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Commissioning and Utilisation of ERLP. David Holder ASTeC, Daresbury Laboratory. Content. Introduction to ERLP; ASTeC’s contribution to ERLP; ASTeC’s plans for ERLP exploitation. ERLP. E nergy R ecovery Linac P rototype Demonstrating skills and technologies for 4GLS:

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commissioning and utilisation of erlp

Commissioning and Utilisation of ERLP

David Holder

ASTeC, Daresbury Laboratory

slide2

Content

  • Introduction to ERLP;
  • ASTeC’s contribution to ERLP;
  • ASTeC’s plans for ERLP exploitation.
slide3
ERLP
  • Energy Recovery Linac Prototype
  • Demonstrating skills and technologies for 4GLS:
    • Operation of photo injector electron gun;
    • Operation of superconducting electron linac;
    • Energy recovery from a FEL-disrupted beam;
    • Synchronisation of gun and FEL output.
parameters
Parameters
  • Nominal Gun Energy 350 keV
  • 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
slide6

Machine Status

  • Laser system nearly ready;
  • IOTs under test on site;
  • Gun ceramic – major source of delay – now expected March 2006 (~1 year late);
  • Accelerator modules arriving April/June 2005 (~6 months late);
  • 4 K commissioning Feb 06.
slide7

Gun Commissioning April to June

  • Dedicated diagnostic beamline designed by ASTeC to fully characterise the gun and benchmark the codes used for design; e.g. predicted effect of spacecharge:
slide8

booster

buncher

solenoid

Gun Commissioning April to June

Comparison and benchmarking of beam dynamics code for injectors - ASTRA and GPT

slide10

Machine Commissioning 1

  • Complete machine ready September 06;
  • Aim to demonstrate energy recovery with wiggler-disrupted beam early 2007;
  • Very challenging technical and timescale issues;
  • ASTeC has overall responsibility for successful planning and execution.
slide11

Machine Commissioning 2

Confirming suitability of TBA arc design chosen for 4GLS:

slide12

LD

LB

q

4-dipole chicane

Machine Commissioning 3

Confirming 4 dipole chicane bunch compression scheme:

slide13

Machine Commissioning 4

before FEL

  • Modeling of FEL interaction using in Genesis 1.3;
  • Major tool used for design of 4GLS sources;
  • Commissioning measurements will confirm validity of code and other calculations.

after FEL

slide14

Machine Commissioning 5

1

4

Measurements to verify start to end simulations results

3

2

First case of complete S2E modelling of an ERL with a FEL and energy recovery

slide15

Machine Commissioning 6

Operation of 2 K cryosystem - vital to operation of 4GLS

erlp exploitation 1
ERLP Exploitation 1

As an R&D exercise NOT as a user facility.

  • Accelerator test bed:
    • advanced accelerator operation, diagnostics, photocathode guns, SCRF, electron beam/laser synchronisation;
  • science
    • THz
    • X-ray (NWSF grant £2.9M, 3 years)
    • combined sources/synchronisation.
slide17

ERLP Exploitation 2

Compton backscattering X-ray source

Time resolved X-ray diffraction studies aimed at probing the mechanisms of shock compression of matter on sub picosecond (ps) timescales.

THz beamline and a tissue culture facility.

To use the ultrahigh intensity, broadband THz radiation for the study of biological systems.

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