Direct acceleration in intense laser fields used for bunch amplification of relativistic electrons

J. Braenzel, A. A. Andreev, L. Ehrentraut, M. Schnürer

Результат исследований: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

Аннотация

A method, how electrons can be directly accelerated in intense laser fields, is investigated experimentally and discussed with numerical and analytical simulation. When ultrathin foil targets are exposed with peak laser intensities of ∼ 1x1020 W/cm2, slow electrons (∼ keV kinetic energy), that are emitted from the ultrathin foil target along laser propagation direction, are post-accelerated in the transmitted laser field. They received significant higher kinetic energies (MeV), when this interaction was limited in duration and an enhanced number of fast electrons were detected. The decoupling of the light field from the electron interaction we realized with a second separator foil, blocking the transmitted laser light at a particular distance and allowing the fast electrons to pass. Variation of the propagation distance in the laser field results in different energy gains for the electrons. This finding is explained with electron acceleration in the electromagnetic field of a light pulse and confirms a concept being discussed for some time. In the experiments the effect manifests in an electron number amplification of about 3 times around a peak at 1 MeV electron energy. Measurements confirmed that the overall number in the whole bunch is enhanced to about 109 electrons covering kinetic energies between 0.5 to 5 MeV. The method holds promise for ultrashort electron bunch generation at MeV energies for direct application, e.g. ultra-fast electron diffraction, or for injection into post accelerator stages for different purposes.

Язык оригиналаанглийский
Название основной публикацииLaser Acceleration of Electrons, Protons, and Ions IV
РедакторыFlorian J. Gruner, Eric Esarey, Carl B. Schroeder
ИздательSPIE
ISBN (электронное издание)9781510609815
DOI
СостояниеОпубликовано - 1 янв 2017
СобытиеLaser Acceleration of Electrons, Protons, and Ions IV 2017 - Prague, Чехия
Продолжительность: 24 апр 201726 апр 2017

Серия публикаций

НазваниеProceedings of SPIE - The International Society for Optical Engineering
Том10240
ISSN (печатное издание)0277-786X
ISSN (электронное издание)1996-756X

конференция

конференцияLaser Acceleration of Electrons, Protons, and Ions IV 2017
СтранаЧехия
ГородPrague
Период24/04/1726/04/17

Предметные области Scopus

  • Электроника, оптика и магнитные материалы
  • Физика конденсатов
  • Прикладные компьютерные науки
  • Прикладная математика
  • Электротехника и электроника

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