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NeuLAND session at R3B technical meeting April 2010

NeuLAND session at R3B technical meeting April 2010. Overview - Konstanze Boretzky 20 min What is new? Consequences and timelines RPC preliminary results from GSI – from Christoph Caesar NeuLAND in India – from Ushasi Datta Pramanik

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NeuLAND session at R3B technical meeting April 2010

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  1. NeuLAND session at R3B technical meeting April 2010 • Overview - Konstanze Boretzky 20 min • What is new? • Consequences and timelines • RPC preliminary results from GSI – from Christoph Caesar • NeuLAND in India – from Ushasi Datta Pramanik • Scintillator concept – Michael Heil 15(+5) min • RPC data from e- beam – Daniel Bemmerer 15(+5) min • RPC simulations – Zoltan Elekes 15(+5) min • Electric properties of long counters – Diego Gonzalez Diaz 10 min

  2. What is new? • Personnel situation for simulations improved substantially: • GSI: Michael Heil, Diego Gonzalez Diaz (Denis Bertini for R3B root) • FZD: Zoltan Elekes • Univ. Cologne: Vassili Maroussov • Univ. Lisbon – Daniel Galaviz + student • ( Chalmers – Håkan Johansson + students) • Alternative detector concept • Prototype test using neutrons • timelines

  3. NeuLAND plastic? A thickness of 2 m of pure plastic scintillators is sufficient: • Possible dimensions: • 2 x 2 x 2 m • bars of 5 x 5 cm 2 m long • 1600 bars • 3200 PM's

  4. Status as of today • RPC concept: • FZD: small and full size prototypes, tests and simulations • GSI: analysis of neutron data (Uppsala), implementation of TACQUILA, study of electric properties of long counters, gas recycling system • SINP: prototypes, test in June in FZD • Univ. Lisbon: simulations • Scintillator concept: • GSI: simulation, prototypes, readout • Univ. Cologne: simulation • SINP: contribution envisaged

  5. Challenge for 2010 and 2011 • 2010 – Serious investigations for both solutions • Simulation (two independent simulation approaches per detector) • Development of full size detectors – RPC and Scintillator • 2011 – Characterization of RPC and Scintillator protoypes with fast neutrons  Exp. S406, presented tomorrow afternoon Technical Design Report

  6. Timelines R3B and NeuLAND 2010: construction of full-size prototypes RPC and Scintillator 2011: latest Q3: exposure to fast neutrons at Cave C -  TDR 2012: fabrication of 10-20% of NeuLAND counter 2013: installation, commission and first physics experiment at R3B at Cave C using demonstrator ongoing production 2014: ongoing production 2016: moving to R3B Cave, finishing production 2017: first R3B experiment in full setup at new Cave

  7. RPC tests with neutrons at TSL Uppsala combined effort from GSI and FZD team Spokesperson: Daniel Bemmerer

  8. Experimental setup The TSL Neutron Beam Facility • Energy of primary proton beam: • 179MeV • Lithium target thickness: • 23.5 mm • Average energy of peak neutrons: • 174.7 MeV • created by: 7Li(p,n)7Be • neutron flux ±10% • ~ 5000 /(s * cm^2) • beam diameter ~ 10 cm RPC Stand Scintillator Medley Setup Medley Setup Medley Setup Medley Setup Medley Setup Medley Setup Medley Setup Medley Setup Medley Setup Dangtip et al., Nucl. Inst. Meth. A 452, 484 (2000) Dangtip et al., Nucl. Inst. Meth. A 452, 484 (2000) Dangtip et al., Nucl. Inst. Meth. A 452, 484 (2000) Dangtip et al., Nucl. Inst. Meth. A 452, 484 (2000) Dangtip et al., Nucl. Inst. Meth. A 452, 484 (2000) Dangtip et al., Nucl. Inst. Meth. A 452, 484 (2000) Dangtip et al., Nucl. Inst. Meth. A 452, 484 (2000) Dangtip et al., Nucl. Inst. Meth. A 452, 484 (2000)

  9. tested prototypes • GSI-1 • rectangular strip ends • GSI-2 • triangular strip ends • GSI-3 • triangular strip ends and • coupled with transformers • FZD-1 • gaps: 2*3, readout: FOPI&PADI, • misc: common ground • FZD-2 • gaps: 2*3, strip width: 12 mm, • readout: ALICE • FZD-3 • gaps: 2*3, readout: FOPI, misc: transf. 3.3pF, • seperate ground • FZD-4 • gaps: 2*3, interstrip-distance: 1.6mm, • readout: FOPI, misc: cathode ground • FZD-5 • gaps: 4*1, readout: FOPI&PADI, • misc: common ground

  10. Neutron Energy - detected number of neutrons * expected number of neutrons Prokofiev et al., Radiat. Prot. Dosimetry 126, 18 (2007)

  11. Efficiency threshold VALID_TIME ENERGY_CUT POSITION_CUT efficiency ~ (0.74±0.38) % Error (sources): • determine beam spot size on detector (~30%) • difference in efficiency between left & right readout (~10%) • difference in efficiency between strips (~40%) • uncertainty in neutron Flux given by n-monitors (~10%)

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