Summary of the Nu STAR neutron detector working

Summary of the Nu. STAR neutron detector working group meeting M. B. Gómez (UPC) / D. Cano Ott (CIEMAT)

Neutron detector working group meeting NUSTAR Neutron detector working group agenda Talk Speaker Status of the MONSTER detector construction at VECC K. Banerjee Status of the MONSTER detector construction at CIEMAT D. Cano-Ott The BELEN detector for DESPEC M. B. Gómez Status of the IGISOL facility construction H. Pentillä Summary of the “IAEA consultants meeting on beta delayed I. Dillmann neutrons”. The “NEutron DEtector developments for Nuclear Structure, D. Cano-Ott Astrophysics and Applications (NEDENSAA)” NUPNET Project Non presencial contributions Satus of the Neu. LAND detector construction Common discussion K. Boretzky

The DESPEC MOdular Neutron Spectrome. TER • Cylindrical cell of 20 x 5 cm filled with 200 detectors, ΔE/E @ 1 Me. V BC 501 A/EJ 301 10 cm radius TOF • Reasonable intrinsic efficiency ( 50% @ 1 Me. V) Geometric distance 1 ns 4 ns • Energy threshold ~ 30 ke. Vee (En 100 ke. V) efficiency (m) • Reasonable energy resolution < 10% up to 5 Me. V: 2 12. 5% 3. 5% 6. 0% • Good neutron timing ~1 ns 3 5. 6% 2. 5% 4. 2% • Good β timing: < 4 ns • Reasonable flight path 2 -3 m TOF Urgent: clarify the time resolution • Good total efficiency: 150 – 200 detectors of the implantation setup Design compatible with the SPIRAL-2 spectrometer Ø=20 cm L=5 cm D. Cano Ott – NUSTAR meeting, Bucharest

The MONSTER collaboration and associated partners CIEMAT Nuclear Innovation – Nuclear Fission Division Dept. of Energy Instituto de Física Corpuscular, Universidad Politécnica de Cataluña (Spain) LPC – Caen (France) University of Jyvaskyla (Finland) Laboratori Nazionali di Legnaro (Italy) – NEDA project University of Uppsala (Sweden) – NEDA project VECC – India D. Cano Ott – NUSTAR meeting, Bucharest

CIEMAT’s + St. Gobain design for the MONSTER cell completed

• 30 cells from St. Gobain have arrived and were sent back to the factory a few months later due to paint peel-off problems. Expected delivery by the end of 2011, beginning of 2012. • 30 Hamamatsu R 4144 PMTs + voltage dividers have arrived. • Additional funding for 10 cells has been obtained in 2011. Total: 40 cells funded

The mechanical structure of the demonstrator is nearly completed. Additional work and funding will be necessary for the 200 module version.

Status of the activities at VECC Ø VECC will fabricate 50 MONSTER cells. Ø Design and engineering drawings have been completed in collaboration with CIEMAT (D. Cano et. al). Ø We are now in the process of fabricating 4 detector as proto-type development. Ø Initial characterisation of the prototype will be done in VECC with the conventional electronics (Mesytec MPD 4 + in-house developed VME based data acquisition system) and after satisfactory test it will be tested with the waveform digitizer being developed at CIEMAT, Spain. Ø After satisfactory test we can send these detectors for the experiment under PRESPEC umbrella and start production of the rest of the detectors. K. Banerjee , NUSTAR meeting, Bucharest Government of India Department of Atomic Energy

The MONSTER cell construction plant at VECC

BEta de. Lay. Ed Neutron detector M. B. Gómez Hornillos, R. Caballero, A. Riego G. Cortés, A. Poch, C. Pretel, F. Calviño SEN, Universitat Politecnica de Catalunya Barcelona, SPAIN J. L. Taín, A. Algora, C. Domingo-Pardo, J. Agramunt and Gamma Spectroscopy Group IFIC- Valencia, SPAIN D. Cano, T. Martínez, A. García and Nuclear Innovation Group CIEMAT-Madrid, SPAIN I. Dillmann Uni Giessen and GSI, GERMANY A. Yeremin , A. Popeko, E. Sokol JINR, RUSSIA Bucharest 2011 SEN, UPC, Barcelona

