{"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":"2e1e5452-fd7e-4330-8915-87d305813f48","name":"nanosecond-pulsed-discharges-distilled-water-part-i-continuum-radiation-and-plasma-ignition","title":"Nanosecond pulsed discharges in distilled water - Part I: Continuum radiation and plasma ignition","author":"Achim von Keudell","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 are an important method to trigger the water chemistry for electrolysis or for biomedical applications in plasma medicine. The understanding of these chemical processes relies on knowing the variation of the temperatures in these dynamic plasmas. This is analyzed by monitoring nanosecond pulsed plasmas that are generated by high voltages (HV) at 20 kV and pulse lengths of 10 ns applied to a tungsten tip with 50 micrometer diameter immersed in water. Plasma emission is analyzed by optical emission spectroscopy (OES) ranging from UV wavelengths of 250 nm to visible wavelengths of 850 nm at a high temporal resolution of 2 ns. The spectra are dominated by the black body continuum from the hot tungsten surface and line emissions from the hydrogen Balmer series. Typical temperatures of up to 6000 K to 8000 K are reached for the tungsten surface corresponding to the boiling temperature of tungsten at varying tungsten vapor pressures. The analysis of the ignition process and the concurrent spectral features indicate that the plasma is initiated by field ionization of water molecules at the electrode surface. At the end of the pulse, field emission of electrons can occur. During the plasma pulse, it is postulated that the plasma contracts locally at the electrode surface forming a hot spot. This causes a characteristic contribution to the continuum emission at small wavelengths.\u003C\/p\u003E\n","url":"https:\/\/rdpcidat.rub.de\/dataset\/nanosecond-pulsed-discharges-distilled-water-part-i-continuum-radiation-and-plasma-ignition","state":"Active","log_message":"Edited by kd.","private":true,"revision_timestamp":"Sun, 03\/21\/2021 - 18:43","metadata_created":"Mon, 12\/23\/2019 - 07:42","metadata_modified":"Sun, 03\/21\/2021 - 18:43","creator_user_id":"97d4ca9e-d6a4-435e-b2fa-290a5ce8358c","type":"Dataset","resources":[{"id":"e4cfa669-0d60-4d10-99c4-7da0057ccb36","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/SFB1316_B7_2020_D1_R1_OES.csv","description":"\u003Cp\u003EThe time-resolved emission spectra of the first 34 ns after plasma ignition for a nanosecond pulsed plasma with approximately 15 ns width and 2-3 ns rising times at 20 kV and 15 Hz.\u003C\/p\u003E\n","format":"csv","state":"Active","revision_timestamp":"Sun, 03\/21\/2021 - 14:39","name":"Continuum Spectra (dt =2ns)","mimetype":"text\/csv","size":"880.91 KB","created":"Mon, 12\/23\/2019 - 07:46","resource_group_id":"ec8154f9-454d-4b85-895c-f5e010310847","last_modified":"Date changed  Sun, 03\/21\/2021 - 14:39"},{"id":"c264fe1a-aafc-49db-bba0-0a5c8bf91c9a","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/SFB1316_B7_2020_D1_R2_VI.csv","description":"\u003Cp\u003EVI as measured with a BCS for a 12 m cable (BCS location at 6 m). First column is time in (ns), second amplitude of the signal, third current (A) and fourth column voltage in (kV).\u003C\/p\u003E\n","format":"csv","state":"Active","revision_timestamp":"Sun, 03\/21\/2021 - 14:41","name":"VI Curve","mimetype":"text\/csv","size":"19.91 MB","created":"Sat, 12\/28\/2019 - 17:08","resource_group_id":"ec8154f9-454d-4b85-895c-f5e010310847","last_modified":"Date changed  Sun, 03\/21\/2021 - 14:41"}],"tags":[{"id":"a6933307-e04a-408e-a4d5-8f6330c8173d","vocabulary_id":"2","name":"plasma in liquids"}],"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"}]}]}