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

Kushwah, Rakhee; Iyer, Nirmal; Kiss, Mózsi; Stana, Theodor-Adrian; Pearce, Mark

doi:10.1016/j.nima.2019.162376

Cited by 6 publications

(3 citation statements)

References 24 publications

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“…The photopeak position shows a linear dependence on energy, as shown in figure 8. The ASIC does not display significant non-linearity, as reported previously [23]. All three GAGG scintillators showed a similar light output and energy-channel relation.…”

Section: Energy Characterisation Using Radioactive Sourcessupporting

confidence: 82%

The design and performance of CUBES — a CubeSat X-ray detector

2021

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CUBES is a X-ray detector payload which will be installed on the KTH 3U CubeSat mission, MIST. The detector comprises cerium-doped Gd3Al2Ga3O12 (GAGG) scintillators read out with silicon photomultipliers through a Citiroc Application-Specific Integrated Circuit. The detector operates in the energy range ∼35–800 keV. The aim of the CUBES mission is to provide experience in the operation of these relatively new technologies in a high-inclination low earth orbit, thereby providing confidence for component selection in more complex satellite missions. The design of the CUBES detector is described, and results from performance characterisation tests carried out on a prototype of CUBES, called Proto-CUBES, are reported. Proto-CUBES was flown on a stratospheric balloon platform from Timmins, Canada, in August 2019. During the ∼12 hour long flight, the performance of Proto-CUBES was studied in the near-space environment. As well as measuring the X-ray counts spectra at different atmospheric depths, a 511 keV line from positron annihilation was observed.

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Section: Energy Characterisation Using Radioactive Sourcessupporting

confidence: 82%

The design and performance of CUBES — a CubeSat X-ray detector

2021

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“…There are strong arguments in favour of a combination of low atomic number scintillators, acting as scatterer and high atomic number scintillators acting as absorbers. The use of fast inorganic scintillators (as GAGG, [147,148]) and Silicon Photomultipliers, expands the capability of this approach. Two such detectors will cover a 1.5 π field including the direction of telescopes.…”

Section: A Concept For a Next Generation X-ray Polarimetry Mission (Ngxp)mentioning

confidence: 99%

A polarized view of the hot and violent universe

et al. 2021

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X-ray polarimetry has long been considered the ‘holy grail’ of X-ray astronomy. Fortunately, after a silence of more than 40 years, the field is now rejuvenating. In fact, an X-ray polarimeter onboard a Cube-sat nano-satellite has been recently successfully operated. IXPE, the Imaging X-ray Polarimetry Explorer, will be launched in 2021 while eXTP, containing a larger version of IXPE, is expected to be launched in 2027. Although at present it is difficult to predict the discoveries that, given their exploratory nature, IXPE and eXTP will obtain, the path for a follow-up mission can already be envisaged. In this paper we describe the scientific goals of such a follow-up mission, and present a medium-size mission profile that can accomplish this task.

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“…Scintillation-based X-ray imaging technology has found extensive applications in medical diagnostics 1 – 4 , security screening 5 , 6 , astronomical discovery 7 , 8 and industrial inspection 9 , 10 . Unlike commercial thin-film transistors integrated flat-panel X-ray detectors, the emerging flexible and thus conformable X-ray detectors offer the advantage of three-dimensional (3D) imaging of curved or irregular objects 11 .…”

Section: Introductionmentioning

confidence: 99%

Dual heterogeneous interfaces enhance X-ray excited persistent luminescence for low-dose 3D imaging

Lei,

Yi,

Wang

et al. 2024

Nat Commun

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Lanthanide-doped fluoride nanoparticles (NPs) showcase adjustable X-ray-excited persistent luminescence (XEPL), holding significant promise for applications in three-dimensional (3D) imaging through the creation of flexible X-ray detectors. However, a dangerous high X-ray irradiation dose rate and complicated heating procedure are required to generate efficient XEPL for high-resolution 3D imaging, which is attributed to a lack of strategies to significantly enhance the XEPL intensity. Here we report that the XEPL intensity of a series of lanthanide activators (Dy, Pr, Er, Tm, Gd, Tb) is greatly improved by constructing dual heterogeneous interfaces in a double-shell nanostructure. Mechanistic studies indicate that the employed core@shell@shell structure could not only passivate the surface quenchers to lower the non-radiative relaxation possibility, but also reduce the interfacial Frenkel defect formation energy leading to increase the trap concentration. By employing a NPs containing flexible film as the scintillation screen, the inside 3D electrical structure of a watch was clearly achieved based on the delayed XEPL imaging and 3D reconstruction procedure. We foresee that these findings will promote the development of advanced X-ray activated persistent fluoride NPs and offer opportunities for safer and more efficient X-ray imaging techniques in a number of scientific and practical areas.

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

Cited by 6 publications

References 24 publications

The design and performance of CUBES — a CubeSat X-ray detector

The design and performance of CUBES — a CubeSat X-ray detector

A polarized view of the hot and violent universe

Dual heterogeneous interfaces enhance X-ray excited persistent luminescence for low-dose 3D imaging

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