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        <title>Frontiers in Physics | Accelerator Physics section | New and Recent Articles</title>
        <link>https://www.frontiersin.org/journals/physics/sections/accelerator-physics</link>
        <description>RSS Feed for Accelerator Physics section in the Frontiers in Physics journal | New and Recent Articles</description>
        <language>en-us</language>
        <generator>Frontiers Feed Generator,version:1</generator>
        <pubDate>2026-09-10T07:20:35.593+00:00</pubDate>
        <ttl>60</ttl>
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        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1864732</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1864732</link>
        <title><![CDATA[Scaling of 3D printed microstructured targets in the multi-ps, quasi-relativistic regime for high-flux laser-driven ion acceleration]]></title>
        <pubdate>2026-09-03T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>R. Simpson</author><author>E. Grace</author><author>A. J. Kemp</author><author>J. Luoma</author><author>N. Lemos</author><author>A. Haid</author><author>D. Mariscal</author><author>J. Gama</author><author>S. Faubel</author><author>J. Sicard</author><author>S. Tochitsky</author>
        <description><![CDATA[Laser-driven ion acceleration has emerged as a promising technique for producing high-flux, energetic proton beams for applications in high-energy-density science, radiography, and inertial fusion energy concepts like ion fast ignition. Recent advances in target fabrication, notably the use of 3D-printed microstructured arrays with graded density profiles, have demonstrated significant improvements in proton energy and conversion efficiency compared to conventional flat foils, particularly in the highly relativistic laser regime. In this work, we present a detailed experimental scaling study of laser-driven ion acceleration using log-pile microstructured targets in the quasi-relativistic, multi-picosecond regime. Experiments were conducted at the OMEGA-EP facility, utilizing short-pulse laser beams with energies up to 1250 J, pulse durations ranging from 0.6 to 10 ps, and focal spot sizes from 14 to 50 μm, corresponding to normalized vector potentials a0 from approximately 0.7–9.2. Target parameters, including micro-wire diameter (0.5-1 μm) and total thickness (10-50 μm), were systematically varied. Proton spectra and beam profiles were characterized using radiochromic film stacks, while electron spectra were measured with a magnetic spectrometer. Our results show that ion performance metrics such as the maximum proton energy and conversion efficiency scale strongly with target parameters including the target average density. These findings provide important scaling relationships for optimizing target design and laser parameters in future high-flux, laser-driven ion acceleration experiments.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1849759</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1849759</link>
        <title><![CDATA[Hot electron model for ion emission (Hermione): an effective model for target normal sheath acceleration ion spectra from femtosecond to picosecond lasers]]></title>
        <pubdate>2026-08-31T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>C. L. C. Lacoste</author><author>N. Iwata</author><author>M. Bardon</author><author>E. D’Humières</author><author>Y. Sentoku</author><author>P. Antici</author>
        <description><![CDATA[Recent advances in high-power lasers for secondary particle generation highlight the need for reliable and affordable particle sources. In laser-driven ion acceleration, the most routinely obtainable acceleration mechanism is the so-called Target Normal Sheath Acceleration (TNSA) mechanism. Predicting the characteristics of particle sources produced through this mechanism is essential for modeling experiments at existing and future laser facilities. In this work, we present a versatile and fast predictive model, Hermione, capable of reproducing proton spectra across several laser facilities, including the laser facilities PETAL, Apollon, LFEX, and ALLS. Our results show very good agreement with experimental data for laser pulses longer than 100 fs, while a slight overestimation of the proton yield is observed for shorter pulses (<100 fs). We also demonstrate the model’s ability to reproduce wavelength-dependent effects for lasers operating between 0.8 μm and 2 μm. Hermione delivers results on very short timescales (less than 1 minute on a standard laptop), making it an efficient complementary tool to more complex and computationally demanding Particle-In-Cell (PIC) simulations. This enables rapid optimization of the TNSA acceleration regime by varying laser energy, pulse duration, and focal spot size. The code is open access, allowing the community to refine and adapt it to specific applications.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1810309</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1810309</link>
        <title><![CDATA[Design of a compact RFQ with low longitudinal emittance for the SESRI project]]></title>
        <pubdate>2026-05-29T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Zhongshan Li</author><author>Xuejun Yin</author><author>Jiancheng Yang</author><author>Fu Ma</author><author>Guangxian Li</author><author>Liangzhou Yao</author><author>Shuang Ruan</author><author>Guodong Shen</author><author>Guoxin Chen</author><author>Nan Yuan</author><author>Mengxue Li</author><author>Yaqing Yang</author><author>Peng Yang</author><author>Mengxin Xu</author><author>Xiaoni Li</author><author>Youjin Yuan</author><author>Jiawen Xia</author>
