Transcript 2nd Meeting

TURKISH ACCELERATOR and RADIATION
LABORATORY in ANKARA (T.A.R.L.A.)
1
T.A.C. FREE ELECTRON LASER FACILITY
(T.A.R.L.A.)
TURKISH PHYSICAL SOCIETY
5th
INTERNATIONAL PARTICIPATION
PARTICLE ACCELERATOR and
APPLICATIONS CONGRESS
7-9 September 2013
İSTANBUL - TURKEY
Dr. Suat ÖZKORUCUKLU*
Vice Director of TAC Project
Director of TARLA
Istanbul University University
*On behalf of TAC Collaboration
The First Beam
2
The Goal
3
 The TARLA aims to obtain FEL between 2.5-250 µm ranges out of two




different optical cavity systems with undulators of 2.5cm and 9.0cm
periods. The electron beam energy is 15-40 MeV.
There is also a Bremsstrahlung line after the second accelerating
module.
The electron source is chosen to be a high average current thermionic
DC gun running at up to 250keV, which is in manufacturing phase at
the moment.
The injector system will be completely based on normal conducting
technology with two buncher cavities that operate 260 MHz and 1.3
GHz, respectively
The main acceleration structure will consist of two ELBE modules that
each houses two TESLA 9-cell SC structure. These modules are
designed to operate at 1 mA electron beam current at continuous wave
operation (CW)
10-11 June 2012
ANKARA (15km)
Town Gölbaşı
TARLA
Lake
Mogan
4
Gölbasi Campus of
Ankara University
5
6
Layout of TARLA
7
Electronics
RF & Power
Electronics
Brems. Exp.
Accelerators
FELs
FEL Experiments
He Plant
IV. iSAC Meeting
Clean Room
FEL Experiments
10-11 June 2012
Layout of T.A.R.L.A
Overview of TARLA
9
Main Components
E-Source (Gun)
Buncher Cavities
Accelerating units
Bunch Compressor
Focusing-defocusing magnets
Bending magnets
Beam Diagnostic tools
…..
Electron Gun
10

To obtain high quality FEL electron source should supply



continuous high bunch charge
with lowest emittance
We have chosen thermionic DC gun as the source
80 pC
To obtain 1.0 mA average peak current we need approximately 80 pC
bunch charge with 77 ns bunch duration
Buncher Cavities
11
standing electromagnetic wave


~500ps
The electron bunches should have short bunch length
+∆E
Therefore the bunches at the exit of the gun which has approximately 500ps
are needed to be compressed less than 10ps
drift space

And bunch separation should maintain same distance as 77 ps.
It is possible to use several Buncher and Buncher frequency should be
synchronized with RF frequency in linac.
Bunch Compressor
12
For having higher current, another equipment which should be on
beam line is bunch compressor.
Using Bunch Compressor, bunch length can be reduced less than 1ps
Accelerator Structure
13
 To achieve 40 MeV electron beam energy we are using two 2
accelerating modules with 2 TESLA (9-cell) cavities
 To have a large application area beam should have
continuous structure
 This modules will able to provide CW electron beam structure
SRF Cavities
14
 1
20 MeV . 1mA = 20kW
helium port
liquid He @ 1.8K
1.8 K helium reservoir
vacuum isolation
liquid N2 shield
solid isolation
U (t )  U 0 sin(  t   )
RF ports
10kW 1.3GHz
200-250 keV, 1 mA
v
   0.74
c
9-cell Tesla-cavity
1.3 GHz
e   bunch
Main Electron Beam Parameters
15
Parameters
Value
Energy [MeV]
15-38.5
Bunch Charge [pC]
80
Average Beam Current [mA]
1.0
Bunch Repetition Rate [MHz]
13 (16.25)
Bunch Length [ps]
0.4-6
Norm. RMS Trans. Emit. [mm mrad]
< 16
Norm. RMS Long. Emit. [keV.ps]
Macro pulse Duration [µs]
Macro pulse Reputation Rate [Hz]
IV. iSAC Meeting
< 100
40 - CW
10 – CW
10-11 June 2012
Obtaining FEL
16
λu e
K rms =
Brms
2π me c

