Performance of solenoids vs. quadrupoles in focusing and energy selection of laser accelerated protons

Abstract

Using laser accelerated protons or ions for various applications - for example in particle therapie or short-pulse radiographic diagnostics - requires an effective method of focusing and energy selection. We derive an analytical scaling for the performance of a solenoid compared with a doublet/triplet as function of the energy, which is confirmed by TRACEWIN simulations. The scaling shows that above a few MeV a solenoid needs to be pulsed or super-conducting, whereas the quadrupoles can remain conventional. The transmission of the triplet is found only 25% lower than that of the equivalent solenoid. Both systems are equally suitable for energy selection based on their chromatic effect as is shown using an initial distribution following the RPA simulation model by Yan et al.\cite{yan2009}.

Submitted to Phys. Rev. ST Accel. Beams

References in corpus (1)

• Radiation Pressure Dominate Regime of Relativistic Ion Acceleration

Cited by in corpus (2)

• Technologies for Delivery of Proton and Ion Beams for Radiotherapy
• Generation of quasi continuous-wave electron beams in an L-band normal conducting pulsed RF injector for laboratory astrophysics experiments