stoffels STOOR
What is a plasma?
•Ionised gas (by electricity, radiation, chemical energy, heat, etc.)•Source of: - energy
- ions- radicals- light
A+, B-, e, radicals
+ -
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Winfred Stoffels STOOR
EPG: Themes
Plasma treatment of living tissues
Corona & pulsed discharges
Material science (rf and microwave, complex plasmas)
Extreme plasmas (EUV, laser wake field, hydrogen)
Light
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Winfred Stoffels STOOR
EPG: people
Groupleader: Gerrit Kroesen
Scientific staff: 5
Part time professor: 2
Technical support: 4
Postdocs: ~3
PhD students: ~15
(under)graduates/visitors: varying
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Winfred Stoffels STOOR
Corona Eddie van Veldhuizen, Sander Nijdam, Tanja Briels
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Winfred Stoffels STOOR
Plasma treatment of living tissues (Eva Stoffels, Roxana Tipa)
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Winfred Stoffels STOOR
Complex plasmas Winfred Stoffels, Job Beckers
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Winfred Stoffels STOOR
EUV plasmas Joost van der Mullen, ASML
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Winfred Stoffels STOOR
Light Winfred Stoffels, Philips
Tanya Nimalasuriya, Mark Beks, Arjan Flikweert:
Segregation and modeling of Metal halide lamps (ISS,
centrifuge)
Hjalmar Mulders: molecular lamps
Ana Sobota: ignition of HID lamps
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Winfred Stoffels STOOR
Plasma diagnostics
Electrons: Thomson (ne, Te)
absolute line intensity & Bolzmann/Saha (ne, Te,LTE)
microwave resonance
langmuir probes
Ions: massa spectrometry
Doppler resolved LIF (IEDF)
langmuir probes (ni,Ti)
absolute line intensity &Saha/Bolzmann (ni, Ti,LTE)
laser induced photo-detachment (neg ionen)
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Winfred Stoffels STOOR
Plasma diagnosticsAtoms & chemistry : absolute line intensity & Bolzmann/Saha (ne, Te,LTE)
laser absorptiom (atom/molecules )
FTIR (molecule chemistry)
LIF
XRA/XRF
ellipsometry (surface chemistry)
E-field: Stark splitting/shifting of Rydberg states (E-field)
probes (potential)
Dynamisch behavior: sub-ns cameras
I-V metingen
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Winfred Stoffels STOOR
Plasma model (Jan van Dijk)
modular numerical plasma model (2D3D)
particle and energy balance
elementary processes
gas flow (convection-diffusion)
radiation
energy coupling (dc, rf, microwave)
dynamic behavior
LTE & non-LTE
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Winfred Stoffels STOOR
Traineeships
Experimental, numerical or combined work on technological
plasmas
External traineeships: Philips, ASML, OCE, foreign university
Mostly together with a PhD student and staff member
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Winfred Stoffels STOOR
After graduation at EPG
~50% PhD study at EPG, PMP or other groups
~50% industrial R&D
Philips
ASML
other companies
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Winfred Stoffels STOOR
Welcome at EPG
N laag
Second floor
C wing (above first year practicum)