Recovery time of a plasma-wakefield accelerator

被引：37

作者：

D'Arcy, R. ^{[1
]}

Chappell, J. ^{[2
]}

Beinortaite, J. ^{[1
,2
]}

Diederichs, S. ^{[1
,3
]}

Boyle, G. ^{[1
]}

Foster, B. ^{[4
]}

Garland, M. J. ^{[1
]}

Caminal, P. Gonzalez ^{[1
,3
]}

Lindstrom, C. A. ^{[1
]}

Loisch, G. ^{[1
]}

Schreiber, S. ^{[1
]}

Schroeder, S. ^{[1
]}

Shalloo, R. J. ^{[1
]}

Thevenet, M. ^{[1
]}

Wesch, S. ^{[1
]}

Wing, M. ^{[1
,2
]}

Osterhoff, J. ^{[1
]}

机构：

[1] DESY, Hamburg, Germany

[2] UCL, London, England

[3] Univ Hamburg, Hamburg, Germany

[4] Univ Oxford, John Adams Inst, Dept Phys, Oxford, England

来源：

NATURE | 2022年 / 603卷 / 7899期

关键词：

ELECTRON-BEAM; LASER; DYNAMICS;

D O I：

10.1038/s41586-021-04348-8

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The interaction of intense particle bunches with plasma can give rise to plasma wakes(1,2) capable of sustaininggigavolt-per-metre electric fields(3,4), which are orders of magnitude higher than provided by state-of-the-art radio-frequency technology(5). Plasma wakefields can, therefore, strongly accelerate charged particles and offer the opportunity to reach higher particle energies with smaller and hence more widely available accelerator facilities. However, the luminosity and brilliance demands of high-energy physics and photon science require particle bunchesto be accelerated at repetition rates of thousands or even millions per second, which are orders of magnitude higher than demonstrated with plasma-wakefield technology(6,7). Here we investigate the upper limit on repetition rates of beam-driven plasma accelerators by measuring the time it takes for the plasma to recover to its initial state after perturbation by a wakefield. The many-nanosecond-level recovery time measured establishes the in-principle attainability of megahertz rates of acceleration in plasmas. The experimental signatures of the perturbation are well described by simulations of a temporally evolving parabolic ion channel, transferring energy from the collapsing wake to the surrounding media. This result establishes that plasma-wakefield modules could be developed as feasible high-repetition-rate energy boosters at current and future particle-physics and photon-science facilities.

引用

页码：58 / +

页数：10

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