TURKISH ACCELERATOR CENTER (TAC) PROJECT€¦ · zStarting from 2002, the conceptual design study...
Transcript of TURKISH ACCELERATOR CENTER (TAC) PROJECT€¦ · zStarting from 2002, the conceptual design study...
TURKISH ACCELERATOR CENTER (TAC) PROJECT
http://bilge.science.ankara.edu.tr
Yeşim CengerAnkara University
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Contents
Introduction
Turkish Accelerator Center (TAC) Proposal
TAC IR FEL Test Facility
Conclusion
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Introduction
Accelerator technology a generic technology locomotive of the development in almost all
fields of science and technology. Accelerator technology should become widespread all over the world.Existing situation: a large portion of the world(the South and Mid-East) is poor on the accelerator technology.
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Global View of Accelerator Technology
CEAOrsay
KEK
LANL
INFN LegnaroINFN Genoa INFN Milan
TU Darmstadt
PekingUniversity
AustralianNational
University
JLab High Gradient
JLab
CERN
ANL
FNAL
CEA Saclay
DESY/TESLACESR
Center for AdvancedTechnology, Indore
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Projects in Middle East
SESAME in Jordan (by UNESCO)CANDLE in Armenia
Turkish Accelerator Complex• light sources • particle physics experiments • proton and secondary beam applications
} SR
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Short chronology of the TAC project
Approximately 10 years ago, linac-ring type charm-tau factory with synchrotron light source was proposed as a regional project for elementary particle physics.
• S. Sultansoy, Turk. J. Phys. 17 (1993) 591; Turk. J. Phys. 19 (1995) 785.
Starting from 1997, a small group from Ankara and Gazi Universities begins a feasibility study for the possible accelerator complex in Turkey with the support of Turkish State Planning Organization (DPT).
• http://bilge.science.ankara.edu.tr
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The results of the study are published inA. K. Çiftçi et al., Turk. J. Phys. 24 (2000) 747
and presented at EPACsÖ. Yavaş, A. K. Çiftçi, S. Sultansoy, EPAC 2000, p. 1008.A. K. Çiftçi et al., EPAC 2002, p. 1100.
Ö. Yavaş et al, EPAC 2006
Starting from 2002, the conceptual design study of the TAC project has started with a relatively enlarged group (again with the DPT support). This stage is completed in 2005. The results are published in
S. Sultansoy et al., PAC 2005
Short chronology of the TAC project (cont.)
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Present Status:TAC Project supported by Turkish State Planning Organization (DPT) Grant No: DPT2006K-120470 Period of : 2006-2010
10 Turkish universities:Ankara Univ. (Coordinator) + Boğaziçi, Doğuş,Dumlupınar, Erciyes, Gazi,İstanbul, Niğde, S. Demirel, Uludağ Universities
30 staff + 50 graduate students
Main Goals of the TAC Project:To establish Institute of Accelerator Technologies To prepare TDR of TACTo construct TAC Infrared FEL
Short chronology of the TAC project(cont.)
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TAC Project includes
TAC-Test Facility (IR-FEL) Free electron laser based on electron linac• TAC IR FEL Test Facility
Synchrotron light source based on positron ring(*3rd generation)GeV scale proton acceleratorLinac-ring type charm factory ( )1234 scm10L −−=
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TURKISH ACCELERATOR COMPLEX (TAC) PROJECT
After the feasibility and the conceptual design studies it was decided to construct a charm factory which also will serve to obtain free electron laser and synchrotron radiation.TAC facility will include
1 GeV e- linac
3.56 GeV positron ring
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Tentative parameters of TAC charm factory
1.4x1034 cm-2s-1Luminosity (HD·L)
30Collision frequency, MHz
0.056-Beam-beam tune shift
3.763.76Transverse size at IP, μm
0.450.10Bunch length, cm
22.006.17Normalized emittance, μm·rad
0.450.45β function at IP, cm
11.000.55Particles per bunch, 1010
3.561.00Energy, GeV
e+-ringe--linacParameter
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SR in linac-ring type machines
Chosen emittance (3 nm·rad ) of the positron small enough a third generation light source (< 20 nm·rad )Number of insertion devices and beam lines of TAC SR Facility and their specificationsdepend on realization of SESAME and CANDLE projects as well as on user potential in our region.
