High brightness light sources based on LD-pumped luminescent converters and LED-pumped luminescent concentrators

2019 ◽  
Author(s):  
Christoph G. A. Hoelen ◽  
Dany A. Benoy ◽  
Hugo J. Cornelissen ◽  
Alexander V. Vdovin ◽  
Dominiue Bruls
Keyword(s):  
Light Sources ◽  
High Brightness

scholarly journals Synchrotron Radiation Sources – Present Capabilities and Future Directions

1998 ◽  
Vol 5 (3) ◽  
pp. 168-175 ◽  
Author(s):  
Herman Winick
Keyword(s):  
Electron Beam ◽  
High Energy ◽  
Storage Rings ◽  
Light Sources ◽  
Beam Emittance ◽  
High Brightness ◽  
Performance Levels ◽  
Electron Sources ◽  
Short Period ◽  
Pass Through

Many of the more than 40 operational light sources around the world have achieved performance levels that exceed initial design goals. These accomplishments are reviewed, along with concepts and proposals for sources with performance levels exceeding those of present sources. These include storage rings with lower electron-beam emittance than present third-generation rings and free-electron lasers (FELs). It now appears that the highest performance sources will be based on linacs rather than storage rings. This is because emittance originates differently and scales differently with electron energy for rings and linacs, so that the lowest electron-beam emittance can be achieved in high-energy linacs equipped with high-brightness electron sources. Such electron beams can be used to provide X-ray beams with very high brightness and coherence in sub-picosecond pulses in a single pass through a small-gap short-period undulator by spontaneous emission, and with even higher beam brightness and coherence by stimulated coherent emission in an FEL. Designs for such FEL sources, and associated research and development, are underway at several laboratories.

scholarly journals Short X-ray pulses from third-generation light sources

2016 ◽  
Vol 23 (1) ◽  
pp. 141-151 ◽  
Author(s):  
A. G. Stepanov ◽  
C. P. Hauri
Keyword(s):  
Large Scale ◽  
Light Sources ◽  
Third Generation ◽  
Time Duration ◽  
Pulse Emission ◽  
Time Resolved ◽  
High Brightness ◽  
X Ray ◽  
Synchrotron Light ◽  
Synchrotron Light Sources

High-brightness X-ray radiation produced by third-generation synchrotron light sources (TGLS) has been used for numerous time-resolved investigations in many different scientific fields. The typical time duration of X-ray pulses delivered by these large-scale machines is about 50–100 ps. A growing number of time-resolved studies would benefit from X-ray pulses with two or three orders of magnitude shorter duration. Here, techniques explored in the past for shorter X-ray pulse emission at TGLS are reviewed and the perspective towards the realisation of picosecond and sub-picosecond X-ray pulses are discussed.

High brightness EUV light sources for actinic metrology

2010 ◽  
Author(s):  
Peter Choi ◽  
Sergey V. Zakharov ◽  
Raul Aliaga-Rossel ◽  
Aldrice Bakouboula ◽  
Jeremy Bastide ◽  
...  
Keyword(s):  
Light Sources ◽  
High Brightness

Broadband tunable laser and high-brightness light sources

2015 ◽  
Author(s):  
Dong-Yo Jheng ◽  
Shih-Chang Wang ◽  
Tuan-Shu Ho ◽  
Teng-I Yang ◽  
Kuang-Yu Hsu ◽  
...  
Keyword(s):  
Tunable Laser ◽  
Light Sources ◽  
High Brightness

scholarly journals PWM Dimming for High Brightness LED Based Automotive Lighting Applications

2017 ◽  
Vol 7 (5) ◽  
pp. 2434 ◽  
Author(s):  
Muhammad Wasif Umar ◽  
Norzaihar Yahaya ◽  
Zuhairi Baharuddin
Keyword(s):  
Luminous Flux ◽  
Light Sources ◽  
High Brightness ◽  
Pulse Width Modulated ◽  
Design Engineers ◽  
Simulink Simulation ◽  
Automotive Lighting ◽  
Theoretical Predictions ◽  
Dimming Control ◽  
Pwm Dimming

In recent years, the use of high brightness LEDs has become increasingly accepted as light sources in mainstream vehicles. However, they are semiconductor devices and their electrical characteristics are completely different to the traditional lamps. The output luminous flux of an LED is determined by the forward current running through it. Hence they cannot be powered directly from the automotive battery using the conventional driving techniques. They require specialised driving circuits which can respond to the changing needs of the LEDs as their electrical properties change, while maintaining the uniform brightness.<strong> </strong> This paper discusses the importance of dimming for LED based automotive lighting applications. A boost type DC-DC switching converter with pulse width modulated (PWM) dimming control has been proposed. MATLAB/Simulink simulation package has been used to verify the theoretical predictions hence to provide a useful guide for design engineers and researchers.

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