Extremely Dense Gamma-Ray Pulses in Electron Beam-Multifoil Collisions

Sampath, Archana; Davoine, Xavier; Corde, S.; Grémillet, L.; Gilljohann, Max; Sangal, Maitreyi; Keitel, Christoph H.; Ariniello, Robert; Cary, John R.; Ekerfelt, Henrik; Emma, Claudio; Fiúza, Frederico; Fujii, Hiroki; Hogan, Mark; Joshi, C.; Knetsch, A.; Kononenko, Olena; Lee, Valentina; Litos, M.; Nie, Zan; O’Shea, Brendan; Peterson, James R.; Claveria, Pablo San Miguel; Storey, D.; Wu, Yipeng; Xu, Xinlu; Zhang, Chaojie; Tamburini, Matteo

doi:10.1103/physrevlett.126.064801

Cited by 31 publications

(12 citation statements)

References 62 publications

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“…For the former set of parameters, χ max e is only 1, while for the latter, χ max e is up to 7.6. In general, further compressing the driving beam size [50][51][52][53] or increasing Q 0 or ε 0 can increase the positron yield effectively, meanwhile ensuring a high positron polarization, provided the optimal colliding condition of σ s = 0.5σ d and d 0 = 1.5σ d is fulfilled.…”

Section: Impacts Of Two Beam Parametersmentioning

confidence: 99%

Generation of polarized positron beams via collisions of ultrarelativistic electron beams

Song,

Wang,

2021

Preprint

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A novel scheme is proposed for generating a polarized positron beam via multiphoton Breit-Wheeler process during the collision of a 10 GeV, pC seeding electron beam with the other 1 GeV, nC driving electron beam. The driving beam provides the strong self-generated field, and a suitable transverse deviation distance between two beams enables the field experienced by the seeding beam to be unipolar, which is crucial for realizing the positron polarization. We employ the particle simulation with a Monte-Carlo method to calculate the spin-and polarization-resolved photon emission and electron-positron pair production in the local constant field approximation. Our simulation results show that a highly polarized positron beam with polarization above 40% can be generated in several femtoseconds, which is robust with respect to parameters of two electron beams.Based on an analysis of the influence of γ-photon polarization on the polarized pair production, we find that a polarized seeding beam of the proper initial polarization can further improve the positron polarization to 60%.

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Section: Impacts Of Two Beam Parametersmentioning

confidence: 99%

Generation of polarized positron beams via collisions of ultrarelativistic electron beams

Song,

Wang,

2021

Preprint

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“…We also consider the results of a recent simulation from an extremely dense gamma-ray source obtained during the interaction of a dense electron beam with multiple micron-sized foils (Sampath et al. 2021). Although it remains a numerical result and its experimental realization may lie far in the future, it achieves a record gamma-ray density of with a distribution peaked at 100 MeV.…”

Section: Relevance For Astrophysics and Laboratory Environmentsmentioning

confidence: 99%

Compton-driven beam formation and magnetization via plasma microinstabilities

2021

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Compton scattering of gamma rays propagating in a pair plasma can drive the formation of a relativistic electron positron beam. This process is scrutinized theoretically and numerically via particle-in-cell simulations. In addition, we determine in which conditions the beam can prompt a beam-plasma instability and convert its kinetic energy into magnetic energy. We argue that such conditions can be met at the photosphere radius of bright gamma-ray bursts.

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“…Отметим, что недавно была предложена схожая схема для генерации ярких гамма-пучков, основанная на столкновении сильноточного пучка ультрарелятивистских частиц с последовательностью тонких металлических плёнок [25]. В данной конфигурации эффективное поле, действующее на электроны пучка, связанно с " отражением" собственного поля пучка от тонкого плазменного слоя, и является по смыслу полем переходного излучения.…”

unclassified

“…В данной конфигурации эффективное поле, действующее на электроны пучка, связанно с " отражением" собственного поля пучка от тонкого плазменного слоя, и является по смыслу полем переходного излучения. Несмотря на различия в физическом механизме генерации гамма-квантов, эффективность генерации и спектр выходного гамма-излучения весьма похожи в конфигурации [25] и рассматриваемой нами конфигурации. Как было описано выше, электроны пучка совершают бетатронные колебания в поле сильно нелинейной кильватерной волны, структура которого описана, например, в публикации [26].…”

unclassified

Моделирование Генерации Гамма-Излучения При Взаимодействии Сильноточных Пучков Ультрарелятивистских Частиц С Плазмой

Самсонов¹,

Костюков²

2022

Оптика И Спектроскопия

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The generation of gamma photons in the interaction of high-current beams of ultrarelativistic particles with thick plasma targets is considered. Efficiency of the beam energy conversion into gamma radiation depending on the target thickness and density is obtained via full-size 3D particle-in-cell simulation. An analytical estimate obtained within the framework of an approximate model is presented, which is in good agreement with the results of numerical simulation. The considered interaction configuration can be a fairly simple and effective way to obtain high-quality gamma beams. Key words

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Extremely Dense Gamma-Ray Pulses in Electron Beam-Multifoil Collisions

Cited by 31 publications

References 62 publications

Generation of polarized positron beams via collisions of ultrarelativistic electron beams

Generation of polarized positron beams via collisions of ultrarelativistic electron beams

Compton-driven beam formation and magnetization via plasma microinstabilities

Моделирование Генерации Гамма-Излучения При Взаимодействии Сильноточных Пучков Ультрарелятивистских Частиц С Плазмой

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