spes target group solid state laser system for the spes rib project (classic and novel approaches)...
TRANSCRIPT
SPES Target Group
Solid state laser systemfor the SPES RIB project
(classic and novel approaches)
Daniele ScarpaINFN-LNL
SPES Target Group
Overview
- Introduction
- The SPES layout & devices
- TIS R&D activities
-Laser R&D activities
- Final remarks.
SPES Target Group
SPES Infra-structures Phases
Artistic View of the facility
Level 0
Level -1
Phase b Beam Selection & Post Acceleration
Phase a Cyc & ISOL Facility
50 x 50 m2
Phase g d Applications Facility
25 x 50 m2
SPES Target Group
The SPES main devicesDriver:
‘Commercial’ cyclotronPost Accelerator:
Piave- Alpi existing complex
ALPI
PIAVE
Production Target:
NEW CONCEPT
(Multi-foil UCx target)
Target-Ion Source Complex:- optimized for 8kW beam power
- Eproton = 40 MeV for RIB
- 1013 fission/s.
RIB manipulation stage
- Mass Separator (WF)
- Beam Couler
- HRMS
- Charge Breeder
- RFQ
SPES Target Group
The TIS R&D activities
SPES Target Group
The TIS SPES LaboratoriesHT LNL Lab Test Bench LNL Lab
Carbide Chemistry LNL Lab
UCx Chemistry PADOVA Lab
Laser PAVIA Lab New ‘class A’ LNL Lab
SPES Target Group
The SPES off-line Front end
40 kV platform
SPES Target Group
Surface Ion source
1 2H He
3 4 5 6 7 9 10Li Be B C N O F Ne
11 12 13 14 15 16 17 18Na Mg Al Si P S Cl Ar
19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe55 56 57 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn87 88 89 104 105 106 107 108 109 110 111 112
Fr Ra Ac Rf Db Sg Bh Hs Mt
8
Not extracted
Surface Ionization Method
Laser beam
Laser with SIS
Photo Ionization Method
Plasma Ionization Method
RIB ionization methods:
Main fission (p-> 238U) fragmentsPlasma Ion source
Selective method
Very selective method
nonselective method
SPES Target Group
Target and Ion Sources
ionizing cavity
connector
plate
support
thermal screen
Hot cavity:- Optimized for Surface Ionization (Re inner surface)- Optimized for Laser Ionization (Ta, naked)
> The Surface Ion Source (SIS) adopted for the SPES facility
SPES Target Group
Target and Ion Sources> The Plasma Ion Source (PIS) adopted for the SPES facility
Starting configurationHybrid MK5 (CERN) – EBPIS (ORNL)
SPES Target Group
1) Commissioning
2015: Delivery of infrastructure2015-2016 Commissioning of subsystem
2) Operational-> 2017 : 40 MeV Cyclotron
- 2017 I = 5 μA, UCx (13 mm) ; (SIS) : Rb e Cs- 2018 I= 50 μ A, SiC (40 mm full scale); (PIS-LIS): Al- 2019 I= 150 μ A, UCx (40 mm full scale); (LIS): Sn
SPES ROAD MAP
SPES Target Group
Aluminum laser ionizationTwo step, one color ionization path: Al [308.216;308.216 e−] Al+
λ
λ
First step:Resonant λ =308,216 nm
Second step:Non – resonanttowards continuum same wavelengthλ =308,216 nm
Typical transition linewidth
Pavia Dye Laser Laboratory
SPES Target Group
2010: Neodimium laser ionizationThree step, two color ionization path:
Pavia Dye Laser Laboratory
5900 A
5970 A
5888 Afast signal (first wavelength fixed @ 588,806 nm)
SPES Target Group
For off-line facilities or where typical laser system – hot cavity distance is ≈ 1-5 m
a possible solution: Fiber optics
Optical fiber 3 in 1:optimal spatial overlapEasy final alignmentUp to 1mJ in each 200um. fiber (pulse 15 ns.)Bad final beam collimation (but ok for short distance)
Each laser enters in 200 um core fiber
SMA-SMA connection:3 x 200 um into 1 x 600 um
+
2012: Combination of laser beam
WP03
Pavia Dye Laser Laboratory
SPES Target Group
LPX200 XeCl excimer laser
Laser test at LNL with excimerAluminum ionization with a single wavelength
Laser beam
Pulse. 15 ns λ=308 nm
Al photo ionization
The laser beam shape is focalized into hot cavityof 3 mm. diameter and 6 m. far away
Hot Cavity Laser beam(phosphorescence on plastic dump)
Need of NEW TUNABLE
Solid State Laser System
for other e
lements
Laser Ioniza
tion!!!
