The ACTAR project at SPES Status and perspectives
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1 The ACTAR project at SPES Status and perspectives Riccardo Raabe Instituut voor Kern- en Stralingsfysica, KU Leuven SECOND SPES INTERNATIONAL WORKSHOP
2 The active target concept Time-Projection Chamber (TPC) gas volume Electrons produced by ionization drift to an amplification zone Incoming beam range electric field Signals collected on a segmented pad plane 2d-image of the track 3 rd dimension from the drift time of the electrons amplification zone segmented plane + the detection gas is the target
3 The active target concept Time-Projection Chamber (TPC) gas volume Electrons produced by ionization drift to an amplification zone Incoming beam range electric field Signals collected on a segmented pad plane 2d-image of the track 3 rd dimension from the drift time of the electrons amplification zone segmented plane + the detection gas is the target
4 Characteristics and advantages Large target thickness possible without losing resolution Efficiency Low detection threshold Particle identification Versatile Portable Different target/detection gases Adjust pressure Optimize amplification voltage Trigger choice
5 Characteristics and advantages Large target thickness possible without losing resolution Efficiency Low detection threshold Particle identification Versatile Portable Different target/detection gases Adjust pressure Optimize amplification voltage Trigger choice
6 Broad scope: reactions, decays One and two nucleon transfer reactions Resonant scattering Inelastic scattering and giant resonances Nuclear structure and nuclear astrophysics Exotic nuclear decay (2p, β3p, βαp, ) Transfer-induced fission Excitation functions
7 Results with Maya Demonchy et al., NIMA 573 (2007) 145 Reactions with light nuclei 12 C( 8 He, 13 N) 7 H at GANIL M. Caamaño et al., PRL 99 (2007) Li(p,t) at TRIUMF I. Tanihata et al., PRL 100 (2008) T. Roger et al., PRC 79 (2009) He(p,n) at GANIL T. Roger, L. Gaudefroy, W. Mittig, H. Wang, et al.
8 Results with Maya Demonchy et al., NIMA 573 (2007) 145 Reactions with light nuclei 12 C( 8 He, 13 N) 7 H at GANIL M. Caamaño et al., PRL 99 (2007) Li(p,t) at TRIUMF I. Tanihata et al., PRL 100 (2008) T. Roger et al., PRC 79 (2009) He(p,n) at GANIL T. Roger, L. Gaudefroy, W. Mittig, H. Wang, et al.
9 Results with Maya Demonchy et al., NIMA 573 (2007) 145 Investigations of collective modes: isoscalar resonances 56 Ni(d,d ) at GANIL C. Monrozeau et al., PRL 100 (2008) Ni(d,d ) and (α,α ) at GANIL M. Vandebrouck, in preparation
10 Results with Maya Demonchy et al., NIMA 573 (2007) 145 Investigations of collective modes: isoscalar resonances 56 Ni(d,d ) at GANIL C. Monrozeau et al., PRL 100 (2008) Ni(d,d ) and (α,α ) at GANIL M. Vandebrouck, in preparation
11 Collective modes: inelastic scattering Inelastic scattering: low-energy recoils at small angles multipole decomposition
12 Collective modes: inelastic scattering Inelastic scattering: low-energy recoils at small angles multipole decomposition
13 The new device: ACTAR TPC Design goals Dynamic range to 10 3 Multiple tracks Spatial resolution <2mm Energy resolution 2% Beam intensities up to 10 7 Counting rate 10 3 events/s Work upon Detector hardware Electronics Data acquisition software
14 The new device: ACTAR TPC Design goals Dynamic range to 10 3 Multiple tracks Spatial resolution <2mm Energy resolution 2% Beam intensities up to 10 7 Counting rate 10 3 events/s Work upon Detector hardware Electronics Data acquisition software
15 Design ACTAR TPC CDR available on SPIRAL2 website Cubic geometry (mainly) Amplification: Micromegas Ancillary detectors Independent pads, 2x2 mm 2 More than 16k channels E
16 Design ACTAR TPC CDR available on SPIRAL2 website Cubic geometry (mainly) Amplification: Micromegas Ancillary detectors Independent pads, 2x2 mm 2 More than 16k channels E
