Bunch-to-Bucket Transfer System

b2b logo.png

This work package was frozen due to missing or redirected personnel for about two years

The purpose of the Bunch-to-Bucket (B2B) transfer system is to transfer ion beams over the whole range of isotopes from one ring to another at GSI and FAIR. It employs the so-called phase-shift or frequency beating methods to achieve a phase match between bunch and bucket to better than 1 degree. The Bunch-to-Bucket (B2B) Transfer System is essential and indispensable for the FAIR accelerator chain. Without, no beam can be transferred from SIS18 to SIS100 and to follow-up machines. The B2B system is realized by the General Machine Timing (GMT) system and the Low-Level RF (LLRF) system. The B2B system is closely linked to other systems like kicker control and electronics as well as the machine protection system.


The aim of this web is to provide an overview on the Bunch-to-Bucket transfer system and its relationship to other systems. Moreover, it is the central point for documentation. Please note, that the B2B transfer system is still under development.



  • till 30-Oct-2020: proof-of-principle; setup installed in kicker rooms (SIS, ESR)
  • till 30-Oct-2020: proof-of-principle; trigger electronics in kicker rooms (just electronics, no magnets)
  • till 27-Nov-2020: proof-of-principle; trigger extraction (SIS) and injection (ESR) kicker without beam
  • till 30-Jun-2021: proof-of-principle; trigger extraction (SIS) and injection (ESR) kicker with beam


  • 23-Dec-2019: proof-of-principle phase matching (using frequency beats) in RF supply room, see here
  • 12-Jun-2019: proof-of-principle phase matching (using frequency beats) on office table, see here
  • 11-Mar-2019: very little personnel: some conceptual work (maybe)
  • 04-Jul-2017: no personnel: work package frozen
  • 09-Mar-2017: request for new Workpackage approved
  • 28-Feb-2017: technical concept released (EDMS)
  • 13-Feb-2017: created this wiki
  • 26-Jan-2017: new Workpackage B2B (Bunch-to-Bucket) Transfer System requested
  • 10-Feb-2016: B2B Project steering meeting established


BunchBucket Web Utilities

-- DietrichBeck - 17-Oct-2020
Topic attachments
I Attachment Action Size Date Who Comment
b2b_logo.pngpng b2b_logo.png manage 22 K 17 Oct 2020 - 11:03 DietrichBeck first unofficial logo with transparent background
Topic revision: r12 - 17 Oct 2020, DietrichBeck
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