Measurements of undulator radiation power noise and comparison with ab initio calculations

被引：3

作者：

Lobach, Ihar ^{[1
]}

Nagaitsev, Sergei ^{[2
,5
]}

Lebedev, Valeri ^{[2
]}

Romanov, Aleksandr ^{[2
]}

Stancari, Giulio ^{[2
]}

Valishev, Alexander ^{[2
]}

Halavanau, Aliaksei ^{[3
]}

Huang, Zhirong ^{[3
]}

Kim, Kwang-Je ^{[4
,5
]}

机构：

[1] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[2] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA

[3] Stanford Univ, SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA

[4] Argonne Natl Accelerator Lab, Lemont, IL 60439 USA

[5] Univ Chicago, Enrico Fermi Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA

来源：

PHYSICAL REVIEW ACCELERATORS AND BEAMS | 2021年 / 24卷 / 04期

关键词：

PHOTON STATISTICS; BUNCH LENGTH; ELECTRON; SHOT; FLUCTUATIONS; COHERENT;

D O I：

10.1103/PhysRevAccelBeams.24.040701

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：

Generally, turn-to-turn fluctuations of synchrotron radiation power in a storage ring depend on the 6D phase-space distribution of the electron bunch. This effect is related to the interference of fields radiated by different electrons. Changes in the relative electron positions and velocities inside the bunch result in fluctuations in the total emitted energy per pass in a synchrotron radiation source. This effect has been previously described assuming constant and equal electron velocities before entering the synchrotron radiation source. In this paper, we present a generalized formula for the fluctuations with a non-negligible beam divergence. Further, we corroborate this formula in a dedicated experiment with undulator radiation in the Integrable Optics Test Accelerator (IOTA) storage ring at Fermilab. Lastly, possible applications in beam instrumentation are discussed.

引用

页数：14

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