Current Systems Wolfgang Hofle Acknowledgements: RF group, Section - PowerPoint PPT Presentation

W. Hofle - RF+Dampers - R2E and Availability Workshop 14-17 OCtober 2014 RF and Transverse Dampers Current Systems Wolfgang Hofle Acknowledgements: RF group, Section Leaders and Deputies Special Thanks to L. Arnaudon, P. Baudrenghien, A. Blas, T. Bohl, A. Butterworth, H. Damerau, F. Gerigk, P. Maesen, E. Montesinos, M. Paoluzzi, C. Rossi, D. Valuch, U. Wehrle Disclaimer: 15 minutes to cover … 2035 1

Accelerators and Projects involving RF (1) W. Hofle - RF+Dampers - R2E and Availability Workshop 14-17 OCtober 2014 Name LHC / LHC Radiation Particle Type of R2E known / Mitigation injector from exposed expected electronics LINAC2 yes - p - no R2E issues - expected LINAC3 yes Beam losses Ions (Ar, PLC, D, A, P no R2E issues Study advised ? Pb , …) expected for Pb Relocation ? radiation levels with Ar are high LINAC4 yes Cavity H- A no R2E issues/risks New type of arc detector Conditioning being deployed, rad tests ? except arc detectors AD, ELENA no Cavity pbar - no R2E issues - conditioning expected LEIR yes - ions - no R2E issues - expected HIE-Isolde, no Cavity ions - no R2E issues - Isolde conditioning expected CTF3/CLIC no e- (e+) PLC, A, D ? no planned activities known Types of electronics: PLC, analogue (A), digital (D), RF power (P) 2

Accelerators and Projects involving RF (2) W. Hofle - RF+Dampers - R2E and Availability Workshop 14-17 OCtober 2014 Name LHC / Radiation Partic Type of R2E known / Mitigation from le exposed expected p-LHC electronics injector PS Booster yes Beam losses p A, P R2E solid state study / development amplifiers ongoing (M. Paoluzzi et al.) pick-up electronics (RF) PS yes Beam losses p , A, P R2E: solid state study for finemet cavity for Ions amplifiers long damper pick-up electronics shielding 40 MHz / 80 MHz (BI) drivers SPS yes Beam losses p, A, P R2E: solid state upcoming stud, Ions amplifiers measurements and tests pick-up / beam for Highbandwidth observation Feedback system: solid electronics state amplifiers LHC yes Beam loss, p, PLC, A, D, P arc detector study advised for HiLumi: cavity Ions electronics and calculations, conditioning in HiLumi era measurements, tests, (tunnel) relocation Beam observation (tunnel+UX45) (tunnel+UX45) Types of electronics: PLC, analogue (A), digital (D), RF power (P) 3

RF waveguide Arc Detector (1) protects W. Hofle - RF+Dampers - R2E and Availability Workshop 14-17 OCtober 2014 spurious triggers rad damage  transmission line system Photo-diode Optical Waveguide  sensitive RF elements (ceramics, ferrites) amplifier fibre port  based on optical detection Waveguide current system currently deployed system in LHC Detector logic  optical fibers suffer radiation damage  interlock logic to mitigate spurious Interlock Test Detector triggers put in place, no more problem in lamp view angle 2 nd channel 2012 run Detector Waveguide Photo-diode view angle port amplifier new system, being deployed in LINAC4 Waveguide new system gradually to be migrated to LHC  no fibers  four redundant detectors, voting logic  “sun glasses” to blind -out showers Interlock  future rad testing envisaged Optional external logic to level expected for HiLumi  needs to be in tunnel D. Valuch et al.  alternative: acoustic detector This is also a Technology Transfer Project 4

RF waveguide Arc Detector (2) W. Hofle - RF+Dampers - R2E and Availability Workshop 14-17 OCtober 2014 logic box detector box  new arc detector deployed in LINAC4  reliability testing in LINAC4  many outside labs expressed interest  manufactured in industry under license  future radiation testing envisaged  need estimate of dose rate in tunnel for HiLumi era close to cavities 5

Solid state amplifiers for Finemet Cavities PSB RF and PS long. damper (1) W. Hofle - RF+Dampers - R2E and Availability Workshop 14-17 OCtober 2014 1000 G a p X C Ω 100 2 cores 3 cores 1 core Freq [Hz] 10 1.E+05 1.E+06 1.E+07 1.E+08 R F n i  “ Finemet ” is a magnetic alloy  series of ceramic gaps  high permeability  powered by individual  potential to replace ferrite based cavity amplifiers systems in injectors by wideband systems  modular design without need for a tuner  fast feedback requires proximity to cavity and beam LIU project proposes:  electronics exposed to  a finemet based system for PSB radiation (replacing the C02 and C04 RF tetrode systems) „ Finemet Review“ 9 -10 September 2014 (LIU)  a wideband long. damper for PS http://indico.cern.ch/event/315998/timetable/#20140909.detailed M. Paoluzzi et al. 6

