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11/21/22 Cost estimate submitted (seems higher than expected based on previous) Chao:LLRF System Control Design mostly done (just waiting on some simulation results from Zenghai_ Start looking into Low-level RF system from Larry Frequency Control in Software Amplitude Flatness and Amplitude/Phase Control firmware BoSSA almost ready to send out Klystron only needs 200W, making a 350Watt board Firmware/hardware ready to start development Stephen to check project tasks with people 9/12/2022 We will be doing the 1.5 with 1 RFSoC setup, but the rest of the system is unclear (we may as RadioBeam to do it) ChaoCurrently working on data converter characterizationWill probably be done in the next month Trying to determine what configuration would be ideal for the up and down conversion Noise analysis We need to figure what what (analog) band-pass filter we need. Still need to work out specifications for the algorithm (with RadioBeam + Kukhee) LarryIn the next month:Identify digital IOs and decide if we can buy or need to make a card to accommodate After Chao is done with characterization, change the firmware interface from a real-real to real-IQ conversion and then take IQ to the coreNeed interface information from Kukhee Port register map to current software interface KukheeStill catching up on things Discuss division of firmware(?) labor with Chao Need to discuss firmware/software division of signal conversion with RadioBeamPulse-pulse control in firmware?Present a proposal on how to do this to RadioBeam Multi-cavity control in software? BoWorking on SSAPower supply is pulsed gate which requires a trigger Will eventually need to generate an interlock signal Will be out on vacation 9/26-10/5Kukhee and Chao to lead the meeting on algorithm discussion with RadioBeam? StephenOn medical leave 9/16-10/16 Need to get a charge number for people to use 9/6/2022 Meeting on Thursday with higher-ups We should use Teams for working with RadioBeam/other groups Need to get an understanding of how the firmware should function + division of work L. Doolittle typically does specialized, non-modular code (used in LCLS II) which can be hard to port over/understand. Can we have Chao/Larry do the firmware and have LCLS-RadioBeam define requirements/review our codeCould also have them do some software tasks: Pentalinux P4P + efuse reading/writing for ultrascale+ platform Chao thinks Kukhee's code might be a good basis given a proper set of requirements Larry's slides on Phase 1.5 HW Block 2Channels in, 1 Channel out Baluns ADCs to run at 2.4576 GS/s 12VDC power FMC Digital I/O requirements:Digital trigger output for SSA (1 channel, 0V - 3.3V). Will need modulator (2 channel), interlock (x channel), and debug (1 channel) output triggers in the future (not sure on specifications, discuss RadioBeam). Digital inputs TBD with RadioBeam Chao's Data Converter Characterization Trying to reocver/understand Dan's previous work Evaluation tool is limited to running 1.6us samples meaning stability is too low (want ~5us) Test: Signals from RFSOC loaded to DAC and looped back to ADCs. ADC output processed in Matlab (excludes op-amp downcoverter)(Bo) Could do an FFT to check there's anything extra going on Next test to include up/down converters Chao's RFSoC SOM Purchase Proposal XRF16: 26 weeks, $30k/SOM + $6k/carrier. Will want 6x each ($216k) Ryan+Stephen: Budget plan is incomplete and Schedule is on existent We need a charge number for work on this project 8/29/2022 Bo had her first meeting with the high power people last weekBriefly discussed progress and later met with Radiobeam to discuss technical parts and RFSoC Most of their FPGA experience is Larry Doolittle We should consider having Radiobeam lead the hardware architecture design. Should discuss further with RyanWe drive
it but they do the documentation Chao and Larry need to document the phase reference (LMK/LMX) clock distribution scheme Larry needs to complete importing Dan Van Winkle's .XCI and adding LMX to rogue software for next week and make sure it syncs with the ADCs and DACs Chao/Kukhee needs to define the exact interface between ADC/DAC and LLRF DSP Chao/Kukhee needs to define the specification for the LLRF DSP Chao will present the RFSoC SOM design trade study for next week's meeting (Note that Monday is a holiday)Recommend buying 16 channel SOM, but will need to provde a justification as it is high price (>$100k) and long lead time (>26week) Stephen to start taking meeting notes and review Ryan's Smartsheet stuff prior to official release of budget/schedule
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