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HK: Fachverband Physik der Hadronen und Kerne

HK 35: Instrumentation

HK 35.7: Vortrag

Dienstag, 5. März 2013, 15:45–16:00, WIL-A221

Study of low-mass readout cables for the CBM Silicon Tracking System — •Minni Singla — Goethe University, Frankfurt — GSI, Darmstadt

The study of thin multi-line readout cables will be reported. The application is the Silicon Tracking System (STS) of the fixed-target heavy-ion experiment Compressed Baryonic Matter (CBM), under design at the forthcoming accelerator centre FAIR in Germany. These cables will bridge the distance between the microstrip sensors and the signal processing electronics placed at the periphery of the silicon tracking stations. Finite element simulations (using the TCAD package RAPHAEL) have been used to optimize the cables towards minimum possible Equivalent Noise Charge (ENC). Various trace geometries and trace materials have been explored. SPICE modelling has been implemented in Sentaurus Device to study the transmission loss in the cables. The simulations have been validated with measurements. Charge loss in cables of different lengths was determined by injecting charge pulses of known amplitude. An optimized cable design is reported yielding minimum ENC, material budget and transmission loss. Supported by HIC for FAIR, HGS-HIRe and H-QM.