SPES Target Group
Beam for SPESAccording with the letters of intent
So far, 24 LoI’s received for reaccelerated RIB
SPES Target Group
1) Commissioning
2015: Delivery of infrastructure2015-2016 Commissioning of subsystem
2) Operational-> 2017 : 40 MeV Cyclotron
- 2017 I = 5 μA, UCx (13 mm) ; (SIS) : Rb e Cs- 2018 I= 50 μ A, SiC (40 mm full scale); (PIS-LIS): Al- 2019 I= 150 μ A, UCx (40 mm full scale); (LIS): Sn
SPES ROAD MAP
SPES Target Group
Tin in other facilities
λ E(banco)[uJ] E(target)[uJ] λ E(banco)[uJ] E(target)[uJ] λ E(banco)[uJ] E(target)[uJ]E0 300,9 21 4,5 286,42 1 0 254,7 0 0
E1 811,4 85 15 811,62 150 0 454,9 0 0
E2 823,5 250 50 823,67 150 0 0 0 0
T TargetFripDistanzaΦ Target 3 mm 3 mm
10 kHz 10 kHz 200 Hz15 m 7 m
CERN OAK-RIDGE Leuven
2300 °C 1700 °C 2000 °C
Power and wavelength considerations:
Contaminants considerations:Hot cavity high temperatures provides high rates of contaminants at first mass separator for 132Sn due to 132Cs. => Lower temperature for hot cavity => Engineering hot cavity materials (work functions) => Higher laser repetition rate
Doubling rep rate(@ same pulse energy)
Doublingion current
Doublingefficiency
SPES Target Group
Target and Ion Sources> New Laser Ion Source Developments
Laser ionization system requirements:Reference element: for Tin
Possible requirements: Bandwith:Base: 5 GHz (< 0,2 cm-1) ;Narrow: 1 GHz (< 0,04 cm-1)Energy per Pulse:> 50 uJ (UV < 300 nm) ;> 500uJ (fund)Pulse duration:20 < t < 30 nsFreq Rip:20 kHz
SPES Target Group
Target and Ion Sources> New Laser Ion Source Developments
Possible requirements: Bandwith:Base: 5 GHz (< 0,2 cm-1) ;Narrow: 1 GHz (< 0,04 cm-1)Energy per Pulse:> 50 uJ (UV < 300 nm) ;> 500uJ (fund)Pulse duration:20 < t < 30 nsFreq Rip:20 kHz
Laser ionization system requirements:Reference element: Al
SPES Target Group
Company custom proposal for SPES TiSa laser system
Ti:Sa tunable laser. Proposed specification.Repetition rate: 20 kHzWavelength: 690 – 950 nmOutput energy: 0.5 mJPulse duration: 15 nsPulse jitter: <1 nsLinewidth: 5-10 GHzNarrow line option: 1 GHz
Master Oscillator + Power Amplifier (MOPA)
SPES Target Group
Company alternative proposal for SPES laser system Master Oscillator + Power Amplifier (MOPA)
OPG Power AmplifierIn all cases where shorter pulses are accepted, (range < 1 nsec), the OPG concept may represent a valid practical approach: spectral properties are defined by the narrow band low power seeder and the beam quality is reasonably preserved by the OPG stage.
SPES Target Group
Conclusion
SPES Target Group
Letter of Intents: under discussion to select first-day-exp.
ISOL Target and Ion Source: working in off-line laboratory.
Layout for pre-acceleration: defined.
Authorizations ready for cyclotron operation.
Contract for cyclotron: signed November ‘10, final design accepted (June ’11), cyclotron under machining.
Building project: ready, financed (June ‘12), bid on the way.
Phase β and γ partially financed (July ‘12)
Starting of Laser System R&D
Expected ground breaking March 2013.
Current status and overview
SPES Target Group
Meanwhile…..New off-line laser lab in LNL under construction..
SPES
Labo
rato
ry ar
ea
New Laser (o
ff-line) La
b
SPES Target Group
New off-line laser lab in LNL under construction..
Estimated end of works: March ‘13
Meanwhile…..
SPES Target Group
Laser R&D at LNL
- Beginning 2013:- Build of a new off-line solid state laser lab in LNL
- 2013 – 2017:- Measure and tests with solid state solutions at 20
kHz rep rate
- 2017:- First SPES beam laser ionization on-line
SPES Target Group
Thank you!
(Waiting for answers…)
SPES Target Group
1 Pump Laser:• Quanta System G.Y.L 101/102
Nd:YAG laser
Impulse Energy up to 300mJ
Repetition rate max 10Hz
Complete laser photoionization system structure
3 Tuneable Dye Laser :• Lambda Physik FL3002E and Lambda
Physik LPD3002E
Bandwidth 0,2 cm-1
Repetition rate according to pump
complete 3λ ionization scheme
Since April 2010: the 3 tuneable laser are ON
Pavia Laser Laboratory Setup
SPES Target Group
Target and Ion Sources> Possible Italian partner for laser system developments
Bright Solutions S.r.l was founded in 1998 by group of laser scientists and industry experts withsignificant experience in diode-pumped solid state laser engineering.From the origin the Company’s activity was oriented towards the development of the state-of-the-art DPSS laser sources with a goals of superior efficiency, compactness and reliability.
SPES Target Group
Possible portfolio baseline for SPES laser projectCompany custom products brief history
2010 Widely Tunable Ti:Sa750-900 nm10 kHz ; 10 ns0.5 – 1 WApplication: In Vivo Medical Diagnostics (University of Arkansasfor Medical Sciences).
2010 CZMIL US Program(Coastal Zone Mapping and Imaging Lidar)Development of a custom laser source with 6mJ pulse energy in 2ns (3 MW) at 10 kHz.Two collinear laser beams, 35W at 532nm and 25W at 1064nm, are provided at laser output. The beam at 532nm detects the sea bottom, radiation at 1064nm detects the sea surface.
Several rugged units have been delivered, accumulating hundreds of flight hours each.