Two-dimensional readout in a liquid xenon ionisation chamber

Solovov, V.; Chepel, V.; Pereira, A.; Lopes, I.; Ferreira‐Marques, R.; Policarpo, A.

doi:10.1016/s0168-9002(01)01889-7

Cited by 13 publications

(4 citation statements)

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“…For measurement of the Y-coordinate, at first, the ratio of the amplitudes of the two PMTs was used but the position resolution was only ∼10 mm (1σ). To improve this resolution by about a factor of ten, the use of a mini-strip plate ( Figure 80) was considered (227), and several tests for this electrode system were conducted. However, to our knowledge this position resolution has not yet been achieved for 511 keV gamma rays, although a multi-strip ionization chamber was tested with 122 keV gamma rays, obtaining a position resolution of < 2 mm (1σ) (225; 226).…”

Section: Lxe Compton Petmentioning

confidence: 99%

Liquid xenon detectors for particle physics and astrophysics

2010

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This article reviews the progress made over the last 20 years in the development and applications of liquid xenon detectors in particle physics, astrophysics and medical imaging experiments. We begin with a summary of the fundamental properties of liquid xenon as radiation detection medium, in light of the most current theoretical and experimental information. After a brief introduction of the different type of liquid xenon detectors, we continue with a review of past, current and future experiments using liquid xenon to search for rare processes and to image radiation in space and in medicine. We will introduce each application with a brief survey of the underlying scientific motivation and experimental requirements, before reviewing the basic characteristics and expected performance of each experiment. Within this decade it appears likely that large volume liquid xenon detectors operated in different modes will contribute to answering some of the most fundamental questions in particle physics, astrophysics and cosmology, fulfilling the most demanding detection challenges. From experiments like MEG, currently the largest liquid xenon scintillation detector in operation, dedicated to the rare "µ → eγ" decay, to the future XMASS which also exploits only liquid xenon scintillation to address an ambitious program of rare event searches, to the class of time projection chambers like XENON and EXO which exploit both scintillation and ionization of liquid xenon for dark matter and neutrinoless double beta decay, respectively, we anticipate unrivaled performance and important contributions to physics in the next few years.PACS numbers: 95.35.+d, 29.40.Mc,95.55.Vj

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Section: Lxe Compton Petmentioning

confidence: 99%

Liquid xenon detectors for particle physics and astrophysics

2010

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“…This concept avoids the disadvantages inherent to any scintillator-based device. The chamber has a bidimensional charge readout, 50 Â 50 mm 2 , consisting of a mini-strip plate made of a glass slab with metal strips deposited along two perpendicular directions (Solovov et al, 2002a). First, results already showed the feasibility of the concept and the possibility of obtaining a position resolution better than 2 mm for 122 keV gamma-rays (Solovov et al, 2002b).…”

Section: Article In Pressmentioning

confidence: 99%

Detectors for medical radioisotope imaging: demands and perspectives

Lopes

Chepel

2004

Radiation Physics and Chemistry

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Radioisotope imaging is used to obtain information on biochemical processes in living organisms, being a tool of increasing importance for medical diagnosis. The improvement and expansion of these techniques depend on the progress attained in several areas, such as radionuclide production, radiopharmaceuticals, radiation detectors and image reconstruction algorithms. This review paper will be concerned only with the detector technology.We will review in general terms the present status of medical radioisotope imaging instrumentation with the emphasis put on the developments of high-resolution gamma cameras and PET detector systems for scinti-mammography and animal imaging. The present trend to combine two or more modalities in a single machine in order to obtain complementary information will also be considered. r

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“…Hence, we developed what we call mini-strip plate, which besides providing good position resolution fulfils the specific requirements imposed by high purity environment and introduces a minimal dead space [19]. Sent_to_Japan.doc submitted to World Scientific : 28-11-02 : 11:58…”

Section: Current Improvements: the Mini-strip Platementioning

confidence: 99%