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Proton Accelerator
TAC proton accelerator proposal consists of 100-300 MeV energy linear pre-acceleratorand 1-5 GeV main ring. The average beam current values for these machines would be ~30 mA and ~0.3 mA, respectively. Proton beams from two different points of the synchrotron will be forwarded to neutron and muon regions, where a wide spectrum of applied research is planned.
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Planned uses of proton accelerator
Muon region• fundamental investigations
• test of QED and • muonium-antimuonium oscillations...
• applied investigations with μSR method• High-Tc superconductivity• phase transitions• impurities in semiconductors...
Neutron region• applied physics• molecular biology • fundamental physics
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OSCILLATOR FEL
2
2
: Undulator Period[m]Wavelength of FEL; [m] 1 : Lorentz Factor
2 2: Undulator Strength
SEL
uu K
K
λλλ γγ
⎛ ⎞= +⎜ ⎟
⎝ ⎠
A relativistic electron beam coming from a linac is inserted to a sinusoidal magnetic field (undulator magnet).
While passing through the undulator, electron beam losses some of its energy and emits radiation.
The radiation emitted from the beam is trapped between two mirrors.
When the radiation power is saturated, it is taken out of one of themirrors via a hole.
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TAC IR FEL Test FacilityBefore building a medium size accelerator complex• to get experience on accelerator technology on smaller scale• to train young accelerator physicists
we plan to build infrared free electron laser (IR FEL) on 15-40 MeV e-linac until 2010.
IR FEL thought to work in oscillator mode.
Two Undulators will produce laser at wavelengthrange of 2-180 μm.
{ }
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The Place of TAC IR-FEL
TAC IR FEL
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FEL PR0JECTS IN THE WORLDFEL PR0JECTS IN THE WORLD
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TAC Test Facility (IR-FEL)TAC Oscillator IR-FEL includes;
an electron linac(15-40 MeV energyrange)
two opticalresonators
two undulators
(λU1=3cm,λU2=9 cm).
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TAC IR LASER FACILITYAccelerator Parameters
1 - 250.1 - 40 /cw
131 - 10
177
12 - 40ELBE IR FEL
1 Macro pulse freq. /Hz0,1Macro pulse duration /ms
13Microbunch repetitionfrequency /MHz
5Microbunch duration /ps
2,6Average beam current/mA200Bunch charge /pC
15 -40Electron beam energy / MeVTAC IR FELParameters
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TAC Infrared-FEL
The laser wavelength is planned to scan 2 - 190 microns range
Laser wavelength tunebility with respect to the undulators gap
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Preliminary parameters of TAC IR-FEL
~1015~1015Average Flux [photons/s.eV]
0.1 – 10 0.1 – 10 Average Power [W]
0.01-30.01-3Pulse energy [μJ]
10 – 1902– 27Radiation Wavelength [μm]
U-2U-1FEL Parameters4090Number of Periods
0,8 – 2,30,3 – 1 K Parameter
0,1–0,270,1–0,35Magnetic Field [T]
93Period [cm]
U-2U-1Undulator Parameters2.6Average Current [mA]
13Bunch Repetition Rate [MHz]
5Bunch Length [ps]
200Bunch Charge [pC]
15-40Beam Energy [MeV]
Linac Parameters
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TAC Infrared-FEL
Schematic view of TAC IR-FEL facility
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2. Undulator(λu =3 cm )
1. Undulator( λu =9 cm )
1,5 – 1,94 – 9,5W.L. Range for 40 MeV e- [μm]
3,44 – 3,155,5 – 12W.L. Range for 35 MeV e- [μm]
3,15 – 3,869 – 23W.L. Range for 25 MeV e- [μm]
4,21 – 5,6314 – 35W.L. Range for 20 MeV e- [μm]7,5 – 9,524 – 64W.L. Range for 15 MeV e- [μm]
2,6 – 4,4310 – 27W.L. Range for 40 MeV e- [μm]4 – 5,214 - 35W.L. Range for 35 MeV e- [μm]
