摘要
粒子加速器极大地推动了近代科学的发展。目前成熟的射频加速方案受限于不足100 MV/m的加速梯度,面临造价高、占地面积广、建设周期长等挑战,同时也限制了其在一些领域的应用和推广。因此,寻求新型的电子加速技术已成为加速器领域的重要研究方向。在更高频率的太赫兹和光频波段,太赫兹波导加速和电介质激光加速技术能够提供高达GV/m量级的加速梯度,近年来已相继实现了对非相对论和相对论电子的加速及相空间操控(如脉宽压缩、空间聚焦等),并演示了级联加速方案,为实现小型化的集成加速器奠定了基础。未来,集成加速器有望在实验室范围实现大型射频粒子加速器的功能,并引起物理、化学、生命科学、医学等多学科领域的突破。为更好地把握集成电子加速器的发展,梳理了从太赫兹波到光波驱动的电子加速研究进展,介绍了相干电子源和束流控制的相关技术,并进一步展望了新型集成加速器的研究和应用。
Significance Particle accelerators are scientific facilities that utilize electromagnetic waves to accelerate charged particles to speeds close to that of light.Over the last century,accelerator development has contributed significantly to the advancement of science,particularly for the investigation of microscopic constituents that comprise macroscopic matter,and broader application communities such as the construction of advanced light sources,material science,and medical therapy.Conventionally,radio frequency(RF)is employed to power mature accelerators.However,this acceleration scheme is constrained by an acceleration gradient of 100 MV/m and encounters challenges such as high price,significant footprint,and a lengthy construction time,all of which impede its promotion for wider scientific and technological applications.As a result,the search for new electron acceleration technologies has intensified in the pursuit of advanced accelerators.To reduce accelerator size,increasing operation frequency provides an effective path for enhancing accelerator performance and availability.In such cases,energy transfer from electromagnetic waves to electrons can occur over shorter distances,resulting in larger accelerating gradients and a smaller device footprint.In particular,contrary to the long wavelength associated with RF,electron acceleration driven by terahertz(THz)waves and lasers on a dielectric grating can generate acceleration gradients up to GV/m in these higher frequency bands.Recent progress utilizing terahertz and optical waves has already demonstrated non-relativistic and relativistic electron acceleration and phase space manipulation.Moreover,the combination of a light-wave-driven electron source with a novel accelerator enables realization of an all-optical electron source,which unlocks new directions for small-scale and even integrated accelerator development.Progress Research on optical-field-driven electron acceleration originates from the laser invention in the last century.However,owing to electron b
作者
曾雨珊
余谢秋
田野
Zeng Yushan;Yu Xieqiu;Tian Ye(State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《中国激光》
EI
CAS
CSCD
北大核心
2023年第17期96-112,共17页
Chinese Journal of Lasers
基金
基础研究特区计划(JCYJ-SHFY-2021-002)
中国科学院基础前沿科学研究计划(ZDBS-LY-SLH018)
国家自然科学基金(12104471,U226720057,62105346)
中国科学院基础研究领域青年团队计划(YSBR060)
上海市青年科技英才扬帆计划(21YF1453900)
科技部重点研发专项(2022YFA1604400)。
关键词
太赫兹
电子加速
电介质激光加速
集成加速器
terahertz
electron acceleration
dielectric laser acceleration
integrated accelerator
