TRACE: silicon-detector array for direct and binary ...colo/SPES/Mengoni.pdf · TRACE: silicon-detector array for direct and binary reaction at SPES Daniele Mengoni for the GHT collaboration

TRACE: silicon-detector array for direct and binary

reaction at SPES

Daniele Mengoni

for the GHT collaboration

Università and INFN - Padova

SPES meeting, Milano

09-10 Dicembre 2013

Daniele Mengoni (Univ. di Padova) TRACE 09÷10 Dic. 2013 1 / 28

Outline

1 Introduction

2 Development

3 Physics with AGATA (and stable beams) at LNL

Extension to the RIB case


Transfer and binary reactions with RIBhigh angular resolution and coverage

TRACE(GASPARD,HYDE)...FARCOS

r process

changesshell

Skin

Haloes

Channel coupling

pn pairing

p process

Clusters

pygmys

evolution

pairing

p transfer

d transfer

cluster

2n transfer

1,2 nucleontransfer

n transfer

transfer


Ambit of the new silicon-based array

emerging RIB facilities

Energy regime

few MeV → tens of MeV/u

Discrimination

PSA, E∆E, ...PSA

Special targets

cryogenic:H2, He2, film (Chymene), etc.

Flexibility

coupling with others detectors


LCP Complementary/Stand-alone detectors

Silicon based array

Solenoid Active target


Si-based arrayspanorama


The future context at LNL

SPES

GALILEO

TRACE


Letters of Intent2010 SPES workshop

Spectroscopy studies around 78Ni and beyond N = 50 via transfer and Coulomb

excitation reactions.

J.J. Valiente-Dobon, A. Gadea, R. Orlandi, E. Clement

Nuclear magicity at Z 50 N 82. Neutron capture cross section via the surrogate

method.

D.Mengoni, G.deAngelis

Investigation of critical point symmetries in neutron rich nuclei.

D. Tonev

Structure of Sb nuclei around 132Sn as a testing ground for realistic shell model

interactions.

B.Fornal, S.Lunardi, G.deFrance

Search for Exotic-Octupole deformation effects in n-rich Ce-Xe-Ba Nuclei.

E.Sahin

Coulomb Excitation measurements of Radioactive Ions: N≥82 and Z≥50

B.Melon


TRACEHighly-segmented silicon-pad detector for particles and light ions detection.

Two-layer silicon-telescope array to be used as an ANCILLARY of

large gamma-ray spectrometers

Direct (TRANSFER and COULEX) → neutron-rich nuclei

delivered at the new facilities.

FE reaction → proton-rich nuclei

Binary reactions? Coulex with RIBs ...

What is new then?

Digital electronics (with embedded PSA capability)

Triggerless system

nT detectors


TRACEx: the genesis


TRACE: the detectorsFBK-Trento supplied quality 200-µm and 1.5-mm FZ silicon detectors


TRACE for PSAGHT collab for detection of light-charged particles by using PSA

Orsay TANDEM (2011): PSA with single-pad nTD down to 3 MeV;

J.Duenas, D.Mengoni et al., NIMA 676 (2012) 70-73

Orsay TANDEM (2011): PSA with single-pad nTD lower than 3 MeV;

J.Duenas, D.Mengoni et al., NIMA 714 (2013) 48-52

Orsay TANDEM (Apr 2012): PSA with higly segmented Si detector;

B.Genolini et al. NIMA 732 (2013) 87-90

J.Duenas, D.Mengoni et al., NIMA submitted (interstrip)

LNL TANDEM (Dec 2012) : PSA for higher masses;

NIMA in preparation(Digital PSA with FZ detector

CNA Seville TANDEM (June 2013): interstrip effect;

Orsay TANDEM (Oct 2013): comparison analog to digital electronics; 3He.


Mainstream PSA setup

Goals

PSA on light-charged particles [achieved]

Enhance the geometrical resolution via transient signals [on going]

Increse the efficiency getting back the interstrip [some clues]

reduce the telescope to a single layer! [some clues]



SeparationOptimum result


FEE/BEE/DAQ TRACEbottleneck

COMPACT INTEGRATED ELECTRONICS

S.Capra, A.Pullia (Progetto in gruppo V)

R.Aliaga, V.Gonzales, (A.Gadea)

A.Triossi, (M.Bellato)

Collaboration with French partners in GASPARD

AGET electronics ordered

Liaison with IPNO & CEA (highSPID project) for an analog

implementation of the directly in the FEE.


FEE: Preamp + Analog memoriessparse readout and capacitance array

⋆Overlap with GET solution.


PerspectiveProjects and collaborations


PerspectiveFunds and collaborations

Funds

FIRB08, 2014 last year

INFN

Silicon JRA (Fazia), HICONS NTW (EGAN2.0), FULN NTW

(clusters),

Collaborations

GHT ongoing for PSA, interstrip, etc.

GASPARD: collaboration agreement for a common prototype.

GASPARD: liaison for FEE (IPN, CEA)


PerspectiveWork plan


The physics campaign with LNL stable beamThe experimental runs


Complementary detectorsLNL


TRACE+AGATAThree in-beam experiments

Study of High-Lying States in 208Pb with the AGATA Demonstrator

Confirmation of the molecular structure of excited bands in 21Ne

Study of high-lying bound and unbound states in 124Sn and 140Ce

via inelastic scattering of 17O ions


Study of high-lying states in 208Pb and 90Zr17O(340MeV)+90Zr,208Pb.

AGATA DEMO 4ATCs

Scintillator array:Large volumeLaBr3:Ce,BaF2.

Highly segmented Silicon telescope

Pad segmentation: 60 (5x12) pixels

Pixel area of 4x4 mm2, Cooled ∼-30 ◦C

E detector: 1-mm thick

∆E detector: 200-µm thick


Study of high-lying states in 208Pb and 90Zr

Select 17O scattering

Recoil Doppler correction

Select Eγ = TKEL

Lines visible in the pygmy region ∼6MeV

Possible different lines from NRF

RPA calculations


TRACE telescopePerformance of the AGATA-TRACE setup (Coulex)

Z and M up to Z = 9

β ∼20%

16O channel: high energy γ-ray lowbackground from target.....

FWHM ∼ 0.9%

Good PSA performance


Extension to the RIB casepros&cons

H low cross section ∼1 mb (→ Edoardo’s)

H ion-beam energy, in most of the case limited to 10 MeVA

N radioactive-beam intensity (up to 109pps)

� targets: film or plastic (too low energy for the rest)

N equipment (high-efficiency demanded): 1%(∼10MeV) for

γs and 50%, at least, for light ions and particles

⇒ if so, lower limit to 106 for beam current


Conclusions

FZ Detectors existing and in nTD in ordering

PSA achieved under testing conditions (radiation hardness?)

FEE/BEE/DAQ on their way, slowly

Successful experimental activity pursued with AGATA and stable

beam at LNL

extension to the RIB to be explored

Collaborations are vital (GHT,... FARCOS)


Documents

TRACE: silicon-detector array for direct and binary ...colo/SPES/Mengoni.pdf · TRACE: silicon-detector array for direct and binary reaction at SPES Daniele Mengoni for the GHT collaboration