Abstract
Hadron therapy motivates research dealing with the production of particle beams with $\ensuremath{\sim}100\text{ }\text{ }\mathrm{MeV}/\text{nucleon}$ energy and relative energy fluctuation on the order of 1%. Laser-driven accelerators produce ion beams with only tens of $\mathrm{MeV}/\text{nucleon}$ energy and an extremely broad spectra. Here, a novel method is proposed for postacceleration and monochromatization of particles, leaving the laser-driven accelerator, by using intense THz pulses. It is based on further developing the idea of using the evanescent field of electromagnetic waves between a pair of dielectric crystals. Simple model calculations show that the energy of a proton bunch can be increased from 40 to 56 MeV in five stages and its initially broad energy distribution can be significantly narrowed down.
Highlights
The development of particle accelerators is strongly motivated by medical applications, such as hadron therapy
In this paper we propose a compact, entirely laser-based method for both postacceleration and monochromatization of the proton beam produced by a laser-driven proton accelerator (LDPA) in order to make
An evanescent-field proton accelerator driven by singlecycle, high-field and high-energy THz pulses was proposed and analyzed
Summary
The development of particle accelerators is strongly motivated by medical applications, such as hadron therapy. In this paper we propose a compact, entirely laser-based method for both postacceleration and monochromatization of the proton beam produced by a LDPA in order to make Further substantial increase can be expected both in terms of THz pulse energy as well as peak electric field strength by using optimal pump pulse duration [23], cooling the LN crystal [23], and using the contact grating technique [24] for TPFP to allow a large pumped area It can be expected in the near future that THz pulses with mJ-level energy in the 0.1–1 THz frequency range will be available from TPFP sources driven by sub-Joule-class efficient diode-pumped solid-state lasers, making the construction of compact proton postaccelerators feasible.
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