HEST

HEST is an abbreviation from "High-Energy Beam Lines" (in German: Hochenergie-Strahlfuhrung). It is a complex set of beam lines between the SIS18, ESR, Cryring and the experiments in Targethalle. Total length of all beam lines is about 600 meters, with more than 100 main magnets. The beam lines extend over three interconnected buildings called Transferhalle (TR), Neue Experimenterhalle (EX) and Targethalle (TH).

There are 12 main experimental locations: Hades, HHD (dumpline, sometimes used for various beam measurements), HFS (Fragment Separator), ESR (storage ring used for experiments), HiTrap (using the beam from ESR), HHT (plasme), HTM (medical research), HTA (two setups: for atomic physics and biophysics), HTB (injection to Cryring), HTC (nuclear physics), HTP (far dump and beam instrumentation) and HTD (mini-CBM, detector beam test).

On the Figure below the whole area can be seen. Responsability of HEST Machine Koordinator starts with the first vacuum valve after SIS and usually ends with the last valve before the experiment, however there are many exceptions.

More detailed planes of the Target Halle layout are here (pdf):

Very useful plan of whole GSI is here: 20160512_Gesamtplan_GSI_Maschinen_aktualisiert_lesbar.pdf

Experiments use various segments of beamlines and quite often the same segment is used by a different beam production chain. This is illustrated in the plot showing HEST segments. For example, to reach ESR beam can go via nodes 31, 32, 35, 36 or via nodes 33, 33, 36. In total there are more than 20 optics files. Below is a list of currently used beam paths, grouped according to the beam destination:

Other aspects: