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SESAME Storage Ring RF-System

SESAME. SESAME-TAC meeting Nov.2012. SESAME Storage Ring RF-System. Darweesh FOUDEH on behalf of RF Group: 1- Nasha’t Swai ’. 2- Ala ’ Kurdi. SESAME SR RF System – Darweesh FOUDEH. SESAME. SESAME SR MAIN PARAMETERS. SESAME-TAC meeting Nov.2012. SESAME SR RF System – Darweesh FOUDEH.

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SESAME Storage Ring RF-System

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  1. SESAME SESAME-TAC meeting Nov.2012 SESAME Storage RingRF-System Darweesh FOUDEH on behalf of RF Group: 1- Nasha’tSwai’. 2- Ala’ Kurdi. SESAME SR RF System – Darweesh FOUDEH

  2. SESAME SESAME SR MAIN PARAMETERS SESAME-TAC meeting Nov.2012 SESAME SR RF System – Darweesh FOUDEH

  3. SESAME SESAME-TAC meeting Nov.2012 SESAME RF Layout and Main Parameters SESAME SR RF System – Darweesh FOUDEH

  4. SESAME SESAME SR RF System General layout SESAME-TAC meeting Nov.2012 • So far, the above analog LLRF has been suggested for the Storage Ring • As a strong alternative, adopting a digital LLRF for the Storage Ring RF system is being studied. • A proposal for establishing a collaboration between ALAB & SESAME to build the SESAME DLLRF SESAME SR RF System – Darweesh FOUDEH

  5. SESAME SESAME-TAC meeting Nov.2012 Proposed Digital LLRF System 520 MHz Main Oscillator 500 MHz 520 MHz Digital Clock (80 MHz) 20 MHz IF ADC DAC IQ modulator FPGA I´ 500 MHz Amp ADC DAC Q´ Digital IQ Demodulation IF 20 MHz 520 MHz DSP/PID Local Oscillator 20 MHz 500 MHz (Forward Signal) Cavity 500 MHz (Cavity Signal) Cavity Tuning Stepper Motor SESAME SR RF System – Darweesh FOUDEH

  6. SESAME SESAME-TAC meeting Nov.2012 Digital LLRF • Advantages • Flexible and Reconfigurable via Software. • Many sophisticated algorithms can be implemented via software. • Remotely controlled and multi-user operation. • DLLRF has built-in diagnostics, low down-time (MTBF), and high resolution is achievable. • Disadvantages • Long group delay. • More sensitive to radiation. • Needs good programming skills to develop software programs. SESAME SR RF System – Darweesh FOUDEH

  7. SESAME SESAME SR RF Power Amplifier SESAME-TAC meeting Nov.2012 • SESAME has adapted the SSA technology instead of vacuum tubes due to: • absence of high biasing voltages. • longer life times. • stable gain with aging. • easier and quicker maintenance and no machine interruption. • possibility of reduced power operation in case of failure. • SOLEIL design for 500MHz module had been adapted as the main block for building the amplifier tower based on the LDMOS BLF578XR transistors from NXP Semiconductors. • The –XR version showed lower performance compared to prior one, so it was dumped and will not be used to drive the RF module. SESAME SR RF System – Darweesh FOUDEH

  8. SESAME SESAME-TAC meeting Nov.2012 • SESAME SSA main block showing: • Power transistor with the surrounding circuit. • 2KW circulator on the output with (495-505) MHz BW. • 350W dummy load. SESAME SR RF System – Darweesh FOUDEH

  9. SESAME SESAME-TAC meeting Nov.2012 • SESAME SSA main module tests. • Two colleagues from the RF group had visited SOLEIL to do all required tests. • Phase1 tests were based on testing each module by itself, two groups of the module were identified, one is using the BLF578 x 8 and the other is using BLF578XR x 6. • Phase2 tests were made for the whole group test as one amplifier. • Phase3 tests were made by combining the two groups. • The desired output level for each module was 650W@500MHz for both groups. SESAME SR RF System – Darweesh FOUDEH

  10. SESAME SESAME-TAC meeting Nov.2012 • Gain vs. Pout for each module • BLF578: 16.3 dB. • BLF578XR: 15.4 dB. SESAME SR RF System – Darweesh FOUDEH

  11. SESAME SESAME-TAC meeting Nov.2012 • Efficiency vs. Pout • BLF578: 63%. • BLF578XR: 55%. SESAME SR RF System – Darweesh FOUDEH

  12. SESAME SESAME-TAC meeting Nov.2012 Module BLF578#1 gain tests with respect to VDS voltage SESAME SR RF System – Darweesh FOUDEH

