{"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":"3c28db6f-183e-4f7d-bee5-a2dbaf2f4f2b","name":"synchronising-optical-emission-spectroscopy-spokes-magnetron-sputtering-discharges","title":"Synchronising optical emission spectroscopy to spokes in magnetron sputtering discharges","author_email":"philipp.maass@rub.de","maintainer":"Research Data Repository","maintainer_email":"achim.vonkeudell@rub.de","license_title":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/","notes":"\u003Cp\u003ESpokes are patterns of increased light emission, observed to rotate in front of the targets of magnetron sputtering discharges. They move through the plasma at velocities of several km\/s in or against the E\u20d7 \u00d7 B\u20d7 direction of the discharge. The high velocity and their initial creation at arbitrary positions render measurements of spokes challenging. For more demanding plasma diagnostic techniques that require data acquisition over multiple discharge pulses, synchronisation to the spoke movement is necessary.\u003Cbr \/\u003E\nIn this publication, we present optical emission spectroscopy of spokes in both high power impulse magnetron sputtering (HiPIMS) as well as direct current magnetron sputtering (DCMS) discharges, performed by triggering an iCCD camera on the spoke movement. Optical filters between plasma and camera allow us to isolate emission lines of metal and working gas neutrals and ions.\u003Cbr \/\u003E\nBased on these optical measurements and previous probe studies, the dynamics of electrons drifting through spokes in both DCMS and HiPIMS is discussed. In HiPIMS, the much shorter mean free path for inelastic electron collisions enables strong ionisation inside the spoke, causing a sudden variation in electron density which leads to the distinct spoke shape. In contrast, the spoke shape for DCMS discharges seems to rather be indicative of electron energy variations.\u003C\/p\u003E\n","url":"https:\/\/rdpcidat.rub.de\/dataset\/synchronising-optical-emission-spectroscopy-spokes-magnetron-sputtering-discharges","state":"Active","log_message":"Update to resource HiPIMS Dataset","private":true,"revision_timestamp":"Thu, 05\/13\/2021 - 19:41","metadata_created":"Tue, 05\/11\/2021 - 13:21","metadata_modified":"Thu, 05\/13\/2021 - 19:41","creator_user_id":"ac3c153f-7c02-48e9-8aeb-becb100f5995","type":"Dataset","resources":[{"id":"fb0e6285-e4ef-4c2f-8735-2d272ae729e7","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/Data.zip","description":"\u003Cp\u003EThe zip-file contains raw images, processed differential emission images and current-voltage timetraces for HiPIMS.\u003Cbr \/\u003E\nThe files are marked according to the employed filters in spectroscopic notation:\u003Cbr \/\u003E\nAr I means Argon neutrals, while Al II means aluminium ions. This corresponds to following filters:\u003C\/p\u003E\n\u003Ctable\u003E\n\u003Cthead\u003E\n\u003Ctr\u003E\n\u003Cth\u003Especies\u003C\/th\u003E\n\u003Cth\u003Ewavelength [nm]\u003C\/th\u003E\n\u003Cth\u003Efilter width [nm]\u003C\/th\u003E\n\u003C\/tr\u003E\n\u003C\/thead\u003E\n\u003Ctbody\u003E\n\u003Ctr\u003E\n\u003Ctd\u003EAr I\u003C\/td\u003E\n\u003Ctd\u003E750\u003C\/td\u003E\n\u003Ctd\u003E1\u003C\/td\u003E\n\u003C\/tr\u003E\n\u003Ctr\u003E\n\u003Ctd\u003EAr II\u003C\/td\u003E\n\u003Ctd\u003E488\u003C\/td\u003E\n\u003Ctd\u003E3\u003C\/td\u003E\n\u003C\/tr\u003E\n\u003Ctr\u003E\n\u003Ctd\u003EAl I\u003C\/td\u003E\n\u003Ctd\u003E396\u003C\/td\u003E\n\u003Ctd\u003E3\u003C\/td\u003E\n\u003C\/tr\u003E\n\u003Ctr\u003E\n\u003Ctd\u003EAl II\u003C\/td\u003E\n\u003Ctd\u003E560\u003C\/td\u003E\n\u003Ctd\u003E9\u003C\/td\u003E\n\u003C\/tr\u003E\n\u003C\/tbody\u003E\n\u003C\/table\u003E\n\u003Cp\u003E\u0022Current_Voltage\u0022 contains discharge current and voltage time traces as .csv\u003C\/p\u003E\n\u003Cp\u003E\u0022Images_Head-on\u0022 