{"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":"db481158-b4eb-4945-b6ce-da7adbabca72","name":"electron-density-temperature-and-potential-structure-spokes-hipims","title":"Electron density, temperature and the potential structure of spokes in HiPIMS","author_email":"julian.held@rub.de","maintainer":"Research Data Repository","maintainer_email":"achim.vonkeudell@rub.de","license_title":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/","notes":"\u003Cp\u003EIn high power impulse magnetron sputtering (HiPIMS) bright plasma spots are observed during the discharge pulses that rotate with velocities in the order of 10 km s \u22121 in front of the target surface. It has proven very difficult to perform any quantitative measurements on these so-called spokes, which emerge stochastically during the build-up of each plasma pulse. In this paper, we propose a new time shift averaging method to perform measurements integrating over many discharge pulses, but without phase averaging of the spoke location, thus preserving the information of the spoke structure. This method is then applied to perform Langmuir probe measurements, employing magnetized probe theory to determine the plasma parameters inside the magnetic trap region of the discharge. Spokes are found to have a higher plasma density, electron temperature and plasma potential than the surrounding plasma. The electron density slowly rises at the leading edge of the spoke to a maximum value of about 1e20 m \u22123 and then drops sharply at the trailing edge to 4e19 m \u22123 . The electron temperature rises from 2.1 eV outside the spoke to 3.4 eV at the trailing end of the spoke. A reversal of the plasma potential from about \u22127 V outside the spoke to values just above 0 V in a spoke is observed, as has been proposed in the literature.\u003C\/p\u003E\n","url":"https:\/\/rdpcidat.rub.de\/dataset\/electron-density-temperature-and-potential-structure-spokes-hipims","state":"Active","log_message":"Update to resource Current and Voltage","private":true,"revision_timestamp":"Thu, 05\/13\/2021 - 19:41","metadata_created":"Wed, 01\/27\/2021 - 11:07","metadata_modified":"Thu, 05\/13\/2021 - 19:41","creator_user_id":"c1043ad4-3d77-4d1a-95fa-f93c8c85b0b7","type":"Dataset","resources":[{"id":"4cf5de34-b309-457d-84f1-3bd1a0c35757","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/6_3mm_target_distance.txt","description":"\u003Cp\u003EResults from the fitted probe I-V characteristic.\u003Cbr \/\u003E\nColumns are: time in \u00b5s, electron density per cubic meter, electron temperature in eV, plasma potential of electrons in volt, space potential of ions in volt, floating potential in volt and psi0 as a number. Psi0 relates to the reduction of electron current by the diffusion limiting magnetic field.\u003C\/p\u003E\n","format":"txt","state":"Active","revision_timestamp":"Fri, 01\/29\/2021 - 15:57","name":"Plasma parameters as a function of time for the position z=6.3 mm","mimetype":"text\/plain","size":"305.4 KB","created":"Wed, 01\/27\/2021 - 14:30","resource_group_id":"ec8154f9-454d-4b85-895c-f5e010310847","last_modified":"Date changed  Fri, 01\/29\/2021 - 15:57"},{"id":"0dacca3a-dfae-4e10-8584-834791a088fd","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/8_0mm_target_distance.txt","description":"\u003Cp\u003EResults from the fitted probe I-V characteristic.\u003Cbr \/\u003E\nColumns are: time in \u00b5s, electron density per cubic meter, electron temperature in eV, plasma potential of electrons in volt, space potential of ions in volt, floating potential in volt and psi0 as a number. Psi0 relates to the reduction of electron current by the diffusion limiting magnetic field.\u003C\/p\u003E\n","format":"txt","state":"Active","revision_timestamp":"Fri, 01\/29\/2021 - 15:57","name":"Plasma parameters as a function of time for the position z=8.0 mm","mimetype":"text\/plain","size":"305.51 KB","created":"Wed, 01\/27\/2021 - 14:34","resource_group_id":"ec8154f9-454d-4b85-895c-f5e010310847","last_modified":"Date changed  Fri, 01\/29\/2021 - 15:57"},{"id":"c01472de-461e-4572-a9c4-ee40d8a45f6a","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/9_7mm_target_distance.txt","description":"\u003Cp\u003EResults from the fitted probe I-V characteristic.\u003Cbr \/\u003E\nColumns are: time in \u00b5s, electron density per cubic meter, electron temperature in eV, plasma potential of electrons in volt, space potential of ions in volt, floating potential in volt and psi0 as a number. Psi0 relates to the reduction of electron current by the diffusion limiting magnetic field.\u003C\/p\u003E\n","format":"txt","state":"Active","revision_timestamp":"Fri, 01\/29\/2021 - 15:57","name":"Plasma parameters as a function of time for the position z=9.7 mm","mimetype":"text\/plain","size":"305.55 KB","created":"Wed, 01\/27\/2021 - 14:37","resource_group_id":"ec8154f9-454d-4b85-895c-f5e010310847","last_modified":"Date changed  Fri, 01\/29\/2021 - 15:57"},{"id":"120d7189-f175-4ae4-be36-d71c532d494f","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/currvol.txt","description":"\u003Cp\u003ETextfile containing pulse current and voltage traces. Current measured in the cable using a Tektronix TCP404XL probe. Voltage measured as close as possible to the magnetron using a Tektronix P6015A. Traces acquired using a Tektronix TPS 2024 oscilloscope.\u003C\/p\u003E\n","format":"txt","state":"Active","revision_timestamp":"Thu, 05\/13\/2021 - 19:41","name":"Current and Voltage","mimetype":"text\/plain","size":"199.57 KB","created":"Wed, 04\/14\/2021 - 09:55","resource_group_id":"ec8154f9-454d-4b85-895c-f5e010310847","last_modified":"Date changed  Thu, 05\/13\/2021 - 19:41"}],"tags":[{"id":"50820183-cedf-4e0f-9583-d328abf18ebd","vocabulary_id":"2","name":"HiPIMS"},{"id":"7c3d81bd-2eb6-48ca-bf94-8700c7465b45","vocabulary_id":"2","name":"electron density"},{"id":"5c0d2f31-5ff1-4195-84dc-1db960a0c6a7","vocabulary_id":"2","name":"electron temperature"},{"id":"0e9255a3-d974-455b-9a93-b14c00399522","vocabulary_id":"2","name":"plasma potential"},{"id":"e07c8e9e-8237-4b53-aecb-5707162e5271","vocabulary_id":"2","name":"Langmuir Probe"},{"id":"f324ca40-0b99-424f-9f81-814fc6c1b0e4","vocabulary_id":"2","name":"magnetron sputtering"},{"id":"c552fb50-869c-48ed-92b6-c33657520854","vocabulary_id":"2","name":"Spokes"}],"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"}]}]}