STEREO database of interplanetary Langmuir electric waveforms. Issue 2 (6th February 2016)

• Record Type: Journal Article
• Authors: Briand, C.; Henri, P.; Génot, V.; Lormant, N.; Dufourg, N.; Cecconi, B.; Nguyen, Q. N.; Goetz, K.
• Is Part Of: Journal of geophysical research. Volume 121:Issue 2(2016:Feb.)
• Page Start: 1062
• Page End: 1070
• Publication Date: 2016-02-06
• Subjects: plasma waves and turbulence -- solar wind plasma -- radio emissions; Magnetospheric physics -- Periodicals; Space environment -- Periodicals; Cosmic physics -- Periodicals; Planets -- Atmospheres -- Periodicals; Heliosphere (Astrophysics) -- Periodicals; Geophysics -- Periodicals; 523.01
• DOI: 10.1002/2015JA022036
• Languages: English
• ISSNs: 2169-9380

Abstract

Abstract: This paper describes a database of electric waveforms that is available at the Centre de Données de la Physique des Plasmas (CDPP, http://cdpp.eu/ ). This database is specifically dedicated to waveforms of Langmuir/Z‐mode waves. These waves occur in numerous kinetic processes involving electrons in space plasmas. Statistical analysis from a large data set of such waves is then of interest, e.g., to study the relaxation of high‐velocity electron beams generated at interplanetary shock fronts, in current sheets and magnetic reconnection region, the transfer of energy between high and low frequencies, the generation of electromagnetic waves. The Langmuir waveforms were recorded by the Time Domain Sampler (TDS) of the WAVES radio instrument on board the STEREO mission. In this paper, we detail the criteria used to identify the Langmuir/Z‐mode waves among the whole set of waveforms of the STEREO spacecraft. A database covering the November 2006 to August 2014 period is provided. It includes electric waveforms expressed in the normalized frame B, B × V sw, B × B × V sw with B and V s w the local magnetic field and solar wind velocity vectors, and the local magnetic field in the variance frame, in an interval of ±1.5 min around the time of the Langmuir event. Quicklooks are also provided that display the three components of the electric waveforms together with the spectrum of E ∥, together with the magnitude and components of the magnetic field in the 3 min interval, in the variance frame. Finally, the distribution of the Langmuir/Z‐mode waves peak amplitude is also analyzed. Key Points: This paper describes a database of Langmuir/Z‐mode waveforms, available at the CDPP The Langmuir waveforms were recorded by the WAVES/TDS instrument on board the STEREO mission The peak amplitude distribution of 11, 675 Langmuir/Z‐mode waves is also analyzed