کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8168346 1526293 2016 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Demonstration of polarization sensitivity of emulsion-based pair conversion telescope for cosmic gamma-ray polarimetry
ترجمه فارسی عنوان
تظاهرات حساسیت قطبی شدن تلسکوپ تبدیل جفت بر اساس امولسیون برای پالرماریک گامای کیهانی
کلمات کلیدی
اشعه گاما، قطبش سنجی، امولسیون آزمایش بالون،
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم ابزار دقیق
چکیده انگلیسی
Linear polarization of high-energy gamma-rays (10MeV-100 GeV) can be detected by measuring the azimuthal angle of electron-positron pairs and observing the modulation of the azimuthal distribution. To demonstrate the gamma-ray polarization sensitivity of emulsion, we conducted a test using a polarized gamma-ray beam (0.8-2.4 GeV) at SPring-8/LEPS. Emulsion tracks were reconstructed using scanning data, and gamma-ray events were selected automatically. Using an optical microscope, out of the 2381 gamma-ray conversions that were observed, 1372 remained after event selection, on the azimuthal angle distribution of which we measured the modulation. From the distribution of the azimuthal angles of the selected events, a modulation factor of 0.21+0.11−0.09 was measured, from which the detection of a non-zero modulation was established with a significance of 3.06σ. This attractive polarimeter will be applied to the GRAINE project, a balloon-borne experiment that observes 10-100 GeV cosmic gamma-rays with an emulsion-based pair conversion telescope.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment - Volume 833, 11 October 2016, Pages 165-168
نویسندگان
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