LiteBIRD

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LiteBIRD
Mission typeSpace observation
OperatorJAXA / ISAS
Websitewww.isas.jaxa.jp/en/missions/spacecraft/future/litebird.html
Mission durationPlanned: 3 years
Spacecraft properties
ManufacturerInstitute of Space and Astronautical Science
Dry massApprox. 450 kg [1]
Power< 500 W [1]
Start of mission
Launch date2032 (planned)[2]
RocketH3
Launch siteTanegashima LA-Y2
ContractorMitsubishi Heavy Industries
Main
DiameterLFT: 40 cm[3]
HFT: 20 cm[3]
Focal length~1,100 mm [4]
Transponders
Capacity10 Gb/day [1]
Instruments
Superconducting
MMX
 

LiteBIRD (Lite (Light) satellite for the studies of B-mode polarization and Inflation from cosmic background Radiation Detection) is a planned small space observatory that aims to detect the footprint of the primordial gravitational wave on the cosmic microwave background (CMB) in a form of polarization pattern called B-mode.

LiteBIRD and

Lagrangian point L2.[2][8]

Overview

primordial gravitational waves were created during the inflationary era, about 10−38 second after the beginning of the universe.[9] The primordial gravitational waves are expected to be imprinted in the CMB polarization map as special patterns, called the B-mode.[9] Measurements of polarization of the CMB radiation are considered as the best probe to detect the primordial gravitational waves,[10] that could bring a profound knowledge on how the Universe began, and may open a new era of testing theoretical predictions of quantum gravity, including those by the superstring theory.[9]

The science goal of LiteBIRD is to measure the CMB polarization over the entire sky with the sensitivity of δr <0.001, which allows testing the major single-field slow-roll inflation models experimentally.[1][11] The design concept is being studied by an international team of scientists from Japan, U.S., Canada and Europe.[5][12]

Telescopes

In order to separate CMB from the galactic emission, the measurements will cover 40 GHz to 400 GHz during a 3-year full sky survey using two telescopes on LiteBIRD.[3][5] The Low Frequency Telescope (LFT) covers 40 GHz to 235 GHz, and the High Frequency Telescope (HFT) covers 280 GHz to 400 GHz. LFT has a 400 mm aperture Crossed-Dragone telescope, and HFT has a 200 mm aperture on-axis refractor with two silicon lenses.[3][5][13] The baseline design considers an array of 2,622 superconducting polarimetric detectors.[3][13] The entire optical system will be cooled down to approximately 5 K (−268.15 °C; −450.67 °F) to minimize the thermal emission,[14] and the focal plane is cooled to 100 mK with a two-stage sub-Kelvin cooler.[3]

See also

References

  1. ^
    doi:10.1117/12.926743
  2. ^ a b "The origin of the Universe will be unveiled by the LiteBIRD cryogenic satellite". Grenoble Alpes University. 3 July 2023. Retrieved 26 December 2023.
  3. ^ a b c d e f g The LiteBIRD Satellite Mission – Sub-Kelvin Instrument. A. Suzuki, P. Ade, Y. Akiba, etal. arXive repository. Submitted: 15 March 2018.
  4. ^ Mission design of LiteBIRD. T. Matsumura, Y Akiba, J. Borrill, etal. arXive repository. Filed: 12 November 2013.
  5. ^
    doi:10.1117/12.2313432
    Event: SPIE Astronomical Telescopes + Instrumentation, 9 August 2018, Austin, Texas, United States.
  6. ^ INVESTIGATION OF THE SOLAR SYSTEM DISK STRUCTURE DURING THE CRUISING PHASE OF THE SOLAR POWER SAIL MISSION. (PDF). T. Iwata, T. Okada, S. Matsuura, K. Tsumura, H. Yano, T. Hirai, A. Matsuoka, R. Nomura, D. Yonetoku, T. Mihara, Y. Kebukawa, M. ito, M. Yoshikawa, J. Matsu-moto, T. Chujo, and O. Mori. 49th Lunar and Planetary Science Conference 2018 (LPI Contrib. No. 2083).
  7. The Asahi Shimbun
    (in Japanese). Retrieved 2017-05-30.
  8. IN2P3
    . Retrieved 29 April 2021.
  9. ^ a b c LiteBird Science Archived 2020-02-12 at the Wayback Machine. JAZA/ISAS. Accessed 6 October 2018.
  10. ^ LiteBIRD: Mission Overview and Focal Plane Layout. T. Matsumura, Y. Akiba, K. Arnold, J. Borrill, R. Chendra, etal. Journal of Low Temperature Physics. August 2016, Volume 184, Issue 3–4, pp 824–831.
  11. doi:10.1117/12.2055794
    Event: SPIE Astronomical Telescopes + Instrumentation, 2 August 2014, Montréal, Quebec, Canada.
  12. ^ LiteBIRD - Team Members Archived 2018-10-07 at the Wayback Machine. JAXA/ISAS. Accessed: 8 October 2018.
  13. ^ a b LiteBIRD instrumentation Archived 2018-10-07 at the Wayback Machine. JAXA/ISAS. Accessed: 6 October 2018.
  14. doi:10.1117/12.2232008
    Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom. 29 July 2016.

External links
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