and \u0022Images_Side-on\u0022 contain aquired iCCD images for the respective set-up:\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003E\u0022pulse-triggered\u0022 contains the iCCD images for each filter and unfiltered, with the camera triggered on the discharge pulse, as .spe\u003C\/li\u003E\n\u003Cli\u003E\u0022spoke-triggered\u0022 contains the iCCD images for each filter and unfiltered, each file containing different time delays between spoke detection and image acquisition, as .spe\u003C\/li\u003E\n\u003Cli\u003E\u0022differential_emission\u0022 contains the processed differential emission images for each filter and unfiltered, as .npy\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003E.spe files are Princeton Instruments WinView CCD image format as saved by the Andor iCCD camera used in the study\u003Cbr \/\u003E\n.npy are created by the Numpy package for Python 3\u003C\/p\u003E\n","format":"zip","state":"Active","revision_timestamp":"Thu, 05\/13\/2021 - 19:41","name":"HiPIMS Dataset","mimetype":"application\/zip","size":"217.43 MB","created":"Tue, 05\/11\/2021 - 13:30","resource_group_id":"ec8154f9-454d-4b85-895c-f5e010310847","last_modified":"Date changed  Thu, 05\/13\/2021 - 19:41"},{"id":"721e64f4-9242-4116-86a4-b0f14ae6af5c","revision_id":"","url":"https:\/\/rdpcidat.rub.de\/sites\/default\/files\/DCMS.zip","description":"\u003Cp\u003EThe zip-file contains raw images for DCMS.\u003Cbr \/\u003E\nThe files are marked according to the wavelength of the employed filters:\u003Cbr \/\u003E\nThis corresponds to following filters:\u003C\/p\u003E\n\u003Ctable\u003E\n\u003Cthead\u003E\n\u003Ctr\u003E\n\u003Cth\u003Especies\u003C\/th\u003E\n\u003Cth\u003Ewavelength [nm]\u003C\/th\u003E\n\u003Cth\u003Efilter width [nm]\u003C\/th\u003E\n\u003C\/tr\u003E\n\u003C\/thead\u003E\n\u003Ctbody\u003E\n\u003Ctr\u003E\n\u003Ctd\u003EAr I\u003C\/td\u003E\n\u003Ctd\u003E760\u003C\/td\u003E\n\u003Ctd\u003E10\u003C\/td\u003E\n\u003C\/tr\u003E\n\u003Ctr\u003E\n\u003Ctd\u003EAr II\u003C\/td\u003E\n\u003Ctd\u003E488\u003C\/td\u003E\n\u003Ctd\u003E3\u003C\/td\u003E\n\u003C\/tr\u003E\n\u003Ctr\u003E\n\u003Ctd\u003EAl I\u003C\/td\u003E\n\u003Ctd\u003E396\u003C\/td\u003E\n\u003Ctd\u003E3\u003C\/td\u003E\n\u003C\/tr\u003E\n\u003Ctr\u003E\n\u003Ctd\u003EAl II\u003C\/td\u003E\n\u003Ctd\u003E560\u003C\/td\u003E\n\u003Ctd\u003E9\u003C\/td\u003E\n\u003C\/tr\u003E\n\u003C\/tbody\u003E\n\u003C\/table\u003E\n\u003Cp\u003E\u0022Images_Head-on\u0022 contains aquired images as follows:\u003C\/p\u003E\n\u003Cul\u003E\n\u003Cli\u003E\u0022untriggered\u0022 contains the images for each filter and unfiltered, with the camera on internal trigger without synchronisation to the plasma, as .spe\u003C\/li\u003E\n\u003Cli\u003E\u0022spoke-triggered\u0022 contains the images for each filter and unfiltered, each file containing different time delays between spoke detection and image acquisition, as .spe\u003C\/li\u003E\n\u003C\/ul\u003E\n\u003Cp\u003E.spe files are Princeton Instruments WinView CCD image format as saved by the Andor iCCD camera used in the study\u003C\/p\u003E\n","format":"zip","state":"Active","revision_timestamp":"Thu, 05\/13\/2021 - 19:41","name":"DCMS Dataset","mimetype":"application\/zip","size":"36.82 MB","created":"Tue, 05\/11\/2021 - 13:40","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":"c552fb50-869c-48ed-92b6-c33657520854","vocabulary_id":"2","name":"Spokes"},{"id":"b97e65e5-f71b-4952-8e68-b0541986c7aa","vocabulary_id":"2","name":"oes"},{"id":"097ab695-fe9a-4a01-83cc-fed3336dc0f8","vocabulary_id":"2","name":"optical emission spectroscopy"},{"id":"3141dcea-67d6-42f0-a517-cf135248188b","vocabulary_id":"2","name":"DCMS"},{"id":"f324ca40-0b99-424f-9f81-814fc6c1b0e4","vocabulary_id":"2","name":"magnetron sputtering"}],"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"}]}]}