17 General Electronics for TPCs GET High front-end density High-rate throughput (selective readout, zero suppression) High S/N ratio High dynamic range Manage time stamp, other detectors, control... Intelligent trigger L0 external L1 multiplicity L2 topology
18 Status Collaboration Begin 2012: ACTAR TPC Collaboration Agreement (G. Grinyer spokesperson) GANIL, CEA Saclay, CENBG, IPN Orsay, KU Leuven, Univ. Santiago de Compostela R&D timeline : Demonstrator New partnership form in 2015 Financial 2009: ANR project GET electronics 550 k (total project 4.3 M ) Feb 2014: ERC StG (G. Grinyer) 1.29 M detector ready begin 2016 June 2014: ERC CoG (R. Raabe) 1.94 M 2014: SIR proposal (T. Marchi) 1 M
19 24 cm ACTAR TPC demonstrator(s) (IPN Orsay, CENBG Bordeaux) Define the final detector design Building and testing a complete GET system (2048 channels) 30 cm
20 Status Collaboration Begin 2012: ACTAR TPC Collaboration Agreement (G. Grinyer spokesperson) GANIL, CEA Saclay, CENBG, IPN Orsay, KU Leuven, Univ. Santiago de Compostela R&D timeline : Demonstrator New partnership form in 2015 Financial 2009: ANR project GET electronics 550 k (total project 4.3 M ) Feb 2014: ERC StG (G. Grinyer) 1.29 M detector ready begin 2016 June 2014: ERC CoG (R. Raabe) 1.94 M 2014: SIR proposal (T. Marchi) 1 M
21 Status Array of -ray scintillators LaBr 3 or CeBr 3 magnetic field amplification zone incoming beam segmented plane K.L. Jones et al., Nature 465 (2010) kev resolution gas volume electric field Design Assembly Detector ready begin 2017
22 Status Array of -ray scintillators LaBr 3 or CeBr 3 magnetic field amplification zone incoming beam segmented plane K.L. Jones et al., Nature 465 (2010) kev resolution gas volume electric field Design Assembly Detector ready begin 2017
23 Status Array of -ray scintillators LaBr 3 or CeBr 3 magnetic field amplification zone incoming beam gas volume electric field segmented plane E (gamma) K.L. Jones et al., Nature 465 (2010) 454 Design Assembly Detector ready begin 2017
24 Status Collaboration Begin 2012: ACTAR TPC Collaboration Agreement (G. Grinyer spokesperson) GANIL, CEA Saclay, CENBG, IPN Orsay, KU Leuven, Univ. Santiago de Compostela R&D timeline : Demonstrator New partnership form in 2015 Financial 2009: ANR project GET electronics 550 k (total project 4.3 M ) Feb 2014: ERC StG (G. Grinyer) 1.29 M detector ready begin 2016 June 2014: ERC CoG (R. Raabe) 1.94 M 2014: SIR proposal (T. Marchi) 1 M
25 Active Target at SPES: ATS SIR proposal (T. Marchi) Dedicated detector (cage, Micromegas, chamber) Tests on dynamic range Development of custom electronics (GPU-based) Other in-kind contributions possible (tests, commissioning) Physics cases: Transfer reactions (2 LoIs) Resonant reactions (1 LoI) Pigmy resonances?
26 Active Target at SPES: ATS SIR proposal (T. Marchi) Dedicated detector (cage, Micromegas, chamber) Tests on dynamic range Development of custom electronics (GPU-based) Other in-kind contributions possible (tests, commissioning) Physics cases: Transfer reactions (2 LoIs) Resonant reactions (1 LoI) Pigmy resonances?
27 Active Target at SPES: ATS Location
28 Active Target at SPES: ATS Footprint
29 Summary ACTAR TPC at SPES Transfer reactions with most exotic and weak beams Particle-gamma coincidence possible Resonant reactions Inelastic scattering INFN Legnaro, INFN and Univ. Padova, INFN and Univ. Florence, INFN and Univ. Bologna, INFN LNS and Univ. Catania, INFN and Univ. Napoli, INFN and Univ. Milano (Italy), Univ. Nevsehir (Turkey), KU Leuven (Belgium), GANIL Caen, CEA Saclay, IPN Orsay (France), Univ. Lisboa (Portugal), Univ. Santiago de Compostela (Spain), Ruder Boskovic Institute (Croatia)
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