High speed LWL connections for WP02 Holger Schlarb DESY on behalf of Wojciech Wierba How to edit the title slide Upper area: Title of your talk, max. 2 rows of the defined size (55 pt) Lower area (subtitle): Conference/meeting/workshop, location, date, your name and affiliation, max. 4 rows of the defined size (32 pt) Change the partner logos or add others in the last row.

Fast Interconnections XSIN/XTL Contact person LLRF: Wojciech Wierba / Tomasz Jezynski Assume that all Ethernet connections for LLRF have been taken into account -> Infrastructure requirement document from Wojciech Wierba Document does not contain LWLs for high speed data exchange: Point-to-point connections between neighboring RF stations: 24 Bidirectional, daisy chain, minimum latency, SFPs, always 2 fibers A1.I1 <-> A2.L1 <-> A3.L2 <->A4.L2<->A5.L2 <-> A6.L3<-> …<->A25.L3 Point-to-point connections to semi-central station: 20+3 4 x 6 RF stations grouped in L3 + interconnection, star topology Fast distribution of charge readout from Toroids to L1/L2/L3 25 New, BPM system is not capable to deliver required charge resolution Different topologies feasible Longitudinal intra-train FBs 7+(7) Monitor -> Pre-procession unit -> LLRFn & LLRFn+1 Not considered: transverse IBTF/signals from photon diag & user exp. Before you start editing the slides of your talk change to the Master Slide view: Menu button “View”, Master, Slide Master: Edit the following 2 items in the 1st slide: 1) 1st row in the violet header: Delete the existent text and write the title of your talk into this text field 2) The 2 rows in the footer area: Delete the text and write the information regarding your talk (same as on the Title Slide) into this text field. If you want to use more partner logos position them left beside the DESY logo in the footer area Close Master View

Upgrade of synchronization system XSE -> XTL directly to LO RF station standard SMF fibers, but temperature stable enviroment CW version of optical synchronization (sub 50fs…) Number of connections 20 (40) 1 fiber sufficient Before you start editing the slides of your talk change to the Master Slide view: Menu button “View”, Master, Slide Master: Edit the following 2 items in the 1st slide: 1) 1st row in the violet header: Delete the existent text and write the title of your talk into this text field 2) The 2 rows in the footer area: Delete the text and write the information regarding your talk (same as on the Title Slide) into this text field. If you want to use more partner logos position them left beside the DESY logo in the footer area Close Master View

Layout longitudinal FBs for European XFEL OXC BBF Charge BBF Osc. BBF BBO 3 feedback loops to stabilize photoinjector laser & charge Laser Toroid OXC Gun I1 3rd BC0 BC1 BC2 L1 L2 L2 L2 ~ L3 BAM A/ A/ BCM EO A/ BAM BAM BCM EO A/ A/ A/ BAM BAM BCM SPEC LLRF LLRF uTCA LLRF LLRF uTCA LLRF LLRF LLRF uTCA BBF Gun BBF I1 BBF L1 BBF L2 4 feedback loops to stabilize arrival times, compression, shape & energy Before you start editing the slides of your talk change to the Master Slide view: Menu button “View”, Master, Slide Master: Edit the following 2 items in the 1st slide: 1) 1st row in the violet header: Delete the existent text and write the title of your talk into this text field 2) The 2 rows in the footer area: Delete the text and write the information regarding your talk (same as on the Title Slide) into this text field. If you want to use more partner logos position them left beside the DESY logo in the footer area Close Master View ~ L3 L3 COLL BAM A A BPMs BAM BPMs BPMs BPMs BAM LLRF LLRF uTCA BBF L3 1 feedback loop to stabilize final beam energy

Interconnection between RF stations Beam direction 51m RF Station n-1 RF Station n RF Station n+1 L3(n-1_1) L3(n-1_2) L3(n-1_3) L3(n-1_4) L3(n_1) L3(n_2) L3(n_3) L3(n_4) L3(n+1_1) L3(n+1_2) L3(n+1_3) L3(n+1_4) Slave Master Slave Master Slave Master Option 2 Option 1 Latency: SFP in-> SPF out 130ns LWL 60m RF(n) to RF(n+1) 300ns Option 1: Master An ->Master An+1 430ns ideal Option 2: Master An -> Master An+1 560ns acceptable, has additional advances Option 1: Master An-> Master An+2 860ns Option 2: Master An-> Master An+2 1120ns Option 1: Master A6-> Master A25 8.6us Option 2: Master A6-> Master A25 11.2us Before you start editing the slides of your talk change to the Master Slide view: Menu button “View”, Master, Slide Master: Edit the following 2 items in the 1st slide: 1) 1st row in the violet header: Delete the existent text and write the title of your talk into this text field 2) The 2 rows in the footer area: Delete the text and write the information regarding your talk (same as on the Title Slide) into this text field. If you want to use more partner logos position them left beside the DESY logo in the footer area Close Master View

