1. 38th LNF Scientific Committee for the AMADEUS collaboration
Status report
38th LNF Scientific Committee
May 11, 2009
Johann Zmeskal
for the AMADEUS collaboration
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AMADEUS at DANE
Antikaon
Matter At
DANE:
Experiments with
Unraveling
Spectroscopy
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The scientific case of the so-called “deeply bound kaonic nuclear states” is hotter than ever, both in the theoretical (intensive debate) and experimental sectors.
What emerges is the strong need for a complete experimental study of the scientific case, i.e. a clear and clean experiment (so without the need to make hypothesis on involved physics processes), measuring kaonic clusters both in formation and in the decay processes.
AMADEUS’s main aim is to perform the first full acceptance, high precision measurement of DBKNS both in formation and in the decay processes, by implementing the KLOE detector with an inner AMADEUS-dedicated setup, containing a cryogenic target and a trigger system (and an inner tracker in a second phase).
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Either situations:
EXISTENCE or NON-EXISTENCE
of the deeply bound kaonic nuclear
clusters will have strong impact in
kaon-nucleon/nuclei physics!!!
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5. Production methods of antikaon-mediated bound nuclear cluster
stopped K- reactions on light nuclei
in-flight K- reactions
protons on proton (or light nuclei)
heavy ion collisions
 necessary:
dedicated experiments
exclusive measurement
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Planned experiments
the future experiments in Japan at J-PARC will produce
kaonic nuclear states only with K--induced reactions in-
flight (E15; E17)
alternative approaches followed at GSI with FOPI using
proton-nucleus collisions at beam energies close to the
strangeness production threshold and with nucleus-
nucleus collisions
a dedicated facility – AMADEUS at DANE will study
antikaon-mediated bound nuclear systems with K- induced
reactions at rest
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7. Experimental programme AMADEUS phase-1 (1)
study of the (most) fundamental antikaon deeply bound nuclear systems, the
kaonic dibaryon states: ppK- and (pnK-)
produced in a 3He gas target, in formation and decay processes
as next step, the
kaonic 3-baryon states: ppnK- and pnnK-
produced in a 4He gas target, in formation and decay processes
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8. Experimental programme AMADEUS phase-1 (2)
Low-energy charged kaon cross section on p, d, He-3 and He-4, for K- momentum lower than 100 MeV/c (missing today);
The K- nuclear interactions in Helium
(poorly known – based on one paper from 1970 …)
Properties of L and charged S´s
for example decays in channels with a neutrino
→ astrophysics implications (cooling of compact stars)
Resonance states as L(1405) or the S(1385) could be better understood with high statistics;
their behaviour in nuclear medium can be studied, too.
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9. Analysis of a sub-set of the KLOE data
(Oton Vazquez Doce)
excellent feasibility test
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AMADEUS plans
AMADEUS phase-1:
start after KLOE-2 step0 (2011),
with the study of di- and tri-baryon kaonic nuclei and low-energy kaon-nucleon/nuclei interactions
AMADEUS phase-2:
after 2012 , higher integrated luminosity,
refined study of di- and tri-baryon kaonic nuclei; extend to other nuclei, ….
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AMADEUS setup
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KLOE
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KLOE
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AMADEUS – version 2
Tracking device:
TPC-GEM or
3-4 C-GEMs
Kaon trigger:
Scint. fibers
with SiPMs
Target system:
cylindrical
cryogenic cell
in vacuum chamber
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AMADEUS activities
KLOE data - feasibility analyses
EU – Hadron Physics 2
AMADEUS physics case and setup definition;
MCarlo simulations
R&D for AMADEUS setup: SiPM and TPC – GEM
Slow Controls and DAQ – with KLOE
Neutron efficiency of KLOE Calorimeter - KLONE
Agreement between KLOE and AMADEUS
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16. EU 7th Framework Programme
Activities within the
EU 7th Framework Programme
Hadron Physics 2
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SEVENTH FRAMEWORK PROGRAMME Capacities Specific Programme Research Infrastructures
Networking Activities
Transnational Access Activities
Joint Research Activities
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18. Low Energy Antikaon-Nucleon (Nucleus) Interaction Studies

21. JointGEM
Ultra-light and ultra-large tracking system based on GEM technology WP 24

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JointGEM
OBJECTIVES
The next generation of experiments in hadron physics aims at studying rare processes with drastically improved sensitivity. The technical requirements to reach this goal include high beam intensities and luminosities, fast detectors with large acceptance and high resolution.
