A new high granularity Silicon Array for future reaction studies - - PowerPoint PPT Presentation

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A new high granularity Silicon Array for future reaction studies - - PowerPoint PPT Presentation

Feb 23, 2024 401 likes •696 views

A new high granularity Silicon Array for future reaction studies D.Beaumel, Unit mixte de recherche CNRS-IN2P3 IPN Orsay Universit Paris-Sud 11 91406 Orsay cedex Tl. : +33 1 69 15 73 40 Fax : +33 1 69 15 64 70 http://ipnweb.in2p3.fr

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A new high granularity Silicon Array for future reaction studies

D.Beaumel, IPN Orsay

Unité mixte de recherche CNRS-IN2P3 Université Paris-Sud 11 91406 Orsay cedex Tél. : +33 1 69 15 73 40 Fax : +33 1 69 15 64 70 http://ipnweb.in2p3.fr

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Terra incognita

Skin, Pygmys np pairing rp process r-process Cluster transfer n transfer p transfer

Direct reactions

Shell Evolution Pairing changes d transfer 1(2)-nucleon transfer 2n transfer Haloes, Clusters

A great tool to investigate Exotic Nuclei and astrophysics processes Case of transfer reactions:

Good energy regime : few MeV/u few tenths of MeV/u

Methodology : Radioactive Ion Beam Light target (H,He…) Detect the recoil particle with high accuracy

Silicon technology

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Landscape of Si detectors for DR studies

1997 2007 2017~ MUST

coll.: IPN,CEA-Saclay, DAM

MUST2

coll.: IPN,CEA-Saclay, GANIL

GASPARD

coll.: IPN, INFN, BARC Irfu,Huelva,STFC,Surrey,GANIL Cooling Connectors Preamplifiers Detectors

Light Beams Fission fragments Particle spectrocopy

Ex resolution: ~500keV

Particle-Gamma Spectroscopy

Ex resol.: ~5keV (AGATA case)

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300(500) µm DSSD pitch < 1mm 1(or 2) x [1.5 mm DSSD pitch~1mm] 2 main shapes : square & trapezoid, large area

Option: Annular detectors

Beam

“GASPARD-TRACE” design ~ 10000 channels (Digital) high transparency to γ-rays

Big integration challenge

Electronics : Layers of Silicon

4π, fully integrable in PARIS/AGATA/EXOGAM2

A new Si array for reaction studies

Other features: State of the art for PID Pulse Shape Discrimination Special targets (pure H,D) Portable device AGATA

GASPARD

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Collaboration

  • IPN Orsay , CEA Saclay, GANIL, LPC Caen (France)

e)

  • INFN Univ. of Padova, INFN-LNL Legnaro , INFN Univ. of Milano

(Italy).

  • Univ. of Huel

elva, Univ. of Santiago de Compostel ella, Univ. of Valen encia (Spain)

  • Univ. of Surrey

ey, STFC Daresbury (UK)

  • BARC, Mumbai (India).
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GASPARD-TRACE collaboration agreement

Under elaboration (D.Mengoni, DB) Goal : converge towards a common portable device to be used at 2 phases scheme : 2015-2017 : (full) Si prototypes developments, Electronics dev. and full definition, TDR 2017 ~ 2019? : Construction

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Goal: establish the method for light particles and highly segmented detectors

R&D on Pulse Shape Discrimination with DSSD

Effect of segmentation Lower E threshold for each particle ? Minimum sampling frequency (Digital elec) n-side or p-side ? Filters (e.g. Haar wavelets transform, …) Other possible observable : Rise time ? Radiation damage ….

test experiments at the IPNO tandem Detector:

  • 500 um nTD DSSD

BB13 design of MSL

  • 8° cut
  • 128X+128Y
  • pitch<500um
  • special package

90° kapton readout high density connectors

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nTD 100um/500um 128X+128Y strips BB13 Preamps : PACI gain ~32 mV/MeV Digitizers : 5 MATACQ - 1GHz sampling GANIL DAQ : 20 digital channels 10Hz

beam 7Li Imax E=Qmax Current Charge Time (ns) 40um 500um nTD

8 PACIs 32mV/MeV

I Q

5 MATACQ (20 ch) 1GHz GANIL DAQ (~10Hz)

4p 4n

PSD for Z=1 particles

Test experiment at IPNO tandem Reaction:

7Li + 12C @ 35 MeV

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Reaction :

7Li + 12C at 35 MeV

Discrimination achieved down to E < 2.5 MeV

PSD for light particles - Results

M.Assié et al., EPJA(2015)

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For Z=1, p, d, t : Discrimination down to 2.5 MeV for 300V Amplitude of current signal sufficient @ 300V ➨Analog electronics ? Peak finder ?

