1. Injector II Low Level RF & Interlock – Status
Thomas Schilcher

2. Injector II Low Level RF – Strategy
required systems
LLRF systems for 50 MHz cavities (cav. 2+4 (date to be defined), long term: cav. 1+3)
RF interlock systems (cav. 2+4 (date to be defined), long term: cav. 1+3)
present status LLRF & ILK
cav. 1+3: 50 MHz systems; cav. 2+4: 150 MHz systems
LLRF system:
analogue A/φ-controller, analogue tuning system;
many electronic components obsolete;
controls interface: basic access (ACS)
ILK system: home built PLC system (“Ruedi-SPS”)
strategy
build systems on platforms developed for SwissFEL (reengineering of analogue system requires equal manpower as development based on new SwissFEL type system use synergy also for maintenance)
full integration into EPICS (standard SW distribution, GUIs, archiver, alarm handler, etc.) A φ
Tuning
ILK

3. Injector II Low Level RF
concept: LLRF system
digital LLRF system based on IFC1210 digital processing board + FMC ADC/DAC mezzanine boards
direct sampling of RF signals (50 MHz) with 16bit ADCs, max. 250 MSPS (no down-conversion required, only signal conditioning necessary + clock generation & vector modulator)
adapt SW/FW to CW operation
concept: ILK system
modular system
basic structure identical to SwissFEL ILK system
adapt SW/FW to specific needs
IFC1210
ADC
DAC
ADC
DAC

4. Injector II Low Level RF – Upgrade
pre-requisite for LLRF / ILK upgrade: basic LLRF / ILK system infrastructure ready for SwissFEL: earliest start: 2nd half of 2013
status year 2012: 70-75% of LLRF manpower for SwissFEL (to be continued for the next ~4 years) presently no manpower available for injector II LLRF / ILK upgrade
required additional manpower for HIPA injector II LLRF / ILK implementation for cav. 2 & 4 before 2017: 1x electrical engineer for ~3 years (LLRF / ILK SW/FW adaption, RF front-end for signal conditioning, test, installation and commissioning management, etc.) alternative: start injector II LLRF / ILK system development in 2017