Author: Paul Samuel JohnstonPublisher:
ISBN:
Category :
Languages : en
Pages : 262
Book Description
Broadband Cavity Enhanced Absorption Spectroscopy
Author: Paul Samuel JohnstonPublisher:
ISBN:
Category :
Languages : en
Pages : 262
Book Description
Cavity-Enhanced Spectroscopy and Sensing
Author: Gianluca GagliardiPublisher: Springer
ISBN: 3642400035
Category : Science
Languages : en
Pages : 537
Book Description
The book reviews the dramatic recent advances in the use of optical resonators for high sensitivity and high resolution molecular spectroscopy as well as for chemical, mechanical and physical sensing. It encompasses a variety of cavities including those made of two or more mirrors, optical fiber loops, fiber gratings and spherical cavities. The book focuses on novel techniques and their applications. Each chapter is written by an expert and/or pioneer in the field. These experts also provide the theoretical background in optics and molecular physics where needed. Examples of recent breakthroughs include the use of frequency combs (Nobel prize 2005) for cavity enhanced sensing and spectroscopy, the use of novel cavity materials and geometries, the development of optical heterodyne detection techniques combined to active frequency-locking schemes. These methods allow the use and interrogation of optical resonators with a variety of coherent light sources for trace gas detection and sensing of strain, temperature and pressure.
Development and Deployment of a Broadband Cavity Enhanced Absorption Spectroscopy Instrument for Airborne Measurements of Trace Gases
Author: Oliver John KennedyTime-resolved Broadband Cavity-enhanced Absorption Spectroscopy for Chemical Kinetics
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 26
Book Description
Experimental measurements of elementary reaction rate coefficients and product branching ratios are essential to our understanding of many fundamentally important processes in Combustion Chemistry. However, such measurements are often impossible because of a lack of adequate detection techniques. Some of the largest gaps in our knowledge concern some of the most important radical species, because their short lifetimes and low steady-state concentrations make them particularly difficult to detect. To address this challenge, we propose a novel general detection method for gas-phase chemical kinetics: time-resolved broadband cavity-enhanced absorption spectroscopy (TR-BB-CEAS). This all-optical, non-intrusive, multiplexed method enables sensitive direct probing of transient reaction intermediates in a simple, inexpensive, and robust experimental package.
Development and Atmospheric Applications of a Novel Broadband Cavity Enhanced Absorption Spectrometer
Author: Justin Mohsen LangridgeCavity Ring-Down Spectroscopy
Author: Giel BerdenPublisher: John Wiley & Sons
ISBN: 9781444308242
Category : Science
Languages : en
Pages : 344
Book Description
Cavity Ring-Down Spectroscopy: Techniques and Applications provides a practical overview of this valuable analytical tool, explaining the fundamental concepts and experimental methods, and illustrating important applications. Designed as both an introductory text and a reference source, this book is relevant for scientists unfamiliar with CRDS who are interested in using the technique in their research, as well as experienced users.
Time-Resolved Broadband Cavity-Enhanced Absorption Spectrometry
Author: Advances in Spectroscopic Monitoring of the Atmosphere
Author: Weidong ChenPublisher: Elsevier
ISBN: 0128156899
Category : Science
Languages : en
Pages : 634
Book Description
Advances in Spectroscopic Monitoring of the Atmosphere provides a comprehensive overview of cutting-edge technologies and monitoring applications. Concepts are illustrated by numerous examples with information on spectroscopic techniques and applications widely distributed throughout the text. This information is important for researchers to gain an overview of recent developments in the field and make informed selections among the most suitable techniques. This volume also provides information that will allow researchers to explore implementing and developing new diagnostic tools or new approaches for trace gas and aerosol sensing themselves. Advances in Spectroscopic Monitoring of the Atmosphere covers advanced and newly emerging spectroscopic techniques for optical metrology of gases and particles in the atmosphere. This book will be a valuable reference for atmospheric scientists, including those whose focus is applying the methods to atmospheric studies, and those who develop instrumentation. It will also serve as a useful introduction to researchers entering the field and provide relevant examples to researchers and students developing and applying optical sensors for a variety of other scientific, technical, and industrial uses. Overview of new applications including remote sensing by UAV, laser heterodyne radiometry, dual comb spectroscopy, and more Features in-situ observations and measurements for real-world data Includes content on leading edge optical sensors
Design and assembling of a broadband cavity ringdown and cavity enhanced absorption spectrometer using light emitting diodes
Author: Jan MeinenPublisher:
ISBN:
Category :
Languages : de
Pages : 108
Book Description
Wir leben in einer Zeit, in der die Folgen des Menschen auf die Umwelt auch für Leihen immer deutlicher sichtbar werden. Vor allem die anthropogene Beeinflussung des Klimas wird zunehmend ein politisches und mediales Thema. Es bleibt jedoch schwierig Handlungen des Menschen kausal mit Klimafolgen in Zusammenhang zu bringen. Dies gibt so genannten Klimakritikern Rückendeckung. Der Grund für das unzureichende Verständnis ist die Komplexität der Prozesse, bei denen vor allem hoch verdünnte Spurenstoffe eine Rolle spielen. Im Bereich der Umweltphysik wird die Verteilung von Spurenstoffen und ihr Einfluss auf das Klima seit Jahren erforscht. Hierzu werden vor allem DOAS-Geräte eingesetzt. In dieser Arbeit werden resonanzverstärktes optischen Absoptionsmessverfahren vorgestellt, welche herkömmliche DOAS-Verfahren erweitern. Nach einer ausführlichen Vorstellung bisher entwickelter CRDSund CEAS-Verfahren wird das selbst entwickelte Gerät zum Nachweis von 3 NO und 2 NO vorgestellt. Es werden Proof of Principle Messungen diskutiert, die eine Einschätzung der Machbarkeit der verschiedenen Verfahren geben. Es wird gezeigt, dass vor allem die Weiterentwicklung der CEAS-DOAS Technik viel versprechend ist.
Author: