I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007 Collaboration: University of Huelva, Spain...
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Transcript of I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007 Collaboration: University of Huelva, Spain...
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
Collaboration:University of Huelva, Spain (coordinator)
GSI-Darmstadt, Germany.University of Sevilla, Spain.CSIC-IEM Madrid, Spain.IKS-University of Leuven, Belgium.CRC Louvain la Neuve, Belgium.University of Surrey, UKFlerov Lab. Nuclear Studies, Dubna, RussiaA. Soltan Institute for Nuclear Studies, Warsaw, Poland.H. Niewodniczandki Institute of Nuclear Physics, Krakow, Poland.
The HYDE array
for the LOW ENERGY BRANCH of FAIR
I. Martel *
for the HYDE collaboration
* Department of Applied Physics, The University of Huelva, Spain
Huelva
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
At present RIB facilities we can customize our nuclear system (N,Z):
Terra incognita huge gene pool of nuclei !!
Fabricate “any”nucleus controlling the number of constituent protons and neutrons
OUR NUCLEAR WORKBENCH!
isolate and amplify specific physics or interactions
The development of Radioactive Beam Facilities (RIB) has opened new The development of Radioactive Beam Facilities (RIB) has opened new frontiers of research for nuclear physicsfrontiers of research for nuclear physics
Evolution of structure within these boundaries
1. Proton Rich Nuclei
2. Neutron Rich Nuclei
3. Heaviest Nuclei
Frontiers
Basic Idea: Study of the Structure and Dynamics of VERY Exotic Nuclei
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
Experimental quantities cross sections & relative yields: Elastic, Inelastic, Transfer, Breakup,...
Spectroscopic tools Particle Detectors + Direct Nuclear Reactions - not too many degrees of freedom - precise knowledge of theoretical framework (CC) - well tested with stable nuclei
Exotic (N,Z) combinations isospin degree of freedom- Evolution of shell structure phase shape transitions, - Halo nuclei- Cluster structures- Beyond the drip lines unbound nuclei & resonances- Reaction mechanisms and dynamics of exotic systems
19C Heaviest Halo Nucleus
[T + εi – E + <ψi(r)IV(r,R)Iψi(r)>] χi(R) = <ψi(r)IV(r,R)Iψk(r)> χk(R)
Φ(r,R) = ψ1(r)χ1(R) + ψ2(r)χ2(R) + …..
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
TOF vs E A
DE vs E A & Z
Experimental Methods
. vs E Kinematics/ Reaction channel
n-γ discrimination+ TOF RADIOACTIVE
BEAMCharged particles
SILICONARRAY
Neutrons
target
NEUTRONARRAY
Tracking devices
GAMMA ARRAY
AGATA
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
Reactions with drip-line nuclei using the HYbrid DEtector array (HYDE)
Motivation: Study of Direct Nuclear Reactions induced by drip line nuclei with half lifes around/below the MILISECOND the most difficult ones?
HYDE physics complementary with other existing projects:
The Low-Energy Branch at FAIR an unique facility!!
Spectroscopic information: B(Eλ) values, quadrupole deformations, clustering, coupling to the continuum,…Collective phenomena and nucleon-nucleon correlations
“Low energies” radioactive beams from 5 up to 30 MeV/u
What to measure?: angular distributions: elastic and inelastic scattering, break-up, transfer reactions,…
FAZIA & GASPARD (GANIL/SPIRAL2) half life down to 10ms
EXL (FAIR) half life down to s
HYDE(FAIR/LEB) half life down/below to ms drip line!!
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
Low Energy Branch
FAIR – Facility for Antiproton and Ion Research
UNIVERSITY OF HUELVA
Duty Coordinate the construction of the HYDE array for charged particles
FINURA: FPA2006
600m
m
600mm
FAIR/HYDE2006-2012
SPIRAL2: FAZIASYNERGY!
SPIRAL2: GASPARDSYNERGY!
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
-Preliminary concept design/DSSSD based….- This design will change...
600mm
600m
m
600mm 300mm?
300m
m
300mm
AGATA CHAMBER
Target
HYDE//MECHANICS/
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
SOME PRELIMINARY IDEAS…
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
RIB intensities after Super-FRS
“VERY” HEAVY IONS (mass > S, Cl) INVERSE KINEMATICS
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
Courtesy of C. Scheidenberger
E = 3 MeV/u
FAIR/NUSTAR/Low-Energy Branch: energy and angular spread
Typical figures:
300 MeV/u: E ~ 0.3 MeV/u ~ 5 mrad 5 MeV/u: E ~ 3 MeV/u ~ 200 mrad spot ~ 3cm !!
Remarks:1. FAIRBeam tracking system:
Accurate position + energy
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
Tracking Conceptual Design
Target
Tracking detectors
HYDE Telescope:DSSD+DE+E
TOF
BA
C
150 mm
150 mm2000 mm
Reaction chamber
Choice of tracking detectors:
Diamond (GSI)
SeD (Saclay)
SeD tracking detectors (VAMOS)//GANIL
UNIVERSITY OF SEVILLA
Ivan Mukha
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
Physics at 3-30 MeV/u- Direct Nuclear Reactions, Clustering, Fusion Evaporation, Transfer, Deep Inelastic, etc.
The HYbrid DEtector concept (HYDE)
HYDE
Goals: - Charged particles.- Good charge and mass identification.- Efficiency (>60%).- Good energy resolution (<150 keV).- Angular resolution (<1º).
