Grze Jaworski Pr-Anders Sderstrm on behalf of NEDA collaboration - - PowerPoint PPT Presentation

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Grze Jaworski Pr-Anders Sderstrm on behalf of NEDA collaboration - - PowerPoint PPT Presentation

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Grze Jaworski Pr-Anders Sderstrm on behalf of NEDA collaboration NUSPIN, GSI, June 28 th , 2017 Outline Physics with NEDA. Why (a new) neutron multiplicity filter and how to built one? R&D: single cell;

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Grze Jaworski ś Pär-Anders Söderström

  • n behalf of NEDA collaboration

NUSPIN, GSI, June 28th, 2017

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Outline

→ Physics with NEDA. → Why (a new) neutron multiplicity filter and how to built one? → R&D:

  • single cell;
  • scintillator;
  • full geometry;
  • PMT;
  • timing;
  • NGD;
  • electronics;
  • NEDA + NW @ GANIIL geometry;
  • Production and characterisation (ongoing).

→ AGATA + NEDA campaign coming. NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Physics with NEDA

J.J. Valiente-Dobon /

  • E. Clement: Octupoles and

Quadrupoles in Xenons J.J. Valiente-Dobon /

  • E. Clement: Octupoles and

Quadrupoles in Xenons M.A. Bentley:

65As isospin symetry

M.A. Bentley:

65As isospin symetry

  • A. Boso: 71Kr – 71Br:

isospin symmetry, shape coexistence

  • A. Boso: 71Kr – 71Br:

isospin symmetry, shape coexistence

  • B. Cederwall:

88Ru – T = 0 pairing

  • B. Cederwall:

88Ru – T = 0 pairing

  • J. Nyberg: 102,103Sn

n-n, SPE, N=Z=50 ex.

  • J. Nyberg: 102,103Sn

n-n, SPE, N=Z=50 ex.

  • M. Palacz: 94Pd

lifetimes, high spin

  • M. Palacz: 94Pd

lifetimes, high spin

  • S. Lenzi: A=63

isospin symmetry

  • S. Lenzi: A=63

isospin symmetry

  • B. Fornal: 14C

clusterization

  • B. Fornal: 14C

clusterization

NEDA talk @ NUSPIN, GSI, June 28th, 2017

See Gilles' talk tomorrow 10:15 See Gilles' talk tomorrow 10:15

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n selection

EXOGAM experiment: 58Ni (240 MeV) + 54Fe

no gate on neutrons 1n gated

4p 3pn

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Why a new array?

An example: Attempt to study 100In – 1n 1p-1 outside 100Sn 3n evaporation channel – the only 3n case with NWall (+ EUROBALL)

100In not observed, but observation only a matter of statistics.

10x statistics: ½ a a year with EXOGAM + NWall, → → 2-3 weeks with EXOGAM + NEDA. Other crucial nuclei accessible in 3n evap. channels, including 101Sn. NEDA talk @ NUSPIN, GSI, June 28th, 2017

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New array

→ Goal: develop a neutron detector array to be used with AGATA, GALILEO, EXOGAM2, etc. for experiments with high intensity stable and radioactive ion beams (SPES, SPIRAL2, …) → Requirements:

  • excellent neutron-gamma discrimination (NGD);
  • good timing;
  • superior 1n/2n/3n/... discrimination;
  • capability to run at high counting rates;
  • be versatile (energy resolution for reaction studies;
  • cope with large neutron multiplicities (reactions with neutron-rich RIBs).

Want best quality do it yourself! →

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Single cell

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Single cell

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Scintillator

n on p n on d ? BC501A / BC537 / EJ299 / … ? preliminary g BC537 g BC501A n BC537 n BC501A NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Full geometry

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Timing

Digital timing algorithm for various 5” PMTs

PMT tests for best timing for NEDA PMT tests for best timing for NEDA

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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NGD

Digital PSA algorithm for various 5” PMTs

PMT tests for best NGD for NEDA PMT tests for best NGD for NEDA

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Electronics

→ NUMEXO2 board → GTS on board → GTS logic trigger tree → 200 MHz, 14 b (11.3 enob) Mezzanines FADC NEDA talk @ NUSPIN, GSI, June 28th, 2017

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NEDA @ GANIL

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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NEDA @ GANIL

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Self-production

→ Detector vessels and PMT housings are made by welding flanges to hexagonal profiles → EJ520 TiO2 paint; TorrSeal; 5” 5mm BK7 glass → Expansion bellow – DT = 40 K. → EJ301 (BC501) liquid scintillator → SBA R11833-100HA 5” PMT (32% Q.E.) → custom transistorized VD provided by wierk Ś → mu-metal shielding (1 mm) → NUMEXO2 → Single ended to differential converter (production) → Array structure (produced, under tests)

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Detector production

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Detector production

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Detector production

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Characterisation

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Characterisation

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Artjfjcial Neural Networks

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p(7Li,n)7Be LICORNE @ ALTO

FOM = 1.88 for (50-200)keVee

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The work continues....

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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GANIL 2018: AGATA +

AGATA @ 145 mm NEDA(54)@ 510 mm NW (42)@ 650 mm NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Summary

  • Versatile neutron detector to be coupled to g-ray arrays and charged

particle detectors.

  • High performance neutron multiplicity filter based on the liquid

scintillator EJ301 with excellent neutron-gamma discrimination capabilities.

  • The first campaign of physics will be NEDA coupled to AGATA@ GANIL

with stable beams in 2018 - fusion evaporation reactions along N=Z.

  • Versetile: Potenciality with future RIB: transfer reactions (3He,n), (d,n);

plunger measurements (access to transition probabilities).

  • The work continues.... (we will further invest in R&D of new materials

and techniques to improve the neutron detection eff., discrimination, …). NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Collaboration

  • G. de Angelis, S. Carturan, E. Clement, X. Egea, N. Erduran, S. Ertürk,
  • G. de France, A. Gadea, A. Goasduff, V. Gonzalez, K. Hady ska-Kl k, T. H

ń ę üyük,

  • M. Jastrz b, G. Jaworski, V. Modamio, M. Moszy ski, A. Di Nitto, J. Nyberg,

ą ń

  • M. Palacz, E. Sanchis, P.-A. Söderström, D. Testov, A. Triossi, J.J. Valiente

Dobon, R. Wadsworth It's good for you! NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Backup slides follow

NEDA talk @ NUSPIN, GSI, June 28th, 2017

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Full advantage of digital electronics can be obtained using artjfjcial neural networks to perform pulse-shape discriminatjon. This method is currently being investjgated both for BC537 and BC501A. + Optjmal discriminatjon over a large energy range

  • Slower implementatjon limits countjng rate

BC-537

NEDA test: PSA Neural Network

P.-A. Söderström(Uppsala University, Uppsala, Sweden)

Monday and Thursday talk by G. Jaworski Monday and Thursday talk by G. Jaworski