1. A case study in nuclear physics: instrumentation for the
Super Separator Spectrometer
S3 Collaboration (LoI signed by 28 laboratoires)
 ANL (US), CENBG, CSNSM, JINR-FLNR, (Russia), GANIL, France, GSI (Germany), INFN Legnaro, (Italy), IPHC, France, IPNL, , Irfu CEA Saclay, IPNO, France, JYFL (Finland), K.U. Leuven (Belgium), Liverpool-U, (UK), LNS (Italy), LPSC, MSU (US), LMU, (Germany), Nanjing-U (China), Northern Illinois University (US), SAS Bratislava, (Slovaquia), Smoluchowski Institute (Poland), CEA-DAM; SUBATECH, TAMU (US), U. Mainz (Germany), York-U (UK), Vinca Institute (Serbia)

2. S3 separator-spectrometer
GANIL/SPIRAL1/SPIRAL2 facility
GANIL/SPIRAL 1 today
DESIR Facility
low energy RIB
S3 separator-spectrometer
LINAC: 33MeV p, 40 MeV d, 14.5 A MeV HI
A/q=3 HI source
Up to 1mA
Neutrons For Science
A/q=2 source
p, d, 3,4He 5mA

3. Physics objectives Nuclei produced by Fusion-Evaporation
Atomic Phyics
FISIC project
LoI_Day1_1
Nuclei produced by
Fusion-Evaporation
Proton Dripline & N=Z nuclei
Tests of Shell Model
Single-Particle structure
 Development of Collectivity
Shape coexistence
Ground-State Properties
Standard Model
Heavy and Superheavy
Elements
 Synthesis
Spectroscopy and Structure
 Ground-State Properties
Neutron-Rich Nuclei
 Single-Particle structure
 Quenching of Shell Gaps
 13 LoIs submitted
LoIs signed by 170 physicists
Requested beam time : 380 days !!!

4. S3 Baseline Mass spectrometer Momentum achromat Achromatic point
Principle : Two-stage selection (Bρ & m/q) that will achieve very good rejection
of both the beam and adjacent mass channels of reaction products
High power
Rotating targets
including actinides
Large acceptance
Multipoles
Opened and closed
External Beam dump
& Movable fingers
Get rid of >99,9% of the beam
Beam
Mass spectrometer
Momentum achromat
Multi-purpose
Experimental
Room
Achromatic point
Electric dipole
Magnetic dipole
Implantation-decay station
At the mass dispersive
plane
Low
Energy
Branch
DESIR

5. The Recoil Decay Tagging Technique
(E, t)
Tracking Detectors
(x,y,t)
Separator-Spectrometer
Heavy ion
(E, t, x,y)
Beam
Target
α, e-, γ
(E, t, x,y)
Coincidence
 Prompt Spectroscopy
Genetic Correlation
 Decay spectroscopy

6. Implantation-decay spectroscopy station
CSNSM, IPHC, Irfu, GANIL
TOF: Emissive foil detectors
Large size (200x100mm2)
Very low thickness
Time resolution < 1ns
Si Tunnel
Large size (60x100mm2)
Conversion electrons FWHM < 5 keV
And escaped alpha FWHM < 15 keV
Gamma detection
First Step  use of EXOGAM(2)
Implantation
Large size detectors (100x100mm2, channels)
High resolution : 20 8 MeV (FWHM)
Implantation decay sequence :
Ability to detect large (> 50MeV) pulse quickly
(≈ 10µs) followed by a weak (<15MeV) pulse.
No dead time to detect short lived decay chains.
Front-end electronic
(large & high resolution PA)
Back-end electronic & DAQ
(triggerless, digital processing)
R&D phase until mid 2012
Comparison & tests of existing solution and R&D possibilities (Discrete or ASIC solution)

7. GET for Tracking Detectors
201x138 mm2
68+47 strips
+2 time signals
From F. Druillole, CEA Saclay for the GET collaboration

