{"help":"Return the metadata of a dataset (package) and its resources. :param id: the id or name of the dataset :type id: string","success":true,"result":[{"id":"914269d2-7003-4c31-b92d-ee17a23d5fbf","name":"nanosecond-pulsed-discharges-distilled-water-part-ii-line-emission-and-plasma-propagation","title":"Nanosecond pulsed discharges in distilled water - Part II: Line emission and plasma propagation","author_email":"Achim.vonKeudell@rub.de","maintainer":"Research Data Repository","maintainer_email":"achim.vonkeudell@rub.de","license_title":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/","notes":"\u003Cp\u003ENanosecond plasmas in liquids can initiate chemical processes that are\u003Cbr \/\u003E\nexploited in the elds of water treatment, electrolysis or biomedical applications. The\u003Cbr \/\u003E\nunderstanding of these chemical processes relies on unraveling the dynamics of the\u003Cbr \/\u003E\nvariation of pressures, temperatures and species densities during the dierent stages\u003Cbr \/\u003E\nof plasma ignition and plasma propagation as well as the conversion of the liquid into\u003Cbr \/\u003E\nthe plasma state and the gas phase. This is analyzed by monitoring the emission of\u003Cbr \/\u003E\nnanosecond pulsed plasmas that are generated by high voltages (HV) of 20 kV and\u003Cbr \/\u003E\npulse lengths of 10 ns applied to a tungsten tip with 50 micrometer diameter immersed in water.\u003Cbr \/\u003E\nThe spectra are acquired with a temporal resolution of 2 ns and the emission pattern\u003Cbr \/\u003E\nis modelled by a combination of black body radiation from the hot tungsten tip and\u003Cbr \/\u003E\nthe pronounced emission lines of the hydrogen Balmer series. The data indicate two\u003Cbr \/\u003E\ncontributions of the hydrogen line radiation that dier with respect to the degree of\u003Cbr \/\u003E\nself-absorption. It is postulated that one contribution originates from a recombination\u003Cbr \/\u003E\nregion showing strong self absorption and one contribution from a ionization region\u003Cbr \/\u003E\nshowing very little self-absorption. The emission lines from the ionization region are\u003Cbr \/\u003E\nevaluated assuming Stark broadening, that yielded electron densities up to 5 x 10^25\u003Cbr \/\u003E\nm^-3. The electron density evolution follows the same trend as the temporal evolution\u003Cbr \/\u003E\nof the voltage applied to the tungsten tip. The propagation mechanism of the plasma\u003Cbr \/\u003E\nis similar to that of a positive streamer in the gas phase, although in the liquid phase\u003Cbr \/\u003E\nfield effects such as electron transport by tunneling should play an important role.\u003C\/p\u003E\n","url":"https:\/\/rdpcidat.rub.de\/dataset\/nanosecond-pulsed-discharges-distilled-water-part-ii-line-emission-and-plasma-propagation","state":"Active","log_message":"Edited by kd.","private":true,"revision_timestamp":"Sat, 03\/25\/2023 - 19:46","metadata_created":"Thu, 09\/03\/2020 - 17:04","metadata_modified":"Sat, 03\/25\/2023 - 19:46","creator_user_id":"97d4ca9e-d6a4-435e-b2fa-290a5ce8358c","type":"Dataset","resources":[{"id":"057f46aa-1c5b-40dd-be16-9163190db13d","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/nedensity_0.csv","description":"\u003Cp\u003EElectron density in m^-3 from Stark broadening measured every 2 ns (Fig. 7a in the paper)\u003C\/p\u003E\n","format":"csv","state":"Active","revision_timestamp":"Thu, 09\/03\/2020 - 17:11","name":"Electron density","mimetype":"text\/csv","size":"605 bytes","created":"Thu, 09\/03\/2020 - 17:07","resource_group_id":"ec8154f9-454d-4b85-895c-f5e010310847","last_modified":"Date changed  Thu, 09\/03\/2020 - 17:11"},{"id":"6862ad95-2fbb-4690-8db7-4cae075e77cc","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/continuumspectra_backgroundsubst.csv","description":"\u003Cp\u003ELine Spectra after subtracting the continuum part. Spectra every 2 ns.\u003C\/p\u003E\n","format":"csv","state":"Active","revision_timestamp":"Thu, 09\/03\/2020 - 17:32","name":"Line Spectra","mimetype":"text\/csv","size":"641.32 KB","created":"Thu, 09\/03\/2020 - 17:31","resource_group_id":"ec8154f9-454d-4b85-895c-f5e010310847","last_modified":"Date changed  Thu, 09\/03\/2020 - 17:32"}],"tags":[{"id":"56290f0c-c830-42cb-9364-2509d0cca816","vocabulary_id":"2","name":"cavitation"}],"groups":[{"description":"\u003Cp\u003EThe group \u0022Experimental Physics II - Reactive Plasmas\u0022 at the faculty of physics and astronomy at Ruhr University Bochum.\u003C\/p\u003E\n","id":"ec8154f9-454d-4b85-895c-f5e010310847","image_display_url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/rublogoweiss_0.png","title":"EP2","name":"group\/ep2"}]}]}