GARFIELD + RCo digital upgrade: A modern set-up for mass and charge identification of heavy-ion reaction products

An upgraded GARFIELD + Ring Counter (RCo) apparatus is presented with improved performances as far as electronics and detectors are concerned. On the one hand fast sampling digital read out has been extended to all detectors, allowing for an important simplification of the signal processing chain together with an enriched extracted information. On the other hand a relevant improvement has been made in the forward part of the set-up (RCo): an increased granularity of the CsI(Tl) crystals and a higher homogeneity in the silicon detector resistivity. The renewed performances of the GARFIELD + RCo array make it suitable for nuclear reaction measurements both with stable and with Radioactive Ion Beams (RIB), like the ones planned for the SPES facility, where the physics of isospin can be studied.

[1]  W. Trzaska,et al.  Particle identification with time-of-flight and pulse-shape discrimination in neutron-transmutation-doped silicon detectors , 2009 .

[2]  J. Ljungvall,et al.  AGATA - Advanced Gamma Tracking Array , 2011 .

[3]  E. Vanzi,et al.  Fiasco: a multidetector optimized for semiperipheral heavy ion collisions at Fermi energies , 2003 .

[4]  R. Ciaranfi,et al.  A DSP equipped digitizer for online analysis of nuclear detector signals , 2007 .

[5]  F. Gramegna,et al.  Towards an understanding of staggering effects in dissipative binary collisions , 2012 .

[6]  A. Pagano.  Studies of Nuclear Reactions and Time Scale with the 4π Detector CHIMERA , 2012 .

[7]  C. Ammerlaan,et al.  Particle identification by pulse shape discrimination in the p-i-n type semiconductor detector , 1963 .

[8]  J. Brzychczyk,et al.  Fragmentation studies with the CHIMERA detector at LNS in Catania: recent progress , 2004 .

[9]  N. Schunck,et al.  Probing nuclear shapes close to the fission limit with the giant dipole resonance in 216 Rn , 2004 .

[10]  D. Santonocito,et al.  Particle identification using the technique and pulse shape discrimination with the silicon detectors of the FAZIA project , 2012 .

[11]  Mass and charge identification of fragments detected with the Chimera Silicon–CsI(Tl) telescopes , 2001, nucl-ex/0112010.

[12]  C. Sfienti,et al.  18Ne diproton decay , 2007 .

[13]  P. Mastinu,et al.  A PROCEDURE TO CALIBRATE A MULTI-MODULAR TELESCOPE , 1995, nucl-ex/9510002.

[14]  P. Milazzo,et al.  Optimizing performances of CsI(Tl) crystals with a photodiode readout , 1999 .

[15]  J. Draayer,et al.  Energy systematics of low-lying collective states within the framework of the interacting vector boson model , 2004, nucl-th/0407076.

[16]  V. V. Parkar,et al.  Identification of light particles by means of pulse shape analysis with silicon detector at low energy , 2012 .

[17]  G. Nebbia,et al.  A new stopping power parameterization for 0.1–15 MeV/nucleon heavy and superheavy ions in solids and gases , 2010 .

[18]  A. Nannini,et al.  The Ring Counter (RCo): A high resolution IC–Si–CsI(Tl) device for heavy ion reaction studies at 10–30 MeV/A , 2006 .

[19]  A. Lleres,et al.  Investigation of the performance of CsI(Tl) for charged particle identification by pulse-shape analysis , 1989 .

[20]  A. Nannini,et al.  Excitation of the dynamical dipole in the charge asymmetric reaction 16O + 116Sn , 2009 .

[21]  J. Nyberg,et al.  Angular distribution of photons from the delay of the GDR in hot and rotating light Yb nuclei from exclusive experiments , 1994 .

[22]  Giacomo Poggi,et al.  Digital-sampling systems in high-resolution and wide dynamic-range energy measurements: Finite time window, baseline effects, and experimental tests , 2006 .

[23]  A. Nannini,et al.  GARFIELD: a General ARray for Fragment Identification and for Emitted Light particles in Dissipative collisions , 2004, IEEE Symposium Conference Record Nuclear Science 2004..

[24]  A. Nannini,et al.  Measurement of isospin mixing at a finite temperature in80Zr via giant dipole resonance decay , 2011 .

[25]  Brian E. Nett,et al.  The high resolution array (HiRA) for rare isotope beam experiments , 2007 .

[26]  Giacomo Poggi,et al.  Digital-sampling systems in high-resolution and wide dynamic-range energy measurements: Comparison with peak sensing ADCs , 2006 .

[27]  T. Clerc,et al.  INDRA, a 4π charged product detection array at GANIL , 1995 .

[28]  S. Yennello,et al.  NIMROD―ISiS, a versatile tool for studying the isotopic degree of freedom in heavy ion collisions , 2009 .

[29]  P. Cochat,et al.  Et al , 2008, Archives de pediatrie : organe officiel de la Societe francaise de pediatrie.

[30]  A. Nannini,et al.  Giant dipole resonance in the hot and thermalized 132Ce nucleus: damping of collective modes at finite temperature. , 2006, Physical review letters.

[31]  L. Vannucci,et al.  A telescope with microstrip gas chambers for the detection of charged products in heavy-ion reactions , 1997 .

[32]  C. Boiano,et al.  Hybrid low-noise charge preamplifiers for heavy-ion detectors , 1991 .

[33]  α-clustering effects in dissipative 12 C+ 12 C reactions at 95 MeV , 2013, 1301.5990.

[34]  L. Travaglini,et al.  Performances of keystone geometry micro-strip gas chambers , 2002 .

[35]  A. Maggio,et al.  Stopping power of helium gas for ^9Be ions from 2 to 31 MeV , 2007 .

[36]  V. Simion,et al.  Particle identification method in the CsI(Tl) scintillator used for the CHIMERA 4π detector , 2002 .

[37]  G. W. Mcbeth,et al.  Pulse shape discrimination in inorganic and organic scintillators. I , 1971 .

[38]  G. Pasquali,et al.  A method for non-destructive resistivity mapping in silicon detectors , 2009 .

[39]  G. Pausch,et al.  Particle identification in solid-state detectors by exploiting pulse shape information , 1992 .

[40]  F. Gramegna,et al.  Automatic procedure for mass and charge identification of light isotopes detected in CsI(Tl) of the GARFIELD apparatus , 2010 .

[41]  Andrea Rapisarda,et al.  Chimera: a project of a 4π detector for heavy ion reactions studies at intermediate energy , 1995 .

[42]  A. Boiano,et al.  FAIR: a new fast trigger and readout bus system , 1998 .

[43]  Giacomo Poggi,et al.  Time measurements by means of digital sampling techniques: a study case of 100 ps FWHM time resolution with a 100 MSample/s, 12 bit digitizer , 2004 .

[44]  M. B. Tsang,et al.  Energy resolution and energy–light response of CsI(Tl) scintillators for charged particle detection , 2001 .

[45]  F. Gramegna,et al.  Reaction mechanisms and staggering in S + Ni collisions , 2011 .

[46]  J. Gautier,et al.  Progresses in the pulse shape identification with silicon detectors within the FAZIA Collaboration , 2011 .

[47]  D. Santonocito,et al.  Comparison of charged particle identification using pulse shape discrimination and ΔE−E methods between front and rear side injection in silicon detectors , 2013 .