Twin GEM-TPC Prototype (HGB4) Beam Test at GSI and Jyv'askyl'a - a Development for the Super-FRS at FAIR

摘要

The FAIR[1] facility is an international accelerator centre for research withion and antiproton beams. It is being built at Darmstadt, Germany as anextension to the current GSI research institute. One major part of the facilitywill be the Super-FRS[2] separator, which will be include in phase one of theproject construction. The NUSTAR experiments will benefit from the Super-FRS,which will deliver an unprecedented range of radioactive ion beams (RIB). Theseexperiments will use beams of different energies and characteristics in threedifferent branches; the high-energy which utilizes the RIB at relativisticenergies 300-1500 MeV/u as created in the production process, the low-energybranch aims to use beams in the range of 0-150 MeV/u whereas the ring branchwill cool and store beams in the NESR ring. The main tasks for the Super-FRSbeam diagnostics chambers will be for the set up and adjustment of theseparator as well as to provide tracking and event-by-event particleidentification. The Helsinki Institute of Physics, and the Detector Laboratoryand Experimental Electronics at GSI are in a joint R&D of a GEM-TPC detectorwhich could satisfy the requirements of such tracking detectors, in terms oftracking efficiency, space resolution, count rate capability and momentaresolution. The current prototype, which is the generation four of this type,is two GEM-TPCs in twin configuration inside the same vessel. This means thatone of the GEM-TPC is flipped on the middle plane w.r.t. the other one. Thischamber was tested at Jyv\"askyl\"a accelerator with protons projectiles and atGSI with Uranium, fragments and Carbon beams during this year 2016.