|2012 - present
||Independent Research Group leader (ERC starting grant),|
Max-Planck-Institute for Nuclear Physics, Heidelberg, Germany .
||Research Scientist, Chemistry Department,
University of Illinois, Urbana-Champaign, Illinois, USA .
|| Postdoctoral Researcher, Astrophysics Laboratory,|
Columbia University, New York City, NY, USA.
||Postdoctoral Researcher, |
Max-Planck-Institute for Nuclear Physics, Heidelberg, Germany.
|| Dr. rer. nat (doctorate in nat. sciences) in Physics, Summa Cum Laude,
University of Heidelberg, Germany. Advisor: Professor Andreas Wolf.|
Thesis: Internal Excitations of Stored Triatomic Hydrogen Molecular Ions.
| 2000 Diploma
|| Diploma in Physics, University of Heidelberg. Advisors: Profs. Dirk
Schwalm and Andreas Wolf. Thesis: Coulomb Explosion Imaging of H3+.
|| Vordiplom in Physics, University of Siegen, Germany
|Winter Semester |
| Tutor Physics III |
(Quantum Mechanics and Optics)
| Summer Semester|
| Lecture: Molecular Astrophysics |
(with D. ASemenov MPIA)
| March 2007
|| Organizer high-school open day Physik am Samstagmorgen
at MPI-K Heidelberg.
|| Tutor, Seminar on At. and Mol. Physics, Heidelberg University.
|| Instructor Advanced Laboratory class, Heidelberg University.
|| Supervisor to ~10 diploma/graduate students.
|| Oak Ridge National Laboratory, Oak Ridge, TN, USA.
||Columbia University, New York City, USA.
||Weizmann Institute of Science, Rehovot, Israel.
|| NSF Proposal Review
|| Journal of Physical Chemistry.
|| Theoretical Chemistry Accounts.
|| Journal of Chemical Physics.
|| Journal of Physics: Conference Series.
|| Ion trap/laser laboratory, Max-Planck-Institute for Nuclear Physics.
Ion Deflector for two-dimensional control of ion beam cross sectional spread,
H. Kreckel, H. Bruhns, D.W. Savin, Columbia Technology Ventures, US utility patent application, serial number 12/708,886 (2009).
Principal Investigator, ERC Starting Grant 2012, ASTROLAB: Cold Collisions and the Pathways toward Life in Interstellar Space.
Co-Principal Investigator, D.W. Savin, H. Kreckel, Improved Understanding of Molecular Clouds
and Emission Line Objects with Laboratory Astrophysics Studies at the Heidelberg Ion Storage Ring,
NSF program: Galactic Astronomy, July 2008 - 2011.
| Designed and built ion optics and mass spectrometer for the SCRIBES (Sensitive Cooled Resolved Ion BEam Spectroscopy) instrument, enabling high-resolution cavity-enhanced spectroscopy with beams of astrophysically relevant molecular ions.
A.A. Mills et al., J. Chem. Phys. 135, 224201 (2011).
|Cavity Ringdown |
| Performed cavity ring-down spectroscopy of
para-enriched H3+ with a pulsed supersonic expansion source. Carried out high-resolution storage ring experiments of dissociative recombination of ortho- and para H3+.|
Kreckel et al., Phys. Rev. A 82, 042715 (2010).
|Nuclear Spin of |
| Model calculatons on the spin-temperature of interstellar H3+, considering the influence of dissociative recombination and collisions with H2.|
Crabtree et al., Astrophys. J. 729, 15 (2011).
|Molecular Hydrogen |
Formation in the
| Developed the first merged beams experiment for anion-neutral
chemistry. Performed energy-resolved measurements of the
associative detachment reaction H- + H → H2 + e, relevant for first star formation.|
Kreckel et al., Science 329, 69 (2010),
featured in: Science (Perspectives), 329, 45 (2010).
|Interstellar Model |
| Updated the Meudon PDR code to examine the influence of new atomic di-electronic recombination rates in
photon-dominated regions. |
Bryans et al., Astrophys. J. 694, 286 (2009).
|Structure and Stability |
| Performed Coulomb Explosion Imaging experiments, recording the wave function of the metastable molecular hydrogen anion H2.|
Jordon-Thaden et al., Phys. Rev. Lett. 107, 193003 (2011).
