Phase Reference Line

Coordinating university or institute

Lund University,



Project description

The linear accelerator at ESS is dependent on high precision synchronization between the different acceleration stages. The stages have to be within 0.1 degree of each other at 704 MHz, which equals sub-picoseconds accuracy. One important part of achieving this is to have a highly stable time, or in this case phase, reference distribution. This is done by a thermally controlled coaxial cable where we have designed the algorithms and thermal system that keeps it to within 0.1 degree Celsius for a length of 600 meters.




Lund University, Faculty of Engineering:

  • Bo Bernhardsson, Professor
  • Björn Olofsson, Professor
  • Pontus Andersson, Master of Science
  • Rolf Johansson, Professor


  • Rihua Zeng

Core deliverables

  • Design of thermal system
  • Design of automatic control algorithms
  • Test bench and tests

Industry involvement

  • Eurotherm
  • Beckhoff
  • Pentronic AB
  • KIMA

Total budget

EUR 65,000

Procurement codes

Electronics and radio frequency
Mechanical Engineering and raw materials

Last edited