Wolfgang Jacob | Max Planck Institute for plasma physics (original) (raw)

Papers by Wolfgang Jacob

Research paper thumbnail of Measurement and modeling of neutral, radical, and ion densities in H2-N2-Ar plasmas

Journal of Applied Physics, 2015

Research paper thumbnail of Wall loss of atomic nitrogen determined by ionization threshold mass spectrometry

Journal of Applied Physics, 2014

Research paper thumbnail of Structure of plasma-deposited amorphous hydrogenated boron-carbon thin films

Research paper thumbnail of Quantitative analysis of deuterium in a-C:D layers, a Round Robin experiment

Journal of Nuclear Materials, 2000

Research paper thumbnail of Deuterium retention in tungsten films deposited by magnetron sputtering

Research paper thumbnail of Erosion and Deposition Chemistry in N2 Containing Discharges and Fuel Removal in Tile Gaps and Castellations by O2 Plasmas

Research paper thumbnail of Elementary Surface Processes during Growth of a-C:H Films

Research paper thumbnail of Chemical Sputtering oder Was treiben die Wasserstoffatome und Ionen gemeinsam auf der Oberfläche von a-C:H-Schichten?

Research paper thumbnail of Studying synergistic effects in chemical sputtering using dual beam irradiation

Research paper thumbnail of Massenaufgelöste Ionenflüsse aus Wasserstoff-Argon-Niedertemperaturentladungen: Vergleich Experiment - Modell

Research paper thumbnail of Technical Developments for Harnessing Controlled Fusion

Handbook of Nuclear Chemistry, 2011

This chapter gives the conditions for achieving power production using nuclear fusion reactions. ... more This chapter gives the conditions for achieving power production using nuclear fusion reactions. The two basic schemes for plasma confinement, inertial and magnetic, are briefly considered and the present technical solutions are outlined. The physical and chemical processes taking place between the hot plasma and the containing vessel wall are discussed in more detail. At the end of the chapter, the present status of research and the planned future development plans are summarized.

Research paper thumbnail of Kohlenstoff und die Plasma-Wand-Wechselwirkung

In the Materials Science Department of IPP processes of the plasma surface interaction in fusion ... more In the Materials Science Department of IPP processes of the plasma surface interaction in fusion devices are investigated. In this article, experiments in the device MAJESTIX are reported. This de- vice is devoted to the investigation of microscopic processes relevant to the interaction of hydrogen, hydrocarbon radicals, and ions with carbon surfaces. These processes are of particular importance in plasma surface interaction in fusion devices. Im Bereich Materialforschung des IPP werden Materialien entwickelt und untersucht, die dem Plasma zugewandt sind und den entsprechenden Belastungen aus dem Plasma standhalten müssen. Hierzu ist die genaue Erforschung der Plasma-Wand-Wechselwirkung notwendig, die über die auftretenden Be- lastungen und das Verhalten der Werkstoffe Aufschluss geben soll. Mithilfe dieser Kenntnisse können dann möglichst robuste Materialien für die plasmabelasteten Komponenten entwickelt und getestet werden. Für Komponenten, deren Oberfläche hohen Wärmelasten ausg...

Research paper thumbnail of An inverse photoemission study of CO adsorption on clean and potassium promoted Ru(001)

Surface Science, 1987

ABSTRACT

Research paper thumbnail of The energy influx during plasma deposition of amorphous hydrogenated carbon films

Surface and Coatings Technology, 2002

The integral energy influx from the plasma to the substrate was determined for amorphous hydrogen... more The integral energy influx from the plasma to the substrate was determined for amorphous hydrogenated carbon (aC:H) film deposition by magnetron sputtering and in an electron cyclotron resonance (ECR) discharge. The measurements, for which a thermal probe was designed, are ...

Research paper thumbnail of Technical Developments for Harnessing Controlled Fusion

This chapter gives the conditions for achieving power production using nuclear fusion reactions. ... more This chapter gives the conditions for achieving power production using nuclear fusion reactions. The two basic schemes for plasma confinement, inertial and magnetic, are briefly considered and the present technical solutions are outlined. The physical and chemical processes taking place between the hot plasma and the containing vessel wall are discussed in more detail. At the end of the chapter, the present status of research and the planned future development plans are summarized.

Research paper thumbnail of Release of deuterium from carbon-deuterium films on beryllium during carbide formation and oxidation

Journal of Nuclear Materials, 1997

Amorphous carbon-deuterium (a-C:D) films on beryllium substrates were vacuum annealed while the c... more Amorphous carbon-deuterium (a-C:D) films on beryllium substrates were vacuum annealed while the composition versus depth was followed using Rutherford backscattering, elastic recoil detection and Auger electron spectroscopy. The a-C:D film reacts with the Be substrate to form stoichiometric beryllium carbide, Be2C. The reaction begins at the interface and progresses through the film around 500°C until the entire film has reacted. D is absent from the reacted portion of the film but is still present in the unreacted carbon. The a-C:D films are removed from the Be without forming carbide by heating in oxygen at 400°C. Ion beam analysis was also used to study the oxidation of Be at temperatures up to 680°C. Through sequential exposures to different isotopes of oxygen it was shown that oxidation occurs by permeation of Be from the metal/oxide interface to the outer surface.

