Target & Ion Source activities - Agenda (Indico) · 2010. 11. 23. · To dissipate the EM Power is...

SPES 2010 Workshop Alberto Andrighetto

Target & Ion Source activities

Alberto AndrighettoINFN – Laboratori di Legnaro


The target ion source complex

Full scale TIS complex with SiC discs

Target complex

Ion Source complex


Dump Target

1013 f/s -> a challenging goal

To dissipate the EM Power is necessary to study a new target set-up:

2) DUMP : send the proton with low fission rate & high stopping power value

1) MULTIPLE SLICES : increase the radiation surface area (P= ε·σ·S· T4 Stefan-Boltzmann law)

for a direct target ->

8 kW heat the target !

1013 fission per second

Goal for the 2nd

generation ISOL facilities


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 54Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe

55 56 57 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn

87 88 89 104 105 106 107 108 109 110 111 112Fr Ra Ac Rf Db Sg Bh Hs Mt

8

Elements with bad volatility (NOT EXTRACTED)

Surface Ionization Method

Laser beam

Laser with SIS

Photo Ionization Method

Plasma Ionization Method

IONIZATION methods for SPES n-rich RIB’s(3 methods, 2 Ion sources)

Main fission (p-> 238U) fragmentsPlasma Ion source


The SPES target: processes involved

Diffusion inthe target material

Ionization in the ionizer

Effusion in the enclosure

Acceleration in the electrode

Fission inthe target material

Heat DissipationAmong all devices

Material ChoiceRadiation hardness

Safe HandlingNo radioactive leaks

Good AlignmentsBeam transport

Technological aspects:

Cooling SystemGood water circuits

Scientific aspects:The SPES target is a optimization of:

Power dissipation – Short release – Easy handling…

CHANGELLING JOB!

A dedicated (& well organized!) R&D on:

Material science, Mechanical engineering, Laser technology, Handling is required!


The TIS SPES LaboratoriesHT LNL Lab Test Bench LNL Lab

Carbide Chemistry LNL Lab

UCx Chemistry PADOVA Lab

Laser PAVIA Lab


WP01: Mechanical Developments (M. Manzolaro - LNL)

WP04: Target Handling (M. Guerzoni - BO)

WP02: Material Developments (L. Biasetto - LNL)

WP03: Photoionization (P. Benetti PV; D. Scarpa - LNL)

SPES TIS Work PackagesMission: feasibility study of the target complex

WP05: Controls (J. Vasquez - LNL)


Overview on the WPactivities


WP01: The Mechanical R&D

3D

codification scheme

2D (mechanical drawing)

Modeling and codification for all devices


TIS heating process

ITarget= 700AILine= 200A

ILine= 200A

ITarget= 700A

With two independent current circuits


1000

1100

1200

1300

1400

1500

1600

1700

1800

1900

2000

600 700 800 900 1000 1100 1200 1300

heat

er te

mpe

ratu

re (

°C)

heater current (A)

FEMEXP

I =1300 AP = 9 kW Tin = 1850 °C

P = 9 kW !

On line test with 9kW imposed into the target -> successfully tested ! The SPES target chamber complex

Tout = 30 °C

Pyrometer FEM model


The final SPES SIS

350 A

Temperature in the ionizer

FE model validated experimentally


1) Elettro-termo-struttural of the (Isolde) and (Hribf) FEBIAD

2) Comparison focused toward the new SPES FEBIAD

4) Study of the magnetic field using FEM3) Validation of the FEM model

Developments on Plasma Ion Sorce Mechanical behavior test of the Febiad performed at LNL


WP02: Proton-rich beams for SPES-α

1H

2He

3Li

4Be

5B

6C

7N

8O

9F

10Ne

11Na

12Mg

13Al

14Si

15P

16S

17Cl

18Ar

19K

20Ca

21Sc

22Ti

23V

24Cr

25Mn

26Fe

27Co

28Ni

29Cu

30Zn

31Ga

32Ge

33As

34Se

35Br

36Kr

37Rb

38Sr

39Y

40Zr

41Nb

42Mo

43Tc

44Ru

45Rh

46Pd

47Ag

48Cd

49In

50Sn

51Sb

52Te

53I

54Xe

55Cs

56Ba

72Hf

73Ta

74W

75Re

76Os

77Ir

78Pt

79Au

80Hg

81Tl

82Pb

83Bi

84Po

85At

86Rn

87Fr

88Ra

57La

58Ce

59Pr

60Nd

61Pm

62Sm

63Eu

64Gd

65Te

66Dy

67Ho

68Er

69Tm

70Yb

71Lu

89Ac

90Th

91Pa

92U

93Np

94Pu

95Am

96Cm

97Bk

98Cf

99Es

100Fm

101Md

102No

103Lr

Alkaline - Alkaline earth metals

Halogens

Noble gases

Post-transition elements

Transition metals

Lanthanides


Boron carbide (B4C) productionNew Technique: Sol-gel synthesis -> boric acid B(OH)3 + citric acid C6H8O7