KLOE2 and AMADEUS at DAFNE-LNF, Frascati, Italy, and PANDA and CBM at FAIR, Darmstadt, Germany.
An essential part of all these experiments is a detector for charged particles with excellent tracking capabilities covering large areas or volumes with an extremely low material budget in order not to spoil the energy and mass resolution of the apparatus.
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23. GEM – TPC working places
General:
Material tests (Aging, Geometry)
Resistors:
Concept Availability, Delivery QA & Selection
GEM: (2C)
Outgasing/Aging (GRP support) Purchase & Delivery
Structure: GR-PBT
Tooling & Manufacturing (Timescale)
Sensors:
Read out concept Slow-Control Integration
FEE:
Basic concept Supply Setup / Tests
Several hundred pieces
Cooling:
Operation conditions Heat dissipation Temperature Stability
Operation:
Heat-Shielding/-FlowDetection
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24. Cylindrical – GEM for KLOE
inner tracker
FEE
G. Bencivenni, LNF
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R&D for AMADEUS setup
trigger system
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27. The AMADEUS trigger system
Cilindrical layer of scintillating fibers surrounding the beam pipe to trigger K+ K- in opposite directions
Readout to be done by SiPM
Inner tracker (eventually, a first tracking stage before the DC)
Target ( A gaseous He target for a first phase of study)
Trigger (1 or 2 layers of ScFi surrounding the interaction point)
target
Trigger system
ScFi + SiPM readout K+ K-
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28. Test of different SiPMs
Various SiPMs were tested at SMI:
Hamamatsu: 1mm2, 3 mm2
Photonique: 1 mm2
Dubna: 1 mm2, 3 mm2
Zecotek: 1 mm2, 3 mm2
Different characteristics :
Number of cells (linearity)
Fill factor
Q.E.
Noise, dark current

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SiPM gain (Vbias, T)
Hamamatsu 3 mm
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30. Trigger system: SiPM tests
SiPM (HAMAMATSU U50) (400 pixels)‏
Operating voltage ~70V
Dedicated fast pre-amplifiers design
Gain x20 – x100
Small size
For a good behavior stability in the applied voltage with great precision is needed for every single detector.
Electronics: New CAMAC modules providing:
Variable Vbias for 5 channels with a stability for
nominal voltages below 1 mV
2 output / channel:
-Amplified (x50-x100) signal
-Discriminated signal (variable threshold)
Designed by G. Corradi, D. Tagnani, C. Paglia
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31. Trigger system: ScFi + SiPM setup
Instrumented fibers:
Pol.Hi.Tech 46 (Blue )
Saint Gobain BCF- 10 single cladding:
Emission peak 432 nm
Decay time 2,7 ns
1/e 2.2 m
80000 ph./MeV
New mechanical support for
5 ScFi read from both sides
10 SiPM + readout card
Precission support for efficiencies studies
November, 2008
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32. Trigger system tests: installation at DAΦNE
Installation of AMADEUS trigger test setup in DAΦNE
22-24 January 2009
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Kaon peak around ch 1600
ADC channel
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R&D for AMADEUS setup
inner tracker
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35. Why GEM-based TPC detector for the inner tracker of AMADEUS
Time projection chamber (TPC) with its very light material budget has been successfully used as central tracker and particle identification device in a large number of experiments.
Gas Electron Multiplier (GEM) detector has great potential to improve TPC performances :
high rate-capability,
ion feedback reduction,
great robustness and long-term stability
 intense R&D activity on GEM- based TPC
however, the requirements for new high-rate particle experiments greatly exceed the abilities of traditional TPC read out by MWPC.
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36. AMADEUS requirements & challenges
almost full solid angle coverage around the interaction area  Two cylinders TPGs along the beam direction:
Inner & Outer radius =15 & 23 cm; Length = 15 cm
resolving complex pattern of multiple tracks
Hexagonal Pad of 2 or 3 mm radius (8 or 3.5 kch.)
