NEUTRON DETECTOR

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DESPEC (DECAY SPECTRSCOPY)
NEUTRON DETECTOR
GE ?-ARRAY
RADIOACTIVE BEAM
DSSD IMPLANTATION DETECTOR
decay spectroscopy (RISING) alpha,
beta, gamma, internal decay, p,
10-5...103 particle/s
Radioactive beams 100 to 1000 more intense than
now
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Salamanca, Spain, B. Quintana Sofia, Bulgaria, G.
Rainovski, S. Lalkovski, M. Danchev Swierk,
Poland, SINS, E Ruchowska, S. Kaczarowski St.
Petersburg, Russia, RI, I. Izosimov Stockholm,
Sweden, B. Cederwal, A. Johnson Strasbourg,
France, IRES, G. Duchêne Surrey, UK, University
of Surrey, W. Gelletly, Zs. Podolyak, P. Regan,
P. Walker Tennessee, USA, ORNL, R.
Grzywacz Uppsala, Sweden, Uppsala University, H.
Mach, J. Nyberg Valencia, Spain, IFIC,
CSIC-Univ. Valencia, B. Rubio, J.L.Taín. A.
Algora Warsaw, Poland, University of Warsaw, W.
Kurcewicz, M. Pfutzner
Members of the DESPEC Collaboration Aarhus,
Denmark , H. Fynbo Barcelona, Spain,
Univ.Politécnica Cataluña, F. Calviño, B. Gómez
Hornillos Bordeaux, France, B. Blank Bucharest,
Romania, IFIN-HH, N.V. Zamfir, M. Ionescu-Bujor
et al. Camerino, Italia, Univ. Camerino, D.L.
Balabanski Daresbury. UK, CCLRC, J. Simpson,
I.Lazarus, V.Pucknell and Daresbury
engineers Darmstadt , Gremany, GSI, D. Ackerman,
M. Górska, J. Gerl Kojouharov , C.
Scheidenberger et al. Darmstad Uni. N.
Pietralla Edinburgh , UK, Univ. Edinburg, P.J.
Woods, T. Davinson Gatchina, Russsia, PNPI, L.
Batist Giessen, Germany, W. Plass Guelph, Canada,
Univ of Guelph, P.Garrett Jyväskylä , Finland,
Univ. of Jyväskylä , J. Äystö, A. Jokinen, P.
Jones, R. Julin, M. Leino, H. Penttilä., J.
Uusitalo , C. Scholey Leuven, Belgium, Univ. of
Leuven, M. Huyse, G. Neyens, P.
v.Duppen Liverpool, UK, Univ. of Liverpool, R. D.
Page Lund, Sweden, Univ. Lund, D. Rudolph Köln,
Germany, Univ. Köln, J. Jolie, P. Reiter Krakow,
Poland, IFJ PAN, A. Maj et al. Madrid, Spain,
CIEMAT, D. Cano-Ott, E. González, T. Martínez
Madrid, IEM, A. Jungclaus Mainz, Germany, Univ.
Mainz, K.-L. Kratz Manchester, UK, Univ.
Manchester, D. Cullen Munchen, Germany, T.
Faestermann, R. Krücken
37 institutes
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Ordering of quantum states
r-process abundances
mass number A
information on excited states essential!!
Assumption of N82 and N126 shell quenching
leads to a considerable improvement in the global
abundance fit in r-process calculations
A. Jungclaus et al., Phys. Rev. Lett. 99, 132501
(2007) pre
DESPEC experiment
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AIDA Advanced Implantation Detector
Array Coordinator T. Davinson
8 x 8 cm 128 x 128 strips 1 mm (Micron in
progress) 3 dssd
?E
8 cm
Veto
Coordinator T. Davinson Univ. Edinburgh
ASIC development
24 cm
www.ph.ed.ac.uk/td/AIDA TDR submitted in
January 2009
detects implantation GeV decay keV-MeV
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AIDA Advanced Implantation Detector Array
Coordinator T. Davinson Univ. Edinburgh
www.ph.ed.ac.uk/td/AIDA TDR submitted in
January 2009
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Planar Ge Array
24 stacks of 3 DSS-Planar detectors Imaging and
tracking array

