17 CBM - Straw Tube Tracker Flex-cable geometry - a large area very thin sheetFrontendFrontend
18 CBM - Straw Tube Tracker Flex-cable HF and controlled impedance design for the HADES MDC-1 anode signal connectorsMDC-1 crosstalk %capacity pFimpedance 122 Ω
19 CBM - Straw Tube Tracker Flex-cable multilayer PCB‘s (Stiff-Flexible-Cable) for the HADES MDC-1 anode signal connectors
20 HV connections to 32 channels CBM - Straw Tube Tracker HV-boardHV connections to 32 channels1 ………………..32design:-the number of HV electrical circuits is equal to the number of segmented wires-a unit consists of 32 HV circuits-a unit is placed on the motherboard-advantages: easy handling (replacement, repair etc.)-problems: high density of components (one circuit per mm) providing of sufficient BV, robustness and minimization of the leakage current
21 CBM - Straw Tube Tracker HV-board Object realizationHV robustness is the main problem!HV componentsHV StripHV SMT components:inexpensive;high density and flex assembling;But it need Hi technology in productionHVencapsulationWe have to propose to use regular single units with flex connections for segments included.Each unit will pass assembly, cleaning, drying and full HV test before installation on the mother board.
22 CBM - Straw Tube Tracker HV-board Unit designMulti-layer PCB ;Opposite side is continuous GND plane;Blind hole technology;The unit (32x74x7 mm3) supplies 32 channels (8 tubes x 4 segments);4 zone of incasulation3 flex circuits go to wires;Non soldered straw connection GND(see Fig.3);Output connector for Front-End electronicUnits will be installed on the mother board1-st zone(flex incapsulation & out)2-nd zone(HV components incapsulation)3-d zone (flex incapsulation & out)4-th zoneOut connector
23 The main prototype elements (area of HV circuits) CBM - Straw Tube Tracker HV-boardThe main prototype elements (area of HV circuits)-All HV units are placed on the motherboard;-Motherboard transfers signals and GNDs from the first segment to the HV units and is a shield for units;-Motherboard is a common element for gas manifold and HV units box;-Cover is a shield for units box too;-Chain HV connections are provided by HV jumpers between units.
24 CBM - Straw Tube Tracker (stt) Software status Geometry and MC point generation readyHit Maker readyReconstruction:- global tracking with Kalman filter soon availablea standalone track finder under develop.Contact person: Alexander Zinchenko
25 CBM - Straw Tube Tracker (stt) Software status Implementation of one stt module
26 CBM - Straw Tube Tracker Summary&Outlook R&D successful finished for: segmented anods segmented straws transmission lines R&D not finished for: high density readout with high potential (3 kV) R&D for HV and gas supply started Implementation of the Straw Tube Tracker in the CBM software started
27 CBM - Straw Tube Tracker Summary&Outlook MC implementation: -input for specified hardware requirements Prototype test: -double-layer (2*48) multifold segmented straw detector is under construction and will be tested in June/July 08 The Straw Tube Tracker with segmented straws fulfill the CBM requirements!
28 CBM - Straw Tube Tracker JINR, Dubna – V. Peshekhonov, V. Lucenko, V. Mialkowski,D. Peshekhonov, A. Savenkov, K. Viryasov, A. ZinchenkoLebedev PI, Moscow – V. TikhomirovPetersburg NPI, Gatchina – D. Seliverstov, E. Chernishova, L. Kudin, A. NadtochiUniv. of Technology, Warsaw – K. Zaremba, J. MarzecFZ Jülich – P. WintzFZ Dresden - Rossendorf, – L. NaumannGSI-INTAS-8729