        <description><![CDATA[The Space Environment Simulation and Research Infrastructure (SESRI) was proposed in China to support space science research in material physics, biophysics, and interdisciplinary studies. A compact radiofrequency quadrupole (RFQ) accelerator with low longitudinal emittance has been designed and constructed as one of the key components of the SESRI. This RFQ, operating at 108.48 MHz, accelerates heavy ions with mass-to-charge ratios of 2 ∼ 6.53 from 4 keV/u to 300 keV/u. Two innovative beam dynamics strategies, including the adiabatic capture design and the equal separatrix-area technique, were employed to effectively tackle critical challenges in longitudinal emittance control and cavity length reduction. The adiabatic capture design ensures that the rate of change of the separatrix area is significantly smaller than the synchrotron angular frequency, ωs, thereby mitigating emittance dilution and reducing the output longitudinal emittance. The equal separatrix-area technique maintains a constant normalized separatrix area, minimizing the length of the buncher section. Furthermore, the transverse acceptance at the intersection between the buncher section and the accelerator section was optimized to ensure high transmission efficiency during practical operation. The results of error analysis indicate that this design provides enough margin for actual operation.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1801035</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1801035</link>
        <title><![CDATA[Laser intensity scalability analysis for p-B11 fusion via microbubble implosion]]></title>
        <pubdate>2026-04-13T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>Vittorio Ciardiello</author><author>Daniele Davino</author><author>Vincenzo Paolo Loschiavo</author>
        <description><![CDATA[Microbubble Implosion (MBI) is an emerging concept in laser-matter interaction that utilizes ultra-high intensity laser (UHIL) pulses to trigger the collapse of micrometric spherical cavities, achieving extreme matter densities. This mechanism offers a promising new pathway to reach nuclear fusion reactions and target the production of alpha particles. A critical factor in MBI efficiency is the interplay between cavity geometry and laser intensity. This study investigates this correlation through numerical simulations using a Particle-In-Cell (PIC) code. The findings characterize the fundamental scaling laws and basic properties of the implosion, providing a framework essential for the design of upcoming experimental campaigns.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2026.1790944</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2026.1790944</link>
        <title><![CDATA[The design of a compact conduction-cooling system for SRF material characterization]]></title>
        <pubdate>2026-03-30T00:00:00Z</pubdate>
        <category>Methods</category>
        <author>Gai Wang</author><author>Yue Zhang</author><author>Zhongxiang Xu</author><author>Shengwen Quan</author><author>Manqian Ren</author><author>Zeqin Yao</author><author>Fang Wang</author><author>Ziyu Wang</author><author>Shichuan Ding</author><author>Jun Tao</author>
        <description><![CDATA[The precise and efficient testing of the RF performance of superconducting radio frequency (SRF) samples under superconducting conditions serves as the fundamental support for developing new SRF materials. The traditional SRF material RF performance testing systems have technical bottlenecks such as strong dependence on liquid helium, long testing cycles, and high operating costs. In this paper, the design and Multiphysics simulation analysis of a novel conduction-cooling RF performance testing system for SRF materials are presented. The system is numerically predicted to achieve 50 mT and nΩ-level measurement of the surface resistance (Rs) without liquid helium cooling. The core part of the system is an optimized mushroom-type sample host cavity, which operates primarily in the 3.9 GHz TE011 mode, with a sample radius of 33 mm. A Nb3Sn coating on the inner cavity surface is proposed in the design to lower microwave loss, and the entire conduction-cooling structure is engineered and analyzed numerically. Additionally, the resolution and measurement range of Rs are systematically evaluated via Multiphysics simulations, showing the potential of the design for low-cost, high-quality SRF material characterization.]]></description>
      </item><item>
        <guid isPermaLink="true">https://www.frontiersin.org/articles/10.3389/fphy.2025.1567622</guid>
        <link>https://www.frontiersin.org/articles/10.3389/fphy.2025.1567622</link>
        <title><![CDATA[ELIMAIA-ELIMED: a new user platform for radiobiological research utilizing laser-driven protons]]></title>
        <pubdate>2025-04-23T00:00:00Z</pubdate>
        <category>Original Research</category>
        <author>P. Bláha</author><author>K. M. Prise</author><author>M. Borghesi</author><author>F. P. Cammarata</author><author>R. Catalano</author><author>P. Chaudhary</author><author>G. A. P. Cirrone</author><author>M. Davídková</author><author>D. Doria</author><author>G. I. Forte</author><author>F. Grepl</author><author>K. Hideghéty</author><author>V. Istokskaia</author><author>L. Manti</author><author>A. McCay</author><author>M. Navrátil</author><author>J. Novák</author><author>A. Pappalardo</author><author>G. Petringa</author><author>G. Russo</author><author>G. Schettino</author><author>F. Schillaci</author><author>E. R. Szabó</author><author>P. Szotkowski</author><author>M. Tryus</author><author>L. E. Vannucci</author><author>V. Vondráček</author><author>D. Margarone</author><author>L. Giuffrida</author>
        <description><![CDATA[The ELIMAIA-ELIMED beamline, powered by the L3 HAPLS petawatt laser, enables the irradiation of biological samples with intermediate-energy laser-driven protons (LDP) in a multi-shot regime. In the pilot radiobiological experiment, protons with a mean energy of ∼24 MeV and doses up to ∼14 mGy per shot, with ∼4 ns bunch duration, were used to irradiate AG01522 normal human skin fibroblasts. The shortest irradiation time achieved was down to ∼17 min/Gy, while the mean and peak dose rates reached ∼1 × 10−3 and 3.5 × 106 Gy/s, respectively. The cells were exposed to doses ranging from ∼0.4 to 1.5 Gy and analyzed for DNA damage, with double-strand breaks visualized as 53BP1 foci. Despite the differences in shot exposures between the multi-shot LDP and the previous experiments (at other facility) with single-shot LDP, similar DNA damage responses were observed. Results with conventionally accelerated protons align closely with the corresponding single-shot LDP samples. These experimental results were achieved as part of the flagship experiment FLAIM (within the IMPULSE EU-funded project) and serve as an initial demonstration of the ELIMAIA-ELIMED platform’s potential for advanced radiobiological research, creating new opportunities for such studies utilizing laser-driven ion sources.]]></description>
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