Very high pixellation but also high complexity
Coordinator A. Jungclaus IEM Madrid
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Two the possible Ge arrays
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Meetings
The DESPEC Ge array working group

• February 2005
• GSI, Germany
• April 2005
• Surrey, UK
• November 2005
• Madrid, Spain
• February 2006
• GSI, Germany
• November 2006
• Madrid, Spain
• March 2007
• GSI, Germany
• October 2007
• Huelva, Spain
• February 2008
• GSI, Germany
• July 2008
• GSI, Germany
• November 2008

Coordinator A. Jungclaus (Madrid)
1) Daresbury Laboratory UK 2) University of
Liverpool UK 3) University of Surrey UK 4)
IEM Madrid Spain 5) Universidad de
Salamanca Spain 6) IFIC Valencia Spain 7)
GSI Darmstadt Germany 8) Universit ät zu
Köln Germany 9) IFIN-HH Bucharest Romania 10)
University of Camerino Italy 11) University of
Jyvaskyla Finland 12) University of
Sofia Bulgaria 13) Royal Inst. of Tech.,
Stockholm Sweden 14) IReS Strasbourg France
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Examples for ongoing work on MC simulations
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There are two initiatives to construct
these Detectors one at GSI co-financed by
Spain The other in Spain in collaboration with
Companies The aim is to have a prototype ready
for 2011
Until the GE DESPEC array is ready we can use
Rising detectors
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Neutron detectors
For neutron rich nuclei it is very important to
measure beta delayed Neutrons branching as well
as energy
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Coordinator (D. Cano-Ott, Ciemat Madrid)
Two neutron detector Set-ups
Array of liquid scintillators (BC501A or similar)
4? detector. Similar to the NERO
A TOF detector
BF3 prop. Counters
Polyethylene matrix
3He prop. Counters
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Conceptual design Good efficiency (200
detectors) Good energy resoltuion (10 up to 5
MeV) Good time resolution (Good time resoltuion
of AIDA, 1ns/4-6 ns) 3 m TOF
Prototypes exists, experiments plan at
Braunschweig And Juväkylä this year
Neutron gamma discrimination
Digitiser for TOF spectrometer Two interlaced
ADCs 500 Msamples/s 12 bit resolution. FPGA
fast enough DSP. 2 Gbytes on board memory. On
board pulse shape analysis OR fast data
transmission. fast data bus (not yet
decided). Cost estimate 1000 1300 / channel
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Small verssion of final detector ready to take
data in Jyväskyä and Braunshweig
Simulations
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A Total Absorption Spectrometer for
DESPECAccurate measurement of gamma branch
Coordinator J.L. Tain IFIC Valencia
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Fast Timing Array at FAIR
Coordinaor H. Mach Upsala University
Basic array 36-48 LaBr3(Ce) detectors
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Time dependent Perturbed Angular Distribution
Unique opportunity to measure g-factors and
Q-moments in a wide range of masses
g factors in a high magnetic field Q-moments,
implantation in a crystal with a gradient
electric field
Coordinator D.L. Balabanski, Sofia
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Workshop Daresbury October 2008
Table B.5 Time plan for PRESPEC experimental
campaigns.

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Appendix HISPEC/DESPEC collaboration
structure Management Board
HISPEC/DESPEC collaboration structure Management
Board
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Ready for beam AIDA implantation and decay
detector by 2011 (prototype 2009) To be used
with available Cluster Ge array Next
HISPEC/DESPEC collaboration meeting 23-24 March
2009 DESPEC Ge meeting 9-1300 23 March
2009 HISPEC/DESPEC simulation meeting 23/24
March 2009 NUSTAR iMoU signed
FIN
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HISPEC/DESPEC Technical Board