LLRF at SSRF. Yubin Zhao

Transcription

1 LLRF at SSRF Yubin Zhao

2 contents SSRF RF operation status Proton therapy LLRF Third harmonic cavity LLRF Three LINAC LLRF Hard X FEL LLRF (future project )

3 Trip statistics of RF system Trip times Trip hours(h) Storage Ring RF Three CESR type cavities Booster RF Two five-cell normal cavities

4 Proton Therapy LLRF (1) Proton accelerator layout LLRF remote GUI tatus: 8000 point look up table: Energy have been arrived 250MeV Frequency ramp Optimize the parameters of 70MeV, 250MeV and extraction Amplitude ramp The treatment system isn t installed Phase complement,

5 Proton Therapy LLRF (2) SG DDS Clock distribution Ethernet Trigger in ADC CPCI Platform S-H-frequency DAC Base-frequency FPGA DAC Combiner SSA Finemet Cavity T-H-frequency DAC Clock 1.4MHz~7.5MHz Clock Parameters: 1. Frequency: 1.4~7.5MHz 2. Finemet Cavity, Q ~ SSA:10kW 1.4~7.5MHz 4. Include second and third harmonic frequency acceleration 5. Accelerate voltage: 2kV

6 Proton Therapy LLRF (3) Amplitude and phase response from 1.4MHz to 7.8MHz test Local GUI Amplitude and phase stability: +/-1%,+/-1 Degree

7 LLRF for Harmonic cavity (1) Harmonic cavity in SSRF In Shanghai Synchrotron Radiation facility (SSRF), A passive third harmonic cavity will be used to increase Touschek lifetime. To control the voltage of harmonic cavity, a tuned loop control system will be designed for it. SSRF harmonic RF system Preliminary design Front-end sampling module Digital processing module Tuner control module

8 LLRF for Harmonic cavity (2) Third Harmonic SC control block Ethernet CPCI Platform Piezo driver Motor driver From SG 500MHz Beam current LLRF controller 1.5GHz SC A. The hardware will same as our third generation LLRF B. Detect the amplitude of cavity and beam current

9 LINAC LLRF(1) Three project: SXFEL DCLS UEDM SXFEL(Soft-X Free Electron Laser) Installed at 11/2016, Under RF conditioning Including 4 Sets of S-Band (2856MHz), 7 Sets of C-Band (5712MHz), 1 Set of X-Band(11424MHz) DCLS(Dalian Coherent Light Source), Installed at 07/2016 Including 4 Sets of S-Band Ultrafast Electron Diffraction and Microscopy at Shanghai Jiaotong University, Installed at 05/2017 Including 1 Set of S-Band 1 Set of C-Band -By microwave group

10 LINAC LLRF(2) LLRF architecture Two sets of LLRF cards are installed in one MTCA chassis to drive two amplifiers. The LLRF cabinet is one water-cooled, temperature-controlled rack, whose temperature stability is ±0.1º. Reference signal 5712MHz SIS8300L2+ DWC8VM1(HF) Modulator Solid State Amplifier MTCA Chassis SSA Klystron SLED REF Rfref Clock & LO LO CLK Modulator LO & CLK SSA Klystron SLED RTM MTCA4.0 RTM-DWV8VM1HF RTM-DWV8VM1HF Load Load Trigger AMC Backplane AMC Power Unit MCH CPU SIS8300L SIS8300L A0 A1 A2 A3 To OPI Trigger LLRF of C-Band Load Load Load Load LLRF Cabinet -By microwave group

11 The results LINAC LLRF(3) DCLS Amplitude and phase stability: 0.06%(rms), 0.09º(rms) Energy: MeV, Energy Spread: 0.029% Ultrafast Electron Diffraction and Microscopy Amplitude and phase stability: 0.06%(rms), 0.03º(rms) Soft-X FEL is under testing Energy: 3.06MeV, Energy stability: 0.05% Energy spread: 0.06% -By microwave group

12 Hard X FEL project introduction and LLRF

13 Hard X FEL parameters Beam current: 0.2mA Beam energy: 8GeV CW mode operation, bunches up to 1MHz TTF type cavity

14 Hard X FEL Schedule Begin at end of 2017,finished 2024 Tunnel construction: Utility: Key technique and prototype manufactured: Main device manufactured: Device installed and integrated: commissioning: Approved in

15 Hard X FEL SC linac undulator beamline Long beamline Gun Switchyard dumps Exp. Hall Far Hall 0 m 1400 m 1900 m 2300 m 3100 m

16 Injector Charge quantity(pc) 100 energy(mev) 100 bunch length(fwhm,ps) 8 Emittance RMS(mm-mrad) 0.39 Delta Energy RMS 0.14%

17 SC LINAC cryomodule S-cavities Beam energy(mev) L L HL BC L BC L total Gun L0 LH L1 HL BC1 L2 BC2 L3

18 Beam distribution Undulator Tunnel Vertical Kicker #2 shaft LINAC Tunnel

19 Undulator FEL-I 4keV SS 12keV SS FEL-II FEL-III 8keV SS 20keV SS

20 2K cryogenic cryogenic

21 SC LINAC RF Architecture SG Phase Reference Ethernet ATCA Platform Piezo driver Motor driver Motor driver coupler From SG 1.3GHz OR LO LLRF controller SSA Circulator 1.3GHz SC Timing Single SSA, Single Cavity

22 LLRF boards Output Piezo control signal RTM Board Output motor control signal (2) Other analog voltage I/O connector back Board PCI-E Power supply DSP Board AMC Or FMC FPGA 8G Bits memory 1000M Ethernet RF front-end 4 Down-converter CH 1 Up-converter CH RF Board RF signal IN Digital I/O IN ATCA Board

23 LLRF signal flow From reference 1.3GHz < 0dBm 1.32GHz Pick-up signal 1.3GHz < 0dBm 1.32GHz Forward signal 1.3GHz < 0dBm 1.32GHz Reflect signal < 0dBm 0< dbm 1.3GHz 1.32GHz 20MHz 1.32GHz Control signal 20MHz Mixer AMP Variable Att Filter To ADC >10dBm Control signal 20MHz Mixer AMP Variable Att Filter To ADC >10dBm Control signal 20MHz Mixer AMP Variable Att Filter To ADC >10dBm Control signal 20MHz Mixer AMP Variable Att Filter To ADC >10dBm Control signal 1.3GHz Mixer AMP Variable Att Filter To SSA >12dBm RF Front-end ATCA Platform Pick-up Reference signal Downconverter ADC DAC Up-converter SSA Circulator cavity Cavity signal Forward signal Reverse signal Downconverter Downconverter Downconverter ADC ADC ADC FPGA slow speed DAC output to drive piezo 8 channel Optocouplers I/O to drive the step motor Phase detect between cavity and RF reference Cavity voltage setting to Quench detector other Digital I/O LLRF signal flow and interface

24 One cryomodule and RF layout front view lateral view

25 Thanks!