Subradiant spontaneous undulator emission through collective suppression of shot noise

被引：11

作者：

Ratner, D. ^{[1
]}

Hemsing, E. ^{[1
]}

Gover, A. ^{[2
]}

Marinelli, A. ^{[1
]}

Nause, A. ^{[3
]}

机构：

[1] SLAC, Menlo Pk, CA 94025 USA

[2] Tel Aviv Univ, IL-69978 Tel Aviv, Israel

[3] Univ Calif Los Angeles, Los Angeles, CA USA

来源：

PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS | 2015年 / 18卷 / 05期

关键词：

FREE-ELECTRON LASER; INTENSE;

D O I：

10.1103/PhysRevSTAB.18.050703

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The phenomenon of Dicke's subradiance, in which the collective properties of a system suppress radiation, has received broad interest in atomic physics. Recent theoretical papers in the field of relativistic electron beams have proposed schemes to achieve subradiance through suppression of shot noise current fluctuations. The resulting "quiet" beam generates less spontaneous radiation than emitted even by a shot noise beam when oscillating in an undulator. Quiet beams could have diverse accelerator applications, including lowering power requirements for seeded free-electron lasers and improving efficiency of hadron cooling. In this paper we present experimental observation of a strong reduction in undulator radiation, demonstrating the feasibility of noise suppression as a practical tool in accelerator physics.

引用

页数：5

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