8. Implantation-decay spectroscopy station
CSNSM, IPHC, Irfu, GANIL
TOF: Emissive foil detectors
Large size (200x100mm2)
Very low thickness
Time resolution < 1ns
Si Tunnel
Large size (60x100mm2)
Conversion electrons FWHM < 5 keV
And escaped alpha FWHM < 15 keV
Gamma detection
First Step  use of EXOGAM(2)
Implantation
Large size detectors (100x100mm2, channels)
High resolution : 20 8 MeV (FWHM)
Implantation decay sequence :
Ability to detect large (> 50MeV) pulse quickly
(≈ 10µs) followed by a weak (<15MeV) pulse.
No dead time to detect short lived decay chains.
Front-end electronic
(large & high resolution PA)
Back-end electronic & DAQ
(triggerless, digital processing)

9. FEE Option : Bigain Pole Zero
Classic bigain solution
BiPZ
Pole Zero is forced to high frequency:
 TPZ replaces RfCf and is higher (x10)
Pile-up of small signal on low signal
 minimize RfCf
BUT : Cf constrained by dynamics (>4pF)
Rf limited by noise >~1 MΩ
 RfCf >4μs too long for 10µs decays
5MeV pulse 10µs after 200MeV
simulations show 5-8keV resolution
linar pulses
✖ requires 2 ADC channels
From E. Delagnes, CEA Saclay

10. FEE Option: Floating point charge amp.
Principe of the double gain CSA
High gain ~ 100keV to 15MeV (15keV FWHM)
Low gain ~ 10MeV to 500MeV (1% FWHM)
44.4 mV/MeV (Cf=1pF)
Requires 1 ADC channel
Reasonable noise (7.2keV/23keV) and INL
ASIC technology
digital processing of LG
2.1 mV/MeV (Cf=21pF)
From Ph. Vallerand, Ganil, (see Talk at ANSiP 2011) in collaboration with CEA Saclay

11. FEE Option: digital Feed back preamplifier
Requires 1 ADC channel
Digital processing required (NL)
Requires 1 DAC / channel
150MeV followed by 5MeV after 25µs
5µs/div
500ns/div
From N. Karkour (CSNSM Orsay) in collaboration with Ganil

12. BEE Option: 16 ch. [ADC+DAC] modules
Compatibility with Digital feedback for compensated Preamplifier
SAMPLING CLOCK
ANALOG CORRECTION OUTPUT
FPGA
(AMC)
SRAM
MEMORY
DAC
ANALOG INPUT
ADC
FIXED GAIN AMPLIFIER
DAUGHTER BOARD
N CHANNELS
V1724
Based on CAEN V1724
 Existing mother board, FPGA and SRAM
16ADC (14bits, 100MHz) + 16DAC per module
Requires VHDL programming
Compatible with GTS
Ganil Electronics and Run control to be implemented
Option : 32 ADC channel module
From N. Karkour (CSNSM Orsay)

13. BEE Option: 8 ch. NUMEXO2 modules
Developed by Ganil
specific data processing requested
Hardware modifications depends on FEE
ADC Logic -
FADC samples collection
Digital Processing
Trigger
Data formatting
Inspection control
PPC
Common Logic
GTS
Fanin
ADC Logic Interface
Clocks
(Local &
Recovered)
Delay
Line
Optical
Link
Flash
(Linux)
PROM
(VHDL)
Ethernet
Gigabit
PCIe
(4 Lane)
DACs
(Test, control,
inspection)
Serial
link
DDR2
Mux
2*FADC 2 ch
14 bits
200MHz
FIFO
RAW DATA
(event parameters)
Samples
Digital processing
adaptation
4 x
Compatible with Floating Point ASIC preamplifier
Fully integrated to Ganil Acquisiton and control system, GTS compatible

14. Conclusions Implantation decay station developed for S3
GET electronics for tracking detectors
Studies for Implantation detector
Issue : high implantation followed by small decay signals
FEE Options
BiGain Pole Zero discrete preamplifier
Floating point ASIC preamplifier
Digital Feedback Compensated Preamplifier
BEE Options
16ACD+16DAC for DFCPa (based on CAEN V1724)
8 channels NUMEXO2 digitizers
(Very comparable technical performances)
Comparison under way (mid 2012)
Goal : ready for 2015