good spatial resolution
 x-y ≤ 800 m & z ≤ 300 m
high momentum resolution of reconstructed trajectories
 p/p  1 % (with DC of KLOE)
minimal detector material (X0 <1 %) for low multiple scattering
 0.5% X0 total radiation length (2walls + gas)
high rate capability
 > 50 MHz/cm2 (*) measured
(*) M. Poli Lener, Ph.D Thesis, CERN-THESIS
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Prototype design
Cylindrical Field Cage
(drift length from 5 to 15 cm)
Anode Read-out
(hexagonal pads)
Drift electrode
3 framed GEM (10x10 cm2 active area )
G10 gas-tightness box components
Drawing by C. Capoccia
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Test beam BTF
FEE electronics
16 channels for each board
box cross section
BTF beam
Calorimiter
The TPG chamber has been constructed by F. Murtas in the framework of experiment IMAGEM – INFN – CSN5 for beam diagnostic purpose
Each FFE channel based on ADSQ chip
was sent to a multi-hit TDC in order to
record the leading edge (time hit) and
the width of each signal
The noise rate was <10 thr=200 mV
on the whole detector (64 pads)‏
The calorimeter signal was used to
discriminate the number of electrons
 beam
4 cm
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39. TPG Beam Test results
Drift velocity for the Ar/CO2/CF4 (45/15/40) gas mixture
has been measured in two different ways
Time (ns)‏
z position (cm)‏
Vd = (1.25 ± 0.03) cm/s
@ 300 V/cm, T=24°C, P= 993 mbar
Moving the detector in z
Velocity Drift (cm/s)‏
Drift Field (V/cm)‏
Garfield Simulation
Changing drift field
Experimental measurement
Drift velocity estimated by Garfield = (1.29 ± 0.01 ) cm/s @ 300 V/cm, T=24 °C, P= 993 mbar
The results agree with Garfield simulation
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Beam pipe - studies
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41. Study on possible solution for beam-pipe
(thanks to Giancarlo Sensolini and Sandro Tomassini)
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KLOE - AMADEUS
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43. Collaboration between AMADEUS and KLOE
Collaboration already started:
analysis of the KLOE data - O. Vazquez Doce
SLOW Control and DAQ -A. d’Uffizi
KLOE-2 electronics - D. Tagnani, M. Bazzi
KLONE - C. Curceanu, M. Iliescu, F. Sirghi
Agreement KLOE – AMADEUS signed February 2, 2009
it can and should be reinforced
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44. Agreement KLOE – AMADEUS
Agreement between Collaborations
for collaboration in the maintenance
and upgrade of the KLOE detector
between
the KLOE Collaboration
(Fabio Bossi, Spokesperson KLOE-2)
and
the AMADEUS Collaboration
(Catalina Curceanu, Co-chair, Johann Zmeskal, Co-chair)
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2 technical KLOE – AMADEUS meetings:
March 23, 2009
April 29, 2009
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There is a team from AMADEUS (about 10 persons from LNF, 3 from Vienna and 2 from Bucharest)
to start working with KLOE on the following items.
Responsible persons from AMADEUS are:
Trigger - Alessandro Scordo
Gas system - Marco Poli Lener
Drift Chamber - Oton Vazquez Doce
Calorimeter – Florin Sirghi
DAQ - Michael Cargnelli and Antonio Romero Vidal
Slow control - Alessandro d'Uffizi
Monitoring (root) - Shinji Okada
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AMADEUS
implementation plan
beam time
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48. Preparation, implementation plan and roll-in proposal
2009 and 2010: take part to KLOE maintenance, roll-in and
data taking (training)
AMADEUS R&D, construction, tests and assembly
the R&D for AMADEUS , construction, assembly and tests have to be finished within 2010
roll-in of AMADEUS
roll-in in 2011, compatible with KLOE end of step 0
AMADEUS DAQ
for an integrated luminosity of about 4 fb-1
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Beam time request for
AMADEUS Phase-1
• 2 fb-1 of integrated luminosity with He4 target in order to study the tri-baryon DBKNS
• 1-2 fb-1 of integrated luminosity with He3 target in order to study the di-baryon DBKNS
• 0.5 fb-1 of integrated luminosity for low-energy kaon-
nuclear dedicated measurements
→ an overall integrated luminosity of fb-1
With the luminosity upgrade of DANE, the machine could deliver at least 500 pb-1/month, which means that the overall AMADEUS Phase-1 programme could be completed in about 10 months (considering installation).
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50. International Workshop on
Hadronic Atoms and Kaonic Nuclei - solved puzzles, open problems and future challenges in theory and experiment
October 12-16, 2009
ECT*, Trento, Italy
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51. 38 LNF - Scientific Committee
Thank you
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