1. Feedback and Beam Control Section (FB) Activities and Highlights 2013 Outlook presented by Wolfgang Hofle FB Section at 2013 RF Group Meeting - December 2013 1

2. 2 FB FB  “Feedbacks & Beam Control” “Low Level RF” and Transverse Feedback: 25 people in FB (20 Staff): Electronics and Control Loops Conceptual Design, Hardware, Firmware, Operation RF Group

3. FB Section at 2013 RF Group Meeting - December 2013 3 Acknowledgements: … Accelerators and Projects with FB Contributions

4. Organisation – Exploitation and Projects FB Section at 2013 RF Group Meeting - December 2013 4 Provide support for operation of the LLRF systems of existing accelerators, including Machine Supervision, Stand-by Service and Expert Support Provide Machine Development Support Design and simulations of Feedback systems Hardware and Firmware Development for Feedback Systems Contribute to conceptual design of future RF and transverse feedback systems Staff Members: 21  20 Staff 5 Students / Fellows: F.J. Galindo, T. Levens, A. Mikkelson, M. Sundal, S. Zorzetti Staff members (21) Stand-by Service for LLRF jointly with CS section

5. FB Section at 2013 RF Group Meeting - December 2013 5 LHC as p-Pb collider Successful four week LHC p-Pb run in 2013 Smooth transition between p-p and p-Pb Flexible LLRF: accelerated with separate RF, synchronization of rings at flat top LHC Transverse Feedback used at injection, ramp and during collisions for Pb and p beams Bunch trains of both rings slide against each other during acceleration, no instabilities Performance limitations dominated by IBS Excellent performance of Pb injector chain P. Baudrenghien, J. Noirjean et al.

6. FB Section at 2013 RF Group Meeting - December 2013 6 LHC - preparation of future (1) for 2015: 25 ns beam operation, beam scrubbing against e-cloud effect optimization of LLRF for 25 ns 2015 improvement of noise performance in ADT (pick-ups, cabling, electronics) Long term preparations for HiLumi era in LHC (HiLumi Project) and injectors (LIU Project) for 5x peak nominal Luminosity ADT LS1 Upgrades: New cables, new pick-ups new electronics LHC High Lumi Preparations: Example: crab cavity LLRF including SPS tests New kicker designs for transverse feedbacks (SPS-LIU) Collaboration with SLAC and INFN Frascati Mechanical Design and construction: PM Section Scrubbing beam: Bunches split: Make LLRF and TFBs work with it 1 GHz bandwidth

7. FB Section at 2013 RF Group Meeting - December 2013 7 LHC - preparation of future (2) LHC Schottky signals acquisition from RF PU Transverse Tune Diagnostics and “data mining” in ADT data Transverse instability trigger using White Rabbit (cooperation between RF, BI and CO) Improvements: SPS and LHC BQM, Bunch Length Measurement and long. Blowup Long phase modulation to reduce klystron power Long. Damper MDs and commissioning to be continued Quench Tests using ADT in February 2013 LHC Schottky diagnostics from long. PU (with BR Section) LHC Tune diagnostics from ADT (with CS Section) Quench tests with ADT: three of four Quench tests used ADT, slow and fast losses created with ADT excitation Fast Quench Test with ADT

8. FB Section at 2013 RF Group Meeting - December 2013 8 LINAC4 LLRF Functional block diagram of the Cavity Controller system Functional block diagram of the Cavity Controller system Cavity Loops module Switch & Limit module Tuner Loop module Clock Distributor module RFQ in Linac4 Tunnel RFQ commissioning with LLRF started In LINAC4 Different LLRF modules built for LINAC4 in cooperation with CS Section Racks in Faraday Cage (RFQ controller) P. Baudrenghien, F. Galindo Guarch, G. Hagmann, J. Molendijk, J. Noirjean, D. Stellfeld

9. FB Section at 2013 RF Group Meeting - December 2013 9 2.99855 GHz oscillator frequency, up- multiplication to 12 GHz Down conversion of RF signals to 400 MHz for direct digitization by National Instruments ACQ Boards Observation of signals in I/Q Prototype of analogue part A. Andersson, S. Rey, L. Timeo IF signals for NI ACQ system LLRF: Block diagram Signals on NI crate LLRF for X- Band Teststand at 12 GHz