|Chemical Probing |
| Devised an ultra-sensitive infrared action spectroscopy scheme to
detect H3+ lines above the barrier to linearity. Observed the weakest
H3+ transitions recorded to date.|
Kreckel et al., J. Chem. Phys. 119, 164312 (2008).
of Cold H3+
| Performed Dissociative Recombination (DR) experiments with rovibrationally cold
H3+ ions using a cryogenic 22-pole ion trap injector. Carried out the first nuclear spin sensitive DR experiments.|
Kreckel et al., Phys. Rev. Lett. 95, 263201 (2005),
featured in: Nature (News and Views), 440, 157 (2005).
|Cryogenic rf |
| Constructed a cryogenic 22-pole radiofrequency (rf) ion trap for cooling of molecular ions down to 10 K. Devised an effective timing scheme to extract and inject H3+ ions into the TSR storage ring.|
Kreckel et al., J. Phys.: Conf. Ser. 4, 126 (2005)
Cooling of H3+
| Performed Coulomb Explosion Imaging experiments, recording the wave functions of single H3+ ions at the TSR storage ring to monitor vibrational
cooling. Created a comprehensive rovibrational relaxation model, solving
for the radiative decay. |
Kreckel et al., New J. Phys. 6, 151 (2004).
Kreckel et al, Phys. Rev. A 66, 052509 (2002).
|11. SMILES 2010, Spectroscopy of Molecular Ions in the Laboratory and in (Extraterrestrial) Space, Kos, Greece, "Experimental results for H2 formation from H- and H and implications for first star formation".
|10. DR 2010, The 8th International Conference on Dissociative Recombination, Granlibakken, Lake Tahoe, CA, USA, "Storage ring measurements of the dissociative recombination of H3+: a closer look".
|9. DAMOP 2010, Division of Atomic Molecular and Optical Physics of the American Physical Society. Houston, TX, USA, "Molecular hydrogen formation in the early universe: new implications from laboratory measurements".
|8. PCSIB 2008, Symposium on Physics with Cold Stored Ion Beams, Heidelberg, Germany, "Neutral-ion collisions in merged beams experiments".
|7. ICPEAC 2007, The XXV International Conference on Photonic, Electronic, and Atomic Collisions, Freiburg, Germany, "Electron collisions and rovibrational action spectroscopy of cold H3+ molecules".
|6. RF 2006, Symposium on RF ion traps: Technique and Applications in Reaction Dynamics and Spectroscopy, Chemnitz, Germany, "Preparing a state selected H3+ beam using a storage ion source and a 22 pole trap".
|5. RSM 2006, Royal Society Meeting on Physics, Chemistry and Astronomy of H3+, London, UK, "Rotational and vibrational cooling of H3+ in laboratory experiments".
|4. ESF 2005, European Science Foundation Exploratory Workshop on Ultracold Chemistry, Mulhouse, France, "The low temperature frontier in molecular ion collision experiments".
|3. DR 2004, The 6th International Conference on Dissociative Recombination, Mosbach, Germany, "Towards state selective measurements of the H3+ DR rate coefficient".
|2. ETR 2001, European Training Network Meeting on Electron Transfer Reactions, Prague, Czech Republic, "Monitoring internal
excitations at the TSR".
|1. SALA 2000, Meeting on Atomic and Molecular Physics with Accelerators, Aarhus, Denmark, "Lifetimes of excited states of H3+ studied by Coulomb explosion imaging".
|6. Université Catholique de Louvain, Louvain-La-Neuve, March 25th 2011. |
|5. Astronomy Colloquium, University of Illinois, Urbana-Champaign, November 17th 2009.
|4. Colloquium, Institute for Isotope Research and Nuclear Physics, Vienna, May 4th 2006.
|3. Kaffeepalaver, Max-Planck-Institute for Nuclear Physics, November 10th 2005.
|2. Quantenseminar, Freiburg University, November 23rd 2005.
|1. Kaffeepalaver, Max-Planck-Institute for Nuclear Physics, July 27th 2000.
|6. Max-Planck-Institut f\"ur Kernphysik, Heidelberg, Germany, June 15th 2011.
|5. University of Illinois at Urbana-Champaign, USA, June 27th 2008.
|4. Chicago University, USA, August 18th 2005.
|3. University of California San Diego, USA, December 3rd 2005.
|2. Weizmann Institute of Science, Rehovot, Israel, May 20th 2004.
|1. Chemnitz University, Germany, June 23rd 2000.