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线性阵列探测器，用于在线诊断 MHz 重复率下的光谱分布。

Linear array detector for online diagnostics of spectral distributions at MHz repetition rates.

机构信息

Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany.

Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany.

出版信息

J Synchrotron Radiat. 2019 Sep 1;26(Pt 5):1514-1522. doi: 10.1107/S1600577519007835.

DOI:10.1107/S1600577519007835
PMID:31490139
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6730618/
Abstract

Free-electron lasers (FELs) based on superconducting accelerator technology and storage ring facilities operate with bunch repetition rates in the MHz range, and the need arises for bunch-by-bunch electron and photon diagnostics. For photon-pulse-resolved measurements of spectral distributions, fast one-dimensional profile monitors are required. The linear array detector KALYPSO (KArlsruhe Linear arraY detector for MHz-rePetition rate SpectrOscopy) has been developed for electron bunch or photon pulse synchronous read-out with frame rates of up to 2.7 MHz. At the FLASH facility at DESY, a current version of KALYPSO with 256 pixels has been installed at a grating spectrometer as online diagnostics to monitor the pulse-resolved spectra of the high-repetition-rate FEL pulses. Application-specific front-end electronics based on MicroTCA standard have been developed for data acquisition and processing. Continuous data read-out with low latency in the microsecond range enables the integration into fast feedback applications. In this paper, pulse-resolved FEL spectra recorded at 1.0 MHz repetition rate for various operation conditions at FLASH are presented, and the first application of an adaptive feedback for accelerator control based on photon beam diagnostics is demonstrated.

摘要

基于超导加速器技术和储存环设施的自由电子激光（FEL）的工作重复频率在兆赫兹范围内，因此需要逐束电子和光子诊断。对于光子脉冲分辨的光谱分布测量，需要快速的一维轮廓监测器。线性阵列探测器 KalypsO（用于 MHz 重复率光谱学的 Karlsruhe 线性阵列探测器）是专为电子束或光子脉冲同步读出而开发的，其帧率高达 2.7 MHz。在 DESY 的 FLASH 设施中，已在光栅光谱仪上安装了具有 256 个像素的 KalypsO 当前版本，作为在线诊断工具来监测高重复率 FEL 脉冲的脉冲分辨光谱。已经开发了基于 MicroTCA 标准的专用前端电子设备，用于数据采集和处理。具有低延迟的连续微秒级数据读出可实现快速反馈应用的集成。本文介绍了在 FLASH 各种运行条件下以 1.0 MHz 重复率记录的脉冲分辨 FEL 光谱，并展示了基于光子束诊断的自适应反馈在加速器控制中的首次应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/801b09ed158d/s-26-01514-fig8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/0a2208d91176/s-26-01514-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/b384b0ca6cf6/s-26-01514-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/9fd9315b6913/s-26-01514-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/42fb069c7107/s-26-01514-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/012ba95d18b7/s-26-01514-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/1848dd9796b2/s-26-01514-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/a0a32270e375/s-26-01514-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/801b09ed158d/s-26-01514-fig8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/0a2208d91176/s-26-01514-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/b384b0ca6cf6/s-26-01514-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/9fd9315b6913/s-26-01514-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/42fb069c7107/s-26-01514-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/012ba95d18b7/s-26-01514-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/1848dd9796b2/s-26-01514-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/a0a32270e375/s-26-01514-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0bc2/6730618/801b09ed158d/s-26-01514-fig8.jpg

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本文引用的文献

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Quasi-real-time photon pulse duration measurement by analysis of FEL radiation spectra.通过分析自由电子激光辐射光谱进行准实时光子脉冲持续时间测量。
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3
Spectrometer for shot-to-shot photon energy characterization in the multi-bunch mode of the free electron laser at Hamburg.
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Rev Sci Instrum. 2015 Nov;86(11):113107. doi: 10.1063/1.4936293.