LIU Highlights 2015 W Hofle BERFFB LIU Highlights

LIU Highlights 2015 - W. Hofle - BE-RF-FB LIU Highlights in 2015 SPS Damper, High Bandwidth Feedback, LLRF Summarized by Wolfgang Hofle BE-RF-FB 8 December 2015

SPS Damper Signal processing Modules, aka. Damper. Loops: q LIU Highlights 2015 - W. Hofle - BE-RF-FB • • 6 commissioned damper modules (p. LHC, p. FT, doublet beam); improvements under way 2 Experimental (for development) 2 Ions modules, in preparation for 2016 Observation Box: Prototyping: server installed, signalling already running with test crate Damper Power system q • • Excellent availability during 2015 Special thanks to colleagues from RF-PM! Damper also running for ions for LHC q • • increasing the transmission efficiency and permitting to run at 175 ns batch spacing in the SPS instead of 225 ns increasing the luminosity in LHC significantly; tested also 150 ns using currently the p. LHC hardware (new hardware for ions foreseen to be commissioned in 2016) Emittances OK Damping at 225 ns batch spacing Emittances OK Damping at 150 ns batch spacing

Data recording: Observation Box Objective: Overcome limitation of VME for data transfer to fully explore diagnostic potential of the digital LLRF systems (LLRF 400 MHz + ADT + SPS Damper) Data to come next year LIU Highlights 2015 - W. Hofle - BE-RF-FB VME modules with integrated Transmitters LHC / SPS /. . Transmitter Fiber 4 x 1 / 2. 5 Gb/s Computer in TN OP application Java RDA 3 Super. Micro’s Super. Server 6028 U-TR 4+ Observation Box SPEC Driver Stack PCIe (DMA) RAM GPGPU Ethernet Linux kernel syscalls & sysfs Obs. Box class CUDA/Open. CL FESA 3 RDA 3 CMW Simple PCIe FMC carrier (SPEC) RF specific firm ware: T. Levens

LIU Highlights 2015 - W. Hofle - BE-RF-FB High Bandwidth Transverse Feedback q MDs with strip-line and new power amplifiers q Second strip-line to be equipped with power amplifiers in YETS; amplifiers delivered q Progress with slot-line and modified (Cu pin) feedthroughs • Plan: Have slot-line ready for lab measurements for 2016 review; decide on installation in EYETS mid 2016 q SLAC team advances with firmware for bunch train operation q Upcoming US-LARP meeting at SLAC, discussing adding a day for the feedback discussion; need approval of CERN particpation q Date set for the 2016 review

SPS LLRF LIU Highlights 2015 - W. Hofle - BE-RF-FB q 200 MHz • • Functional specifications drafted Budget and effort estimated Contributions to design report (ions) Collaboration with Themis Mastoridis and Claudio Rivetta on conceptual design of loops for 200 MHz and 800 MHz LLRF q 800 MHz • Start-up 2016 with both cavities equipped with the new LLRF

LIU Highlights 2015 - W. Hofle - BE-RF-FB SPS 800 MHz – Progress LLRF Two crates ready for 2016 start-up RF Function Generator

800 MHz Polar Loop – Phase Noise Reduction: Results LIU Highlights 2015 - W. Hofle - BE-RF-FB Polar Loop OFF: • 1. 5 deg pk-pk • High Voltage ripple (50 Hz, 300 Hz) 1 m. V/div 5 ms/div Polar Loop ON: • 0. 4 deg pk-pk • High frequency noise only (> BW) 1 m. V/div 5 ms/div 2 travelling cavities 4 x 60 k. W IOT amplifiers per cavity (Surface)