TC status Flavio Gatti UNIVERSITY and INFN of

TC status. Flavio Gatti UNIVERSITY and INFN of Genoa, Italy Flavio Gatti, Frascati-PSI, Jan 31 th, 06 Gatti, Frascati-PSI, 1

APD Cooled Support APD F. E. Board Scintillating TC Final Design Fibers (Phi Counter) • A PLASTIC SUPPORT APD STRUCTURE ARRANGES THE SCINTILLATOR BARS AS REQUESTED Item to be constructed. Item prototyped & method of constr tested Item ready. • PM BARS ARE GLUED ONTO THE SUPPORT • INTERFACE ELEMENTS ARE GLUED ONTO THE BARS AND SUPPORT THE ladder Board FIBRES & cabling • FIBRES ARE GLUED AS WELL Main Support • TEMPORARY ALUMINIUM BEAMS ARE USED TO HANDLE THE DETECTOR DURING INSTALLATION • PTFE SLIDERS WILL ENSURE A SMOOTH MOTION ALONG THE RAILS BC 404 -Scintillator slab Scintillator Housing Flavio Gatti, Frascati-PSI, Jan 31 th, 06 Gatti, Frascati-PSI, PM-Scintillator Coupling 2

The construction of the TC is uncoventional (no screw, nonmetals) large use of AOD F. E. card glue, epoxies at the interface of variuos materials APD Water Cooled APD suppport Flavio Gatti, Frascati-PSI, Jan 31 th, 06 Gatti, Frascati-PSI, 3

Scintillator bars of BC 404 have been Flavio Gatti, Frascati-PSI, Jan 31 th, 06 Gatti, Frascati-PSI, produced 4

A sample of BC 404 bar and the plastics housing Flavio Gatti, Frascati-PSI, Jan 31 th, 06 Gatti, Frascati-PSI, 5

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 100 ps 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. Flavio Gatti, Frascati-PSI, Jan 31 th, 06 Gatti, Frascati-PSI, 6

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 H 301 -2. √ Flavio Gatti, Frascati-PSI, Jan 31 th, 06 Gatti, Frascati-PSI, 7

APD F. E. card: § Front-end prototype for APD under test § Final prototypes construction will start soon, by 15 th of february § Final production: 3 weeks after acceptance. § Same schedule for patch panels (concentrator boards) and mezzanine for VME-VPC board. § FPGA CODE (V 1. 01) ready. Soon will start the evaluation process that will take 1 months 8 Ch APD F. E. Card Concentrator Card Flavio Gatti, Frascati-PSI, Jan 31 th, 06 Gatti, Frascati-PSI, 8

Geneal view of the APD electronics and cabling 32 x 8 x 8 x Flavio Gatti, Frascati-PSI, Jan 31 th, 06 Gatti, Frascati-PSI, 9

N 2 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) • Flavio Gatti, Frascati-PSI, Jan 31 th, 06 Gatti, Frascati-PSI, 10

§ Monitor of Partial pressure of He inside the N 2 Bag: § Use of low cost He detectors capable to work at high inlet pressure (already orderer) § Design of the whole system is just started Flavio Gatti, Frascati-PSI, Jan 31 th, 06 Gatti, Frascati-PSI, Blocks of resins to be used in the mockup construction 11

Calibration. Laser Purposes: MONITORING of 1. timing sync. Of TC bars, 2. timing sync TC-LXe, 3. 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 (<5 ps). Power requirements (-> define the cost) 1. Single bar test: 405 nm, 5 m. W, 100 ps laser -> final 10. 000 ph/pulse 2. 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 1064 nm , frequency converter to 532 nm (2 HG) for the TC and 266 nm (4 HG) for the LXe. The INFN is committed in providing funding for the LASER (about 100 KE): the final decision will be taken next week Flavio Gatti, Frascati-PSI, Jan 31 th, 06 Gatti, Frascati-PSI, 12

Status of the schedule § Final Test of TCs @ BTF: § § § Delivery at PSI: -> TC#1 may, 5 th PM: § § prototypes ready for Jan, 15 th. Validation test: 20 days- Final production: March 15 th FPGA SW (first Vers. ) Jan, 15 th, Final version after TC test: May, 15 th. Vers. ) design ready, material ready, ready. th. delivery, april 26 delivery, april Laser: § § Selection by February, 15 th. ladder socket ready final production of Discr. /splitter, 3 months after test with DRS. Discr. /splitter, TC bag: § § § ; TC#2, Jun 24 th. APD electronics: § § -> Jan 27/Feb 3 (components), March 27/April 3, (TC#1), June 1/12 (TC#2) Design ready. 50 fibers, low time jtter (10 um), and fiber-injector already ordered. Delivery: after 3 months from the order (->may, 29 th) He Monitor system (->may, 29 th) Flavio Gatti, Frascati-PSI, Jan 31 th, 06 Gatti, Frascati-PSI, 13