Cross-Correlation of THz Pulses from the Electron Storage Ring BESSY II

被引：3

作者：

Schade, Ulrich ^{[1
]}

Kuske, Peter ^{[1
]}

Lee, Jongseok ^{[2
]}

Marchetti, Barbara ^{[3
]}

Ortolani, Michele ^{[4
]}

机构：

[1] Helmholtz Zentrum Berlin Mat & Energie GmbH, Albert Einstein Str 15, D-12489 Berlin, Germany

[2] Gwangju Inst Sci & Technol, Dept Phys & Photon Sci, Gwangju 61005, South Korea

[3] DESY, Notkestr 85, D-22607 Hamburg, Germany

[4] Sapienza Univ Rome, Dept Phys, Piazzale Aldo Moro 2, I-00185 Rome, Italy

来源：

CONDENSED MATTER | 2020年 / 5卷 / 02期

关键词：

THz; coherent synchrotron radiation; low alpha; cross-correlation; pump-probe; RADIATION;

D O I：

10.3390/condmat5020024

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Coherent synchrotron radiation from an electron storage ring is observed in the THz spectral range when the bunch length is shortened down to the sub-mm-range. With increasing stored current, the bunch becomes longitudinally unstable and modulates the THz emission in the time domain. These micro-instabilities are investigated at the electron storage ring BESSY II by means of cross-correlation of the THz fields from successive bunches. The investigations allow deriving the longitudinal length scale of the micro bunch fluctuations and show that it grows faster than the current-dependent bunch length. Our findings will help to set the limits for the possible time resolution for pump-probe experiments achieved with coherent THz synchrotron radiation from a storage ring.

引用

页数：12

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