Jean-Pierre H. van Helden
Jean-Pierre H. van Helden
Head of Department Plasma Diagnostics, Leibniz Institute for Plasma Science and Technology (INP)
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Direct and wavelength modulation spectroscopy using a cw external cavity quantum cascade laser
G Hancock, JH Van Helden, R Peverall, GAD Ritchie, RJ Walker
Applied Physics Letters 94 (20), 201110, 2009
Detailed study of the plasma-activated catalytic generation of ammonia in plasmas
JH Van Helden, W Wagemans, G Yagci, RAB Zijlmans, DC Schram, ...
Journal of applied physics 101 (4), 043305, 2007
Review on VUV to MIR absorption spectroscopy of atmospheric pressure plasma jets
S Reuter, JS Sousa, GD Stancu, JPH van Helden
Plasma Sources Science and Technology 24 (5), 054001, 2015
Demonstration of a mid-infrared cavity enhanced absorption spectrometer for breath acetone detection
L Ciaffoni, G Hancock, JJ Harrison, JPH van Helden, CE Langley, ...
Analytical chemistry 85 (2), 846-850, 2013
Sensitive trace gas detection with cavity enhanced absorption spectroscopy using a continuous wave external-cavity quantum cascade laser
JH van Helden, N Lang, U Macherius, H Zimmermann, J R÷pcke
Applied Physics Letters 103, 131114, 2013
Optical feedback cavity-enhanced absorption spectroscopy with a 3.24 μm interband cascade laser
KM Manfred, GAD Ritchie, N Lang, J R÷pcke, JH Van Helden
Applied Physics Letters 106 (22), 221106, 2015
Phase-shift cavity ring-down spectroscopy to determine absolute line intensities
JH van Helden, DC Schram, R Engeln
Chemical physics letters 400 (4-6), 320-325, 2004
Characterization of an external cavity diode laser based ring cavity NICE-OHMS system
CL Bell, G Hancock, R Peverall, GAD Ritchie, JH van Helden, ...
Optics express 17 (12), 9834-9839, 2009
Production Mechanisms of NH and NH2 Radicals in N2−H2 Plasmas
JH Van Helden, PJ Van Den Oever, WMM Kessels, MCM Van De Sanden, ...
The Journal of Physical Chemistry A 111 (45), 11460-11472, 2007
Density and production of NH and in an expanding plasma jet
PJ Van den Oever, JH Van Helden, CCH Lamers, R Engeln, DC Schram, ...
Journal of applied physics 98 (9), 093301, 2005
Applications of midinfrared quantum cascade lasers to spectroscopy
G Hancock, GAD Ritchie, JPH van Helden, R Walker, D Weidmann
Optical Engineering 49 (11), 111121, 2010
N, NH, and radical densities in a remote plasma and their role in silicon nitride deposition
PJ van den Oever, JH Van Helden, JL Van Hemmen, R Engeln, ...
Journal of applied physics 100 (9), 093303, 2006
Application of quantum cascade lasers in studies of low-pressure plasmas: Characterization of rapid passage effects on density and temperature measurements
JH Van Helden, SJ Horrocks, GAD Ritchie
Applied Physics Letters 92 (8), 081506, 2008
Bulk and surface defects in a-Si: H films studied by means of the cavity ring down absorption technique
AHM Smets, JH Van Helden, MCM Van de Sanden
Journal of non-crystalline solids 299, 610-614, 2002
Cavity enhanced techniques using continuous wave lasers
JH Van Helden, R Peverall, GAD Ritchie
Cavity Ring-Down Spectroscopy: Techniques and Applications, 27-56, 2009
Controlling the emission profile of an H2 discharge lamp to simulate interstellar radiation fields
NFW Ligterink, DM Paardekooper, KJ Chuang, ML Both, GA Cruz-Diaz, ...
Astronomy & Astrophysics 584, A56, 2015
Quantum cascade laser absorption spectroscopy of the 1← 0 band of deuterium bromide at 5 μm
RJ Walker, JH Van Helden, GAD Ritchie
Chemical Physics Letters 501 (1-3), 20-24, 2010
Time-resolved detection of the CF3 photofragment using chirped QCL radiation
G Hancock, SJ Horrocks, GAD Ritchie, JH van Helden, RJ Walker
The Journal of Physical Chemistry A 112, 9751, 2008
Detection of HO2 in an atmospheric pressure plasma jet using optical feedback cavity-enhanced absorption spectroscopy
M Gianella, S Reuter, AL Aguila, GAD Ritchie, JPH van Helden
New Journal of Physics 18 (11), 113027, 2016
Sensitive CH 4 detection applying quantum cascade laser based optical feedback cavity-enhanced absorption spectroscopy
N Lang, U Macherius, M Wiese, H Zimmermann, J R÷pcke, ...
Optics express 24 (6), A536-A543, 2016
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