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使用金刚石传感器进行高通量、高剂量率X射线穿透诊断。

Use of diamond sensors for a high-flux, high-rate X-ray pass-through diagnostic.

作者信息

Bohon J, Gonzalez E, Grace C, Harris C T, Jacobsen B, Kachiguine S, Kim D, MacArthur J, Martinez-McKinney F, Mazza S, Nizam M, Norvell N, Padilla R, Potter E, Prakash T, Prebys E, Ryan E, Schumm B A, Smedley J, Stuart D, Tarka M, Torrecilla I S, Wilder M, Zhu D

机构信息

Los Alamos National Laboratory, Los Alamos, NM 87545, USA.

Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, CA 95064, USA.

出版信息

J Synchrotron Radiat. 2022 May 1;29(Pt 3):595-601. doi: 10.1107/S1600577522003022. Epub 2022 Apr 25.

DOI:10.1107/S1600577522003022
PMID:35510992
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9070720/
Abstract

X-ray free-electron lasers (XFELs) deliver pulses of coherent X-rays on the femtosecond time scale, with potentially high repetition rates. While XFELs provide high peak intensities, both the intensity and the centroid of the beam fluctuate strongly on a pulse-to-pulse basis, motivating high-rate beam diagnostics that operate over a large dynamic range. The fast drift velocity, low X-ray absorption and high radiation tolerance properties of chemical vapour deposition diamonds make these crystals a promising candidate material for developing a fast (multi-GHz) pass-through diagnostic for the next generation of XFELs. A new approach to the design of a diamond sensor signal path is presented, along with associated characterization studies performed in the XPP endstation of the LINAC Coherent Light Source (LCLS) at SLAC. Qualitative charge collection profiles (collected charge versus time) are presented and compared with those from a commercially available detector. Quantitative results on the charge collection efficiency and signal collection times are presented over a range of approximately four orders of magnitude in the generated electron-hole plasma density.

摘要

X射线自由电子激光（XFEL）能在飞秒时间尺度上产生相干X射线脉冲，且重复频率可能很高。虽然XFEL提供了高的峰值强度，但光束的强度和质心在逐脉冲基础上都会强烈波动，这就促使人们开发能在大动态范围内工作的高速束流诊断技术。化学气相沉积金刚石具有快速的漂移速度、低的X射线吸收和高的辐射耐受性，这些特性使这些晶体成为开发用于下一代XFEL的快速（多吉赫兹）穿透式诊断技术的有前景的候选材料。本文介绍了一种金刚石传感器信号路径设计的新方法，以及在SLAC的直线加速器相干光源（LCLS）的XPP终端站进行的相关表征研究。给出了定性的电荷收集曲线（收集到的电荷与时间的关系），并与市售探测器的曲线进行了比较。在产生的电子 - 空穴等离子体密度约四个数量级的范围内，给出了电荷收集效率和信号收集时间的定量结果。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/8c8cb4d8f2b6/s-29-00595-fig11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/3f4dfd5a8aef/s-29-00595-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/8ad000376078/s-29-00595-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/4540a7635fb4/s-29-00595-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/e800af139a25/s-29-00595-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/a72b1aa44493/s-29-00595-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/b8a5bd391110/s-29-00595-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/da4d988ea791/s-29-00595-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/ea3518e494d7/s-29-00595-fig8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/8d080d64d330/s-29-00595-fig9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/8840c27e3bee/s-29-00595-fig10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/8c8cb4d8f2b6/s-29-00595-fig11.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/3f4dfd5a8aef/s-29-00595-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/8ad000376078/s-29-00595-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/4540a7635fb4/s-29-00595-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/e800af139a25/s-29-00595-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/a72b1aa44493/s-29-00595-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/b8a5bd391110/s-29-00595-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/da4d988ea791/s-29-00595-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/ea3518e494d7/s-29-00595-fig8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/8d080d64d330/s-29-00595-fig9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/8840c27e3bee/s-29-00595-fig10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9fd4/9070720/8c8cb4d8f2b6/s-29-00595-fig11.jpg

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Measurement of the absolute number of photons of the hard X-ray beamline at the Linac Coherent Light Source.直线加速器相干光源硬X射线束线光子绝对数量的测量。
J Synchrotron Radiat. 2019 Mar 1;26(Pt 2):320-327. doi: 10.1107/S1600577519000250. Epub 2019 Feb 11.