Figures of Merit for Different Detector (Configurations Utilized in High Resolution Positron Cameras

Eriksson, Lars; Bergström, Mats; Bohm, C.; Holte, S.; Kesselberg, M.; Litton, J.

doi:10.1109/tns.1986.4337140

Cited by 17 publications

(3 citation statements)

References 8 publications

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“…The cross talk defined as the influence of one channel on the adjacent channels, obtained in our detector was approximately 3%, less than the value provided by the manufacturer of approximately 6%. 23) Relative intensity measurements of all the 64 channels of the XP1752 detector have been performed also using the He-Ne laser diffused light at the entrance slit of the spectrometer. Each channel in the vertical column was read independently.…”

Section: Resultsmentioning

confidence: 99%

Multiposition Multipass Thomson Scattering Diagnostic for Tokamak NOVA-UNICAMP

Monteiro¹,

Machida

2005

Jpn. J. Appl. Phys.

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In this article, the use of an 8×8-matrix independent 10-stage dynode multichannel photomultiplier for multipass Thomson scattering is described. Light from a pulsed ruby laser is irradiated 12 times in the central region of plasma using the resonator cavity of a multipass system, and integrated scattered light is detected for the first time using the multichannel photomultiplier XP1752 from Philips. The simultaneous measurements of electron temperature and density at four spatial positions, which can be extended by increasing the numbers of Analog-to-Digital Converter (ADC) channels and signal output windows, have been performed throughout full discharge by a shot-to-shot procedure. An electron temperature T e of 50 eV and a density n e of 5×1012 cm-3 were measured for the tokamak NOVA-UNICAMP. Because of the use of a low-power ruby laser (typically 1 J) and scattered light amplification using a multipass system, the level of stray light was kept low and absolute density measurements were made possible by nitrogen Rayleigh scattering.

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Section: Resultsmentioning

confidence: 99%

Multiposition Multipass Thomson Scattering Diagnostic for Tokamak NOVA-UNICAMP

Monteiro¹,

Machida

2005

Jpn. J. Appl. Phys.

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“…A technique suitable to identify signals from small crystals in PET is a modified form of the Anger technique (Anger, 1963;Burnham et al, 1985), called the blockdetector method (Murayama et al, 1982;Casey & Nutt, 1986;Eriksson et al, 1986;Dahlbom & Hoffman, 1988;Holte et al, 1988). Figure 6(a) shows an example of a detector block with four scintillators directly mounted on two PMT.…”

Section: Block-detector Conceptmentioning

confidence: 99%

Positron emission tomography—a new technique for studies of the central nervous system

Eriksson

Dahlbom

Widén

1990

Journal of Microscopy

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KEY WORDS. Positron emission tomography, positron camera, central nervous system, brain imaging, brain studies. S U M M A R YPositron emission tomography (PET) has become an important tool to study the central nervous system. Examples of such studies are cerebral blood flow and metabolism and determination of receptor characteristics of the brain. In the following the basic principles and the physics behind PET are given. Different aspects are discussed such as detector design, image reconstructions and data analyses. Since quantification is essential in PET, data have to be corrected for absorption, scatter and random coincidences. These corrections and their influence on image data are discussed.A review of state-of-the-art PET research of the brain is given.

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“…(see, e.g., Refs. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]). Indeed, this material has a high density (6.71 g/cm 3 ), high effective atomic number (Z¼59), fast decay time (20-60 ns), large light yield (in some samples, up to 11,500 photons/MeV [11] or 12,500 photons/ MeV [19]) which is about 20-25% of that of NaI:Tl [1,5,20,21] and considerably larger compared to Bi 4 Ge 3 O 12 (BGO) (8000-9000 photons/MeV (see, e.g., Refs.…”

Section: Introductionmentioning

confidence: 99%