High peak current operation of x-ray free-electron laser multiple beam lines by suppressing coherent synchrotron radiation effects

被引：8

作者：

Hara, Toru ^{[1
]}

Kondo, Chikara ^{[2
]}

Inagaki, Takahiro ^{[1
]}

Togawa, Kazuaki ^{[1
]}

Fukami, Kenji ^{[2
]}

Nakazawa, Shingo ^{[3
]}

Hasegawa, Taichi ^{[3
]}

Morimoto, Osamu ^{[3
]}

Yoshioka, Masamichi ^{[3
]}

Maesaka, Hirokazu ^{[1
]}

Otake, Yuji ^{[1
]}

Tanaka, Hitoshi ^{[1
]}

机构：

[1] RIKEN, SPring Ctr 8, Kouto 1-1-1, Sayo, Hyogo 6795148, Japan

[2] Japan Synchrotron Radiat Res Inst, Kouto 1-1-1, Sayo, Hyogo 6795198, Japan

[3] SPring 8 Serv Co Ltd, Kouto 1-20-5,Shingu Cho, Tatsuno, Hyogo 6795165, Japan

来源：

PHYSICAL REVIEW ACCELERATORS AND BEAMS | 2018年 / 21卷 / 04期

关键词：

EXTREME-ULTRAVIOLET; REGION; SACLA;

D O I：

10.1103/PhysRevAccelBeams.21.040701

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 parallel operation of multiple beam lines is an important means to expand the opportunity of user experiments at x-ray free-electron laser (XFEL) facilities. At SPring-8 Angstrom free-electron laser (SACLA), the multi-beam-line operation had been tested using two beam lines, but transverse coherent synchrotron radiation (CSR) effects at a dogleg beam transport severely limited the laser performance. To suppress the CSR effects, a new beam optics based on two double bend achromat (DBA) structures was introduced for the dogleg. After the replacement of the beam optics, high peak current bunches of more than 10 kA are now stably transported through the dogleg and the laser pulse output is increased by a factor of 2-3. In the multi-beam-line operation of SACLA, the electron beam parameters, such as the beam energy and peak current, can be adjusted independently for each beam line. Thus the laser output can be optimized and wide spectral tunability is ensured for all beam lines.

引用

页数：7

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