research & development

Shell Exploration & Production Oil & Gas

Rijswijk/The Hague/Amsterdam, Netherlands

Research Scientist & Principle Investigator

Rock & Fluid Science Team (since 2006)

Association with Imperial College as Visiting Reader in the Department of Earth Science and Chemical Engineering (since 2011).

Research Interests:

Fluid dynamics and reactive transport in Rocks

Geological sequestration of carbon dioxide:

CO₂ injection in depleted hydrocarbon fields and deep saline aquifers

Left: CO₂ injection in a brine saturated sandstone: Tomographic (CT) imaging of a drainage process (macroscopic scale). Right: microscopic fluid distribution (micro-CT imaging) in a porous medium: wetting fluid phase in blue and non-wetting fluid in whiter, porous medium transparent.

S. Berg, S. Oedai, and H. Ott, Displacement and Mass Transfer Between Saturated and Unsaturated CO₂–Brine Systems in Sandstone, Int. Jour. of Greenhouse Gas Control, 2011 in production.

A. Georgiadis, S. Berg, G. Maitland, and H. Ott, Pore Scale micro CT imaging: Non-wetting phase cluster size distribution during drainage and imbibition, SCA conference paper 2011, accepted.

Universität zu Köln

Cologne, Germany

PostDoc in the group of Prof. Liu Hao Teng (2004-2006)

Correlated electron systems:

XMCD on magnetic semiconductor thin films

Resonant X-ray scattering on magnetic, charge, orbital and defect order:

Left: Magnetic speckles: Coherent resonant soft X-ray scattering on AFM domains of ultra-thin Ho films. Middle: Resonant soft X-ray scattering on charge and orbital order in Magnetite. Right: Resonant X-ray scattering on the defect order in NbO single crystals (H. Ott at al. not published).

H. Ott, S. J. Heise, R. Sutarto, Z. Hu, C. F. Chang, H. H. Hsieh, H.-J. Lin, C. T. Chen, and L. H. Tjeng: Soft x-ray magnetic circular dichroism on Gd-doped EuO thin films, Phys. Rev. B 73, 094407 (2006).

J. Schlappa, C. Schüßler-Langeheine, C. F. Chang, H. Ott, A. Tanaka, Z. Hu, M. W. Haverkort, E. Schierle, E. Weschke, G. Kaindl, and L. H. Tjeng, Direct observation of t2g orbital ordering in magnetite, Phys. Rev. Lett. 100, 026406 (2008).

S. Konings, C. Schüßler-Langeheine, H. Ott, E. Weschke, E. Schierle, and J. Goedkoop, Magnetic domain fluctuations in an antiferromagnetic film observed with coherent resonant soft x-ray scattering, Submitted to Phys. Rev. Lett. (2008).

Tokyo, Japan

Fellowship of the German-Academic-Exchange-Service

Joint researcher in the group of Prof. Atsushi Fujimori (2002)

Photo-electron spectroscopy on Magnetic semiconductors

Y. Ishida, D. D. Sarma, K. Okazaki, J. Okabayashi, J. I. Hwang, H. Ott, A. Fujimori, G. A. Medvedkin, T. Ishibashi, and K. Sato: In situ Photoemission Study of the Room Temperature Ferromagnet ZnGeP2:Mn, Phys. Rev. Lett. 91, 107202 (2003).

Freie Universität Berlin

Berlin, Germany

PhD in Physics (1999-2004) – grade: summa cum laude – in the group of Prof. Günter Kaindl

Resonance magnetic soft X-ray scattering on complex magnetic structures – transition from 3D to 2D

Left: Schematic of the magnetic structure of Holmium – projection onto the scattering plane. Right: X-ray reflectivity of a thin Ho film as function of photon energy.

H. Ott: Magnetic Structures and Phase Transitions in Thin Films of Heavy Lanthanide Metals Investigated by Resonant Magnetic X-Ray Scattering, Dissertation, Freie Universität Berlin (2004), ISBN 3-89825-932-3.

H. Ott, C. Schüßler-Langeheine, E. Schierle, G. Kaindl, and E. Weschke: Magnetic depth profiles from resonant soft x-ray scattering: Application to Dy thin films, Appl. Phys. Lett. 88, 212507(2006).

H. Ott, C. Schüßler-Langeheine, E. Schierle, A. Yu. Grigoriev, V. Leiner, H. Zabel, G. Kaindl, and E. Weschke: Magnetic X-Ray Scattering at the M5 absorption edge of Ho, Phys. Rev. B 74, 094412 (2006).

Award of the Wilhelm und Else Heraeus Foundation – Physik-Studienpreis für herausragende Absolventinnen und Absolventen

Diploma in Physics (1999): Magnetic properties of surface electronic structures: angle-resolved photon-electron spectroscopy (ARPES) and electron diffraction (LEED)

Left: High-resolution ARPES spectra from the clean (a) and the oxygen covered (b) Gd(0001) surface. Right: Zero-Kelvin splitting (filled cycles) and high-temperature residual splitting (open cycles) of surface state S2 versus the 4f-spin moment.

C. Schüßler-Langeheine, H. Ott, A. Yu. Grigoriev, A. Möller, R. Meier, Z. Hu, Chandan Mazumdar, G. Kaindl, and E. Weschke: Oxygen-induced magnetic surface states on the (0001) surfaces of the heavy lanthanide metals, Phys. Rev. B 65, 214410 (2002).

Study of Physics 1996-1999

Universität Stuttgart

Stuttgart, Germany

Study of physics 1994-1996

Stuttgart, Germany

Instrument mechanic (industrial training 1985-1988, employment 1988-1991)

Special tools for commutator manufacturing for the automotive industry, power tools and white Goods