Transport beamline solutions for laseraccelerated. at ELI-Beamlines

Transcription

1 Transport beamline solutions for laseraccelerated proton beams at ELI-Beamlines Antonella Tramontana on behalf of the ELIMED collaboration Medical and multidisciplinary applications at ELI-Beamlines 100 Congresso Nazionale September 2014, Pisa

2 Outline 1.The ELIMED Project 2.The Energy Selector System 3.Beam Transport concept design 4.Summary and future perspeccves

3 ELI- Beamlines 1. The ELIMED Project 2. The Energy Selector System 3. Beam Transport concept design ELIMED is an international network built around ELIMAIA (ELI Multisciplinary Applications of laser-ion Acceleration), the ion beamline at ELI-Beamlines (Prague). Molecular & biomolecular applica8ons X- Ray sources Plasma physics e- accelera8on p+ accelera8on High- field physics The ELIMED main aim is to investigate how to control the laser-driven ion beams generated at ELI-Beamlines. Hadrontherapy application is a good candidate as demonstration-case because is the most demanding in terms of beam characteristics and performances Cirrone et al, NimA,730, 174 (2013)

4 1. The ELIMED Project 2. The Energy Selector System 3. Beam Transport concept design Control the beam characteris8cs? When laser pulses are focused on matter into ~ µm size spots extreme conditions are reached For example in the Target Normal Sheath Acceleration (TNSA) regime... Macchi et al Good Low emittance: rms emittance < 0.01 mm-mrad Short duration source: ~ 1 ps High brightness: protons/ions in a single shot (> 3 MeV) High current (if stripped of electrons): ka range <I Laser < W/cm 2 Clark et al, PRL, 84,670 (2000) Bad Divergent (~ ± 20 degrees) Broad spectrum Maximum energies: ~ 70 MeV (Scaling E ~ (I 2) 0.5 )

5 How? 1. The ELIMED Project 2. The Energy Selector System 3. Beam Transport concept design Upstream Laser beam (stability, intensity, reproducibility) Target (shape, material) Downstream Beam transport and handling (quadrupoles, dipoles...) Target Interaction point Laser Focusing system: quadrupoles Energy selection 2ND ELIMED WORKSHOP AND PANEL AIP Conf. Proc., 1546 (2013)

6 2. The Energy Selector System 3. Beam Transport concept design The Energy Selector System (ESS) Geant4.10.p02 B"(T)" Wide energy range (1-60 MeV) Posi%on'(mm)' Controlled energy spread (1-30 %) Four passive magne8c elements Opposite magne8c polarity between #2, #3 and #1, #4 dipoles Maximum magne8c field value of 8400 Gauss Integral magne8c field value of 67 Gauss Scuderi et al, NIMA, 740, 83 (2014) Tramontana et al, JNIST, 9, C05065 (2014)

7 2. The Energy Selector System 3. Beam Transport concept design Status of the experimental tests Preliminary in air test with p beam delivered by the LNS Op8c study and calibra8on with p beam delivered by the LNL Calibra8on with p beam delivered by the SMP LNS First experimental run with laser- driven p TARANIS facility (Belfast)

8 5 MeV proton beam dynamics 2. The Energy Selector System 3. Beam Transport concept design through the LNL Beam Gafchromic measurements 1 GEANT4 simulations 2 3 3rd- 4th distance = 60 mm 4 3rd- 4th distance = 67 mm

9 ESS LNS 2. The Energy Selector System 3. Beam Transport concept design Detector BEAM: 4.5, 5, 6, 10 and 12 MeV delivered by the LNS ESS CONFIGURATION: Initial collimator diameter = 3 mm, 2 mm thick Al Slit: 8 mm thick Al, 1mmx10mm aperture DETECTOR: 500 um Si, 3 and 6 mm diameter collimation systems Energy [MeV] Geant4 data [mm] Experimental data [mm] Percentage difference ±1 38.5± % 5 37±1 37.0±1.4 0% 6 34±1 34.0±1.4 0% 10 26±1 26.3± % ±1 24.5± %

10 2. The Energy Selector System 3. Beam Transport concept design 4. Summary and future perspeccves The first experimental TARANIS (I) Protons&beam& TARANIS laser characteristics Laser&beam& Laser beam (Ti:sapphire-Nd:glass) Intensity -> 1019 W/cm2 Pulse duration -> 700 fs Laser wavelength ->1053 nm Input protons beam HD cm from the target wrapped in 12um Al foil Energetic Spectrum Angular Distribution Total protons in the energy range [ ] MeV is about 1010 ppb E [MeV]! 1.1! 3.14! 4.45! 5.5! 6.42! 7.25! 8.0! Theta[ ]! 28.1! 25.3! 21.7! 17.9! 14.2! 11.7! 7.2!

11 3. Beam Transport concept design The Quadrupoles role Selected energy Fluence Dose: ESS Dose: PMQs+ESS 4 MeV (7%) 10 6 p/cm cgy 0.6 Gy Main characterisccs: 20 mm accve bore 62 mm external radius 2 short quadrupoles (40 mm length, 110T/m maximum gradient) 2 long quadrupoles (80 mm length, 114T/m maximum gradient)

12 Summary The Energy Selector System has been and successfully tested facility). 2. The ESS Geant4 simulacons output show a very good agreement with experimental data. 3. We are performing the simulacon of the whole transport beam line (preliminary cross- check with magnecc code, like Comsol and TraceWin, output)... and future perspec8ves Next experimental runs will be performed at the TARANIS facility (Belfast, UK), at LULI (Paris, Fr) and at LOA (Paris, Fr) during this year in order to test the already realized transport beam line and to start radiobiological studies (already scheduled).

13 The ELIMED collabora8on

14 Thanks for your ajen8on! A.P.