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Milestone Achieved: Implementation of the Anti-Neutrinos Detector for the Angra Neutrinos Project

This abstract discusses the important milestone achieved in the implementation of the anti-neutrinos detector for the Angra Neutrinos Project. The detector concept, design, and electronics used in the project are described, along with the goals and impact of the implementation. Characterization results of various components are also presented.

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Milestone Achieved: Implementation of the Anti-Neutrinos Detector for the Angra Neutrinos Project

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  1. Centro Brasileiro de Pesquisas Físicas (CBPF) Presented by A. F. Barbosa, in the V AAP Workshop, March 2009

  2. Abstract • important milestone for the Angra Neutrinos Project; • first “visible” sign of the anti-neutrinos detector implementation; • impact on the detector concept: very close to the reactor core + at sea level; • goals: measuring background, testing hardware + data acquisition + connection etc.

  3. Detector concept Relativistic charged particle crossing a dielectric medium  radiation emission In water: max = 41o min = 0.75

  4. Detector concept Taking: 2-1 = , 1  = 1nm,  covering the visible light spectrum

  5. Detector design 1 – Water 2 – Tank 3 – Tyvek ‘bag’ 4 – ‘bag’ holder 5 – Tyvek top cover 6 – Black rubber sealing 7 – Tank hat 8 – Pmt + base 9 – High voltage 10 – Signal output 1.28m height, 0.8m diameter   640 liters

  6. Electronics (analog modules) Pre-amplifier & shaping (*) AngraNote 001-2007 Discriminator + reate meter Temperature sensor The three circuits have been assembled in one single NIM module

  7. Electronics (digital module) • 4 ADC channels • 8 TDC channels (not used here) • Programmed hardware USB

  8. Data Acquisition Data block for an event • Waveforms sampled @ 60MHz sampling rate (16.6ns time bin) • 128 samples per event (32 before trigger, 96 after trigger) • Code compiled under Linux in ROOT

  9. Characterization results (pre-amplifier) Line: SPICE simulation Dots: measurements in scope

  10. Characterization results (rate meter) (*) The expected counting muon count rate is below 3KHz

  11. Characterization results (temperature sensor) The error bars in the Y-axis are multiplied by 10. Only a rough precision room temperature monitoring is required

  12. Characterization results (Data Processing Module) Error bars multiplied by 10.

  13. Acknowledgement • The Angra Neutrino project is currently financed by grants from: CNPq, FINEP, MCT, FAPERJ, CAPES • Unvaluable support from ELETRONUCLEAR (especially A. C. Mazzaro, I. Soares, L. Domingues de Souza, A. M. Santos Filho) • Help from undergraduate students: T. Blanche, L. Amaral

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