We started last December: 32 channels prototype “Julich like” to: Ferrara We started last December: 32 channels prototype “Julich like” to: Study assembly procedure Check for possible “automatic” operations of the final forward tracking detectors Test of single and multiple straws with Carioca 10 75 cm long straws 150-170 cm long straws Following our few months experience on both the mechanical and electrical aspects we are convinced that: We have a backup “safe solution” for the F.T.D. We should try to optimize Jülich – 7-11 september 2009

Jülich – 7-11 september 2009 Federico Evangelisti Un alternative proposal for STRAW CHAMBER MODULE Ferrara We have studied and build a mokup preliminary prototype of a straw module for the tracking stations. Module: 2x16 straws Jülich – 7-11 september 2009 Federico Evangelisti

Jülich – 7-11 september 2009 Federico Evangelisti Ferrara The GOAL of the new design is to avoid the critical components: springs, crimping HV pins and end plugs. Simultaneously simplify the construction by automatic machine. The straw module consists of two "heads”. Main head Secondary head Jülich – 7-11 september 2009 Federico Evangelisti

Jülich – 7-11 september 2009 Federico Evangelisti Ferrara printed board for straws positioning and grounding MAIN HEAD straws wire printing boards for positioning/fixing wires and RC elements cover (made of conductive material or metalized PVC) glue HV connector welding signal connectors gas IN connector Jülich – 7-11 september 2009 Federico Evangelisti

Jülich – 7-11 september 2009 Federico Evangelisti Ferrara SECONDARY HEAD printed boards for positioning/fixing wires glue straws welding wire printed board for straws positioning and grounding cover (made of conductive material or metalized PVC) Gas OUT connector Jülich – 7-11 september 2009 Federico Evangelisti

Jülich – 7-11 september 2009 Federico Evangelisti Ferrara MAIN HEAD printED board for straws positioning and grounding straws cover O-ring straws bushings/end plugs (made of conductive material or metalized PVC) wires and RC circuit printing boards The opposite head is of the same kind without: RC circuit on the printing board for fixing wires, HV connector and signal connectors. Jülich – 7-11 september 2009 Federico Evangelisti

WALL ASSEMBLY SIMULATION ( Kracow proposal ) Ferrara WALL ASSEMBLY SIMULATION ( Kracow proposal ) (from J.Smyrski presentation GSI 8.12.08) Jülich – 7-11 september 2009 Federico Evangelisti

FIRST MOCK-UP MADE IN FERRARA Jülich – 7-11 september 2009 Federico Evangelisti

Jülich – 7-11 september 2009 Federico Evangelisti Ferrara FIRST MOCK-UP MADE IN FERRARA to test the system: general mechanics and gas tightness printing board for positioning and grounding straws gas OUT straws alluminium cover gas IN Jülich – 7-11 september 2009 Federico Evangelisti

FIRST MOCK-UP MADE IN FERRARA printing board for positioning and grounding straws straws printing boards for positioning/fixing wires and RC elements gas OUT alluminium cover gas IN Jülich – 7-11 september 2009 Federico Evangelisti

FIRST MOCK-UP MADE IN FERRARA – HEAD COMPONENTS alluminium cover O-ring Printed boards for positioning/fixing wires and RC elements straw bushings printed board for positioning and grounding straws Jülich – 7-11 september 2009 Federico Evangelisti

Jülich – 7-11 september 2009 Federico Evangelisti Ferrara UNDER INVESTIGATION ASSEMBLY PROCEDURES; AUTOMATION PROCEDURE FOR THE PRODUCTION OF THE MODULES WIRE STRETCHING/OVERPRESSURE WHAT WE CAN DO NEXT GAS TIGHTNESS; SIGNAL CONNECTORS MAKE THE” JULICH LIKE”32 CH PROTTYPE WORKING Jülich – 7-11 september 2009 Federico Evangelisti

Jülich – 7-11 september 2009 Federico Evangelisti Ferrara CONCLUSIONS Jülich – 7-11 september 2009 Federico Evangelisti

Jülich – 7-11 september 2009 Federico Evangelisti Ferrara BACKUP SLIDES Module: 2x16 straws 166,5 mm depends on the kind of chamber 35 mm 65 mm Jülich – 7-11 september 2009 Federico Evangelisti