The sampling rate should be higher than 200MHz

PSD - Results for Z=1 particles

  • Effect of bias : best compromise is 300V
  • Effect of P and N-side: lower threshold on P-side
  • Other observables and Filters (Haar wavelets )
  • Effect of sampling frequency : loss of discrimination below

250MHz M.Assié et al., EPJA(2015)

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3He

Reaction : (d,3He) on mylar @ 26 MeV

  • 3He/4He discrimination
  • test of analog peak finder on current

40um 500um nTD

8 PACIs 32mV/MeV

I Q

Wavecatcher (48 ch) 1GHz (1028points) Wavecatcher DAQ 80/s

4p 4n

Peak finder

PAD 500um

3He from ∆E-E

Good 3He/4He separation

Digitalization (N and P coincidence)

∆E (a.u.) E (MeV)

∆E-E with 40um detector

PSD for Z=2 particles

Add a ∆E detector for PID

(IPNO tandem)

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Final design (approved)

Silicon detectors plan (short term):

.1st layer (trapez.): 2 prototypes ordered (Micron) in 2013 (IPNO)

  • 1st layer(square) : 2 prototypes ordered

(Micron) in 2014 (INFN-Padova) .2nd layer (thick square) & 2nd layer (thick trapez): BARC-IPNO

Test bench Test of uniformity In resistivity Leakage current /strip, capacitance/strip, interstrip resistance Specifications

  • large area , 6’’ wafers, nTD, 500um thick
  • 128X+128Y (pitch~700 um)
  • <100> random cut (8deg)
  • Thin frame / Kapton readout at 90deg /High

density connectors

Silicon developments

Trapezoid under commissioning

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Received June 23, 2015

Trapezoid DSSD prototype

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GHT 2015 meeting 14/22 Rosier Ph– IPNO–RDD– 150325

ELECTRONICS

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Integration of electronics

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FEE architecture (preliminary)

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ASIC internal architecture

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The CHyMENE H/D target system

Cible d’HYdrogène Mince pour l’Etude des Noyaux Exotiques

System providing continuous extrusion of 1H or 2H through a rectangular extruder nozzle defining the target-film thickness

CHyMENE collaboration :

  • CEA/IRFU Saclay

project coordinator: A. Gillibert

  • IPN Orsay
  • CEA/DAM Bruyères

Grant from French ANR ~550k€

Hydrogen target in a solid phase near triple point sH2 ~ 17 K Thickness 50 – 200 µm No window - C free Continuous flow in vacuum 2-10mm/sec Compatible with particle detection

IRFU-IPNO- DAM

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IRFU-IPNO- DAM

CHyMENE - Design

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IRFU-IPNO- DAM

CHyMENE - Status

  • Now being commissioned

Test under beam beg. of 2016

  • Further tests of thin ribbon

production needed (Nozzle material, geometry surface treatment, …)

  • Need implement system for

thickness measurement presently: α-source+SD

5mm

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Timelines

2017 ~ 2019? DSSD prototypes development

Detectors Elec.

FEE developments PACI preamp ASIC

Mechanics

thick Si proto develop. Bench for DSSD& thick Si

R&D PSD

Test experiments 2014 2015 2016

Full array

TDR

Production DSSD/ Si thick

  • Mechan. & electronics

Mechanical design Data analysis Signal processing / simulations

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To perform high resolution reaction studies using AGATA@ VAMOS The new SPIRAL1 beams In particular stripping reactions e.g. (d,p) GASPARD-TRACE prototypes + few MUST2 telescopes One-layer philosophy (VAMOS) CHYMENE MUST2 electronics with new connectics 100 k€, 2 years (start : 2017)

MUGAST

(MUST2 - GASPARD – TRACE)

Implementing an intermediate configuration

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Efficiency of AGATA 1π ~8%

MUGAST

(MUST2 - GASPARD – TRACE)

TO VAMOS Beam

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MUGAST with EXOGAM & PARIS

MUGAST+ 6 EXOGAM « MUGAST » configuration = MUST2 + GASPARD (trapeze) +TRACE (square)

available for AGATA campaign at GANIL (2017) read by MUST2 electronics (MUFEE+MUVI)

Possible gamma detector’s configurations :

6 PARIS clusters (if available) 6 EXOGAM

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Thank you