Details

Autor(en) / Beteiligte

• Iwakiri, W.B.
• Black, J.K.
• Cole, R.
• Enoto, T.
• Hayato, A.
• Hill, J.E.
• Jahoda, K.
• Kaaret, P.
• Kitaguchi, T.
• Kubota, M.
• Marlowe, H.
• McCurdy, R.
• Takeuchi, Y.
• Tamagawa, T.

Titel

Performance of the PRAXyS X-ray polarimeter

Ist Teil von

• Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 2016-12, Vol.838, p.89-95

Ort / Verlag

Goddard Space Flight Center: Elsevier B.V

Erscheinungsjahr

2016

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The performance of the Time Projection Chamber (TPC) polarimeter for the Polarimeter for Relativistic Astrophysical X-ray Sources (PRAXyS) Small Explorer was evaluated using polarized and unpolarized X-ray sources. The PRAXyS mission will enable exploration of the universe through X-ray polarimetry in the 2–10keV energy band. We carried out performance tests of the polarimeter at the Brookhaven National Laboratory, National Synchrotron Light Source (BNL-NSLS) and at NASA's Goddard Space Flight Center. The polarimeter was tested with linearly polarized, monochromatic X-rays at 11 different energies between 2.5 and 8.0keV. At maximum sensitivity, the measured modulation factors at 2.7, 4.5 and 8.0keV are 27%, 43% and 59%, respectively and the measured angle of polarization is consistent with the expected value at all energies. Measurements with a broadband, unpolarized X-ray source placed a limit of less than 1% on false polarization in the PRAXyS polarimeter.