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 IV. iSAC Meeting 0.5/2 10-11 June 2012 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) 10-11 June 2012 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 50 IV. iSAC Meeting 50 10-11 June 2012