Solution of the acid Gel formation Dried gel Grounding and cold pressing

Thermal treated sample

Thermal treatment :• up to 800°C in low vacuum (5*10-2mbar), 0.5 °C/min• up to 1500°C in vacuum with Ar flow (5*10-1 mbar), 3°C/min• 2 hours at 1500°C

10 20 30 40 50 600

200

400

600

800

1000 C (75-2078) B4C (35-0798)

I (u.a.)

2θ (°)

B(OH)3 + CITRIC ACID 2.2:1 mol 1500°C 2h Vacuum+Ar

B4C formation

Further treatments:

Different boric acid/citric acid ratios

Different time/temperatures

Different pressures during treatment

- Use of binders


UCx 40mm. diameter pellet(full scale SPES disc!)

Before thermal treatment After thermal treatment


UCx using Carbon NanotubesProduction in progress at Padova UCx Laboratory

Shipment to ORNL before Christmas


On line UCx test at HRIBF

• Seven UC2 samples SPES Target Group (in collaboration with HRIBF)• Densities in the range of 4.2 g/cm3

• Yield measurements were made at the HRIBF using low intensity proton beams from the Tandem (40 MeV, 50 nA)

• Heated to 2000° C for about two weeks without any out-gassing or obvious change in structure (samples observed after the on-line test)

7 UCx pellets of 13 mm. diameter

Test performed on March ’10 (thanks to D. Stracener)


On line UCx test at HRIBFN-Rich Isotopes yields

Target discs status after (6 days) 40 MeV irradiation


Beam diagnosticdevices

WP03: Ionization measurements

Beam transport devices

Traget & Ion source (platform 30kV)

Front end running since June ‘10


Beam diagnostic set-up

Emittance Meter

Beam Profiler

Faraday Cup


Ionization test with RbFARADAY CUP BEAM INTENSITY

MEASUREMENT

ionization Rubidium

Up to 1,7 μ A in F.C

(Tionizer~ 1900 °C)

Rb εionization= 50 % (preliminary)

Tantalum oven tube with rubidium

(Mass Marker Capillarity Method)


SIS emittance of Rb

E rms = 2 π ·mm · mrad

@ 30 kV (preliminary)


PAVIA Laboratory setup

1 Pump Laser:• Quanta System G.Y.L 101/102

Nd:YAG laser

Impulse Energy up to 300mJ

Repetition rate max 10Hz

3 Tuneable Dye Laser :• Lambda Physik FL3002E and Lambda

Physik LPD3002E

Bandwidth 0,2 cm-1

Repetition rate according to pump

Goal:Build up a complete 3λ ionization scheme for metals

Since April 2010, 3 tuneable lasers are working properly


LPX200 XeCl excimer laser

Laser test at LNL with excimer

Laser beam

Pulse. 15 ns λ=308 nm

Al photo ionization

Phosphorescence of λ=308 nm

on Teflon

Front end alignment

Aluminum photoionization with a single wavelength


WP04: The target handling

Vertical device

Horizontal device

Two systems: in order to increase the handling security level


Front End Handling System


WP5: LNL Furnace Control System(Lab View based)

High Temperature Test Furnace

Thermal Treatment Furnace

Power Supplies

Vacuum System Control (PLC)

Power Supply Control (PC+LabView)

Characterization Test Furnace


Front End Control System

Vacuum System Control (PLC) Safety system Control (PLC)

Power Supplies

(Target System)

Power Supplies

(High Voltage System)

Data Acquisition Systems

High Voltage Platform

User Control Interface (EPICS+CSS)


Conclusions


What next…

-Test at ORNL using UCx SPES target with CNT

- Ionization of noble gases with FEBIAD at LNL

- Photoionization campaign of metals, with 3λ, at PV

- Photoionization of Al with excimer at LNL

- Target handling test at LNL

- New UCx laboratory at LNL …


SPES Target papers(About 20 contributions since 2005)


SPESTARGET

UNIPV UNIPD UNITN

DIM DSC DEI

DESIGN MATERIALS

DIMDSC

HANDLING

CONTROLS

Good news…

UNIVI

DMT

LASER

Since 2004: 32(!) thesis performed in the frame of target SPES activities

Collaboration with Universities Some recent choices from LNL…


The SPES TIS group

The target-ion source group (February ‘10)

Target & Ion Source activities - Agenda (Indico) · 2010. 11. 23. · To dissipate the EM Power is...

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