64 research outputs found
Heliospheric influences on LISA
No full textLaser interferometer space antenna (LISA) is the first interferometer devoted to the detection of low frequency gravitational waves in space. Control of the environment and the study of the effects of energetic particles traversing the LISA apparatus are mandatory for this experiment to be fully successful. Telescopes for solar and cosmic-ray particle monitoring will be placed on board LISA and its precursor mission LISA Pathfinder (LISA-PF). In particular, proton, helium and electron detection is recommended on LISA. In this paper, we report expected incident galactic proton and helium fluxes at the time of LISA and LISA-PF missions. The number of solar events with the fluence ranging between 10^(6) and 10^(11) protons cm^(-2) above 30 MeV occurring during the LISA missions is estimated as well. Finally, we discuss the importance of electron detection on LISA to forecast upcoming solar energetic protons
Heliospheric influences on LISA
No full textLaser interferometer space antenna (LISA) is the first interferometer devoted to the detection of low frequency gravitational waves in space. Control of the environment and the study of the effects of energetic particles traversing the LISA apparatus are mandatory for this experiment to be fully successful. Telescopes for solar and cosmic-ray particle monitoring will be placed on board LISA and its precursor mission LISA Pathfinder (LISA-PF). In particular, proton, helium and electron detection is recommended on LISA. In this paper, we report expected incident galactic proton and helium fluxes at the time of LISA and LISA-PF missions. The number of solar events with the fluence ranging between 10(6) and 10(11) protons cm(-2) above 30 MeV occurring during the LISA missions is estimated as well. Finally, we discuss the importance of electron detection on LISA to forecast upcoming solar energetic protons
LISA and LISA PathFinder, the endeavour to detect low frequency GWs
No full textThis is a review about LISA and its technology demonstrator, LISA PathFinder. We first describe the conceptual problems which need to be overcome in order to set up a working interferometric detector of low frequency Gravitational Waves (GW), then summarise the solutions to them as currently conceived by the LISA mission team. This will show that some of these solutions require new technological abilities which are still under development, and which need proper test before being fully implemented. LISA PathFinder (LPF) is the the testbed for such technologies. The final part of the paper will address the ideas and concepts behind the PathFinder as well as their impact on LISA
Data and Diagnostics in LISA PathFinder
No full textThe Diagnostics measurement set is a subsystem of the LTP which is intended to monitor a number of spurious disturbances, even if the satellite complies with all cleanliness requirements. It monitors thermal and magnetic perturbations, and incorporates a charged particle counter. The purpose of this communication is to discuss the conceptual aspects of the mentioned subsystem, and to summarise its current status of development.Peer reviewe
Design and characterization of the monolithic matrices of the H35DEMO chip
No full textThe H35DEMO chip is a HV/HR-MAPS demonstrator of 18.49 mm x 24.4 mm, fabricated with a 0.35 µm HVCMOS process from AMS in four different substrate resistivities. The chip is divided into four independent matrices with a pixel size of 50 µm x 250 µm. Two of the matrices are fully monolithic and include the digital readout electronics at the periphery. This contribution describes the two standalone matrices of the H35DEMO chip and presents results of the beam tests carried out with unirradiated and irradiated samples with different substrate resistivities
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