Mainz 2012 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 35: Instrumentation
HK 35.9: Vortrag
Mittwoch, 21. März 2012, 18:45–19:00, P 3
Tagging and tracking of fission products with large scale emissive foil detectors — •Michael Pfeiffer1, Eleonora Gregor2, Plamen Boutachkov2, Gheorghe Pascovici1, Nigel Warr1, Stefan Thiel1, and Jan Jolie1 — 1IKP, Universität zu Köln — 2GSI, Darmstadt
In the context of the future HISPEC/DESPEC facility at the the low energy branch of the Super-FRS at FAIR a setup for slowed down beams is planned. With this facility, short lived, fast decaying radionuclides far off the valley of stability will become accessible. In order to open certain reaction channels with a high cross section at lower energies, the fast extracted beams have to be slowed down by a degrader, which will induce a certain amount of spallation products and the primary ions themself will undergo energy and spatial straggeling. Thus one needs to know wether one of the desired ions is hitting the target or not. To adress this problem, a detector capable of measuring the time of flight and the trajectory of each ion is to be placed between the degrader and the target. This detector has to introduce as less material as possible in the beam. The solution we are inverstigating uses an emissive foil detector with an active area of 80x100mm 2 and a timing resolution of ≈ 210ps. This prototype has been tested and included in the GSI data acquisition system to tag and track fission products from an open Cf-source. The results and a planned future setup for FAIR will be presented.