SUMMARY OF ACTIVITIES WITH NEUTRON COUNTERS ü Design of the prototype of the Beta Delayed Neutron detector with Monte Carlo simulations MCNPX and GEANT 4. Four different versions: § BELEN-20 atms for JYFL (2 versions). Used in experiments § BELEN-30; 20 @ 20 atm, 10 @ 10 atm for GSI. Used in exp. § BELEN-90 for FAIR. Under design. ü TDR in progress. Preliminary version. ü Two BELEN-20 detectors constructed at UPC workshop. ü Test of BELEN-20 detector with laboratory. 252 Cf source at UPC ü Experiment at JYFLTRAP (Finland) to measure β delayed neutron emission of fission fragments (in collaboration between UPC, IFIC and CIEMAT): § Nov 2009: 95 Rb, 88 Br, 94 Rb, 138 I. § Jul 2010 : 95 Rb, 88 Br, 85 As, 86 As, 85 Ge, 91 Br, 137 I. ü Neutron Background test at S 4 in GSI. ü Experiment at GSI with BELEN-30 & SIMBA September 2011, nuclei of astrophysical interest: § S 323: 127 Pd, 126 Pd, 128 Ag. Montes et al § S 410: 215 Tl, 211 Hg. Domingo, Dillmann, Taín, Gómez et al M. B. Gómez et al. SEN, UPC, Barcelona

BELEN-30 at GSI BELEN-30 Polyethylene shielding Isomer tagger MUSIC SIMBA implantation det M. B. Gómez et al. SEN, UPC, Barcelona

Measurement of beta delayed neutron emission of astrophysical interest at GSI: PRELIMINARY ANALYSIS Preliminary Identification Z (+ 1) S 410: 217 Pb 214 Tl 211 Hg A/q M. B. Gómez et al. SEN, UPC, Barcelona

Measurement of beta delayed neutron emission of astrophysical interest at GSI: PRELIMINARY ANALYSIS Counts Energy deposited in 3 He neutron counters. Noise Neutron signal Pulser Energy (ch) M. B. Gómez et al. SEN, UPC, Barcelona

Measurement of beta delayed neutron emission of astrophysical interest at GSI: PRELIMINARY ANALYSIS Energy deposited (ch) SIMBA: Energy deposited in Si strips Implantation Beta decay Noise Strip # M. B. Gómez et al. SEN, UPC, Barcelona

Neu. LAND: The High Resolution Neutron Time-of-Flight Spectrometer for R 3 B Neu. LAND detector parameters: full active detector using RP/BC 408 face sice 250 x 250 cm 2 active depth 300 cm 3000 scintillator bars 6000 PM / readout channels 32 tons Neu. LAND design goals: >90% efficiency for 0. 2 -1. 0 Ge. V neutrons Multi-hit capability for up to 5 neutrons invariant-mass resolution: Neu. LAND-target distance 35 m ∆E < 20 ke. V at 100 ke. V above the neutron threshold Konstanze Boretzky for the Neu. LAND WG in R 3 B -- Bucharest - Oct. 2011

From Submodules to Full Detector Neu. LAND submodule 250(270 incl. light guides)x 5 x 5 cm 3 100 submodules build one double-plane 30 double-plane build up Neu. LAND face sice 250 x 250 cm 2 active depth 300 cm Konstanze Boretzky for the Neu. LAND WG in R 3 B -- Bucharest - Oct. 2011

Performance Examples high multi-neutron recognition: high resolution at the particle threshold: 1 neutron 600 Me. V 35 m distance to target Erel =100 ke. V high efficiency for low neutron energies: En [Me. V] Eff. [%] 50 79 100 94 150 95 200 91 Konstanze Boretzky for the Neu. LAND WG in R 3 B -- Bucharest - Oct. 2011 4 neutrons „tetra-neutron“ 600 Me. V 35 m distance to target Erel =100 ke. V

Neu. LAND October 2011 very, very busy TDR due on Nov. 1 st Convener: Konstanze Boretzky, GSI Darmstadt, Germany Deputy: Ushasi Datta Pramanik, SINP Kolkata, India GSI Darmstadt: D. Bertini, K. Boretzky, J. Hehner, M. Heil, G. Ickert, Y. Leifels, D. Rossi, H. Simon HZDR Dresden-Rossendorf: D. Bemmerer, T. Cowan, Z. Elekes, M. Kempe, M. Sobiella, D. Stach, A. Wagner, J. Wüstenfeld, D. Yakorev TU Darmstadt: T. Aumann, C. Caesar, D. Gonzalez Diaz, A. Ignatov, D. Kresan, H. Scheit TU Dresden: T. Cowan, M. Röder, K. Zuber U Cologne: J. Endres, A. Hennig, V. Maroussov, A. Zilges U Frankfurt: R. Reifarth, M. Volknandt India: SINP Kolkata: P. Basu, S. Chakraborty, S. Chatterjee, U. Datta Pramanik, J. Panja, A. Rahaman Portugal: LIP Coimbra: A. Blanco, P. Fonte, L. Lopez -- U Lisbon: D. Galaviz Redondo, J. Machado, P. Teubig Romania: ISS Bucharest: M. Cherciu, M. Ciobanu, M. Haiduc, M. Potlog, E. Stan Russia. Kurchatov Institute Moscow: L. Chulkov PNPI St. Petersburg: G. D. Alkhazov, V. A. Andreev, A. A. Fetisov, V. L. Golovtsov, E. A. Ivanov, A. G. Krivshich, L. N. Uvarov, V. V. Vikhrov, S. S. Volkov, A. A. Zhdanov Konstanze Boretzky for the Neu. LAND WG in R 3 B -- Bucharest - Oct. 2011

