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David Holder ASTeC Daresbury Laboratory

David Holder ASTeC Daresbury Laboratory. Possible use of 4GLS for CBS. Introduction to 4GLS; Application of 4GLS to a CBS source; CBS on the Energy Recovery Linac Project (ERLP);. Outline of talk. 4GLS Daresbury. 4GLS outline and concept.

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David Holder ASTeC Daresbury Laboratory

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  1. David HolderASTeC Daresbury Laboratory Possible use of 4GLS for CBS

  2. Introduction to 4GLS; Application of 4GLS to a CBS source; CBS on the Energy Recovery Linac Project (ERLP); Outline of talk

  3. 4GLS Daresbury 4GLS outline and concept Three synchronised particle accelerators in one producing short pulses of synchrotron radiation over an unprecedented range of wavelengths.

  4. 4GLS Daresbury Three accelerators in one High-average current loop (550MeV, 100mA)XUV-FEL (750MeV, 1µA)IR-FEL (25-60MeV, 2.6mA) (both 2 mm-mrad normalised emittance)

  5. 4GLS Daresbury High-average current loop (HACL) 77pC electron bunches1.3 GHz repetition rate550 MeV Energy recovery

  6. 4GLS Daresbury XUV-FEL branch 1nC electron bunches1 kHz repetition rate750 MeV NO energy recovery

  7. 4GLS Daresbury IR-FEL branch 200pC electron bunches13 MHz repetition rate25-60 MeV NO energy recovery

  8. Highest energy – XUV-FEL Highest bunch charge – XUV-FEL Shortest bunch length – XUV-FEL Which accelerator is best for CBS?

  9. Bunch length in XUV-FEL branch 3ps (1, Gaussian), 210 MeV 270fs (rms, NON-Gaussian, 750 MeV 1.5ps (Gaussian?), 750 MeV

  10. Bunch length in XUV-FEL branch ~100fs ~10% of the bunch charge within ~100fs, giving peak current of ~1.5kA 270 fs rms bunch length

  11. Electron beam parameters XUV-FEL *Prior to final bunch compression

  12. Technical Priorities for the Energy Recovery Linac Prototype (ERLP) 1. Demonstrate energy recovery.2. Operate a superconducting linac. 3. Produce and maintain bright electron bunches from a photoinjector.4. Produce short electron bunches from a compressor. 5. Demonstrate energy recovery with an insertion device that significantly disrupts the electron beam.6. Have an FEL activity that is suitable for the synchronisation needs. 7. Produce simultaneous photon pulses from a laser and a photon source of the ERLP that are synchronised at or below the 1ps level.

  13. ERLP Parameters • Nominal Gun Energy 350keV • Injector Energy 8.35 MeV • Circulating Beam Energy 35 MeV • Linac RF Frequency 1.3 GHz • Bunch Repetition Rate 81.25 MHz • Max Bunch Charge 80 pC • Max Average Current 13 µA

  14. ERLP Layout

  15. Construction status

  16. CBS on ERLP

  17. Comparison of CBS on 4GLS and ERLP

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