1. 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
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

2. 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

3. 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

4. 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

5. 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

6. 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

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

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

9. 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

10. 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

11. 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

12. 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

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

14. 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