Pre-flight performance of a micro-satellite TSUBAME for X-ray polarimetry of gamma-ray bursts

Yatsu, Yoichi; Ito, Kei; Kurita, S.; Arimoto, M.; Kawai, N.; Matsushita, Masanori; Kawajiri, Shota; Kitamura, S.; Matunaga, Saburo; Kimura, Shinichi; Kataoka, J.; Nakamori, Takeshi; Kubo, Sin

doi:10.1117/12.2056275

Cited by 7 publications

(5 citation statements)

References 14 publications

(10 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recent studies [30] suggest that change in polarization because of the hard X-ray mirrors is around ∼ 1 % limiting the sensitivity of the polarimeters at the focal plane of such hard X-ray telescopes to ∼ 1 %. There are few other polarimetric mission proposals based on hard X-ray focal plane Compton polarimeters like X-Calibur [2], PolariS [24] and TSUBAME [55]. Among these, our polarimetric configuration closely resembles with the scattering geometry used in X-Calibur [2], which is under active consideration for NASA's next small satellite mission PolSTAR.…”

Section: Cxpol Configurationmentioning

confidence: 99%

Development of a hard x-ray focal plane compton polarimeter: a compact polarimetric configuration with scintillators and Si photomultipliers

et al. 2015

View full text Add to dashboard Cite

X-ray polarization measurement of cosmic sources provides two unique parameters namely degree and angle of polarization which can probe the emission mechanism and geometry at close vicinity of the compact objects. Specifically, the hard X-ray polarimetry is more rewarding because the sources are expected to be intrinsically highly polarized at higher energies. With the successful implementation of Hard X-ray optics in NuSTAR, it is now feasible to conceive Compton polarimeters as focal plane detectors. Such a configuration is likely to provide sensitive polarization measurements in hard X-rays with a broad energy band. We are developing a focal plane hard Xray Compton polarimeter consisting of a plastic scintillator as active scatterer surrounded by a cylindrical array of CsI(Tl) scintillators. The scatterer is 5 mm diameter and 100 mm long plastic scintillator (BC404) viewed by normal PMT. The photons scattered by the plastic scatterer are collected by a cylindrical array of 16 CsI(Tl) scintillators (5 mm×5 mm×150 mm) which are read by Si Photomultiplier (SiPM). Use of the new generation SiPMs ensures the compactness of the instrument which is essential for the design of focal plane detectors. The expected sensitivity of such polarimetric configuration and complete characterization of the plastic scatterer, specially at lower energies have been discussed in [11,13]. In this paper, we characterize the CsI(Tl) absorbers coupled to SiPM. We also present the experimental results from the fully assembled configuration of the Compton polarimeter.

show abstract

Section: Cxpol Configurationmentioning

confidence: 99%

Development of a hard x-ray focal plane compton polarimeter: a compact polarimetric configuration with scintillators and Si photomultipliers

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The measured data are taken from a channel which has a mean ENC as shown in Figure 13. an APD area of 5 × 5 mm 2 ) which is widely used as a scintillation detector [11], with its space use verified in small satellite projects [12,13].…”

Section: Spectramentioning

confidence: 99%

“…In addition, Ce:GAGG does not have any hygroscopic effects which makes handling easier compared with other hygroscopic scintillators such as Tl:CsI or Tl:NaI. Here, we use a Hamamatsu reverse-type APD (S8664-55 with an APD area of 5 × 5 mm 2 ) which is widely used as a scintillation detector [11], with its space use verified in small satellite projects [12,13].…”

Section: Spectramentioning

confidence: 99%

Development of a 32-channel ASIC for an X-ray APD detector onboard the ISS

Arimoto

Harita

Sugita

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

Self Cite

View full text Add to dashboard Cite

We report on the design and performance of a mixed-signal application specific integrated circuit (ASIC) dedicated to avalanche photodiodes (APDs) in order to detect hard X-ray emissions in a wide energy band onboard the International Space Station. To realize wide-band detection from 20 keV to 1 MeV, we use Ce:GAGG scintillators, each coupled to an APD, with low-noise front-end electronics capable of achieving a minimum energy detection threshold of 20 keV. The developed ASIC has the ability to read out 32-channel APD signals using 0.35 µm CMOS technology, and an analog amplifier at the input stage is designed to suppress the capacitive noise primarily arising from the large detector capacitance of the APDs. The ASIC achieves a performance of 2099 e − + 1.5 e − /pF at root mean square (RMS) with a wide 300 fC dynamic range. Coupling a reverse-type APD with a Ce:GAGG scintillator, we obtain an energy resolution of 6.7% (FWHM) at 662 keV and a minimum detectable energy of tolerance for space applications by using a 90 MeV proton beam, confirming that the ASIC is free of single-event effects and can operate properly without serious degradation in analog and digital processing.

show abstract

“…Tsubame is a microsatellite developed at the Tokyo Institute of Technology that was placed into orbit in November, 2014 (Yatsu et al, 2014(Yatsu et al, , 2011Arimoto et al, 2008). The satellite uses a nearly cubic platform measuring 50 cm × 50 cm × 47 cm.…”

Section: Tsubamementioning

confidence: 99%

High energy polarimetry of prompt GRB emission

McConnell

2017

New Astronomy Reviews

View full text Add to dashboard Cite

Evidence of polarized γ-ray emission (> 50 keV) from Gamma-Ray Bursts (GRBs) has been accumulated in recent years. Measurements have been reported with levels in the range of 30-80%, typically with limited statistical significance. No clear picture has yet emerged with regards to the polarization properties of GRBs. Taken at face value, the data suggest that most GRBs have a relatively large level of polarization (typically, > 50%), which may suggest synchrotron emission associated with an ordered magnetic field structure within the GRB jet. But these results are far from conclusive. Here, we review the observations that have been made, concentrating especially on the instrumental issues and the lessons that might be learned from these data.

show abstract

Pre-flight performance of a micro-satellite TSUBAME for X-ray polarimetry of gamma-ray bursts

Cited by 7 publications

References 14 publications

Development of a hard x-ray focal plane compton polarimeter: a compact polarimetric configuration with scintillators and Si photomultipliers

Development of a hard x-ray focal plane compton polarimeter: a compact polarimetric configuration with scintillators and Si photomultipliers

Development of a 32-channel ASIC for an X-ray APD detector onboard the ISS

High energy polarimetry of prompt GRB emission

Contact Info

Product

Resources

About