Research paper thumbnail of Study of gross and net erosion in the ASDEX Upgrade divertor

Journal of Nuclear Materials, 1997

Erosion of carbon and tungsten in the divertor of ASDEX Upgrade was investigated by surface analy... more Erosion of carbon and tungsten in the divertor of ASDEX Upgrade was investigated by surface analysis of target tile probes. The probes were exposed in the divertor using a manipulator system. Erosion of carbon was measured by graphite probes covered with a 150 nm layer of ~3C isotope to distinguish from the intrinsic carbon content. Tungsten erosion was measured by similar probes with 1-20 nm tungsten markers evaporated on the surface. From the measured erosion, sputtering yields were determined using plasma parameters at the target plates obtained from flush mounted Langmuir probes.

Research paper thumbnail of Pyrolysis and laser ablation of plasma-polymerized fluorocarbon films: Effects of gold particles

Journal of Applied Physics, 1992

Page 1. Pyrolysis and laser ablation of plasma-polymerized fluorocarbon films: Effects of gold pa... more Page 1. Pyrolysis and laser ablation of plasma-polymerized fluorocarbon films: Effects of gold particles William FL Creasy and Jeffrey A. Zimmerman IBM Corporation, Dept. T67, P. 0. Box 8003, Endicott, New York 13760 Wolfgang ...

Research paper thumbnail of Transport and structural modification during nitrogen implantation of hard amorphous carbon films

Journal of Applied Physics, 1998

ABSTRACT

Research paper thumbnail of Study of gross and net erosion in the ASDEX upgrade divertor

Journal of Nuclear Materials, 1997

Erosion of carbon and tungsten in the divertor of ASDEX Upgrade was investigated by surface analy... more Erosion of carbon and tungsten in the divertor of ASDEX Upgrade was investigated by surface analysis of target tile probes. The probes were exposed in the divertor using a manipulator system. Erosion of carbon was measured by graphite probes covered with a 150 nm layer of 13C isotope to distinguish from the intrinsic carbon content. Tungsten erosion was measured by

Research paper thumbnail of Measurement and modeling of neutral, radical, and ion densities in H2-N2-Ar plasmas

Journal of Applied Physics, 2015

Research paper thumbnail of Wall loss of atomic nitrogen determined by ionization threshold mass spectrometry

Journal of Applied Physics, 2014

Research paper thumbnail of Structure of plasma-deposited amorphous hydrogenated boron-carbon thin films

Research paper thumbnail of Quantitative analysis of deuterium in a-C:D layers, a Round Robin experiment

Journal of Nuclear Materials, 2000

Research paper thumbnail of Deuterium retention in tungsten films deposited by magnetron sputtering

Research paper thumbnail of Erosion and Deposition Chemistry in N2 Containing Discharges and Fuel Removal in Tile Gaps and Castellations by O2 Plasmas

Research paper thumbnail of Elementary Surface Processes during Growth of a-C:H Films

Research paper thumbnail of Chemical Sputtering oder Was treiben die Wasserstoffatome und Ionen gemeinsam auf der Oberfläche von a-C:H-Schichten?

Research paper thumbnail of Studying synergistic effects in chemical sputtering using dual beam irradiation

Research paper thumbnail of Massenaufgelöste Ionenflüsse aus Wasserstoff-Argon-Niedertemperaturentladungen: Vergleich Experiment - Modell

Research paper thumbnail of Technical Developments for Harnessing Controlled Fusion

Handbook of Nuclear Chemistry, 2011

This chapter gives the conditions for achieving power production using nuclear fusion reactions. ... more This chapter gives the conditions for achieving power production using nuclear fusion reactions. The two basic schemes for plasma confinement, inertial and magnetic, are briefly considered and the present technical solutions are outlined. The physical and chemical processes taking place between the hot plasma and the containing vessel wall are discussed in more detail. At the end of the chapter, the present status of research and the planned future development plans are summarized.