λu
2
λSEL = 2 1+ K rms
2γ

Main Und. and Res.Parameters
17
Parameters
U1
U2
NdFe
NdFe
Undulator Period [cm]
2.5
9
Magnetic Gap [cm]
1.5
4
Effective Field [T]
0.35
0.42
0.25-0.7
0.7-2.5
60
40
Roll-off-field @ ±5mm (%)
0.03
0.11
Rayleigh Length [m]
0.97
2.08
Resonator length [m]
11.53
11.53
1st Mirror Radius of Curvature [m]
5.92
6.51
2nd Mirror Radius of Curvature [m]
5.92
6.51
Radius of Out Coupling Hole [mm]
0.5/2
Undulator Magnet Material
Undulator Strength
Number of Period
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0.5/2
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T.H.M. T.A.R.L.A. Demet Parametreleri
Some Calculations
18
K=
eB0 T
k u me c
K = 0,934. B0 T . λu cm
U25  B0 ≃ 0.35 T  K = 0.81725
λu [m]
K2
λSEL [m] =
1+
2
2γ
2
λu [cm]
K2
λSEL [Å] = 13,056 2
1+
E [GeV]
2
B0  Magnetic Field
λu  Undulator wavelenght
k u  Number of poles
U90  B0 ≃ 0.33 T  K = 2.77398
E  Energy of electrons
K  Undulator parameter
γ  Lorentz factor
T.H.M. T.A.R.L.A. Demet Parametreleri
Some Calculations
19
Max. λSEL  Max. λu
Max. K
Min. E
Min. λSEL  Min. λu
Min. K
Max. E
U90
U25
λu = 9 cm
λu = 2.5 cm
K = 2.77398
K = 0.81725
E = 0.015 GeV
E = 0.0385 GeV
λu [cm]
K2
λSEL [Å] = 13,056 2
1+
E [GeV]
2
Max. 𝝀𝑺𝑬𝑳 = 𝟐𝟓𝟑, 𝟏𝟐 µ𝐦
Min. 𝝀𝑺𝑬𝑳 = 𝟐. 𝟗𝟒 µ𝐦
T.H.M. T.A.R.L.A. Demet Parametreleri
Some Calculations
20
Esel eV = 950
E2[GeV]
K2
λu [cm] 1 +
2
Max. Energy  Min. K and Min. λu
Min. Energy  Max. K and Max. λu
λu = 2.5 cm
λu = 9 cm
K = 0.81725
K = 2.77398
Max. 𝑬𝒔𝒆𝒍 = 𝟎. 𝟒𝟏𝟑𝟐 𝐞𝐕
Min. 𝑬𝒔𝒆𝒍 = 𝟎. 𝟎𝟎𝟒𝟗 𝐞𝐕
Main FEL Parameters
21
Undulators
U1
U2
3 - 19
18-250
Micro pulse Repetition Rate [MHz]
13
13
Max Peak Power [MW]
~5
~2.5
0.1-40
0.1-30
Max. Pulse Energy [µJ]
~10
~8
Pulse Length [ps]
1-10
1-10
Wavelength [µm]
Average Power [W]
IV. iSAC Meeting
10-11 June 2012
Status of Injector
22
The injector consists of
•
a 250kV DC Gun
•
a 260 MHz S.H.B
•
a 1.3GHz F.B.,
• Solenoids,
• Diagnostics
• vacuum equipment's
IV. iSAC Meeting
10-11 June 2012
Technical: Voltage Divider
25
 ½ High Voltage Divider:
• 37 HV resistors in series
• 10Meg each resistor
• 15cm each resistor
• Each resistor has 8kV and 6.4W
@300KV
• 0.8mA 150kV output @ 300kV
8mA input
• Since mechanical design is
modular, electrical parameters can
be modified easily
10-11 June 2012
Technical: Electronics
26
1.
High Voltage Divider
2.
Custom Design Devices inside Faraday Cup:
•
Remote Controller for Pulser
•
13MHz Trigger and Macropulser for Pulser
•
RF Mixer
3.
Cathode and connections
4.
6 Channel Temperature Controller
5.
1.3 GHz Master Oscillator
6.
I/O Protection Circuit
7.
8 Channel PLL Divider
8.
Motor Drivers
10-11 June 2012
Technical: Master Osc. & PLL
27
Power
Supply
-250 kV
Thermionic
DC gun
RF
buncher
260 MHz
RF
buncher
+1,3GHz
SRF
1,3 GHz
SRF
1,3 GHz
13 Mhz
10 MHz
Reference
Oscillator
1.3 GHz
Master
Oscillator
PLL System
13/26
Mhz
260
Mhz
1.3 Ghz
1.3 Ghz
1.3 Ghz
1.3 Ghz
1.3 Ghz
1.3 Ghz
1.5 kW Amplifier (Grid)
1 kW Amplifier
200 W Amplifier
10 kW (16 kW) Amplifier
10 kW (16 kW) Amplifier
10 kW (16 kW) Amplifier
10 kW (16 kW) Amplifier
Beam Position Monitor (BPM)
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Technical: Control System
