scholarly journals Characteristics of Laser System Used in Large-Scale Cryogenic Gravitational Wave Telescope

2011 ◽  
Vol 54 (12) ◽  
pp. 604-609
Author(s):  
Noriaki OHMAE ◽  
Norikatsu MIO
Keyword(s):  
Gravitational Wave ◽  
Large Scale ◽  
Laser System

Quantum Optomechanics and Nanomechanics

2020 ◽  
Keyword(s):  
Gravitational Wave ◽  
Summer School ◽  
Large Scale ◽  
Quantum Noise ◽  
Foundations Of Quantum Mechanics ◽  
Wide Range ◽  
Measurement Laser ◽  
Quantum Limits ◽  
Quantum Optomechanics ◽  
Quantum Ground State

The Les Houches Summer School 2015 covered the emerging fields of cavity optomechanics and quantum nanomechanics. Optomechanics is flourishing and its concepts and techniques are now applied to a wide range of topics. Modern quantum optomechanics was born in the late 70s in the framework of gravitational wave interferometry, initially focusing on the quantum limits of displacement measurements. Carlton Caves, Vladimir Braginsky, and others realized that the sensitivity of the anticipated large-scale gravitational-wave interferometers (GWI) was fundamentally limited by the quantum fluctuations of the measurement laser beam. After tremendous experimental progress, the sensitivity of the upcoming next generation of GWI will effectively be limited by quantum noise. In this way, quantum-optomechanical effects will directly affect the operation of what is arguably the world’s most impressive precision experiment. However, optomechanics has also gained a life of its own with a focus on the quantum aspects of moving mirrors. Laser light can be used to cool mechanical resonators well below the temperature of their environment. After proof-of-principle demonstrations of this cooling in 2006, a number of systems were used as the field gradually merged with its condensed matter cousin (nanomechanical systems) to try to reach the mechanical quantum ground state, eventually demonstrated in 2010 by pure cryogenic techniques and a year later by a combination of cryogenic and radiation-pressure cooling. The book covers all aspects—historical, theoretical, experimental—of the field, with its applications to quantum measurement, foundations of quantum mechanics and quantum information. Essential reading for any researcher in the field.

Present status of large-scale cryogenic gravitational wave telescope

2004 ◽  
Vol 21 (5) ◽  
pp. S1161-S1172 ◽  
Author(s):  
T Uchiyama ◽  
K Kuroda ◽  
M Ohashi ◽  
S Miyoki ◽  
H Ishitsuka ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Present Status ◽  
Large Scale

scholarly journals Large-Scale Cryogenic Gravitational Wave Telescope (LCGT)

2003 ◽  
Vol 151 ◽  
pp. 221-225 ◽  
Author(s):  
Norikatsu Mio ◽  
the LCGT Collaboration
Keyword(s):  
Gravitational Wave ◽  
Large Scale

Current status of large-scale cryogenic gravitational wave telescope

2003 ◽  
Vol 20 (17) ◽  
pp. S871-S884 ◽  
Author(s):  
K Kuroda ◽  
M Ohashi ◽  
S Miyoki ◽  
T Uchiyama ◽  
H Ishitsuka ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Large Scale ◽  
Current Status

Data Management in Scientific Workflows

2012 ◽  
pp. 177-187
Author(s):  
Ewa Deelman ◽  
Ann Chervenak
Keyword(s):  
Data Management ◽  
Gravitational Wave ◽  
Large Scale ◽  
Real Life ◽  
Scientific Workflows ◽  
Workflow Systems ◽  
Automated Generation ◽  
Workflow Execution ◽  
Data Products ◽  
Workflow Planning

Scientific applications such as those in astronomy, earthquake science, gravitational-wave physics, and others have embraced workflow technologies to do large-scale science. Workflows enable researchers to collaboratively design, manage, and obtain results that involve hundreds of thousands of steps, access terabytes of data, and generate similar amounts of intermediate and final data products. Although workflow systems are able to facilitate the automated generation of data products, many issues still remain to be addressed. These issues exist in different forms in the workflow lifecycle. This chapter describes a workflow lifecycle as consisting of a workflow generation phase where the analysis is defined, the workflow planning phase where resources needed for execution are selected, the workflow execution part, where the actual computations take place, and the result, metadata, and provenance storing phase. The authors discuss the issues related to data management at each step of the workflow cycle. They describe challenge problems and illustrate them in the context of real-life applications. They discuss the challenges, possible solutions, and open issues faced when mapping and executing large-scale workflows on current cyberinfrastructure. They particularly emphasize the issues related to the management of data throughout the workflow lifecycle.

scholarly journals Characterisation and Modelling of Ultrashort Laser-Driven Electromagnetic Pulses

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Kwinten Nelissen ◽  
Máté Liszi ◽  
Massimo De Marco ◽  
Valeria Ospina ◽  
István Drotár ◽  
...  
Keyword(s):  
Pulse Energy ◽  
Large Scale ◽  
Laser Intensity ◽  
Laser Energy ◽  
Laser System ◽  
Intense Laser ◽  
Electron Interaction ◽  
Laser Target ◽  
Electromagnetic Pulses ◽  
Target Holder

AbstractRecent advances on laser technology have enabled the generation of ultrashort (fs) high power (PW) laser systems. For such large scale laser facilities there is an imperative demand for high repetition rate operation in symbiosis with beamlines or end-stations. In such extreme conditions the generation of electromagnetic pulses (EMP) during high intense laser target interaction experiments can tip the scale for the good outcome of the campaign. The EMP effects are several including interference with diagnostic devices and actuators as well as damage of electrical components. The EMP issue is quite known in the picosecond (ps) pulse laser experiments but no systematic study on EMP issues at multi-Joule fs-class lasers has been conducted thus far. In this paper we report the first experimental campaign for EMP-measurements performed at the 200 TW laser system (VEGA 2) at CLPU laser center. EMP pulse energy has been measured as a function of the laser intensity and energy together with other relevant quantities such as (i) the charge of the laser-driven protons and their maximum energy, as well as (ii) the X-ray Kα emission coming from electron interaction inside the target. Analysis of experimental results demonstrate (and confirm) a direct correlation between the measured EMP pulse energy and the laser parameters such as laser intensity and laser energy in the ultrashort pulse duration regime. Numerical FEM (Finite Element Method) simulations of the EMP generated by the target holder system have been performed and the simulations results are shown to be in good agreement with the experimental ones.

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