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TC status. Flavio Gatti UNIVERSITY and INFN of Genoa, Italy

TC status. Flavio Gatti UNIVERSITY and INFN of Genoa, Italy. APD Cooled Support. APD F.E. Board. Scintillating Fibers (Phi Counter). TC Final Design. Item to be constructed. Item prototyped & method of constr tested Item ready. • A PLASTIC SUPPORT STRUCTURE ARRANGES THE

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TC status. Flavio Gatti UNIVERSITY and INFN of Genoa, Italy

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  1. TC status.Flavio Gatti UNIVERSITY and INFNof Genoa, Italy

  2. APD Cooled Support APD F.E. Board Scintillating Fibers (Phi Counter) TC Final Design Item to be constructed. Item prototyped & method of constr tested Item ready. • A PLASTIC SUPPORT STRUCTURE ARRANGES THE SCINTILLATOR BARS AS REQUESTED • THE BARS ARE GLUED ONTO THE SUPPORT • INTERFACE ELEMENTS ARE GLUED ONTO THE BARS AND SUPPORT THE FIBRES • FIBRES ARE GLUED AS WELL • TEMPORARY ALUMINIUM BEAMS ARE USED TO HANDLE THE DETECTOR DURING INSTALLATION • PTFE SLIDERS WILL ENSURE A SMOOTH MOTION ALONG THE RAILS APD PM ladder Board & cabling Main Support BC404-Scintillator slab Scintillator Housing PM-Scintillator Coupling

  3. The construction of the TC is uncoventional (no screw, nonmetals) large use of glue, epoxies at the interface of variuos materials APD AOD F.E. card Water Cooled APD suppport

  4. Scintillator bars of BC404 have been produced

  5. A sample of BC404 bar and the plastics housing

  6. PM & Discriminator Card • PM delivered with useful measured parameters • Selection on gain and Q.E. is needed: highest gain-> inner side of COBRA, match the Q.E. for both PMs of the bar in order to meet the 100ps FWHM requirement over the full length. • Discriminator cards design need for a test with DRS, but we are providing for a test with Digital Oscilloscope in the present run in frascati. Must be finalized soon: delivery 3 months later.

  7. Production scheme of Scintilating Fibers tested: • Hot forming with and without jacket. √ • Test for light losses, i.e., trapping efficiency. √ • Test of several diffusing or reflecting jacket. √ • Coupling to the APD via EPOTEK H301-2. √

  8. APD F.E. card: • Front-end prototype for APD under test • Final prototypes construction will start soon, by 15th of february • Final production: 3 weeks after acceptance. • Same schedule for patch panels (concentrator boards) and mezzanine for VME-VPC board. • FPGA CODE (V1.01) ready. Soon will start the evaluation process that will take 1 months 8 Ch APD F.E. Card Concentrator Card

  9. Geneal view of the APD electronics and cabling 32x 32x 8x 8x

  10. N2 bag • N2 bag will be built in house, after negative results of production tests performed in several companies • We obtained a special production of 0.25 mm tick EVAL T foil (the best on the shelf) in a sandwich of two PE foils • Construction of mockup with machined resins • The foils will be formed on the mockup and assembled by thermo-welding or epoxy: these joints are successfully tested • Construction will start after the completion of the first TC (middle of march)

  11. Blocks of resins to be used in the mockup construction • Monitor of Partial pressure of He inside the N2 Bag: • Use of low cost He detectors capable to work at high inlet pressure (already orderer) • Design of the whole system is just started

  12. CalibrationLaser Purposes: MONITORING of • timing sync. Of TC bars, • timing sync TC-LXe, • timing resolution of TC Requirements: • 10 picosecond pulse laser at 532 nm (TC) and 266 nm (LXe) • Repetition rate adjustable in the 100-1000 Hz range. • Sync out with low jitter (<5ps). Power requirements (-> define the cost) • Single bar test: 405nm, 5mW, 100ps laser -> final 10.000 ph/pulse • Loss at fiber injection: 10^-4, bar acceptance: 0.01, Q.E., averall optical transmission: 0.1 (total about 10^-7) -> 1 W laser. Results of the investigations: Nd:YVO 1064nm , frequency converter to 532nm (2HG) for the TC and 266nm (4HG) for the LXe. The INFN is committed in providing funding for the LASER (about 100KE): the final decision will be taken next week

  13. Status of the schedule • Final Test of TCs @ BTF: • -> Jan 27/Feb 3 (components), March 27/April 3, (TC#1), June 1/12 (TC#2) • Delivery at PSI: -> TC#1 may, 5th ; TC#2, Jun 24th. • PM: • Selection by February, 15th. • ladder socket ready • final production of Discr./splitter, 3 months after test with DRS. • APD electronics: • prototypes ready for Jan,15th. • Validation test:20 days- Final production: March 15th • FPGA SW (first Vers.) Jan,15th,Final version after TC test: May, 15th. • TC bag: • design ready, material ready. • delivery,april 26th. • Laser: • Design ready. • 50 fibers, low time jtter (10 um), and fiber-injector already ordered. • Delivery: after 3 months from the order (->may, 29th) • He Monitor system (->may, 29th)

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