Solid state amplifiers for Finemet Cavities PSB RF and PS long. damper (2) W. Hofle - RF+Dampers - R2E and Availability Workshop 14-17 OCtober 2014  design of amplifier in house at CERN  based on experience with transistor in similar applications  drift of bias characteristics compensated by circuit to mitigate ageing by radiation  radiation tests at JPARC (Japan) and Fraunhofer Institut in Germany • integrating effect of radiation  solution with Shielding has been studied • compensating circuit being tested and deployed for SS02 in PS  t ube amplifier would be alternative … cavity but design with many gaps adapted to solid state amplifiers  tubes used in LEIR and JPARC (Japan)  collaboration with JPARC for solid state system amplifiers shielding PS SS02 for long. damper „ Finemet Review“ 9 -10 September 2014 (LIU) 7 http://indico.cern.ch/event/315998/timetable/#20140909.detailed

Solid state amplifiers for PS-RF (40 MHz & 80 MHz) W. Hofle - RF+Dampers - R2E and Availability Workshop 14-17 OCtober 2014 Annexes for electronics And feedback amplifiers 8

Solid state amplifiers for PS-RF (40 MHz & 80 MHz) W. Hofle - RF+Dampers - R2E and Availability Workshop 14-17 OCtober 2014 Doses in Gy Equipment of SS77 System PreDriver Year Annex SS77 Driver Power Supply Ring Interface 4.8 2007 9.6 5.5 0 14 2008 24 23 20 6.43 2009 10.0 10.2 10 8 2010 11 11 8 Equipment of SS78 System PreDriver Year Annex SS78 Driver Power Supply Ring Interface 14 2007 11 11 13 37 2008 39 39 45 20 2009 17.5 16.1 20.5 22 2010 12 15 13 � 9

Solid state amplifiers for PS-RF (40 MHz & 80 MHz) W. Hofle - RF+Dampers - R2E and Availability Workshop 14-17 OCtober 2014 Shielding put in place (LS1) 10

Pick-up electronics in tunnel (PSB, PS, SPS LSS3) W. Hofle - RF+Dampers - R2E and Availability Workshop 14-17 OCtober 2014 PSB (RF resp.) head amplifiers transverse feedback RF loops regular maintenance PS (BI resp.) head amplifiers transverse feedback RF loops SPS LSS3 Beam observation equipment, RF pick-ups if re-design more rad. Example: SPS pit equipped with monitoring may be needed to Beam Observation equipment get levels for specifications in SPS LSS3 (U. Wehrle) 11

Pick-up electronics in tunnel (SPS Damper LSS2) W. Hofle - RF+Dampers - R2E and Availability Workshop 14-17 OCtober 2014 electro-static PUs with high impedance preamplifiers in tunnel LS1: electronics moved from 208, 209 , 210, 211 to newly installed PUs at 202, 204, 205, 207 all checked and repaired (R. Louwerse/G. Kotzian) spare electronics remains in tunnel (hot spares) pit equipped with damper electronics @212, 213, 214, 215 for fixed target beam, very reliable & robust (20+ years) (future renovation envisaged, outside LIU scope) rad monitoring radiation 100 MHz bandwidth, discrete transistors before redesign ? power supplies need regular changing 12

High bandwidth Feedback Solid State Amplifiers in LSS3 of SPS (1) W. Hofle - RF+Dampers - R2E and Availability Workshop 14-17 OCtober 2014 tunnel  R&D project to demonstrate damping of headtail motion in SPS (e.g. ecloud)  funded by LARP and LIU SPS  decision in 2016 on full deployment  solid state amplifiers 4x100 W installed since 2011 under QD319  driving BPW pick-up as kicker  radiation damage to power supply mitigated by change of power supply  powering of amplifiers only during MDs 13

High bandwidth Feedback Solid State Amplifiers in LSS3 of SPS (2) W. Hofle - RF+Dampers - R2E and Availability Workshop 14-17 OCtober 2014  new amplifiers for next stage  jointly with SLAC selected amplifiers from R&K Japan (4x200 W)  Installation in tunnel to power new kickers  radiation measurements ongoing to decide on installation location  later stage (>2016) if full system deployment  more amplifiers  need for proper radiation measurements, testing, calculations, started new stripline kickers in 321 existing amplifiers (QD319) 14