1. Status of the Thomson Source
On behalf of the PlasmonX Group

2. Outline Electron Beam: Laser Beam for Thomson Source:
Parameter List and Transfer Lines layout
Laser Beam for Thomson Source:
Main Parameters and Transport Overview
Procurement Update
Basic Schedule

3. Electron Beam Parameter list
Value
Bunch charge [nC]
1-2
Energy [MeV]
28-150
Length [ps]
15-20
εn_x,y [mm-mrad]
1-5
Energy spread [%]
0.05*-0.2
Spot size at interaction point rms [µm]
5-10
*using X-band structure at gun exit

4. Electron Beam TL Schematic layout

5. Technical design
A. Zolla

6. SPARC hall Optical transfer line 0.3 PW LASER SEEDING LASER PHOTOINJ
PLASMON.X
THOMSON
HHG
DGL
PHOTOINJECTOR
UNDULATOR

7. Laser transport overview
C. Vicario, D. Filippetto

8. Laser parameters delivered to Thomson experiment
Pulse energy 6 J
Spot top hat, diameter 9 cm and aperture 13.5 cm
M2 = 1.5
Pulse length 6 ps
Max bandwidth 80 nm, central wavelength range 800 nm

9. Transport system: considerations
Long transport (< 30 m) from the compressor to the interaction chamber.
To maximize the beam stability an achromatic relay optical system and a ultrastale mount are foreseen.
To avoid absorption and distortion effects pipeline will be kept in low vacuum (10^-3 mbar) upgradeable at 10^-6 mabar for future full compressed beam transport.
Delay line for temporal overlap between laser pulse and electron beam.
High energy large aperture optics: mirrors, filters, beam samplers, achromats lenses.

10. Simulated waist vs focal and wavelength
Vacuum port
Flat mirror
Simulations with Zemax
optical design code
Extraction
Interaction
Off axis parabola
C. Vicario

11. Optical layout and simulation
Vacuum
port
plane
mirror
plane
mirror
hole
OAP
Spot size at the interaction point

12. Transverse beam envelopes at 28 MeV (Parmela simulation)

13. Thomson Interaction Region
Interaction point
Large solenoid
Laser in
Beam dump

14. Thomson Interaction Region
F. Bosi

15. A. Bacci

16. OUT (H2O)
IN (H2O)
IN current
D. Giove

17. Iron excitation and
Deflection at max energy (150 MeV)
G. Gatti

18. ℮- TL up to the two IP’s ( 1.2 M€ )
6 Dipole Magnets + PS
20 Quadrupole Magnets + PS
18 Steering Magnets + PS
Strong Focusing Solenoid +PS
Electron beam dumper + PS
Girders
Diagnostic
Controls
Vacuum……..

19. Up to now: 6 Dipole Magnets + PS 20 Quadrupole Magnets
Giunta INFN Marzo 2009
= 480 k€ (SPARC)
6 Dipole Magnets + PS
20 Quadrupole Magnets
Strong Focusing Solenoid (NTA-Mi funds 2009)
Electron beam dumper (NTA-Mi funds 2009)
20 Quad PS
18 Steering Magnets + PS
Girders
Diagnostic
Controls
Vacuum
Almost by the end of 2009
(SPARC)

20. In detail: NTA-LNF 2008: NTA-LNF 2009 = 123 k€:
1 Off axis Parabolic Mirror + 5 Silica Mirrors +1 Diode Laser → 47 k€
NTA-LNF 2009 = 123 k€:
linea di trasporto (30m) del fascio laser Flame nella sala sperimantale SPARC
lenti di focalizzazione  
viewport da vuoto  
specchi 
telecamere e fotodiodi tavolo ottico  
computer per controlli apparecchiature
movimentazioni micrometriche
attenuatori,filtri,beam splitters
materiale di consumo

21. Basic Schedule Procurement & Installation by Spring 2010
Commissioning as follow-up
Both in time sharing with SPARC operation
Laser Installation: end 2009
Laser Commissioning: end 2010