相关实验视频
Updated: Jan 22, 2026
06:42
Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
9.6K
对于X射线自由电子激光器的模式锁定频率的演示
Wenxiang Hu1,2, Gabriel Aeppli1,2,3, Christopher Arrell1
1Paul Scherrer Institute, PSI Center for Photon Science, 5232 Villigen PSI, Switzerland.
Physical review letters
|January 20, 2026
概括
研究人员展示了X射线自由电子激光器 (FEL) 锁定模式的自我放大自发发射 (SASE). 这一突破产生了相锁的X射线脉冲,推进了连贯光谱学和超快速动力学研究.
科学领域:
- 物理 物理学 物理
- 光子学 是一个光子学.
- 材料科学 材料科学 材料科学
背景情况:
- 射线自由电子激光器 (FEL) 是具有高亮度和可调节波长的先进光源.
- 在FEL中,标准的自我放大自发发射 (SASE) 产生了有限的纵向连贯性,其特点是尖的功率和光谱谱.
- 实现纵向连贯性对于先进的X射线应用至关重要.
研究的目的:
- 实验性地证明X射线自由电子激光器 (FEL) 的模式锁定自放大自发发射 (SASE).
- 为了产生周期性列车的相锁子femtosecondX射线脉冲.
- 为了使新的实验能力在连贯的光谱学和超快的动态.
主要方法:
- 实施一种模式合的SASE方案,在波浪器模块中使用磁性小.
- 集成外部光学激光器,以精确控制电子束内的FEL放大区域.
- 在频率 (光子) 和时间 (电子) 领域分析实验数据.
主要成果:
- 成功的实验演示模式锁定SASE,产生相锁定子femtosecondX射线脉冲.
- 产生周期脉冲列车,类似于光学频率.
- 支持增强连贯性和控制脉冲结构的证据.
结论:
- 模式锁定SASE提供了一种创新的方法,用于生成高度连贯的X射线脉冲.
- 这种技术显著提高了FEL辐射的纵向连贯性.
- 生成的相相关X射线脉冲将推动超快科学和连贯光谱学的进步.
更多相关视频
14:18Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
Published on: February 28, 2016
11.9K
08:48Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy
Published on: November 22, 2019
8.0K
相关概念视频
02:18X-ray Crystallography
25.8K
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
25.8K
01:16Self-Locking Screw
2.4K
A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. One of the key features that can make a screw jack more effective and reliable is its self-locking capability.
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
2.4K
01:07What is a Mode?
25.1K
The mode is one of the commonly used measures of a central tendency. It is defined as the most frequent value in a data set.
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...
25.1K
01:21Frequency-dependent Selection
23.1K
When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
23.1K
01:14Ventilatory Modes
1.4K
Mechanical ventilators are life-saving devices that support or replace spontaneous breathing. They deliver breaths to patients through varying methods known as ventilator modes. Understanding these modes is critical for healthcare providers managing patients with respiratory failure.
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...
1.4K
01:22MOSFET: Enhancement Mode
801
Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
801