  13. SESAME SESAME-TAC meeting Nov.2012 Module BLF578#1 efficiency tests with respect to VDS voltage SESAME SR RF System – Darweesh FOUDEH

  14. SESAME SESAME-TAC meeting Nov.2012 Gain & Efficiency vs. combined power of the BLF578 modules SESAME SR RF System – Darweesh FOUDEH

  15. SESAME SESAME-TAC meeting Nov.2012 G & η vs. output power: combined output power of 6LF578 + 6BLF578XR SESAME SR RF System – Darweesh FOUDEH

  16. SESAME SESAME-TAC meeting Nov.2012 • Module Degradation Test • Two groups of 8-Modules each were prepared. • First group was tested with 650W to give a total output of 5.2KW for 1000h. • Second group was tested with 725W to give a total output of 5.8KW for 1000h. • The results of tests showed stable performance after 1000h. • After the 1000h test is finished each module will be tested individually to check all its parameters in details. SESAME SR RF System – Darweesh FOUDEH

  17. SESAME SESAME-TAC meeting Nov.2012 RF Module DC-DC converter 300V–to- 50V RF tower power supply implemented in SOLEIL RF tower power supply will be implemented in SESAME; 220ACV-to-50VDC/2KW. SESAME SR RF System – Darweesh FOUDEH

  18. SESAME SESAME-TAC meeting Nov.2012 SESAME 75KW tower Solid State Amplifier architecture 600W 600W 120W 3W 120W 3W 4.8KW 4.8KW 24W 24W 0.6W 0.6W 38.4KW 38.4KW 2-Way Combiner 76.8KW All RF modules have 16dB gain@600W output. 000 SESAME SR RF System – Darweesh FOUDEH

  19. SESAME SESAME RF Plant Layout SESAME-TAC meeting Nov.2012 SESAME SR RF System – Darweesh FOUDEH

  20. SESAME SESAME-TAC meeting Nov.2012 SOLEIL Storage Ring RF Solid State Amplifiers (SSA) SESAME SR RF System – Darweesh FOUDEH

  21. SESAME SESAME-SOLEIL Collaboration SESAME-TAC meeting Nov.2012 • Two RF cavities had been received by SOLEIL from Elettra by the end of May2012. • One of them has the HOM shifter while the other doesn’t. • By visual inspection the cavities look in good shape but its cooling pipes need re-welding. • Max. RF power through its input coupler is 60KW. • Testing RF plant will be built consist of: • RF Cavity. • 75KW amplifier. • Waveguides. • Cooling rack for cavity. • Shielding room for cavity operation. SESAME SR RF System – Darweesh FOUDEH

  22. SESAME SESAME-TAC meeting Nov.2012 SR Power Requirements • Due to input coupler power limitations the two Elettra cavity will be used mainly for the phase1 commissioning of the SR. • Max. stored current will be around 25mA. • To operate the SR at 2.5GeV/400mA with extra 100KeV due to ID’s and 4 OVF would require each cavity to be able to handle 150KW. • Other options are under investigation, i.e.: • EU cavity. • PEP2 cavity. • KEK damped cavity. • Elettra cavity with the new I/P coupler design. SESAME SR RF System – Darweesh FOUDEH

  23. SESAME SESAME-TAC meeting Nov.2012 SESAME SR RF Cavities Power coupler Tw ± 0.1°C DLcav Plunger Phase2: Chosen cavities should be capable to compensate the energy losses of about 700KeV@400mA Phase1: 2Elettra cavities with 60KW.max I/P Coupler SESAME SR RF System – Darweesh FOUDEH

  24. SESAME SESAME-TAC meeting Nov.2012 KEK damped cavity used in the PF-ring. SESAME SR RF System – Darweesh FOUDEH

  25. SESAME SESAME-TAC meeting Nov.2012 Ready System: SESAME Booster RF Plant and Local Control From BESSY I Purchased by EU fund donation Donated by Soleil Local Control Unit (LCU) SESAME SR RF System – Darweesh FOUDEH

  26. SESAME SESAME-TAC meeting Nov.2012 SESAME Booster RF Plant Booster LLRF (from BESSY I) tested in the RF lab The new 2kW Solid-State amplifier as replacement for the old klystron used in BESSY I Booster 2KW RF Cavity (BESSY1) SESAME SR RF System – Darweesh FOUDEH

  27. SESAME SESAME-TAC meeting Nov.2012 Thank You SESAME SR RF System – Darweesh FOUDEH

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