1. Status and perspectives of the LNS-FRIBS facility1
19/05/ :40
Status and perspectives of the LNS-FRIBS facility
P. Russotto, INFN-LNS, Catania, Italy
and
NewCHIM collaborations
5/19/2019 1:40 PM

2. Fragmentation beams at INFN-LNS - Catania
19/05/ :40
Reaction target and fragments detection
Two 45° dipoles of the beam line for the fragments selection
Movable production Target water cooled
G. Cardella at 2015

3. Tagging system: layout of the CHIMERA case
DSSSD ~ 140 μm
(32x32 pixels of 2*2 mm2)
Micro Channel Plate as start detector Δt~200 ps
Position sensitive PPAC or DSSSD to measure/test trajectory
G. Cardella at 2015

4. Tagging system: particle identification
strip
MCP
MeV ns
Same time = same v
Br=mv/q  same m/q
or for fully stripped ions
Same m/Z
m/Z=3
18O(55 AMeV) + 9Be(1500 um)
Br=2.78Tm
m/Z=2.66
16C
8Li
6He
9Li
12Be
15B
18C
Beams produced available at
Smaller time
larger v  smaller m
G. Cardella at 2015

5. Beam diagnostics
There are 13 diagnostic points to optimize the transport of the beam.
Real time beam imaging based on fast acquisition system
Spatial resolution 1-2 mm
Plastic scintillator (BC408) optically coupled to a small PMT, working in pulse counting mode (good below 105 pps)
G. Cosentino & E.V. Pagano at 2015

6. G. Cardella (IWM-EC 2016) & N.S. Martorana (SiF 2016)
LNS
G. Cardella (IWM-EC 2016) & N.S. Martorana (SiF 2016)
68Ni
67Ni
65Co
68Cu
69Cu
71Zn
Obtained statistics:
2 ·10 9 events of 68Ni
6 ·10 9 total events
70Zn(40 AMeV) + 9Be
In the previous proposal we required:
30 BTU ( 10 days) of beam in order to study the PDR on 68Ni
70Zn @ 40 MeV/nucleon with a power of 100 W ( 20 KHz of 68Ni)beam intensity of 700 nA
6 BTU for the calibration  p+12C and Kr beam
68Ni
67Ni
Good identification also thanks to the cleaning effect of the fragment separator
We actually obtained ( 25/11/ /12/2015):
Just 400 nA of 70Zn
Problems to maintain the source for a long period ( problems with the transport and the transmission of the beam) we actually had 15 BTU of 70Zn despite the renouncement of the Kr beam
Proton calibration √
FARCOS detects and identify 68Ni with good energy resolution (stopped in the two silicon stages of the telescopes)
G.Cardella IWMEC 2016

7. New exp CLIR in JUNE 2015: CHIMERA+FARCOS
Clustering phenomena in exotic nuclei: structure
MeV ns
New exp CLIR in JUNE 2015: CHIMERA+FARCOS
D. Dell’Aquila et al., PRC (2016)

8. The GREEN Experiment: Measure of the ISGMR in the 38S exotic nucleus
Primary 40Ar 35 AMeV (100 W) on a 9Be production target 500 μm thick
How…
Deuteron inelastic scattering in inverse kinematics
CD2 target
1 mg/cm2 thick
Beam
21 AMeV
38S excitation energy spectrum and angular distributions
The recoiling deuteron is measured at small angles around 0° in MAGNEX
Complete reconstruction of the deuteron momentum vector

9. Actual LNS Layout The proposed new FRIBs area con and pro: PRO
It is outside from the accelerators room/vault;
It is easier to shield this area;
It is a completely new beam line (the pro is that the performance are optimized by the new design);
The construction is quite independent by the usual activity of cyclotron;
CON
We lose 2 experimental tandem area, but may be 0ne will be recovered.
The cost;
MAGNEX
CHIMERA
CICLOPE
A.D. Russo at SIF 2016

10. The FRIBs layout towards CHIMERA & MAGNEX
The FRIBs layout to deliver radioactive beam to MAGNEX and CHIMERA rooms
Output Slit
The new FRIBs solution
consists in:
Degrader
2 - triplets
2 – doublets
Bore ø 140 mm
2 - 70° dipoles
2 - 40° dipole
R=2000 mm
H=±200 mm
V=±35 mm
Target where fragmentation occurs
A.D. Russo at SIF 2016

11. The FRIBs layout towards CICLOPE & SOLE
The FRIBs layout to deliver radioactive Ion beam to CICLOPE area and SOLE spectrometer
The line at the beginning is
the same then previous;
To build this line it is necessary to add
Output Slit
2 – triplets
1 – doublet
Bore ø 140 mm
Degrader
R=2000 mm
H=±200 mm
V=±35 mm
1 - 45° dipole
It is necessary to add a -5° exit to the first 40° dipole
Target where fragmentation occurs
A.D. Russo at SIF 2016

12. A case study: 14Be production
@55 AMev
Pbeam= 2kW
Projectile beam:
𝟏𝟖 𝑶 𝟖+
Target:
𝟗𝑩𝒆
1500 μm
Fragment required
𝟏𝟒 𝑩𝒆 𝟒+
Output slit
New and actual systems 100 W
With and without slit 2 kW
3.88E E+03
Out particle [pps]
factor
Actual
5.68E+01 W
1.94E+02 ≅4 kW
3.88E+03
≅80
A.D. Russo at SIF 2016

13. Other issues:
Beam tagging: see C. Nociforo talk at 2015
Beam diagnostics: see E.V. Pagano talk at 2015