(Color online) Typical proton spectrum obtained using a 100 TW, low contrast laser, coupled to a micro-lens (Ref. 63). The figure shows a central energy of 6.5 MeV instead of the 7 MeV mentioned in the text, because for this central energy simulations were available that show a good fit between experimental and numerical data. The tunability of the microlens in terms of central energy within a range of ~10% has been demonstrated in Ref. 63.
Schematic layout of the lattice structure used for accelerating the laser-generated protons.
(Color online) SCDTL structure schematic.
(Color online) Drawing of a SCDTL module.
(Color online) SCDTL module under hot tests.
(Color online) (a) Horizontal (red straight line) and vertical (blue dashed-dotted line) envelopes and (b) energy of the reference particle along the propagation axis Z.
(Color online) Longitudinal phase space: (a) at the initial point, (b) at the SCDTL input, and (c) at the SCDTL output. The abscissa is indicated in degrees, as computed by TSTEP, the ordinate is in keV, being both normalised to the reference particle placed in the origin.
(Color online) Longitudinal phase space at the SCDTL input for an input current of 50 mA.
(Color online) Parameters at the end of the accelerating structure: Proton current transmission (i.e., output current vs input current) (red circles, left axis), output normalized emittance (blue squares, right axis).
(Color online) Total output current (red, left-sided bars in the histograms) and useful output current (blue, right-sided bars) vs the input current.
(Color online) Longitudinal phase space, phase and energy distribution at the SCDTL input for an input current of 100 mA and two drift lengths Ld : (top) 20.4 cm and (bottom) 10.4 cm.
(Color online) Longitudinal phase space, phase and energy distribution at the SCDTL output for an input current of 100 mA and two drift lengths Ld : (top) 20.4 cm and (bottom) 10.4 cm.
(Color online) Normalized energy spectrum for 100 mA input current and two different drift lengths Ld .
Parameters of the laser-generated proton beam using an ultrafast laser-triggered microlens.
SCDTL structure parameters.
Article metrics loading...
Full text loading...