Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Gamma Ray Laser Pump Diagnostic PDF full book. Access full book title Gamma Ray Laser Pump Diagnostic by C. B. Collins. Download full books in PDF and EPUB format.
Author: C. B. Collins Publisher: ISBN: Category : Languages : en Pages : 80
Book Description
The nuclear analog of the ruby laser would embody the most straightforward of the several concepts for a gamma ray laser. The greatest progress toward an ultrashort wavelength laser has been achieved along that direction 2. For ruby the identification and exploitation of a bandwidth funnel were the critical keys in the development of the first laser. There was a broad absorption band linked through efficient cascading to the narrow laser level. The search for the analogous situation on the nuclear scale is proceeding quite fruitfully. Significant amounts of nuclear fluorescence have been pumped by pulsed bremsstrahlung sources; thus proving that the concept of bandwidth funneling works as well at the nuclear level as it does for the ruby3. This critical process was found to produce eleven orders of magnitude increase in the amount of X-ray pump energy absorbed into demonstration nuclei of Se 77. Most recently, the first of the 29 candidate materials for a gamma ray laser was successfully pumped with intense pulses of bremsstrahlung. The yield of nuclear fluorescence was about 10,000 times greater than what was predicted by even the theories including the large factor for funneling 4. Selected over 28 alternatives solely on the basis of availability, this first material narrowly missed the threshold of feasibility for gamma ray laser. These results with a relatively unattractive candidate indicate that the probabilities should be raised for full success of one of the other 28 materials. (jhd).
Author: C. B. Collins Publisher: ISBN: Category : Languages : en Pages : 80
Book Description
The nuclear analog of the ruby laser would embody the most straightforward of the several concepts for a gamma ray laser. The greatest progress toward an ultrashort wavelength laser has been achieved along that direction 2. For ruby the identification and exploitation of a bandwidth funnel were the critical keys in the development of the first laser. There was a broad absorption band linked through efficient cascading to the narrow laser level. The search for the analogous situation on the nuclear scale is proceeding quite fruitfully. Significant amounts of nuclear fluorescence have been pumped by pulsed bremsstrahlung sources; thus proving that the concept of bandwidth funneling works as well at the nuclear level as it does for the ruby3. This critical process was found to produce eleven orders of magnitude increase in the amount of X-ray pump energy absorbed into demonstration nuclei of Se 77. Most recently, the first of the 29 candidate materials for a gamma ray laser was successfully pumped with intense pulses of bremsstrahlung. The yield of nuclear fluorescence was about 10,000 times greater than what was predicted by even the theories including the large factor for funneling 4. Selected over 28 alternatives solely on the basis of availability, this first material narrowly missed the threshold of feasibility for gamma ray laser. These results with a relatively unattractive candidate indicate that the probabilities should be raised for full success of one of the other 28 materials. (jhd).
Author: Publisher: ISBN: Category : Languages : en Pages : 107
Book Description
The most productive approaches to the problem of the gamma ray laser have focused upon upconversion techniques in which metastable nuclei are pumped with long wavelength radiation. At the nuclear level the storage of energy can approach tera-Joules (10(exp 12)J) per liter for thousands of years. However, any plan to use such a resource for a gamma ray laser poses problems of a broad interdisciplinary nature requiring the fusion of concepts taken from relatively unrelated fields of physics. Our research group has described several means through which this energy might be coupled to radiation field with cross sections for stimulated emission that could reach 10(exp -17) sq cm. Such a stimulated release could lead to output powers as great as 3 x 102 Watts/liter. Since 1978 we have pursued an approach for the upconversion of longer wavelength radiation incident upon isomeric nuclear populations that can avoid many of the difficulties encountered with traditional concepts 0 single-photon pumping. Experiments have confirmed the general theory and have indicated that a gamma-ray laser is feasible if the right combination of energy levels and branching ratios exists in some real material. Of the 1,886 distinguishable nuclear materials, the present state-of-the-art has been adequate to identify 29 first-class candidates, but further evaluation cannot proceed without remeasurements of nuclear. A laser-grade database of nuclear properties does not yet exist but the techniques for constructing one have been developed and utilize under this contract.
Author: C. B. Collins Publisher: ISBN: Category : Languages : en Pages : 219
Book Description
The most productive approaches to the problem of the gamma-ray laser have focused upon upconversion techniques in which metastable nuclei are pumped with long wavelength radiation. At the nuclear level the storage of energy can approach tera-Joules (10(exp 12)J) per liter for thousands of years. However, any plan to use such a resource for a gamma-ray laser poses problems of a broad interdisciplinary nature requiring the fusion of concepts taken from relatively unrelated fields of physics. Our research group has described several means through which this energy might be coupled to radiation fields with cross sections for stimulated emission that could reach 10(exp -17)sq cm. Such a stimulated release could lead to output powers as great as 3 x 1021 Watts/liter. Since 1978 we have pursued an approach for the upconversion of longer wavelength radiation incident upon isomeric nuclear populations that can avoid many of the difficulties encountered with traditional concepts of single photon pumping. Experiments have confirmed the general theory and have indicated that a gamma- ray laser is feasible if the right combination of energy levels and branching ratios exists in some real material. Of the 1,886 distinguishable nuclear materials, the present state-of-the-art has been adequate to identify 29 first- class candidates, but further evaluation cannot proceed without remeasurements of nuclear properties with higher precision. Gamma-ray laser, Ultrashort wavelength laser.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
Laser sources generating sub-nm radiation, using recoilless nuclear transitions in solids, have been proposed for years. This review examines, from the standpoint of kinetics, many solutions (viz., narrowed line, explosive neutron pump, two-stage pump, two-step pump) that have been proposed for the basic problem: that pumping can inhibit or destroy the Moessbauer and Borrmann effects, which are essential for gain. 4 refs.
Author: K Muraoka Publisher: CRC Press ISBN: 1420034065 Category : Science Languages : en Pages : 307
Book Description
Updated and expanded from the original Japanese edition, Laser-Aided Diagnostics of Gases and Plasmas takes a unique approach in treating laser-aided diagnostics. The book unifies the subject by joining applications instead of describing each application as a totally separate system. In taking this approach, it highlights the relative strengths of
Author: C. B. Collins
Author: C. B. Collins
Author: 
Author: 
Author: C. B. Collins
Author: 
Author: 
Author: 
Author: 
Author: 
Author: K Muraoka