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CHANTI status

CHANTI status. F.A., C. Annunziatella*, T. Capussela , D. Di Filippo, P. Massarotti, M. Mirra**, M. Napolitano, L. Roscilli , G. Saracino Università degli Studi «Federico II» e Sezione INFN -Napoli. * B.Sc . Thesis work **Master Thesis work. Detailed G4 simulation.

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CHANTI status

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  1. CHANTI status F.A., C. Annunziatella*, T. Capussela, D. Di Filippo, P. Massarotti, M. Mirra**, M. Napolitano, L. Roscilli, G. Saracino Università degli Studi «Federico II» e Sezione INFN -Napoli *B.Sc. Thesis work **Master Thesis work

  2. Detailed G4 simulation • A detailedsimulation of the bar hasbeenwritten in G4,taking into account allopticalprocesses, includingabsorption and reemission inside the BCF-92 fiber

  3. Optical interfaces • There are variousopticalinterfaces to describe: TiO2 coating-Sci, Sci-Glue; Glue-Clad, Clad-Core, Fiber end (mirrored). All of themincludedinto the simulation. 10000 opticalphotons

  4. Optical interfaces (2) • Core-Cladding Reflection Refraction

  5. Optical interfaces (3) • Lambert diffusion on scintillator-coatinginterface

  6. Muons • Muonssimulatedaccording to the angulardistributionobtained in the cosmicraytelescopeused to characterize the bars. Reasonableagreement with observeddistribution of Npe MC ≈40% PDEDATA

  7. MC: nextsteps • Use the full simulation to obtain a time correction for xy position on techrun data • Parametrize the opticalresponse (aswealreadydid for the LAV blocks) and put thisdetaileddescription in official MC • Complete the digitization <v>=19,6 cm/ns

  8. Construction/test status (1) • Long stop (from Decembertillnow…) in bar tests due to a serious fault in climaticchamber (nowsolved, restarting) • Half of the bar tested . Expect 6 monthstime to complete tests on allbars. R Npe

  9. Construction/test status 2 • Design of the main vessel (CHANTI1-5) completed • 3D mockup of the insertionregiongiven to GTK group so thatthey can cope to our design whencompleting the mechanical design of the GTK • Construction in progress (80% complete) in Napoli workshop w material (AISI 304L steelplates) bought by UCLouvain

  10. Conclusions • Detailed MC prepared, nextstepiscomparison with techrun data • Very big work from mechanical workshop and mechanical designer in Napoli to build the CHANTI-GTK3 vessel->almost ready • Quality test on barsrestartedafter a long stop

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