GSI Helmholtz Centre for Heavy Ion Research
GSI main entrance, Darmstadt, Germany
64291 Darmstadt, Germany
The GSI Helmholtz Centre for Heavy Ion Research (German: GSI Helmholtzzentrum für Schwerionenforschung GmbH) is a federally and state co-funded heavy ion (Schwerion) research center in the Arheilgen suburb of Darmstadt, Germany. It was founded in 1969 as the Society for Heavy Ion Research (German: Gesellschaft für Schwerionenforschung), abbreviated GSI, to conduct research on and with heavy-ion accelerators. It is the only major research center in the State of Hesse. The current director of GSI is Karlheinz Langanke who succeeded Horst Stöcker in 2015.
The laboratory performs basic and applied research in physics and related natural science disciplines. Main fields of study include plasma physics, atomic physics, nuclear structure and reactions research, biophysics and medical research. The lab is a member of the Helmholtz Association of German Research Centres.
Shareholders are the German Federal Government (90%) and the State of Hesse (10%). As a member of the Helmholtz Association, the current name was given to the facility on 7 October 2008 in order to bring it sharper national and international awareness.
The chief tool is the heavy ion accelerator facility consisting of UNILAC, the Universal Linear Accelerator (energy of 2 - 11.4 MeV per nucleon), SIS 18, the heavy-ion synchrotron (0.010 - 2 GeV/u) and ESR, the experimental storage ring (0.005 - 0.5 GeV/u) and FRS. The UNILAC was commissioned in 1975, the SIS 18 and the ESR were added in 1990 boosting the ion acceleration from 10% of light speed to 90%.
Another important technology developed at the GSI is the use of heavy ion beams for cancer treatment (from 1997). Instead of using X-ray radiation, carbon ions are used to irradiate the patient. The technique allows tumors which are close to vital organs to be treated, which is not possible with X-rays. This is due to the fact that the Bragg peak of carbon ions is much sharper than the peak of X-ray photons. A facility based on this technology, called Heidelberger Ionenstrahl-Therapiezentrum (HIT), built at the University of Heidelberg Medical Center began treating patients in November 2009.
Other parts of the facility
- Two high-energy lasers, the nhelix (Nanosecond High Energy Laser for Heavy Ion Experiments) and the Phelix (Petawatt High Energy Laser for Heavy Ion Experiments).
- A FRagment Separator (FRS) - The GSI Fragment Separator or FRS is a facility built in 1990. It produces and separates different beams of (usually) radioactive ions. The process is made from a stable beam accelerated by UNILAC and then SIS impinging on a production target. From this, many fragments are produced. The secondary beam is produced by magnetic selection of the ions.
- An Experimental Storage Ring (ESR)
In the years to come, GSI will evolve to an international structure named FAIR for Facility for Antiproton and Ion Research. The first beam was expected by 2018, two new synchrotrons (with respective magnetic rigidity 100 and 300 Tm), a Super-FRS and several new rings among which one that can be used for antimatter research.
The creation of FAIR was co-signed on 7 November 2007 by 10 countries: Finland, France, Germany, India, Romania, Russia, Slovenia, Sweden, United Kingdom, and Poland. Representatives included Annette Schavan, the German federal minister of science and Roland Koch, the prime minister of the state of Hesse.
- Pressemitteilung des GSI Helmholtzzentrums für Schwerionenforschung vom 20. Oktober 2008 (German)
- "One facility, thousand possibilities". GSI. 2014. Retrieved 22 December 2014.
- "Wanted: Suitable name for unstable, heavyweight element". The Guardian. 2009. Retrieved 22 December 2014.
- "History of HIT". Heidelberg Ion-Beam Therapy Center (HIT). 2009. Retrieved 22 December 2014.
- "How FAIR is being built". FAIR. 2013. Retrieved 22 December 2014.
- "Accelerators". FAIR. 2013. Retrieved 22 December 2014.
- "FAIR partner countries". FAIR. 2013. Retrieved 22 December 2014.