Krzysztof Czuba, ISE, Warsaw ATCA - LLRF project review, DESY, Dec , XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser Master Oscillator and Distribution Phase Reference Signals for the ATCA System Presenter: Krzysztof Czuba

Krzysztof Czuba, ISE, Warsaw ATCA - LLRF project review, DESY, Dec , XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 2 Outline Need for precise synchronization Phase reference and timing signals for LLRF MO and timing signals for ATCA (global and local distribution) Most important problems AMC clock synthesizer and timing receiver Project status and plans

Krzysztof Czuba, ISE, Warsaw ATCA - LLRF project review, DESY, Dec , XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 3 Need for Precise Synchronization Electronic devices should be synchronized with high accuracy Required jitter for phase reference signals: – 0.1 ps short term (10 fs at some locations in XFEL) – 1 ps long term ~ RF Station Klystr on LLR F Caviti es RF Station Klystr on LLR F Caviti es RF Station Klystr on LLR F Caviti es Injector Timin g Distribution System Master Oscillator Timing Signals Phase Reference Signals

Krzysztof Czuba, ISE, Warsaw ATCA - LLRF project review, DESY, Dec , XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 4 Phase Reference and Timing Signals for LLRF VM input (1.3 GHz) LO for DWC (~1.3GHz) ADC and DAC clocks (tens of MHz) Triggers for FPGA

Krzysztof Czuba, ISE, Warsaw ATCA - LLRF project review, DESY, Dec , XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 5 Global and Local MO Signal Distribution ~ LLRF Rack (s) Distribution System Master Oscillator Phase Reference and Timing Signals RF Station LLRF Rack (s) RF Station LLRF Rack (s) RF Station LLRF Rack (s) RF Station ATC A Distribution within racks RTMRTM AMC Distribution within crates, between PCBs Local signal generation LLRF Rack ATCA Crate

Krzysztof Czuba, ISE, Warsaw ATCA - LLRF project review, DESY, Dec , XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 6 MO Signal Distribution Within ATCA Crate AMC Carrier Board Zone 3 backplane Up to 14 Carrier Boards 6 AMC slots at each carrier Up to 84 AMC modules! 14 - way splitter Zone 3 connector s 6-way each AMC RF Inpu t

Krzysztof Czuba, ISE, Warsaw ATCA - LLRF project review, DESY, Dec , XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 7 Tasks and problems Global: choice of distribution frequency Distribution within racks: choice of cables and connectors Distribution within crates: – Stable distribution in multilayer PCBs and dense differential connectors – Distribution between PCBs, problems with terminations when PCB removed – Interference from high-speed digital circuits Local signal generation – Building a circuit generating required signals (LO, Clocks,...) from the distribution frequency with satisfying accuracy

Krzysztof Czuba, ISE, Warsaw ATCA - LLRF project review, DESY, Dec , XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 8 Trigger and ADC Clock Generation and Distribution Triggers will be extracted of timing signals (optical receiver). ADC clocks will be generated from the MO reference signal AMC Clock Synth. & Timing Rec. AMC Carrier Board Zone 3 backplane Up to 14 Carrier Boards 6 AMC slots at each carrier Up to 84 AMC modules! Zone 3 connector s Clock and Trigger Distribution MO Ref. Input Optical input for timing signals

Krzysztof Czuba, ISE, Warsaw ATCA - LLRF project review, DESY, Dec , XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 9 AMC Clock Synthesizer and Timing Receiver Module Objectives: Synthesize ADC clock signals from the MO signal Receive signals from the FLASH timing system and provide trigger signals for FPGAs Module will consist of two PCBs: 1. “Analogue” part (bottom): receiver and synthesizer. 2. Digital part (top): control and interface for the analog part

Krzysztof Czuba, ISE, Warsaw ATCA - LLRF project review, DESY, Dec , XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 10 Requirements for the AMC Timing Module Clock synthesizer requirements: − Input signal: 1.3 GHz from MO − Output clock frequencies: 10 MHz – 100 MHz, 0.1MHz step − Clock stability <5 ps, (desirable < 2ps) − 3 independent clock outputs (LVDS bus) Timing Receiver requirements: − Receive and decode timing signals from the existing FLASH timing − Optical input (at front panel) − 3 independent trigger outputs (LVDS) − Mode with self trigger generation (trig freq. 0.1 – 33 Hz)

Krzysztof Czuba, ISE, Warsaw ATCA - LLRF project review, DESY, Dec , XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 11 Block Diagram

Krzysztof Czuba, ISE, Warsaw ATCA - LLRF project review, DESY, Dec , XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 12 Board Status and Plans System conception (finished, spring 07) Schematics (finished, Nov. 07) PCB layout (in progress). Planned for Dec. 07 / Jan. 08 PCB manufacturing and electrical tests: Feb. / March 08 Software for the control module: March/May 08 Functional tests: June 08

Krzysztof Czuba, ISE, Warsaw ATCA - LLRF project review, DESY, Dec , XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 13 Work and Acceptance Test Procedure After the PCB is manufactured: Electrical tests (connections, shorts,...) Write software for the main functionality of the module (synthesizer control, decoding timing signals, communications) Test performance of the main features: clock frequencies, jitter, trigger signals Write software for the auxiliary features: diagnostics: temperature sensors, signal presence monitors; self trigger generation

Krzysztof Czuba, ISE, Warsaw ATCA - LLRF project review, DESY, Dec , XFEL The European X-Ray Laser Project X-Ray Free-Electron Laser 14 Thank You for Attention