{"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":"d2114d1f-3e62-4145-8f68-096e14049610","name":"electric-field-measurements-hen2-nanosecond-pulsed-discharge-sub-ns-time-resolution","title":"Electric field measurements  in a He:N2 nanosecond pulsed discharge with sub-ns time resolution","author_email":"nikita.lepikhin@rub.de","maintainer":"Research Data Repository","maintainer_email":"achim.vonkeudell@rub.de","license_title":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/","notes":"\u003Cp\u003EThe electric field in the He:N_2 nanosecond Atmospheric Pressure Plasma Jet (ns-APPJ) is studied using Electric-Field Induced Second Harmonic generation (E-FISH) technique. It is shown that the  calibration  obtained  with a DC voltage applied to the discharge cell may lead to incorrect results of the electric field measurements. It is proposed to use nanosecond high voltage pulses at low repetition rates  for the calibration instead of a DC voltage. The temporal development of the  electric field in the discharge at different distances from the cathode is measured with high temporal (100~ps) and spatial (50~\u00b5m) resolution. An electric field profile structure similar to the one in streamers or ionization fronts is observed. The velocity of the propagation of the falling edge  of the ionization front  is determined as  0.85x10^6 m\/s. The validity of the local field approximation, important for modeling of these kind of discharges, is confirmed for the  present conditions  based on time and space derivatives of the measured electric field. The temporal evolution of the electron density is obtained by the measured electrical current and the time resolved electric field measurement combined with the electron mobility calculated with BOLSIG+.\u003C\/p\u003E\n","url":"https:\/\/rdpcidat.rub.de\/dataset\/electric-field-measurements-hen2-nanosecond-pulsed-discharge-sub-ns-time-resolution","state":"Active","log_message":"Edited by kd.","private":true,"revision_timestamp":"Wed, 02\/09\/2022 - 10:32","metadata_created":"Mon, 02\/08\/2021 - 14:34","metadata_modified":"Wed, 02\/09\/2022 - 10:32","creator_user_id":"78a19c3d-c314-4aa7-827b-86ed40f1a5b9","type":"Dataset","resources":[{"id":"1c642f60-0204-43f9-a72c-a6c02e5b7cb5","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/fig%202a.txt","description":"\u003Cp\u003EVoltage and electric current  waveforms in the discharge together with the voltage pulse recorded without the discharge .\u003C\/p\u003E\n","format":"txt","state":"Active","revision_timestamp":"Wed, 02\/10\/2021 - 14:24","name":"fig 2a","mimetype":"text\/plain","size":"69.92 KB","created":"Mon, 02\/08\/2021 - 14:44","resource_group_id":"295bcc10-edab-46be-bd9b-6d94d38e8298","last_modified":"Date changed  Wed, 02\/10\/2021 - 14:24"},{"id":"ba14e886-bf0a-4fe9-970a-b73373f4da2f","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/fig%202b.txt","description":"\u003Cp\u003EThe signal from the current probe with and without  the discharge  together with the profile  used to correct the current waveform, see the text.\u003C\/p\u003E\n","format":"txt","state":"Active","revision_timestamp":"Wed, 02\/10\/2021 - 14:24","name":"fig 2b","mimetype":"text\/plain","size":"39.87 KB","created":"Mon, 02\/08\/2021 - 14:47","resource_group_id":"295bcc10-edab-46be-bd9b-6d94d38e8298","last_modified":"Date changed  Wed, 02\/10\/2021 - 14:24"},{"id":"7c2317b9-1c59-4610-aa02-371c3b28a20c","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/fig%203a.txt","description":"\u003Cp\u003ECalibration curve used for the E-FISH measurements obtained with rectangular ns-pulses at 10 Hz: measured second harmonic intensity as a function of square  of applied Laplacian electric field strength    together with the linear fit\u003C\/p\u003E\n","format":"txt","state":"Active","revision_timestamp":"Wed, 02\/10\/2021 - 14:25","name":"fig 3a","mimetype":"text\/plain","size":"38.19 KB","created":"Mon, 02\/08\/2021 - 14:54","resource_group_id":"295bcc10-edab-46be-bd9b-6d94d38e8298","last_modified":"Date changed  Wed, 02\/10\/2021 - 14:25"},{"id":"38ae7b22-6af3-4bde-8d7d-25f16a763709","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/fig%203b.txt","description":"\u003Cp\u003ESlopes of the calibrations curves obtained at different repetition rates of short HV pulses applied to the electrodes normalized by the slope corresponding to the DC voltage, see the text.\u003C\/p\u003E\n","format":"txt","state":"Active","revision_timestamp":"Mon, 02\/22\/2021 - 10:59","name":"fig 3b","mimetype":"text\/plain","size":"831 bytes","created":"Mon, 02\/08\/2021 - 15:07","resource_group_id":"295bcc10-edab-46be-bd9b-6d94d38e8298","last_modified":"Date changed  Mon, 02\/22\/2021 - 10:59"}],"tags":[{"id":"16a4af24-5501-443e-ac04-4f65987e55da","vocabulary_id":"2","name":"helium\/nitrogen  plasma"},{"id":"a9fac56b-cb04-4ab5-b46b-ee2ace4221b6","vocabulary_id":"2","name":"nanosecond discharge"},{"id":"6ea8c330-1e20-4585-a5f7-05aa778976c0","vocabulary_id":"2","name":"APPJ"},{"id":"608b60c9-8055-426e-b8ad-58aa4a1cc852","vocabulary_id":"2","name":"electric field"},{"id":"5931be02-374c-45e8-ad3e-2db38aadb8f2","vocabulary_id":"2","name":"E-FISH"},{"id":"029f942a-b7ec-4d8c-a522-0570cd0f45ff","vocabulary_id":"2","name":"calibration"},{"id":"7c3d81bd-2eb6-48ca-bf94-8700c7465b45","vocabulary_id":"2","name":"electron density"}],"groups":[{"description":"\u003Cp\u003EChair experimental physics V \u0022atom and laser physics\u0022 at the faculty of physics and astronomy at Ruhr University Bochum\u003C\/p\u003E\n","id":"295bcc10-edab-46be-bd9b-6d94d38e8298","image_display_url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/rublogoweiss_1.png","title":"EP5","name":"group\/ep5"}]}]}