Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Orbiting Cryogenic Molecules


First experiment in the cryogenic storage ring CSR of the Max Planck Institute for Nuclear Physics

After years of development and construction work, physicists of the MPI for Nuclear Physics now for the first time succeeded to hold negatively charged molecules, namely hydroxide ions (OH–), at a few degrees above absolute zero orbiting inside their novel storage ring and perform experiments with them.

Insights into the Cryogenic Storage Ring during the construction pase.

Photos: MPIK

Some of the ions are neutralized by a laser beam, such that few OH radicals leave the ring and are detected. Without laser this rate is extremely low, indicating an extremely good vacuum.

Graphics: MPIK

The CSR (Cryogenic Storage Ring), a world-wide unique electrostatic storage ring for ions, is designed for operation at lowest temperatures. It enables researchers to investigate the chemistry of interstellar clouds on Earth and to gain fundamental insight into the ‘inner life’ of molecules.

It took almost three weeks until the new ultra-cold Cryogenic Storage Ring (CSR) had reached a temperature of –265C, just a few degrees above absolute zero. During the cool-down phase the pressure inside the ring dropped to an estimated value of 10^–13 mbar, which is sixteen orders of magnitude lower than atmospheric pressure and very difficult to measure precisely.

Shortly afterwards a first milestone was accomplished by storing positively charged argon ions (Ar+) in the ring. These initial tests gave the green light for the first experiment. “We produced hydroxyl ions (OH–) in our ion source, injected them into the CSR and stored them on a stable orbit for more than 10 minutes – this alone constitutes a great success for our team”, explains Andreas Wolf, one of the experimental physicists who have been driving the development of the CSR, “however, now we had to find out whether the stored ions are really cooling down to interstellar temperatures.”

To this end a tunable laser system is used. The stored OH– ions are exposed to the laser beam, which can detach the extra electron and produce neutral OH radicals. The neutral OH particles are no longer stored by the electromagnetic fields of the ring – owing to the lack of an electric charge – and thus are ejected from the stable orbit and recorded by a dedicated detector.

Depending on the frequency of the laser (corresponding to the color of the light) the neutralization process addresses different energy levels of the OH– ions, indicating how much internal energy the ion possessed before it interacted with the laser light.

A first evaluation of the experimental data revealed that not only the internal vibrations of the OH– ions had decayed, but that also the rotational excitation of the majority of the stored OH– ions had reached the lowest quantum state, indicating that the ions are indeed cooling down to interstellar temperatures.

“It really appears that our new ‘machine’ is living up to all of our expectations” Klaus Blaum, director and head of the “Stored and Cooled Ions” division at MPIK, is pleased to report. “The CSR will be able to realize its full potential in our forthcoming experiments on the chemistry of interstellar space” adds Holger Kreckel, group leader of the ERC-financed ASTROLAB project at MPIK.

The commissioning of the CSR constitutes the successful completion of a novel technological realization of an ultra-cold storage ring at MPIK. “With its purely electrostatic ion optics, its extremely low pressure and low temperature, the CSR allows for the storage of large molecular ions in their lowest quantum states”, summarizes Robert von Hahn, who led the technological development of the CSR.

The physicists at MPIK now have access to a unique instrument for fundamental experiments with molecular ions and clusters. The MPIK is grateful to the Max Planck Society for providing the financial support for the development and realization of the CSR project. Furthermore, the Weizmann Institute of Science in Rehovot (Israel) also contributed to the realization of the CSR and future experiments will be carried out in collaboration with (amongst others) the Universities of Heidelberg, Giessen, Greifswald, and Kaiserslautern; Columbia University (New York City, USA) and the Université catholique de Louvain (Louvain-la-Neuve, Belgium).


Prof. Dr. Klaus Blaum
phone: +496221 516850

Dr. Robert von Hahn
phone: +496221 516396

Prof. Dr. Andreas Wolf
phone: +496221 516503

Dr. Holger Kreckel
phone: +496221 516517

Weitere Informationen: - The Cryogenic Storage Ring CSR (pdf) - Division Stored and Cooled Ions at the MPIK - ASTROLAB group at the MPIK

Dr. Bernold Feuerstein | Max-Planck-Institut für Kernphysik

More articles from Physics and Astronomy:

nachricht Novel light sources made of 2D materials
28.10.2016 | Julius-Maximilians-Universität Würzburg

nachricht OU-led team discovers rare, newborn tri-star system using ALMA
27.10.2016 | University of Oklahoma

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Novel light sources made of 2D materials

Physicists from the University of Würzburg have designed a light source that emits photon pairs. Two-photon sources are particularly well suited for tap-proof data encryption. The experiment's key ingredients: a semiconductor crystal and some sticky tape.

So-called monolayers are at the heart of the research activities. These "super materials" (as the prestigious science magazine "Nature" puts it) have been...

Im Focus: Etching Microstructures with Lasers

Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.

This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Steering a fusion plasma toward stability

28.10.2016 | Power and Electrical Engineering

Bioluminescent sensor causes brain cells to glow in the dark

28.10.2016 | Life Sciences

Activation of 2 genes linked to development of atherosclerosis

28.10.2016 | Life Sciences

More VideoLinks >>>