München 2019 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 52: Instrumentation XI, Accelerators and Applications
HK 52.5: Talk
Thursday, March 21, 2019, 15:15–15:30, HS 11
Characterization of organo-metallic liquids for a novel PET detector — •Simon Peters1, Konstantin Bolwin2, Björn Gerke2, Volker Hannen1, Christian Huhmann1, Klaus Schäfers2, and Christian Weinheimer1 — 1Institut für Kernphysik, WWU Münster — 2European Institute for Molecular Imaging, WWU Münster
Recently, a new type of PET detector has been proposed using a heavy organo-metallic liquid - TriMethyl Bismuth (TMBi) - as target material. TMBi is a transparent liquid with 82% by weight of Bismuth as the heaviest non-radioactive element. 511 keV photons from annihilation processes are effectively converted to photo-electrons in the material due to the high Z bismuth component. These photo-electrons produce both Cherenkov light and charges in the liquid. While the optical component enables a fast timing, a charge readout using a segmented anode can provide an accurate position reconstruction.
The charge measurement requires a high level of purification of the liquid to remove any electro-negative contaminations. In addition, as charge multiplication in the liquid is not an option, the readout of the pulses requires extremely low noise electronics. To be able to compare to existing results from literature, first test measurements were performed using Tetra-Methyl-Si as detection medium.
The talk will present the setup of a test bench for purification and current / pulse detection and thereby characterization of the organo-metallic liquid under study.
This work is supported by DFG via the Cells-in-Motion Cluster of Excellence.