Winfred Stoffels STOOR. Plasma research at the group EPG Winfred Stoffels.

Winfred Stoffels STOOR

Plasma research at the group EPG

Winfred Stoffels


EPG: Reseach

Aim:

Understanding of technological plasmas

Approach:

Systematic combination of polydiagnostic experimental work with (numerical) plasmamodels

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What is a plasma?

•Ionised gas (by electricity, radiation, chemical energy, heat, etc.)•Source of: - energy

- ions- radicals- light

A+, B-, e, radicals

+ -


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


EPG: people

Groupleader: Gerrit Kroesen

Scientific staff: 5

Part time professor: 2

Technical support: 4

Postdocs: ~3

PhD students: ~15

(under)graduates/visitors: varying


Corona Eddie van Veldhuizen, Sander Nijdam, Tanja Briels


Plasma treatment of living tissues (Eva Stoffels, Roxana Tipa)


Complex plasmas Winfred Stoffels, Job Beckers


EUV plasmas Joost van der Mullen, ASML


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


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)


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


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


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


After graduation at EPG

~50% PhD study at EPG, PMP or other groups

~50% industrial R&D

Philips

ASML

other companies


Welcome at EPG

N laag

Second floor

C wing (above first year practicum)

Winfred Stoffels STOOR. Plasma research at the group EPG Winfred Stoffels.

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