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Invited article: advanced drag-free concepts for future space-based interferometers: acceleration noise performance.

D Gerardi1, G Allen2, J W Conklin3

  • 1Astrium Satellites, Claude-Dornier-Strasse, Friedrichshafen 88090, Germany.

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Summary
This summary is machine-generated.

Future space missions need advanced Gravitational Reference Sensors (GRS) for precise measurements. This study explores new GRS designs to improve disturbance reduction for gravitational physics experiments beyond the Laser Interferometer Space Antenna (LISA).

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Area of Science:

  • Space-based gravitational physics experiments
  • Advanced sensor technology development

Background:

  • Future drag-free missions demand highly sensitive Gravitational Reference Sensors (GRS).
  • The current Laser Interferometer Space Antenna (LISA) baseline uses a dual-cubical sensor configuration.
  • Ongoing research explores alternative GRS concepts for enhanced disturbance reduction.

Purpose of the Study:

  • To discuss disturbance reduction requirements for LISA and future missions.
  • To investigate novel payload concepts for improved low-frequency acceleration noise reduction.
  • To compare the performance of different GRS designs for space-based detectors.

Main Methods:

  • Review of disturbance reduction requirements for gravitational physics missions.
  • Description and analysis of four distinct payload concepts.
  • Comparison of expected strain sensitivities, focusing on acceleration noise-dominated low frequencies.

Main Results:

  • Identified key challenges in achieving ultra-low acceleration noise for future missions.
  • Compared the potential of different GRS designs to meet stringent disturbance reduction goals.
  • Evaluated the trade-offs associated with each concept for space-based detector applications.

Conclusions:

  • Several promising GRS concepts offer potential improvements over the LISA baseline.
  • Understanding and minimizing acceleration noise is critical for advancing space-based gravitational physics.
  • Further investigation is needed to determine the optimal GRS design for future missions.