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2. GSI-Accelerator facility

The GSI-Accelerator facility consists of three main parts:

2.1 the linear accelerator – UNILAC
2.2 the accelerator ring – SIS and
2.3 the storage ring – ESR.
2.4 Additionally a fragment separator – FRS is connected with the system.

2.1. Linear accelerator – UNILAC (UNIversal Linear ACcelerator), length 120m: Ions, e.g. charged atoms of all chemical elements can be accelerated by this accelerator unit up to 20 percent of the speed of light (60,000 km/s).

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2.1.a Linear accelerator UNILAC – Outer view.

2.1.b Linear accelerator UNILAC – Outer view.

UNILAC Inner view: This open form of the accelerator is only visible during maintenace work. The UNILAC is composed of three different, consecutive accelerator structurees.

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2.1.c Linear accelerator UNILAC – Inner view of the so-called Alvarez structure.

2.1.d Linear accelerator UNILAC – Inner view of the so-called Alvarez structure.

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2.1.e Linear accelerator UNILAC – Inner view of the so-called Alvarez structure.

2.1.f Linear accelerator UNILAC – Inner view of the so-called Alvarez structure.

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2.1.g Linear accelerator UNILAC – Inner view of the so-called RFQ structure.

2.1.h Linear accelerator UNILAC – Inner view of the so-called HI structure.

2.2. Accelerator ring - SIS (German: SchwerIonen-Synchrotron), circumference 216m: In the heavy-ion synchrotron SIS, the ion beam is further accelerated up to 90 percent of the speed of light (270,000 km/s) in the course of several hundred thousand revolutions.

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2.2.a Heavy-ion synchrotron SIS - Outer view. Red and yellow are the electromagnets which direct and focus the ion beam.

2.2.b Heavy-ion synchrotron SIS - Outer view. Red and yellow are the electromagnets which direct and focus the ion beam.

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2.2.c Heavy-ion synchrotron SIS – Inner view of the distance of acceleration (so-called cavity).

2.2.d Heavy-ion synchrotron SIS – Outer view of the distance of acceleration (so-called cavity).

2.3. Experiment Storage Ring – ESR (Experiment Storage ring), circumference 108m: Ions accelerated in the UNILAC and SIS can be stored in the ESR at very high speeds so as to use them in experiements.

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2.3.a Experiment Storage Ring ESR - Outer view.

2.3.b Experiment Storage Ring ESR - Outer view.

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2.3.c Experiment Storage Ring ESR - Magnet.

2.3.d Experiment Storage Ring ESR - Magnet.

2.4. Fragment separator – FRS (FRagment Separator), length 72m: The FRS is an optional connection between SIS and ESR, it is used to produce fragments from naturally occurring heavy nuclei. Directly after the production they are disposed to a experimental site or are stored in the ESR.

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2.4.a Fragment separator FRS - Outer view.

2.4.b Fragment separator FRS - Outer view.

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