Home Print this page Phone directory Site Map Credits RSS feed Twitter Maps Contact us Phone directory Webmail Intranet Logo

Home > About us > Media > Archived news > 2014 > In their launch configuration, scheduled for March 2015: last tests successful for MMS and LPP search coil magnetometer

In their launch configuration, scheduled for March 2015: last tests successful for MMS and LPP search coil magnetometer

Like Cluster mission, MMS mission consists of four identical satellites that will evolve in tetrahedral formation in the Earth’s magnetic environment (magnetosphere) to provide a three-dimensional description with high spatial and temporal resolution of the interaction between the charged particles and the magnetic field. The density of charged particles forming the Earth’s magnetospheric plasma is very small, thus collisions between them are very rare. However, they have a collective behaviour due to their interaction with the electric or magnetic fields, in particular the terrestrial magnetic field. These particles may also be accelerated, heated and transported as a consequence of their interaction with electrostatic or electromagnetic waves. The electromagnetic waves are therefore crucial to understand the dynamics of the plasma. The LPP has achieved, with the financial support of CNES (the French Space Agency) 5 tri-axis sets of magnetic antennas (sensors and preamplifiers; see pictures below) that will measure the magnetic field fluctuations in the 1 Hz - 6 kHz frequency range, constituting the MMS SCM experiment (Search Coil Magnetometer). In order to avoid interferences, due to spacecraft or other instruments operations, these antennas are mounted on a rigid boom at 4 meters of the satellite body.

JPEG - 109.2 kb
One of the five tri-axis search coil type magnetic sensors (left) and associated preamplifiers (right) made at LPP.
Copyright LPP

Once the magnetic antennas mounted on the satellites, each spacecraft has been tested in temperature.

JPEG - 226.8 kb
Before the final vibration test: one MMS satellite exits the thermal vacuum chamber, while another one is ready to replace it.
Copyright NASA

More details on the LPP and NASA
Contacts: Olivier Le Contel ; Paul Leroy


transparent
Tutelles : CNRS Ecole Polytechnique Sorbonne Université Université Paris Sud Observatoire de Paris Convention : CEA
transparent
©2009-2019 Laboratoire de Physique des Plasmas (LPP)

Legal notices
Website operator: Laboratoire de Physique des Plasmas, Ecole Polytechnique route de Saclay F-91128 PALAISEAU CEDEX
Website host: Laboratoire de Physique des Plasmas, Ecole Polytechnique route de Saclay F-91128 PALAISEAU CEDEX
Managing editor: Pascal Chabert (Director)