The FIELDS Instrument Suite for Solar Probe Plus: Measuring the Coronal Plasma and Magnetic Field, Plasma Waves and Turbulence, and Radio Signatures of Solar Transients.

NASA's Solar Probe Plus (SPP) mission will make the first in situ measurements of the solar corona and the birthplace of the solar wind. The FIELDS instrument suite on SPP will make direct measurements of electric and magnetic fields, the properties of in situ plasma waves, electron density and temperature profiles, and interplanetary radio emissions, amongst other things. Here, we describe the scientific objectives targeted by the SPP/FIELDS instrument, the instrument design itself, and the instrument concept of operations and planned data products

Erratum: The solar orbiter radio and plasma waves (RPW) instrument (Astronomy and Astrophysics (2020) 642 (A12) DOI: 10.1051/0004-6361/201936214)

The erratum concerns Fig. 9 entitled "Antenna radio-electrical properties" for which some of the parameters are not correct. The new figure with new parameters is provided in Fig. 1 of this corrigendum. Fig. 1. Corrected Antenna radio-electrical properties. (Figure Presented)

A movable dynode electron multiplier for the detection of radioactive ions in an on-line mass spectrometer

It is shown that an aluminized mylar tape may be used as the first dynode (ion to electron converter) of an electron multiplier. When the tape is moved, a clean converter surface is exposed to the incident beam, which avoids the strong source of background consisting in implanted radioactive atoms

The PS on-line mass spectrometer dedicated to the study of the exotic light nuclei

The experiments performed with the PS on-line mass spectrometer: atomic hyperfine structure determinations and nuclear spectroscopy of Li, Na and K isotopes require high efficiency and as low as possible radioactive background in the area of the detectors. A view of the lay-out will be given concerning in particular the very thick iron and concrete shielding and the mass separated ion beam line going through the shielding from the mass spectrometer to the detector room. This device is an L-shaped pipe with electrostatic focusing elements. The background correlated with the proton beam pulse is lower than the sensitivity of the γ detector and the neutron flux is less than 1 n/cm2s. Slow rate events, corresponding to nuclei far from the stability, such as 34Na, are recorded with a good signal-to-noise ratio

The radiofrequency mass spectrometer for the comparison of proton-antiproton masses

The radiofrequency mass spectrometer has been prepared in Orsay, and moved to CERN to be installed on-line with LEAR (PS189). The present and finally expected performances are given