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BATATA in the Lab. PMT. y. PMT. x. Simulation parameters must be tuned with measurement. Key parameters: 1) Attenuation length by the WLS fiber 2) Light yield in the per energy deposition unit. BATATA planes response. Bicron specifications BCF-92: 1/e Length > 350 cm.  2 MeV.

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  1. BATATA in the Lab.... PMT y . . . PMT . . . x Simulation parameters must be tuned with measurement. Key parameters: 1) Attenuation length by the WLS fiber 2) Light yield in the per energy deposition unit

  2. BATATA planes response Bicron specifications BCF-92: 1/e Length > 350 cm 2 MeV Nphe(x) = Edep Yield(l) Ceff(l) Qeff(l) Att(x) <k> = <Nphe(x)> / <Edep> Att(x) <k>1Fiber = 4-6 phe/MeV <k> 2Fibers = 5-8 phe/MeV Att(0 cm) = 1 Yield(l) Ceff(l) Qeff(l)  k (cte) A measure of Nphe(x0) is necessary to determine <k>

  3. BATATA planes response 1 Fiber at 350 cm from PMT: Median 6.4 phe MPV 4.6 phe 2 Fiber at 350 cm from PMT: Median 8.5 phe MPV 5.3 phe

  4. BATATA planes response 2 Fiber at 150 cm from PMT: Median 11.0 phe MPV 6.5 phe Expected mean number of phe at 350 cm assuming that Nphe(150cm) is the true value: <Nphe(350cm)>expected = Att(350cm) / Att( 150cm) <Nphe(150cm)>measured 7.8 (4.6) ( <Nphe(350cm)>expected - <Nphe(350cm)>measured ) / <Nphe(350cm)>measured  20-30%

  5. 2 Fiber at 150 cm from PMT 2 Fiber at 350 cm from PMT 1 Fiber at 350 cm from PMT

  6. Towards a full understanding of BATATA planes response.... 1 Fiber at 260 cm, 170 cm and 70 cm rom PMT: Median(phe) MPV(phe) 10.3 6.8 6.30 4.00 5.00 3.19 using k = 4.2 phe/MeV Conversion factor 1phe  25-30 QADC

  7. Gracias....

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