Beam properties: - Large emitance - Low intensity <107 pps.
Constraints:- use with other detectors (Neutron array, Calorimeter, AGATA, etc
- use at other RIB facilities (SPIRAL2, ISOLDE, LEGNARO,…)
- Modularity and portability
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
-6,0x10-7-4,0x10-7-2,0x10-7 0,0 2,0x10-7 4,0x10-7 6,0x10-7-4,0x10-3
-3,5x10-3
-3,0x10-3
-2,5x10-3
-2,0x10-3
-1,5x10-3
-1,0x10-3
-5,0x10-4
0,0
5,0x10-4
volts
seconds
6Li at 7 MeV
Target holderLinear/rotary
6 way crossISO200
FlexibleISO 100Turbo
Pump
4 way crossISO250/ISO100
Lemofeedtroughs
Ion beam
View portScintillator
120 cm
Target holderLinear/rotary
6 way crossISO200
FlexibleISO 100Turbo
Pump
4 way crossISO250/ISO100
Lemofeedtroughs
Ion beam
View portScintillator
120 cm
R&D ON PSA LOW ENERGY PS DATA BASE
CNA-Tandem (Sevilla): 4He & 6,7Li, 1 MeV stepIn collaboration with FAZIA
FEBRUARY 5-9/ 2007
0,5 1,0 1,5 2,0 2,5 3,015
20
25
30
35
40
45
50
55
60
65
Ris
e T
ime
(ns)
Energy
6Li
7 MeV 9 MeV 12 MeV
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
E1 E2 EHYDE TELESCOPE DEMONSTRATOR (2010):(PROPOSAL FOR OCTOBER MEETING @ Huelva)
- 3 stage device - Thin Silicon (50um) + Thick Silicon (>1 mm) + Scintillator (5 cm) - MULTI-STRIP philosophy
4 DETECTOR UNITS:
1 Double Sided Sided Strip detector + PAD Si + Scintillator :
- E1+XY(50um) + E2(> 1mm) + E3-CsI(Tl)-5cm- 10 mm x 10 mm total active area- 3 x 3 strips each side 3mm strip pitch TOTAL 9 x 4 = 36 pixels
Combine Particle identification techniques:
- ToF modular system- DE/Et thin DE- Kinematics angular resolution- Pulse Shape Analysis Fast FEE + Neural Network Algorithms
FAZIA- PSA studies
L. B
ard
elli e
t al., N
PA
74
6(2
00
4)2
72
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
Fully Digital Electronics system
1. Compactness integrated system2. Vacuum proof (preamp + digitizers!)3. Digital energy, pulse shape (and timing?): current, charge, energy, time4. Variable dynamic ranges5. FPGA’s + DSP’s for PSA and control
6 Slow control & monitoring (gains, thresholds, temperature, bias,… -> OPTIMIZATION7. Calibration procedures (E, Time, …)8. Portability/Modularity9. Low cost
Si Si CsI (Tl)
SLOW digitizer125 MHz
12 bit, Q(t)
FAST digitizer2 GHz
12 bit, I (t)
DSP/FPGA
Energy
I dentity
Low RatePulse Shape
Time
Trigger out
Synchronization
Monitoring
Slow control
PreampI (t), Q(t)
VACUUM
Si Si CsI (Tl)
SLOW digitizer125 MHz
12 bit, Q(t)
FAST digitizer2 GHz
12 bit, I (t)
DSP/FPGA
Energy
I dentity
Low RatePulse Shape
Time
Trigger out
Synchronization
Monitoring
Slow control
PreampI (t), Q(t)
Si Si CsI (Tl)Si Si CsI (Tl)
SLOW digitizer125 MHz
12 bit, Q(t)
FAST digitizer2 GHz
12 bit, I (t)
DSP/FPGA
Energy
I dentity
Low RatePulse Shape
Time
Trigger out
Synchronization
Monitoring
Slow control
PreampI (t), Q(t)
VACUUMVACUUM
CO
MPU
TER
& S
TO
RA
GE
HYDE FEE DEMONSTRATOR (2010)(PROPOSAL FOR OCTOBER MEETING @ HUELVA!!)
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
Sampling N° of bits: 12Sampling rate: 2 GHz, BW > 300 MHz Over what duration? 250 ns
Control & Command Temperature, current, voltageGain, thresholds Calibration requirements: E, Time
Energy Dynamic range: 300 KeV 1 GeV Energy resolution: < 150 KeV
Detector HYbrid: Silicon + Scincillator
Rise time and fall time ~ 10 ns-250 nsRecoil Decay Tagging? NOEnvironment: vacuum
Time Range: 1ns, Resolution: 10% (100 ps) Time stamping
Power constrain : For Vacuum ~ mW/channel
Trigger: Depends on experiment
Geometrical & constrains Volume of instrument: Ø 500 mm Pre-amp, Cabling, FEE card N° of channels/detector: 32 (E+T+PSA info)N° of detectors: 150
Data Filtering Pulse-shape to Z & A up to S/Cl isotopesFPGA+DPS board in air
PREAMP:Bandwidth: 0.003 - 2 GHz, Gain > 40 dBLow Noise (<3 dB), Output: Q(t), I(t), dT (analog)
Rate per channel (typical) 100HzGlobal rate: 1 MHz (x PSA info)
I. MARTEL SGFDC MEETING @ UNIVERSITY OF HUELVA JULY 2007
FIN