28
Technical: Software Development
29
EPICS
Extensions: MEDM, Probe, Visual CT
Soft Module: ASYN
Protocols: RS232, TCP
LAB VIEW
IV. iSAC Meeting
10-11 June 2012
Technical: LabView
30
❺
❸
32
BLM
-❾
Lazer Sis. - ❿
Aperture - ⓫
View Screens - ❺
Makro pulser - ❻
BPM - ❼
260 MHz Subharmonic
1.3 GHz Fundamental Bunchers - ❽
ICT/FCT - ❶
❹
❺
❽
❹
❶
Multislit Masks - ❷
❸
Selenoid Magnet - ❸
Steerer Magnet - ❹
❻
❺
❹ ❷
❺
❸
❼
❸
❺
❽
FCT / ICT
33
Technical: First Beam Measurment
34
Electron beam enegry was
165 keV
Grid Voltage was
-165 kV + -20V
Average Beam Current
Measurement :
Voltage was 0.035 mV
Beam Dump
Average beam current
has measured 350 uA
Ie
0.1 ohm
Shunt Resistance
Status of SRFs
35
Research Instruments offers a Super conducting RF accelerating module with 2
TESLA cavities for continuous RF operation.
This module is compact and houses two TESLA cavities and is designed for
continuous operation at accelerating fields in the range of 15 to 20 MV/m.
The cryostat design has been developed by ELBE group (Forschungszentrum
Rossendorf) and is used under a license agreement.
June 21st, 2012
3.88 M€
Tuning range
±120 kHz
External Q of HOM
couplers
Total accelerating
voltage of the
module
Total cryogenic
losses at 20 MV cw
operation
IV. iSAC
Meeting
Delivery
> 5x1011
> 20 MV
< 75W
December 2014
10-11 June 2012
Status of Bucher Cavities
Offer No. ANG-2.1/3059-00/12
Technical Part
Date: March 26, 2012
Page: 5 of 7
3.2
37
Resonance frequency
260 MHz
Theoretical Q
5800
Offer No. ANG-2.1/3059-00/12
Technical Part
Date: March 26, 2012
Page: 4 of 7
Tuning range
1 KHz
Bakeable up to
200°C
1.3 GHz Buncher
3 Specifications and Design Overview
-9 mbar l/s
Leakage
rateof the 260 MHz sub harmonic buncher and the <1.3 1E
The designs
GHz buncher
are according
to the ELBE Accelerator Design of the Forschungszentrum Dresden Rossendorf.
WeightPerformance information for both ca vities is based on design121
kgsupplied by FZ
information
Dresden and therefore not guaranteed. Guarantees can be given if the rf layout is co ntracted
as well (refer to described options). RF layout cost not inclu ded in the budgetary offer.
Material
3.1
Cu OFHC / Stainless Steel 1.4429
260 MHz sub harmonic Buncher
The design of the 1.3 GHz Buncher is similar to
Resonance frequency
1300 MHz
Theoretical Q
13.600
Technical Specification
Resonance frequency
1.3 GHz
Theoretical Q
13.600
Tuning range
2.2 MHz
Bakeable up to
200°C
Leakage rate
< 1E-9 mbar l/s
Weight
16,2 kg
Material
Cu OFHC / Sta
Tuning range
2.2 MHz
Bakeable up to
200°C
Leakage rate
< 1E-9 mbar l/s
Weight
16.2 kg
Material
Cu OFHC / Stainless Steel 1.4429
The 260 MHz cavity has 2 beam ports one on ea ch disc and 4 ports on the cylinder mantle.
The four ports are for the variable tuner and opposite to this for the frequency adjusting slug.
Two horizontal ports allo w the installation of the input coupler and the field probe.
10-11 June 2012
Status of He Plant
39
June 15th, 2012
Kick-off Meeting: October 2nd - 4th 2012
Second Meeting for Payment: May 29th – 30th , 2013
4.359 M€
Delivery Novemver 2014
10-11 June 2012
He Plant Parameters
41
Helium
