1. EUPRAXIA-PISA JUNE 2016 e-Beam-Laser
M. Artioli, G. Dattoli, F. Nguyen and S. Pagnutti

2. We are trying to go Towards «Bonsai» FEL

3. Whatever we do…oscillators, SASE…

4. Get a fast and reliable description embedding the beam with the «laser environment»

6. Fel benchmarking-codes Genesis, Prometeo, Medusa, Perseo

7. What are the elements characterizing a FEL
A) Gain
B) Saturation intensity
C) output radiation

8. GAIN
Def.

9. …
gain

10. Energy Spread, emittance … Gain reduction effects

11. FEL-oscillator dynamics
We can adjust power in this way
electrons
photons
short undulator
Gain and output power dependance!

12. Round Trip evolution
The FEL Intracavity evolution can be characterized using formulae closely symilar to those of conventional laser devices

13. SASE-PIVOTAL –PARAMETERS Pierce parameter and Gain length

14. SASE & HARMONIC GENERATION

15. Segmented undulators

16. Exotic undulators, Biorthogonal, Tapered…

17. FEL-short pulses Gain and output power dependance! short undulator
electrons
photons
short undulator
Gain and output power dependance!

18. Very Short pulses,Single spike, slippage dominance
P SP = 1.−𝑒𝑥𝑝 −1.7 𝜋 𝜇 𝑐 𝑃 𝐹
𝑁 𝑢 =400, 𝜆 𝑢 =2.8 𝑐𝑚, 𝐾=2.14,
𝐸=123.9 𝑀𝑒𝑣, 𝐼 𝑒 =265.6 𝐴, 𝜎 𝜖 =1.3∙ 10 −3 ,
𝜀=0.4 𝑚𝑚∙𝑚𝑟𝑎𝑑, 𝛽=2.0
𝜎 𝑏 =4.5 𝜇𝑚 𝜌 𝑑 =6.2 (−3)
𝜆 𝑠 = 𝜇 𝑚

19. Summary of what has been done WP6
A) Set up of the PARSIFEL code
B) Study of FEL single spike operation (Numerical)
C) Case study Parsifel & beam accelerated parameters
D) Beam transport and large emittance spread
E) Transverse Gradient Undulators
F) Hiring with EUPRAXIA funds

20. Beam Transport Large energy spread

21. WP6 slide: from F.Nguyen & G. Dattoli
In advanced phase
Simulation & Modeling Tools benchmarking: comparison among different semi-analytical and full numerical FEL codes (see also the presentation from G.Dattoli & M.Artioli)
FEL power growth comparison between two cases (blue, such as SPARC, red, with LWFA)
WP6 present core task
Report on the state-of-the-art short period undulators and case studies on undulators based on novel technologies: simulation and design
Assi sul grafico?!?!?!?
Synergies with WP5
Joint study of the beam parameters, extraction and manipulation  their impact on the FEL power growth

22. TGU
Field distribution

23. Single spike operation and scaling relations