Performance characteristics of a silicon photomultiplier based compact radiation detector for Homeland Security applications

Park, Hye Min; Joo, Koan Sik

doi:10.1016/j.nima.2015.01.080

Cited by 18 publications

(7 citation statements)

References 7 publications

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“…SiPMs are ideal photo-detectors to be used in applications where low light/radiation levels must be measured and quantified with high precision. Typical applications include high energy physics [3], nuclear medical imaging [4], homeland security [5] and bio-photonics [6].…”

Section: Introductionmentioning

confidence: 99%

Impact of long-pass interferential filters on dark current and background light rejection in Silicon Photomultipliers

et al. 2018

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There is an increasing interest in using Silicon Photomultipliers (SiPMs) in emerging applications where the detectors have to operate in ambient environment with high sensitivity and fast timing response in combination with narrow bandwidth light emitting sources like LEDs or VCSELs. The need to use large area detectors for optimizing the light collection efficiency, due to the low optical fluxes to be usually detected, imposes the optimization of the SiPM performance in specific wavelength ranges (usually visible or near infrared), to fully exploit the single photon sensitivity of these detectors and not to reduce at the same time their dynamic range. The use of proper optical long-pass filters on the detector's package can represent a suitable way to reach both these targets, through the reduction of environmental light absorption. Here we present the preliminary results obtained from the characterization of n+-p SiPMs with commercial long-pass filters with increasing cut-on wavelength in the range 500 nm–900 nm glued on the top side of the detector's package. The performance of the detectors has been evaluated in terms of dark current variation induced by the use of the filters and background light rejection under the illumination of white fluorescent lamps. The relevant reduction observed in the dark current (up to 90% at 13 V overvoltage) and the consistent reduction of stray light absorption (up to 90% at 3 V overvoltage with a 900 nm cut-on wavelength long-pass filter) are the main characterization results obtained and shown in this paper.

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Section: Introductionmentioning

confidence: 99%

Impact of long-pass interferential filters on dark current and background light rejection in Silicon Photomultipliers

et al. 2018

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“…Furthermore, the proposed biasing topology is power efficient compared to the straightforward approach of providing a separate bias voltage to each SiPM separately. For comparison, a n  n SiPM array with the proposed topology will have a power consumption as shown in (3) where a separate bias voltage approach will consume as shown in (4).…”

Section: Resultsmentioning

confidence: 99%

“…ADIATION detectors based on arrays of silicon photomultipliers (SiPMs) coupled to a light scintillator are becoming more and more popular, gradually replacing traditional photomultiplier tube (PMT) based detectors [1]. Among their many uses, SiPM based detectors can be found in medical imaging devices such as positron emission tomography (PET) [2] and single photon emission tomography (SPECT) [3], homeland security applications [4], environmental monitoring with drones [5], and particle astrophysics experiments with radiation detector mounted on a satellite [6,7]. Its compactness, relatively low bias voltage and immunity to electro-magnetic interference (EMI) give the SiPM superiority over the traditional PMT in radiation detector implementations, especially for the two last applications mentioned above.…”

Section: Introductionmentioning

confidence: 99%

Spectral Enhancement of a SiPM Array-Based Radiation Detector

Harn

Osovizky²,

Kadmon³

et al. 2021

EPJ Web Conf.

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Silicon Photomultipliers (SiPMs) have many advantages when used in radiation detectors. Low bias voltage, compactness and immunity to electromagnetic interference are among their prominent benefits. However, due to their small size, usually an array of SiPM components is required in order to cover the coupling surface area of a scintillator. Since the SiPM is a semiconductor, biased in a reversed voltage, gain variation and strong temperature dependence are introduced. As a result, SiPM-based detectors, particularly an array of SiPMs, undergo spectral signal to noise ratio reduction. This work studies the effect of the SiPM breakdown voltage variation on the obtained energy spectrum and proposes an electronic approach to overcome this technological drawback. This developed technology provides an adequate temperature-dependent, commonly distributed high bias voltage and an individual offset-voltage fine tuning that enables adjustment of all the SiPM components to their optimum operating points. Powerwise it is beneficial to operate SiPM at lower voltages, where undesirable gain variation is more dominant. The proposed solution enables working at lower bias voltages, which provides lower power consumption and better radiation hardness, while yielding an enhanced spectrum resolution. The proposed electronic approach enhances the obtained spectra, reducing the noise threshold by 16 % when working at 1 V overvoltage. Hence provides an enhanced signal to noise ratio over the traditional biasing methods.

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“…Furthermore, its decay time (90 ns) is shorter than those of the conventional scintillators (CsI:Tl and NaI:Tl) [ 4 ]. In order to maximize the light output from the Ce:GAGG and to match it to the SiPM photosensitive area, the crystal geometry was optimized using Monte Carlo n-particle extended code [ 5 ]. Figure 1 shows the detector head of the Personal-Spect.…”

Section: Methodsmentioning

confidence: 99%

Development and Performance Characteristics of Personal Gamma Spectrometer for Radiation Monitoring Applications

Park

Joo

2016

Sensors

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In this study, a personal gamma (γ) spectrometer was developed for use in applications in various fields, such as homeland security and environmental radiation monitoring systems. The prototype consisted of a 3 × 3 × 20 mm3 Ce-doped Gd–Al–Ga–garnet (Ce:GAGG) crystal that was coupled to a Si photomultiplier (SiPM) to measure γ radiation. The γ spectrometer could be accessed remotely via a mobile device. At room temperature, the implemented Ce:GAGG-SiPM spectrometer achieved energy resolutions of 13.5%, 6.9%, 5.8%, and 2.3% for 133Ba at 0.356 MeV, 22Na at 0.511 MeV, 137Cs at 0.662 MeV, and 60Co at 1.33 MeV, respectively. It consumed only about 2.7 W of power, had a mass of just 340 g (including the battery), and measured only 5.0 × 7.0 cm2.

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Performance characteristics of a silicon photomultiplier based compact radiation detector for Homeland Security applications

Cited by 18 publications

References 7 publications

Impact of long-pass interferential filters on dark current and background light rejection in Silicon Photomultipliers

Impact of long-pass interferential filters on dark current and background light rejection in Silicon Photomultipliers

Spectral Enhancement of a SiPM Array-Based Radiation Detector

Development and Performance Characteristics of Personal Gamma Spectrometer for Radiation Monitoring Applications

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