Study of non-linear energy response of POLAR plastic scintillators to electrons

Zhang, Xiaofeng; Xiao, H.; Yu, B. X.; Orsi, S.; Wu, Bobing; Hu, W.; Zhang, Xuan

doi:10.1016/j.nima.2015.06.031

Cited by 8 publications

(4 citation statements)

References 19 publications

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“…From the amplitude of the 360 • component, it can be inferred that there is either an off-axis or off-center alignment, and from the phase of this component, it can be inferred that in which direction the offset is. From the fitting parameters, the offset/misalignment can be quantified through simulations, as exemplified in [24]. The 360 • component amplitude (p1) is only 3% of the constant term (p0), indicating that these effects are very small.…”

Section: Analysis and Resultsmentioning

confidence: 99%

A Compton polarimeter using scintillators read out with MPPCs through Citiroc ASIC

Kushwah

Iyer

Kiss

et al. 2019

Nuclear Instruments and Methods in Physics Research Section A:

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Section: Analysis and Resultsmentioning

confidence: 99%

A Compton polarimeter using scintillators read out with MPPCs through Citiroc ASIC

Kushwah

Iyer

Kiss

et al. 2019

Nuclear Instruments and Methods in Physics Research Section A:

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“…It should be noted that one correction to the deposited energy is already applied within Geant4. This regards the Birks' effect [33] where a Birks' constant of 0.143 mm/MeV is used, as taken from [34].…”

Section: Geant4mentioning

confidence: 99%

Response of the first POLAR-2 prototype to polarized beams

Kole,

Angelis,

Bacelj

et al. 2024

J. Inst.

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POLAR-2 is a dedicated gamma-ray polarimeter currently foreseen to be launched towards the China Space Station around 2027. The design of the detector is based on the legacy of its predecessor mission POLAR which was launched in 2016. POLAR-2 aims to measure the polarization of the Gamma-ray Burst prompt emission within the 30–800 keV energy range. Thanks to its high sensitivity to gamma-ray polarization, as well as its large effective area, POLAR-2 will provide the most precise measurements of this type to date. Such measurements are key to improve our understanding of the astrophysical processes responsible for Gamma-Ray Bursts. The detector consists of a segmented array of plastic scintillator bars, each one of which is read out by a Silicon PhotoMultiplier channel. The flight model of POLAR-2 will contain a total of 6400 scintillators. These are divided into 100 groups of 64 bars each, in so-called polarimeter modules. In recent years, the collaboration has designed and produced the first prototypes of these polarimeter modules and subjected these to space qualification tests. In addition, in April 2023, the first of these modules were calibrated using fully polarized gamma-ray beams at the European Synchrotron Radiation Facility (ESRF) in France. In this work, we will present the results of this calibration campaign and compare these to the simulated performance of the POLAR-2 modules. Potential improvements to the design are also discussed. Finally, the measurements are used, in combination with the verified simulation framework, to estimate the scientific performance of the full POLAR-2 detector and compare it to its predecessor.

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“…The later data analysis [14] showed that for beam energies of 110 keV, 80 keV and 60 keV, both on-axis and off-axis (for 30 • and 60 • off-axis) measured modulation factor agreed very well with the Monte-Carlo simulation results as for the Monte-Carlo simulation software it added the digitization procedure of the detector with the parameters from the basic performance calibrations. One important parameter which is the Birks's constant came from the measurement result of [15].…”

Section: Calibrationmentioning

confidence: 99%

Overview of the POLAR mission

Sun¹

2019

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)

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Study of non-linear energy response of POLAR plastic scintillators to electrons

Cited by 8 publications

References 19 publications

A Compton polarimeter using scintillators read out with MPPCs through Citiroc ASIC

A Compton polarimeter using scintillators read out with MPPCs through Citiroc ASIC

Response of the first POLAR-2 prototype to polarized beams

Overview of the POLAR mission

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