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A reflexion on the potential evolution of the CLS machine complex : A "Gedanken" experiment

Frederic Le Pimpec, Cameron Baribeau, Tonia Batten, Grant Bilbrough, Bud Fogal, Melissa Ratzlaff, Hamed Shaker, Michael Sigrist, Xiaofeng Shen, Xavier Stragier, Ward Wurtz

TL;DR

The paper addresses the challenge of CLS remaining competitive as 4th-generation light sources emerge, by exploring how its accelerator complex could evolve beyond a conventional storage-ring upgrade. It uses a Gedanken-experiment framework that relies on CLS's existing infrastructure and knowledge to outline multiple accelerator-centric pathways, including energy-current trade-offs, emittance manipulation, linac-enabled sources, ESL capabilities, booster-lattice innovations, and other developments. These directions represent technically plausible avenues to expand CLS's capabilities and diversify its user base without committing to immediate cost-intensive upgrades. The work aims to inform strategic planning, encourage cross-institution partnerships, and demonstrate that meaningful expansion can come from instrumentation development and collaborative initiatives as much as from ring upgrades.

Abstract

In the next 5 to 10 years, new fourth generation light sources will be coming online either from upgrades or as brand new facilities. The question regarding the competitiveness and the usability of a third generation light source is certainly in the mind of the scientific personnel, which includes both the beamline and the accelerator staff of any third Gen Research Infrastructures. At the Canadian Light Source (CLS), Accelerator Operation and Development (AOD) staff are responsible for the daily operation of the machines, their upgrades which extend to long term development and shall also raise awareness on their possibilities. The boundaries of this mind experiment are 1) we must use CLS infrastructure, 2) identify the existence of the knowledge to realize an idea, 3) the realization, with whom, how, with which funds and under which administrative supervision is out of bounds.

A reflexion on the potential evolution of the CLS machine complex : A "Gedanken" experiment

TL;DR

The paper addresses the challenge of CLS remaining competitive as 4th-generation light sources emerge, by exploring how its accelerator complex could evolve beyond a conventional storage-ring upgrade. It uses a Gedanken-experiment framework that relies on CLS's existing infrastructure and knowledge to outline multiple accelerator-centric pathways, including energy-current trade-offs, emittance manipulation, linac-enabled sources, ESL capabilities, booster-lattice innovations, and other developments. These directions represent technically plausible avenues to expand CLS's capabilities and diversify its user base without committing to immediate cost-intensive upgrades. The work aims to inform strategic planning, encourage cross-institution partnerships, and demonstrate that meaningful expansion can come from instrumentation development and collaborative initiatives as much as from ring upgrades.

Abstract

In the next 5 to 10 years, new fourth generation light sources will be coming online either from upgrades or as brand new facilities. The question regarding the competitiveness and the usability of a third generation light source is certainly in the mind of the scientific personnel, which includes both the beamline and the accelerator staff of any third Gen Research Infrastructures. At the Canadian Light Source (CLS), Accelerator Operation and Development (AOD) staff are responsible for the daily operation of the machines, their upgrades which extend to long term development and shall also raise awareness on their possibilities. The boundaries of this mind experiment are 1) we must use CLS infrastructure, 2) identify the existence of the knowledge to realize an idea, 3) the realization, with whom, how, with which funds and under which administrative supervision is out of bounds.

Paper Structure

This paper contains 12 sections, 3 figures.

Table of Contents

  1. Introduction
  2. CLS a Facility Centered around its Third Generation Light Source and evolving beyond it
  3. The CLS Machine: Today
  4. The "Gedanken" experiments
  5. Lowering the Energy of the Storage Ring
  6. Emittance swap-out
  7. Linac usage
  8. Electron source and Magnet laboratories
  9. The Rings
  10. Other development
  11. Summary
  12. Acknowledgments

Figures (3)

  • Figure 1: Photon beam Brilliance comparison of CLS operating at two different setpoints, energy and circulating current
  • Figure 2: CLS linac tunnel with linac installed in room 01 and 02 a transfer line in room 3 and 4 and a possibility to branch out in room 3 to use room 09 for a short FEL or THz source
  • Figure 3: Overview of the AISTANS neutron generator facility. Neutrons are generated by injection of high energy electrons, 40 MeV into a metal target. They are then moderated and extracted as a slow beam for analyzing structural materials AISTAN_NMIJ2020