DACTOMUS project
In the context of CILEX, we have set up and tested a magnetic transport line made of triplet of quadrupoles to transport and focus the beam 1m away from the electron source. It has been designed by CEA-IRFU and issued from a close collaboration with partners of the Plateau de Saclay (LPGP, LAL, LLR, CEA-IRFU). The primary goal is to accurately diagnose an electron beam in the region of 70MeV, and then, to transport and stabilize the beam away from the generation point. In the context of a multi-stage scheme, it’s mandatory to be able to work with an electron beam stable in position and to optimize the charge at the injection point in the second stage (the accelerator stage).
The mechanical ensemble is presented in figure 1.
Figure 1 : triplet of quadrapoles
A typical spectrum recorded after the transport line, with a dipole in addition to the quadrupole triplet is reported on figure 2. As expected from the specifications of the ensemble, the spectrum exhibits a pinch around 70MeV, maximizing the charge density in this region.
Figure 2: typical image recorded after the magnetic transport line and dipole for spectral analysis
Reference :
"Transport and analysis of electron beams from a laser wakefield accelerator in the 100 MeV energy range with a dedicated magnetic line"
Maitrallain A, Audet TL, Dobosz Dufrénoy S, Chancé A, Maynard G, Lee P, Mosnier A, Schwindling J, Delferrière O, Delerue N, Specka A, Monot P et Cros B, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment., November, 2018. Vol. 908, pp. 159-166, (2018).
Funding :
Collaborators :
- CEA-IRFU (A. Chancé, O. Delferrière), LPGP (B. Cros, G. Maynard, T. Audet), LLR (A. Specka),
- LAL (N. Delerue)