Research paper thumbnail of Kohlenstoff und die Plasma-Wand-Wechselwirkung

In the Materials Science Department of IPP processes of the plasma surface interaction in fusion ... more In the Materials Science Department of IPP processes of the plasma surface interaction in fusion devices are investigated. In this article, experiments in the device MAJESTIX are reported. This de- vice is devoted to the investigation of microscopic processes relevant to the interaction of hydrogen, hydrocarbon radicals, and ions with carbon surfaces. These processes are of particular importance in plasma surface interaction in fusion devices. Im Bereich Materialforschung des IPP werden Materialien entwickelt und untersucht, die dem Plasma zugewandt sind und den entsprechenden Belastungen aus dem Plasma standhalten müssen. Hierzu ist die genaue Erforschung der Plasma-Wand-Wechselwirkung notwendig, die über die auftretenden Be- lastungen und das Verhalten der Werkstoffe Aufschluss geben soll. Mithilfe dieser Kenntnisse können dann möglichst robuste Materialien für die plasmabelasteten Komponenten entwickelt und getestet werden. Für Komponenten, deren Oberfläche hohen Wärmelasten ausg...

Research paper thumbnail of An inverse photoemission study of CO adsorption on clean and potassium promoted Ru(001)

Surface Science, 1987

ABSTRACT

Research paper thumbnail of The energy influx during plasma deposition of amorphous hydrogenated carbon films

Surface and Coatings Technology, 2002

The integral energy influx from the plasma to the substrate was determined for amorphous hydrogen... more The integral energy influx from the plasma to the substrate was determined for amorphous hydrogenated carbon (aC:H) film deposition by magnetron sputtering and in an electron cyclotron resonance (ECR) discharge. The measurements, for which a thermal probe was designed, are ...

Research paper thumbnail of Technical Developments for Harnessing Controlled Fusion

This chapter gives the conditions for achieving power production using nuclear fusion reactions. ... more This chapter gives the conditions for achieving power production using nuclear fusion reactions. The two basic schemes for plasma confinement, inertial and magnetic, are briefly considered and the present technical solutions are outlined. The physical and chemical processes taking place between the hot plasma and the containing vessel wall are discussed in more detail. At the end of the chapter, the present status of research and the planned future development plans are summarized.

Research paper thumbnail of Release of deuterium from carbon-deuterium films on beryllium during carbide formation and oxidation

Journal of Nuclear Materials, 1997

Amorphous carbon-deuterium (a-C:D) films on beryllium substrates were vacuum annealed while the c... more Amorphous carbon-deuterium (a-C:D) films on beryllium substrates were vacuum annealed while the composition versus depth was followed using Rutherford backscattering, elastic recoil detection and Auger electron spectroscopy. The a-C:D film reacts with the Be substrate to form stoichiometric beryllium carbide, Be2C. The reaction begins at the interface and progresses through the film around 500°C until the entire film has reacted. D is absent from the reacted portion of the film but is still present in the unreacted carbon. The a-C:D films are removed from the Be without forming carbide by heating in oxygen at 400°C. Ion beam analysis was also used to study the oxidation of Be at temperatures up to 680°C. Through sequential exposures to different isotopes of oxygen it was shown that oxidation occurs by permeation of Be from the metal/oxide interface to the outer surface.

Research paper thumbnail of Study of gross and net erosion in the ASDEX Upgrade divertor

Journal of Nuclear Materials, 1997

Erosion of carbon and tungsten in the divertor of ASDEX Upgrade was investigated by surface analy... more Erosion of carbon and tungsten in the divertor of ASDEX Upgrade was investigated by surface analysis of target tile probes. The probes were exposed in the divertor using a manipulator system. Erosion of carbon was measured by graphite probes covered with a 150 nm layer of ~3C isotope to distinguish from the intrinsic carbon content. Tungsten erosion was measured by similar probes with 1-20 nm tungsten markers evaporated on the surface. From the measured erosion, sputtering yields were determined using plasma parameters at the target plates obtained from flush mounted Langmuir probes.

Research paper thumbnail of Pyrolysis and laser ablation of plasma-polymerized fluorocarbon films: Effects of gold particles

Journal of Applied Physics, 1992

Page 1. Pyrolysis and laser ablation of plasma-polymerized fluorocarbon films: Effects of gold pa... more Page 1. Pyrolysis and laser ablation of plasma-polymerized fluorocarbon films: Effects of gold particles William FL Creasy and Jeffrey A. Zimmerman IBM Corporation, Dept. T67, P. 0. Box 8003, Endicott, New York 13760 Wolfgang ...

Research paper thumbnail of Transport and structural modification during nitrogen implantation of hard amorphous carbon films

Journal of Applied Physics, 1998

ABSTRACT

Research paper thumbnail of Study of gross and net erosion in the ASDEX upgrade divertor

Journal of Nuclear Materials, 1997

Erosion of carbon and tungsten in the divertor of ASDEX Upgrade was investigated by surface analy... more Erosion of carbon and tungsten in the divertor of ASDEX Upgrade was investigated by surface analysis of target tile probes. The probes were exposed in the divertor using a manipulator system. Erosion of carbon was measured by graphite probes covered with a 150 nm layer of 13C isotope to distinguish from the intrinsic carbon content. Tungsten erosion was measured by