Caractérisation et étalonnage de la caméra de l'expérience ballon PILOT (Polarized Instrument for Long wavelength Observation of the Tenuous interstellar medium)

Abstract : The Polarized Instrument for Long wavelength Observation of the Tenuous interstellar medium (PILOT) is a balloon borne experiment designed to measure the polarized emission from dust grains in the galaxy in the submillimeter range. The payload is composed of a telescope at the optical focus of which is placed a camera using 2048 bolometers cooled to 300 mK. The camera performs polarized optical measurements in two spectral bands (240 µm and 550 µm). The polarization measurement is based on a cryogenic rotating half-wave plate and a fixed mesh grid polarizer placed at 45° separating the beam into two orthogonal polarized components each detected by a detector array. The Institut d'Astrophysique Spatiale (Orsay, France) is responsible for the design, integration, tests and spectral calibration of the camera. Two optical benches have been designed for its imaging and polarization characterization and spectral calibration. Theses setups allow to validate the alignment of the camera cryogenic optics, to check the optical quality of the images, to characterize the time and intensity response of the detectors, and to measure the overall spectral response. A numerical photometric model of the instrument was developed for the optical configuration during calibration tests (spectral), functional tests (imager) on the ground, and flight configuration at the telescope focus, giving an estimate of the optical power received by the detectors for each configuration. The tests campaign validates the PILOT camera characterization and calibration. It delivered the first submillimeter images and the first spectral responses. Next, the camera will be aligned and integrated with the primary mirror of the telescope on the CNES gondola, for characterization and optical polarization calibration of the complete instrument. The first flight is now planned for mid 2014.
Document type :
Theses
Complete list of metadatas

Cited literature [37 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-01023005
Contributor : Abes Star <>
Submitted on : Friday, July 11, 2014 - 1:05:20 PM
Last modification on : Tuesday, May 21, 2019 - 8:26:17 PM
Long-term archiving on : Saturday, October 11, 2014 - 12:25:11 PM

File

VD3_BUTTICE_VINCENT_30092013.p...
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01023005, version 1

Collections

Citation

Vincent Buttice. Caractérisation et étalonnage de la caméra de l'expérience ballon PILOT (Polarized Instrument for Long wavelength Observation of the Tenuous interstellar medium). Autre. Université Paris Sud - Paris XI, 2013. Français. ⟨NNT : 2013PA112203⟩. ⟨tel-01023005⟩

Share

Metrics

Record views

1039

Files downloads

157