Brief status of Jyväskylä IGISOL move Cyclotron beams and beam lines • MCC 30/15: worked in the STUK (national radiation safety authority) inspection: 150 µA in a pulse in low duty cycle • Beam tube to IGISOL cave installed • K 130: Beam line installed; beam tuning test planned 24. October JYFLTRAP: • Cooled down and powered in August, shimmed, tested, running • Waiting for the beam line and HV platform to be built LASER: • Laser cabins have been build, air conditioned - ready to start install instrumentation Separator front end and beam lines: • Most of the beam lines built • Parts are installed at the rate mechanical workshop can produce them • Part of the work outsourced (actuators) • Control system under construction Xmas miracle…? First beam! H. Pentillä

IAEA Consultants Meeting on b-delayed neutron emission evaluation 10. -12. October 2011 Last evaluation: Rudstam, Aleklett and Shiver, ADNDT 53, 1 (1993) Last compilation: Pfeiffer, Kratz, Möller (2001): ar. Xiv: nucl-ex/0106020 • Problem 1: Missing documentation • Problem 2: Last compilation 10 years ago => more data available now • Problem 3: Good standards available? • Problem 4: Up to now only fission region was evaluated Main conclusion: Need of a "Co-ordinated Research Project" (CRP) on b-delayed neutron evaluation for reactor physics and astrophysics NUSTAR week 2011 Participants: • D. Abriola (IAEA Nuclear Data Section, Vienna/ Austria) • D. Cano Ott (CIEMAT Madrid/ Spain) • I. Dillmann (JLU Giessen/ GSI Darmstadt, Germany) • M. Kellett (IAEA Nuclear Data Section, Vienna/ Austria) • B. Pfeiffer (JLU Giessen/ Germany) • B. Singh (Mc. Master University, Hamilton/Canada) • A. Sonzogni (NNDC Brookhaven/ USA) • J. L. Tain (IFIC Valencia/ Spain) Bukarest, Oct. 17 -21, 2011 Iris Dillmann

The NEutron DEtector developments for Nuclear Structure, Astrophysics and Applications (NEDENSAA) NUPNET project is an effort to pool available resources and on going R&D by the various partners throughout Europe with the aim of providing significant improvements in neutron detection. Working Package 1: Development of new materials Working Package 2: Characterisation of scintillator materials for neutron detection Working Package 3: Innovative detector concepts Working Package 4: Photosensors Working Package 5: Processing technologies Working Package 6: Optimal design of neutron detectors and γ-ray detectors Working Package 7: Training and networking The NUSTAR neutron detector working group was the seed of the project and its activities are naturally integrated into it. Official link between the developments for FAIR and SPIRAL 2. Partners: INFN – Legnaro (Italy) CNRS – IN 2 P 3 (France) CEA (France) associate University of Jÿväskÿla (Finland) CIEMAT – Madrid (Spain) IFIC – Valencia (Spain) TU Dresden (Germany) INRNE (Bulgaria) TÜBITAK (Turkey) associate University of Uppsala (Sweden) associate

Additional remarks of Neutron WG • A school on neutron detectors and Monte Carlo simulation (GEANT 4) should be organised for the youngest scientist. Last school organised at CIEMAT more than three years ago. • The demand of beam time for tests will be increased in the mid term future. The FAIR management has to include it into its development plants and make more beam time available. • Several partners have expressed the need of purchasing equipment via NUSTAR/FAIR for getting better prices.

Detector Status of the project Neu. LAND Design fixed. Tests ongoing LENA Tests ongoing at GSI Demonstrator with 30 counters tested at JYFL and BELEN FRS. CIEMAT (40 cells): 30 cells arrived. Sent back to factory for reparation (leaks and paint peel off). Extra funding for 10 MONSTER cells obtained. VECC: 4 prototypes under construction. 50 detectors planned. TDR Completion time Due date end of 2011 2014 (November 1 st) In preparation. Expected by 2012 end of 2011 First version circulating 2012 – 2013 In preparation. Expected by end of 2011. 2014 - 2015