Central control unit for RF stations Beam direction LP1 - VS LP2 - VS LP3 - VS LP4 - VS A06 A07 A08 A09 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A23 A24 A25 LLRF Sub-central LLRF Sub-central LLRF Sub-central LLRF Sub-central 255m Latency: 5 Station grouped 4*130ns+2*2*300ns = 1.72us 10 stations grouped 4*130ns+2*5*300ns = 3.5 us 20 station grouped 4*130ns+2*10*300ns = 6.5 us Before you start editing the slides of your talk change to the Master Slide view: Menu button “View”, Master, Slide Master: Edit the following 2 items in the 1st slide: 1) 1st row in the violet header: Delete the existent text and write the title of your talk into this text field 2) The 2 rows in the footer area: Delete the text and write the information regarding your talk (same as on the Title Slide) into this text field. If you want to use more partner logos position them left beside the DESY logo in the footer area Close Master View

Charge signal from toroids Beam direction LP1 - VS LP2 - VS LP3 - VS LP4 - VS W A06 A07 A08 A09 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A23 A24 A25 uTCA … LLRF Sub-central LLRF Sub-central LLRF Sub-central LLRF Sub-central Latency: Direct: 1*130ns+4000ns – 2660ns =1.46us + Toroid Elect. 255m Before you start editing the slides of your talk change to the Master Slide view: Menu button “View”, Master, Slide Master: Edit the following 2 items in the 1st slide: 1) 1st row in the violet header: Delete the existent text and write the title of your talk into this text field 2) The 2 rows in the footer area: Delete the text and write the information regarding your talk (same as on the Title Slide) into this text field. If you want to use more partner logos position them left beside the DESY logo in the footer area Close Master View

LLRF SFP connections Circa August muessen die Anforderung stehen Juli Before you start editing the slides of your talk change to the Master Slide view: Menu button “View”, Master, Slide Master: Edit the following 2 items in the 1st slide: 1) 1st row in the violet header: Delete the existent text and write the title of your talk into this text field 2) The 2 rows in the footer area: Delete the text and write the information regarding your talk (same as on the Title Slide) into this text field. If you want to use more partner logos position them left beside the DESY logo in the footer area Close Master View

Feedback concept for XFEL (test at FLASH) Actuator Digital FB Controller Q, X, Y A/ Electron beam RF Monitors Preprocessing & corrections real time Actuator Digital FB Controller Q, X, Y A/ Electron beam RF Monitors Preprocessing & corrections real time Current structure at FLASH: BBF acts real time only on set-points for RF field stabilization (no conflict) Drawback: MIMO controller optimized for RF measurements For beam based signals larger gain (different controller) possible Action: MIMO controller which includes beam based signals (acts on SP & FF) Before you start editing the slides of your talk change to the Master Slide view: Menu button “View”, Master, Slide Master: Edit the following 2 items in the 1st slide: 1) 1st row in the violet header: Delete the existent text and write the title of your talk into this text field 2) The 2 rows in the footer area: Delete the text and write the information regarding your talk (same as on the Title Slide) into this text field. If you want to use more partner logos position them left beside the DESY logo in the footer area Close Master View Upstream FB can cause significant signal change on downstream monitor Drawback: FB chain reduces gains for downstream FB & increases system latency Some parameters can be measured with hire accuracy downstream Action: Distributed FB structure, BBF signal are sent in parallel to downstream FB FB state are exchange to one another Preprocessing at LLRF station (and incomplete) -> integral part of monitor

Thanks for your attention uTCA LLRF system (first test July 11) Example XFEL uTCA base LLRF system Calibration box of down-converter To remove slow drifts (<100Hz) Acknowledgement: LbSyn Team M. Bock, M. Bousonville, M. Felber, P. Gessler, T. Lamb, S. Ruzin, K.-H. Matthiesen, B. Schmidt, S. Schulz, … LLRF Team K. Czuba, M. Hoffmann, T. Jeyznski, F. Ludwig, W. Koprek,C. Schmidt, H. Weddig, ... Front Back 16bit ADCs 108 MHz Before you start editing the slides of your talk change to the Master Slide view: Menu button “View”, Master, Slide Master: Edit the following 2 items in the 1st slide: 1) 1st row in the violet header: Delete the existent text and write the title of your talk into this text field 2) The 2 rows in the footer area: Delete the text and write the information regarding your talk (same as on the Title Slide) into this text field. If you want to use more partner logos position them left beside the DESY logo in the footer area Close Master View Thanks for your attention Additive jitter down-converter < 1mdeg (2.1fs) Additive jitter from LO < 1.6fs (10Hz-10MHz) SNR > 80dB, Isolation > -80dB, ADC clock jitter < 200 fs => signal integrity uTCA crate !!!

LLRF SFP connections Slave TC Master TC Master Slave Previous RF station Next RF station BPM? Toroid Central unit BBF Before you start editing the slides of your talk change to the Master Slide view: Menu button “View”, Master, Slide Master: Edit the following 2 items in the 1st slide: 1) 1st row in the violet header: Delete the existent text and write the title of your talk into this text field 2) The 2 rows in the footer area: Delete the text and write the information regarding your talk (same as on the Title Slide) into this text field. If you want to use more partner logos position them left beside the DESY logo in the footer area Close Master View