Strip detector for short-range particles

Rosenfeld, Anatoly B.; Pugatch, V.; Zinets, O. S.; Litovchenko, P.G.; Barabash, L.I.; Pavlenko, Yu.N.; Vasilyev, Yu.O.

doi:10.1109/23.159680

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…The key feature allowing this advancement is a geometry-driven design of the detector, which is therefore referred to as a topological detector. Historically, the idea of exploiting detector geometry for coordinate/position determination has found many applications in particle physics including silicon strip detectors for short range charged particles (Rosenfeld et al 1992), and 2D position-sensitive silicon drift detectors (Hijzen et al 1994), among others.…”

Section: Introductionmentioning

confidence: 99%

Topological detector: measuring continuous dosimetric quantities with few-element detector array

Han¹,

Brivio²,

Sajo³

et al. 2016

Phys. Med. Biol.

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A prototype topological detector was fabricated and investigated for quality assurance of radiation producing medical devices. Unlike a typical array or flat panel detector, a topological detector, while capable of achieving a very high spatial resolution, consists of only a few elements and therefore is much simpler in construction and more cost effective. The key feature allowing this advancement is a geometry-driven design that is customized for a specific dosimetric application. In the current work, a topological detector of two elements was examined for the positioning verification of the radiation collimating devices (jaws, MLCs, and blades etc). The detector was diagonally segmented from a rectangular thin film strip (2.5 cm × 15 cm), giving two contiguous but independent detector elements. The segmented area was the central portion of the strip measuring 5 cm in length. Under irradiation, signals from each detector element were separately digitized using a commercial multichannel data acquisition system. The center and size of an x-ray field, which were uniquely determined by the collimator positions, were shown mathematically to relate to the difference and sum of the two signals. As a proof of concept, experiments were carried out using slit x-ray fields ranging from 2 mm to 20 mm in size. It was demonstrated that, the collimator positions can be accurately measured with sub-millimeter precisions.

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Section: Introductionmentioning

confidence: 99%

Topological detector: measuring continuous dosimetric quantities with few-element detector array

Han¹,

Brivio²,

Sajo³

et al. 2016

Phys. Med. Biol.

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“…It has previously been demonstrated [19] in an n-type 3 kΩ · cm silicon strip detector with 50 µm pitch that the charge sharing effect can be used for determining the position of charge deposition events between adjacent strips with micron resolution using coincidence analysis of the collected charge amplitudes or timing in adjacent strips.…”

Section: Introductionmentioning

confidence: 99%

“…This can be used for determining the events associated with charge deficit in the sensitive volume using a coincidence approach as in [19]. The signal in the GRE is an indication of the incidence of a particle outside the sensitive volume which can be excluded by the data acquisition (DAQ) system.…”

Section: Introductionmentioning

confidence: 99%

Large Area Silicon Microdosimeter for Dosimetry in High LET Space Radiation Fields: Charge Collection Study

Livingstone

Prokopovich

Lerch

et al. 2012

IEEE Trans. Nucl. Sci.

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Abstract-Silicon microdosimeters for the characterisation of mixed radiation fields relevant to the space radiation environment have been under continual development at the Centre for Medical Radiation Physics for over a decade. These devices are useful for the prediction of single event upsets in microelectronics and for radiation protection of spacecraft crew. The latest development in silicon microdosimetry is a family of large-area n-SOI microdosimeters for real-time dosimetry in space radiation environments. The response of n-SOI microdosimeters to 2 MeV H and 5.5 MeV He ions has been studied to investigate their charge collection characteristics. The studies have confirmed 100% yield of functioning cells, but have also revealed a charge sharing effect due to diffusion of charge from events occurring outside the sensitive volume and an enhanced energy response due to the collection of charge created beneath the insulating layer. The use of a veto electrode aims to reduce collection of diffused charge. The effectiveness of the veto electrode has been studied via a coincidence analysis using IBIC. It has been shown that suppression of the shared events allows results in a better defined sensitive volume corresponding to the region under the core electrode with almost 100% charge collection.

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