10. FB Section at 2013 RF Group Meeting - December 2013 10 D. Valuch / M. Elias HIE Isolde LLRF 32 SC cavities Cu/Nb coated High Q, low power Low beam intensity Acceleration of radio-active ion beams Start-up in Self excited Mode (SEL mode) Lorentz-Force detuning Conditioning Flexible phasing for rapid species change LHC VME HW platform Synergy with electronics for SPS 800 MHz Feedback Hardware & Control algorithms, SM18 support

11. FB Section at 2013 RF Group Meeting - December 2013 11 P. Baudrenghien, G. Hagmann SPS – LLRF upgrades (LIU) SSB Modulator IF (I & Q) ≈25MHz Dual TxDac 16 bits RF Demodulator RF&LO mixing IF ≈25MHz 14 bits ADC Fs=4 · IF ≈100MHz 4x LO Distribution 2 x Duplex Optical Serial Links 2 in & 2 out 2Gbits/s ( ≤ 3.2Gbits/s) SRAM 2x8 Mbyte for diagnostics VME P1 backplane for slow controls & readout Dedicated backplane (P2): Power Supply Clocks Interlocks … Xilinx Virtex 5 SX SPS 800 MHz TWC prototype 11 Typical LLRF board, integration of analog and digital components  here tailored to SPS 800 MHz system

12. FB Section at 2013 RF Group Meeting - December 2013 12 Hardware for SPS LLRF Controls renovation and Ions SPS controls renovation, replacement of obsolete MMI system (with CS Section), BA3 and BA2, VTUs, Inj. Phase, Inj./Extr. Pulses  all moved to new hardware and controls BA2 Damper: new hardware to come Function Generator Module for SPS (Hardware, Firmware and Installation in Faraday cage in BA3, BA2 to come Supervision of cabling in tunnel in BA3 completed (BA2 in 2014) Preparation of SPS LSS3 for future RF upgrade (PU moved) Preparation for ions (Ar) FFA Studies and improvements of noise for ions SPS frequency program (with CS section) Noise improvements on Ion Beam Control J. Ferreira Bento, G. Kotzian, T. Levens, D. Stellfeld, U. Wehrle + CS / BR Section Function Generators installed in FC BA3

13. FB Section at 2013 RF Group Meeting - December 2013 13 M. E. Angoletta, A. Blas, R. Louwerse, J. Sanchez Quesada AD and Elena Antiprotons: Accumulation and Deceleration (Extra Low Energy Anti-Protons) Consolidation of AD LLRF, TFB, and Stochastic Cooling (+ CS and BR Section) Elena Ring: Design of LLRF and RF diagnostics Elena cycle Elena Elena and AD in the AD Hall

14. FB Section at 2013 RF Group Meeting - December 2013 14 M. E. Angoletta, A. Blas, A. Findlay, J. Molendijk (CS), J. Simonin (CS), J. Sanchez- Quesada, Six types of modules: MDDS v 2.0, ADC v3.0, DAC v 2.0, FMC-DSP-Carrier v 1.0, RTM v 2.0, VXS Switch v 2.0. VXS switch v 2.0 compatible with future B-train distribution Geared for machines with very large frequency swing Hardware for Injector Synchrotrons LLRF Baseline for: PSB MedAustron LEIR ELENA AD Application also for: Instrumentation (ELENA, AD) Future extension to other accelerators under study Successful Tests in PSB in 2013 Full deployment in PSB for start-up in 2014 Gradual migration of beams to new system Compatible with planned PSB Finement cavity system

15. FB Section at 2013 RF Group Meeting - December 2013 15 Tested basic features in view of new feedback kicker (finemet cavity)  Damping on different harmonic than detection works fine Detect at h = 13  damp with C10-11 at h = 8 Detect at h = 8  damp with C10-11 at h = 13 H. Damerau et al. Preparations for a new coupled-bunch feedback in the PS (LIU)

16. FB Section at 2013 RF Group Meeting - December 2013 16 Four new VME crates (LHC style) in building 359 (one for each tuning group) Same digital hardware also to be used for the 1TFBs on high frequency cavities and long. damper New inter-rack and under-floor cabling, controls renovation with CS section and BE-CO, PSB and PS Example: feedback for tuning group B (cavities 56, 66, 76 and 81)  After LS1: New 1-turn feedback and digital AVC loop (all 10+1 cav.) (in collaboration with IS section) H. Damerau, D. Perrelet Installation of new 1TFB on all 10 MHz cavities

17. FB Section at 2013 RF Group Meeting - December 2013 17 Safety: ESD: A very personal view LLRF05 Sweater

18. FB Section at 2013 RF Group Meeting - December 2013 18 A lot to complete for the Start-up 2014 Profit from the end of year break !