flavio gatti,csn1, feb 6 th, 06 1 tc status. flavio gatti university and infn of genoa, italy

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  • Slide 1
  • Flavio Gatti,CSN1, Feb 6 th, 06 1 TC status. Flavio Gatti UNIVERSITY and INFN of Genoa, Italy
  • Slide 2
  • Flavio Gatti,CSN1, Feb 6 th, 06 2 TC Final Design 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 PM-Scintillator Coupling Scintillator Housing BC404-Scintillator slab Main Support Ladder Board & cabling PM APD APD F.E. Board Scintillating Fibers (Phi Counter) APD Cooled Support Item to be constructed. Item prototyped & constr. Meth. under test Item ready.
  • Slide 3
  • Flavio Gatti,CSN1, Feb 6 th, 06 3 The construction of the TC is unconventional (no screw, no metals,) large use of glues, epoxies at the interface of various plastics materials. Tolerances of about 1mm over 1m must be achieved. APD APD F.E. card Water Cooled APD support
  • Slide 4
  • Flavio Gatti,CSN1, Feb 6 th, 06 4 A sample of BC404 bar and the plastics housing Tested @ BTF (3 feb), 93ps FWHM -preliminary-
  • Slide 5
  • Flavio Gatti,CSN1, Feb 6 th, 06 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 100ps FWHM requirement over the full length. Discriminator cards design need for a test with DRS, but we are preparing for a test with Digital Oscilloscope in the present run (27jan/4feb) at BTF. Data under analysis. delivery 3 months later.
  • Slide 6
  • Flavio Gatti,CSN1, Feb 6 th, 06 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 H301-2.
  • Slide 7
  • Flavio Gatti,CSN1, Feb 6 th, 06 7 APD F.E. card: Front-end prototype for APD under test Final prototypes construction will start soon, by feb.15th 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 on the VME Board that will take 1 months 8 Ch APD F.E. Card Concentrator Card
  • Slide 8
  • Flavio Gatti,CSN1, Feb 6 th, 06 8 32x 8x Geneal view of the APD electronics and cabling
  • Slide 9
  • Flavio Gatti,CSN1, Feb 6 th, 06 9 N2 bag N2 bag N2 bag will be built in house, after negative results of production tests performed in several companies 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 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 resinsConstruction of mockup with machined resins The foils will be formed on the mockup and assembled by thermo-welding or epoxy: these joints are successfully testedThe 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)Construction will start after the completion of the first TC (middle of march)
  • Slide 10
  • Flavio Gatti,CSN1, Feb 6 th, 06 10 Monitor of Partial pressure of He inside the N2 Bag: Use of low cost He detectors capable to work at high inlet pressure (already ordered) Design of the whole system is just started Blocks of resins to be used in the mockup construction
  • Slide 11
  • Flavio Gatti,CSN1, Feb 6 th, 06 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 ( define the cost) 1.Single bar test: 405nm, 5mW, 100ps laser -> final 10.000 ph/pulse 2.Loss at fiber injection: 10^-4, bar acceptance: 0.01, Q.E., overall 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, 1W average power, ext trig 1/min, intern trig 100- 1000Hz, at least 1 uJ/pulse, sync out.
  • Slide 12
  • Flavio Gatti,CSN1, Feb 6 th, 06 12 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, 5 th ; TC#2, Jun 24 th. PM: Selection by February, 15 th. ladder socket ready final production of Discr./splitter, 3 months after test with DRS. APD electronics: 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. TC bag: design ready, material ready. delivery,april 26 th. 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)
  • Slide 13
  • Flavio Gatti,CSN1, Feb 6 th, 06 13 Genova, 18 gennaio 2006 Genova, 18 gennaio 2006 Ai referee dellEsperimento MEG: Oggetto: richiesta di sblocco di SJ per acquisto del laser di sincronizzazione degli elementi del TC e tra i TC e rivelatore a LXe. Cari Referee, come avevamo discusso nellanno passato e necessario acquisire un laser pulsato e sufficientemente potente per : la sincronizzazione relativa delle barre di scintillatore e monitoraggio la misura e monitoraggio della risoluzione temporale di ogni barra la sincronizzazione relativa tra Timning Counter e LXe e monitoraggio Le caratteristiche richieste sono state ulteriormente approfondite e definite: 1.la potenza deve essere sufficientemente alta per inviare un numero di fotoni adeguato ( 104 fotoni per PM) attraverso le fibre ottiche, compensando le perdite di accoppiamento laser-fibre-barra-pm; 2.la larghezza dellimpulso deve essere piccola rispetto alla risoluzione temporale del sistema, in modo da non mascherare dipendente i possibili effetti di degradamento prodotti dal rivelatore; 3.operare alla lunghezza donda del visibile ( 532nm) per il TC e a lunghezze donda dell UV (266nm) nel LXe.
  • Slide 14
  • Flavio Gatti,CSN1, Feb 6 th, 06 14 Lanalisi degli accoppiamenti ottici e la seguente: la stima sulla efficienza di trasmissione del fascio allingresso della fibra (SMF28e : dispersione di 18 ps/nm Km e apertura numerica di 0.14), che ha un diametro del core di 10 um e diametro esterno di 250 um, e circa 1x10-4 (includendo le perdite pieno-vuoto dellimpacchettamento del bundle, le perdite di matching tra i diametri del fascio e del bundle e le perdite di accettanza per allineamento) ; usando un diffusore e un ingresso perpendicolare alla barra, lefficienza di intrappolamento nella barra e 1x10-2 circa; la perdita complessiva di trasmissione in tutte le interfacce ottiche e le perdite per divergenza del fascio producono un fattore di raccolta finale pari a 0.1 circa; Considerando che e necessario illuminare circa 50 fibre, e necessario disporre di 50 nJ/impulso. Sul mercato e disponibile una classe di laser con potenza media intorno a 1 W e una energia per impulso dellordine di 1-100 uJ, secondo il rep. rate a cui operano
  • Slide 15
  • Flavio Gatti,CSN1, Feb 6 th, 06 15 Ho riformulato le richieste e sono arrivate le seguenti risposte, di seguito allegate, che si sintetizzano cosi: Universit di PV: laser 1 W, 5-10ps, rep. Rate < 1KHz, 100uJ @532nm, 25uJ@266nm, costo (IVA inclusa) 88.000,oo Euro. HighQlaser: laser piconova, 1W, 8ps, rep. rate 500KHz, 400 uJ@532nm, 100uJ@266, costo (IVA inclusa) 135.300,oo Euro. Lumera: Rapid laser 2W, 12 ps, rep.rate