The Technological Laboratory of LMU Munich supplies various types of solid-state target for laser plasma experiments at the Centre for Advanced Laser Applications in Garching.Our main focus here is on the production o...The Technological Laboratory of LMU Munich supplies various types of solid-state target for laser plasma experiments at the Centre for Advanced Laser Applications in Garching.Our main focus here is on the production of free-standing,thin foil targets,such as diamond-likecarbon foils,carbon nanotube foams(CNFs),plastic,and gold foils.The presented methods comprise cathodic arc deposition for DLC targets,chemical vapor deposition for CNFs,a droplet and spin-coating process for plastic foil production,as well as physical vapor deposition that has been optimized to provide ultrathin gold foils and tailored sacrifice layers.This paper reviews our current capabilities,which are a result of a close collaboration between target production processes and experiment,using high-power chirped pulse amplification laser systems over the past eight years.展开更多
The acoustic pulse emitted from the Bragg peak of a laser-accelerated proton bunch focused into water has recently enabled the reconstruction of the bunch energy distribution.By adding three ultrasonic transducers and...The acoustic pulse emitted from the Bragg peak of a laser-accelerated proton bunch focused into water has recently enabled the reconstruction of the bunch energy distribution.By adding three ultrasonic transducers and implementing a fast data analysis of the filtered raw signals,I-BEAT(Ion-Bunch Energy Acoustic Tracing)3D now provides the mean bunch energy and absolute lateral bunch position in real-time and for individual bunches.Relative changes in energy spread and lateral bunch size can also be monitored.Our experiments at DRACO with proton bunch energies between 10 and 30 MeV reveal sub-MeV and sub-mm resolution.In addition to this 3D bunch information,the signal strength correlates also with the absolute bunch particle number.展开更多
文摘The Technological Laboratory of LMU Munich supplies various types of solid-state target for laser plasma experiments at the Centre for Advanced Laser Applications in Garching.Our main focus here is on the production of free-standing,thin foil targets,such as diamond-likecarbon foils,carbon nanotube foams(CNFs),plastic,and gold foils.The presented methods comprise cathodic arc deposition for DLC targets,chemical vapor deposition for CNFs,a droplet and spin-coating process for plastic foil production,as well as physical vapor deposition that has been optimized to provide ultrathin gold foils and tailored sacrifice layers.This paper reviews our current capabilities,which are a result of a close collaboration between target production processes and experiment,using high-power chirped pulse amplification laser systems over the past eight years.
基金supported by the German Research Foundation (DFG) within the Research Training Group GRK 2274the Bundesministerium für Bildung und Forschung (BMBF) within project 01IS17048financial support by the BMBF within projects 05P18WMFA1 and 05P21WMFA1
文摘The acoustic pulse emitted from the Bragg peak of a laser-accelerated proton bunch focused into water has recently enabled the reconstruction of the bunch energy distribution.By adding three ultrasonic transducers and implementing a fast data analysis of the filtered raw signals,I-BEAT(Ion-Bunch Energy Acoustic Tracing)3D now provides the mean bunch energy and absolute lateral bunch position in real-time and for individual bunches.Relative changes in energy spread and lateral bunch size can also be monitored.Our experiments at DRACO with proton bunch energies between 10 and 30 MeV reveal sub-MeV and sub-mm resolution.In addition to this 3D bunch information,the signal strength correlates also with the absolute bunch particle number.
