cropland through sound and scientifically proven research methods. The Pesticide Application Technology Laboratory, constructed in 2012, exists to support the safe and efficacious application of approximately 900 million pounds of active ingredient applied annually to U.S. We will discuss the relation between gas density and a cluster size in the presentation.Pesticide Application Technology Laboratory Moreover, the gas density profile was obtained by the interferometry. The sub-micron sized CO clusters were verified by measuring the angular distribution of the scattering light from the mixed gas target of CO (30%) and H (70%). In present work, the target diagnosis apparatus applying Mie scattering and interferometry has been developed. However, a characterization of the cluster-gas targets is not sufficient to further investigate the ion acceleration mechanism and optimize the acceleration condition. We have achieved high-energy ion generation in the laser driven ion acceleration using cluster-gas targets, which has been prepared by using the nozzle specially designed based on the Boldarev's model. Jinno, Satoshi Fukuda, Yuji Sakaki, Hironao Yogo, Akifumi Kanasaki, Masato Kondo, Kiminori Faenov, A. These results were compared with the Boldarev's model.ĭiscussion of gas density dependence in the cluster size evaluation using Mie scattering The density profile was obtained from the phase shift of the laser light acquired by the interferometer. We have estimated the size distribution of CO cluster by measuring the angular distribution of scattering light from the clusters for laser irradiation. CO clusters are formed in the supersonic jet of the mixture gas of H and CO through the three-step conical nozzle. For this reason, in present work, the target diagnosis apparatus applying Mie scattering and interferometry has been developed. However, a characterization of the targets formed by this nozzle was not sufficient to further investigate the ion acceleration mechanism and optimize the acceleration condition. In this experiment, a three-step conical nozzle, designed based on the Boldarev's model, was used to prepare large sized clusters. High-energy ion generation has been achieved by using cluster-gas targets in the laser driven ion acceleration.

Jinno, Satoshi Fukuda, Yuji Sakaki, Hironao Yogo, Akifumi Kondo, Kiminori Faenov, A. The results are quantitatively in good agreement with the experimentally observed X-ray emission spectra of Ar clusters.Ĭharacterization of sub-micron sized clusters in a supersonic gas jet using Mie scattering The Boltzmann equation and a detailed collisional radiative model are solved simultaneously as a function of time to model the time integrated X-ray spectra of the transient plasma.

To make these measurements possible, in addition to the effort to decrease a prepulse intensity using Pockels cell switches, micron-size clusters were produced using a specially designed conical nozzle. High resolution X-ray emission spectra of plasma created by laser irradiation of rare-gas (Ar, Kr, Xe) clusters have been measured at laser intensities over 10 W/cm and 30-fs pulse duration. X-ray radiation of clusters irradiated by ultrafast, high-intensity laser pulsesįukuda, Yuji Akahane, Yutaka Aoyama, Makoto Inoue, Norihiro* Ueda, Hideki Kishimoto, Yasuaki Yamakawa, Koichi Faenov, A. Generation of unprecedented amount of keV X rays from the laser-cluster interaction experiments with this nozzle and their accurate intensity dependences onvarious experimental parameters support the adequateness of the nozzle design. Based on the developed modeling, a three-staged nozzle, which cannot be modeled using the conventional model, is designed for the purpose of producing sufficient amount of micron-sized clusters. In order to confirm the advantage of the present model over a conventional model, a considerable amount of numerical computations has been carried out, and the results are compared with the data obtained from the Hagena's theory. The detailed nozzle geometry is also taken into account in this model. In this model, a cluster target is considered as a two-phase medium, consisting of the continuous gas phase and the discrete condensed phase (clusters). Times Cited Count：70 Percentile：92.46(Instruments & Instrumentation)Ī novel mathematical model for the investigations of a cluster formation process in a gas jet is presented, which enables us to obtain the detailed description of the spatial and temporal distributions of all cluster target parameters.

Ozzle specially for the lab