Fast mapping of terahertz bursting thresholds and characteristics at synchrotron light sources

被引：13

作者：

Brosi, Miriam ^{[1
]}

Steinmann, Johannes L. ^{[1
]}

Blomley, Edmund ^{[2
]}

Bruendermann, Erik ^{[2
]}

Caselle, Michele ^{[3
]}

Hiller, Nicole ^{[2
,4
]}

Kehrer, Benjamin ^{[1
]}

Mathis, Yves-Laurent ^{[2
]}

Nasse, Michael J. ^{[2
]}

Rota, Lorenzo ^{[3
]}

Schedler, Manuel ^{[2
]}

Schoenfeldt, Patrik ^{[2
]}

Schuh, Marcel ^{[1
]}

Schwarz, Markus ^{[1
]}

Weber, Marc ^{[3
]}

Mueller, Anke-Susanne ^{[1
,2
]}

机构：

[1] Karlsruhe Inst Technol, Lab Applicat Synchrotron Radiat, Kaiserstr 12, D-76131 Karlsruhe, Germany

[2] Karlsruhe Inst Technol, Inst Beam Phys & Technol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[3] Karlsruhe Inst Technol, Inst Data Proc & Elect, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[4] PSI, Villigen, Switzerland

来源：

PHYSICAL REVIEW ACCELERATORS AND BEAMS | 2016年 / 19卷 / 11期

关键词：

INSTABILITY;

D O I：

10.1103/PhysRevAccelBeams.19.110701

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：

Dedicated optics with extremely short electron bunches enable synchrotron light sources to generate intense coherent THz radiation. The high degree of spatial compression in this so-called low-a(c) optics entails a complex longitudinal dynamics of the electron bunches, which can be probed studying the fluctuations in the emitted terahertz radiation caused by the microbunching instability ("bursting"). This article presents a "quasi-instantaneous" method for measuring the bursting characteristics by simultaneously collecting and evaluating the information from all bunches in a multibunch fill, reducing the measurement time from hours to seconds. This speed-up allows systematic studies of the bursting characteristics for various accelerator settings within a single fill of the machine, enabling a comprehensive comparison of the measured bursting thresholds with theoretical predictions by the bunched-beam theory. This paper introduces the method and presents first results obtained at the ANKA synchrotron radiation facility.

引用

页数：7

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