6,98 – 10,526 - 68W.L. Range for 25 MeV e- [μm]
11 – 1540 - 107W.L. Range for 20 MeV e- [μm] 18 – 2770 - 190W.L. Range for 15 MeV e- [μm]
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Undulator Magnet Parameters
Halbach formula
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( ) ( )2
14 2 2
0
1.74 10 [ ] [ ]nn n
d F N E GeV I A F K f nd d
θ
νω
=
= ×Ω
( )2sin / 2
/ 2f νν
ν⎛ ⎞= ⎜ ⎟⎝ ⎠
2 n
n
N ε εν πε−
=
2
2
0.947 [ ( )]( )(1 / 2)n
u
n E GeVncm K
ε ελ
= =+
( )
( ) ( )
2
2
2
2
22( 1) / 2 ( 1) / 2
1 _ _2 1
1 _ _4 1 / 2n
n n
K for helical undulatorsK
KF K for planner undulatorsK
n J n J n
ξ
ξ
ξ ξ ξ− +
⎧= →⎪ +⎪
⎪⎪⎪= = →⎨ +⎪⎪⎪
⎡ ⎤−⎪ ⎣ ⎦⎪⎩
Flux of FEL
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[ ] [ ][ ] ( )[ ]( )2
442
.10977.3
KKfcm
mmNGeVEB
bu
zs
λ
σ⎟⎠⎞
⎜⎝⎛×≅
[ ] [ ][ ] [ ]
[ ]
21.
ˆ104.6 2
337
Kmm
cmLcmGeVE
NAIB z
cup
+×≅
σλ
2 22 2 / / / / %0.1
4 4x z x z x z
F FB foton s mm mrad bgπ σ σ σ σ π ε ε
= = =′ ′
, , ,\x z x z x zσ ε β′ =
, , ,x z x z x zσ ε β=
Brigthness
Saturation Brigthness
Peak Brigthness
In practical units...
Electron beamdivergence
Electron beamtransverse dimensions
Brightness of FEL
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HızlandırıcıTeknolojileri EnstitüsüVeLaboratuvar
TEKNOLOJİGEL. BÖL.
MÜH. FAK.Ankara Üniversitesi
Virancık (50. Yıl) KampüsüGÖLBAŞI
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Building Plan of TAC IR FEL
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Experimental stations are planed to make research on Biomedical Science, Semiconductors, Material Science, Nonlinear Optics, Photo-Chemistry and Nanotechnology.
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Time Schedule2000:
Completion of the Feasibility Report2005:
Completion of the Conceptual Design Report2006-2007:
Completion of optimization for the IR FELStarting Technical Design Report study for TAC
2008:Construction of buildings for the Institute and TAC-IR FEL Facility
2009-2010:Installation of the TAC IR FEL Completion of the TAC Technical Design Report
2011:Commissioning of TAC-TFGovernmental decision on approval of TAC project
2015:Completion of charm factory and light source part of TAC project.
2017:Completion of proton accelerator and experimental stations
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Conclusion
• The accelerator based light sources have become the most promising and moderntools for the basic research and technology in the 21st century.
• In this work, related with an oscillator FEL, an example for one of the light sourcesin the TAC (Turkish Accelerator Centre) has been presented covering two possibleenergy options of 15 and 40 MeV with a wavelength range of 2-180 microns bymeans of a variable gap undulator.
• In future TAC project will go on to be a focal point for the scientific societies in Turkeyand in our region with its synchrotron and FEL sources that have been studying underthe research of several colaborating scientists and engineers.
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International Collaborations
CERN (Geneva)DESY (Hamburg) ..since 1996
BESSY (Berlin)FZR (Dresden)4GLS (Daresbury)iFEL (Osaka Univ.)John Adams Inst. (Oxford Univ.)ELETTRA (Trieste)
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Announcements
III. UPHUK3rd National Particle Accelerator and ApplicationsCongress17-20 Sept. 2007, Bodrum, Turkey
III. UPHDYO3rd National Particle Accelerator and DetectorsSummer School20-24 Sept. 2007, Bodrum, Turkey
http://bilge.science.ankara.edu.tr
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If you want to join us,
you can come to TURKEY easily!You have a still time.
Bodrum is well knownin the other countriesespecially for go on holiday.
http://www.bodrum-bodrum.com/(more information about Bodrum)
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Thank you for your attention…