LN2
IV. iSAC Meeting
Unit
Cyromodule I Cyromodule II
Dynamic
W
80
80
Static
W
15
15
Contingency W
10
10
Total
W
105
105
Temperature Maximum
K
2.1
2.1
Minimum
K
1.8
1.8
Pressure Stability
mbar
± 0.2
± 0.2
Liquid Level Stability
L LHe
± 2
± 2
Inventory
L
70
70
Total Heat Load
W
35
35
Temperature
K
70-80
70-80
Heat Load
10-11 June 2012
Status of RF
42
 16 kW solid state power amplifiers (SSPA) were planned for high
power RF (HPRF).
 We have been in contact with both Bruker and Thomson
Broadcast for the solid state amplifiers.
 Mechanic and thermal studies of SRF Power couplers (input &
HOM) are completed (CST),
 Design
 Simulation (CST),
 Production studies (if it is possible in TURKEY) are
ongoing…
10-11 June 2012
Status of RF Transmition Lines
43
 Conceptual design of waveguide is finished and components for transmission lines are
determined.
 HPRF transmission line simulations (HFSS) are finished. The procurement process
has been planned to complete by the end of 2013.
Name
X
Y
XY Plot 6
m2
HFSSDesign1
m10.00 1.3000 -21.4317
m2
ANSOFT
Curve Info
1.3000 -0.0844
dB(S(1,1))
Setup1 : Sw eep
dB(S(2,1))
Setup1 : Sw eep
-5.00
Y1
-10.00
-15.00
-20.00
m1
-25.00
-30.00
1.10
1.20
1.30
1.40
1.50
1.60
1.70
1.80
1.90
2.00
Freq [GHz]
10-11 June 2012
Status of Personel
44
FEL
Pervin Arıkan
HV
B. Koç
İ. Şara
RF
Ö. Karslı
A. Aksoy
Z.Sali
B.Dursun
Ç.Polat
Diagnostic
Ç. Kaya
A.Aksoy
Ç.Polat
Infrastructure
E. Kazancı
İ. Şara
M. Yıldız
Beamline
A.Aksoy
Ç. Kaya
Electronic
B. Koç
G. Kalaycı
Control
Y.Barutçu
S. Kuday
E.Kazancı
Vacuum
Ç. Kaya
E. Kazancı
M. Yıldız
Cryogenics
A.Aksoy
Ç.Kaya
Resonators
A. Aksoy
H. Tugay
Experimental Groups
45
FEL
Pervin Arıkan
Diagnostic
İ.Tapan
Ultrafast PAL
H. Altan
O. Esentürk
Gen. IR Lab.
A.Aydinlı
Bio-Micro SL
F. Severcan.
Material PL
Ö. İlday
BREMSSTRAHLUNG
İskender Akkurt
Detector
M.Doğru
S. Şahin
IV. iSAC Meeting
e. Dump
G. Yeğin
S.Sariaydin
Photon Dump
H.O. Tekin
Radiator
N. Demir
Z.Demirci
Simulation
N. Karpuzcu
10-11 June 2012
Planned Experiments
46
IR FEL Stations (5):
 Photon science and diagnostics
 Ultrafast photonics applications
 General IR spectroscopy
 Material characterization
 Bio-micro spectroscopy and biomedicine
Bremsstrahlung station (1):
 Nuclear spectroscopy
Commissioning of TARLA
accelerator is expected in 2016
TARLA is an official member of EU-FP7 Project named as CALIPSO
for training of users in any 20 European Light Source Facilities
iMAC
47
Peter MICHEL (HZDR-ELBE, Germany) (Head)
Hideaki OHGAKI (Kyoto University, Japan)
Dieter TRINES (DESY, Germany)
Ernst WEIHRETER (HZB-BESSY, Germany)
Jean R. DELAYEN (JLab, USA)
1st Meeting:
December 4-5, 2009
Ankara University
2nd Meeting:
September 2-3, 2010
Bodrum, Mugla
3rd Meeting:
May 12-13, 2011
IAT, Ankara University
2010
4th Meeting:
March 8-9, 2012
IAT, Ankara University
5th Meeting:
April 22-23 2013
IAT, Ankara University
TARLA WBS
48
IT & Network --- Follow us
49
http://tarla.ankara.edu.tr
http://www.tarla-fel.org
IV. iSAC Meeting
10-11 June 2012
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IV. iSAC Meeting
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10-11 June 2012