Micromegas, a multipurpose gaseous detector

Charpak, G.; Derré, J.; Giomataris, Y.; Rebourgeard, P.

doi:10.1016/s0168-9002(01)01713-2

Cited by 138 publications

(69 citation statements)

References 18 publications

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“…The main advantage of the solid converter concept is a great simplicity of the structure and especially the excellent spatial (<50 µm) and time resolution (~ ns) that is obtained by using small drift gaps. Such performance is not easy to obtain using gaseous converters, for instance 3 He. The draw back is the lower efficiency of the thin solid converter for thermal neutrons, limited by the neutron (n,α) cross section and the thickness of the 6 Li layer, which must be shorter than the alpha particle range.…”

Section: Description Of Micromegas For Neutron Detectionmentioning

confidence: 99%

See 1 more Smart Citation

Fast Neutron Detectors Based on Micromegas Technology

Andriamonje¹,

Giomataris²,

Pancin³

2007

Proceedings of International Workshop on Fast Neutron Detectors and Applications — PoS(FNDA2006)

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After a short description of the Micromegas principle, a new concept of neutron detectors based on this technique is presented. The report is illustrated by an overall picture of the possible use of these detectors in different domain such as: nuclear physics, inertial fusion and industrial application. A particular description will be devoted to the compact detector named "PiccoloMicromegas". This detector, able to measure neutron flux in a broad range of energy of neutron (from thermal to several MeV), is developed for the measurements of neutrons flux in-core of the future generations of the nuclear reactors (fast and possibly Accelerator Driven System (ADS)).

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Section: Description Of Micromegas For Neutron Detectionmentioning

confidence: 99%

“…At present, Micromegas detector is used in many experiments [2,3] and due to its high performances is being employed for searching rare events such as the Solar axion CAST [4].…”

Section: Introductionmentioning

confidence: 99%

Fast Neutron Detectors Based on Micromegas Technology

Andriamonje¹,

Giomataris²,

Pancin³

2007

Proceedings of International Workshop on Fast Neutron Detectors and Applications — PoS(FNDA2006)

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“…For example, in tracking measurements σ~12 µm was achieved with MICROMEGAS [63] and ~40 µm with the GEM [64]. Thus the high granularity of micropattern detectors plays an important role in this application.…”

Section: The Position Resolutionmentioning

confidence: 99%

Micropattern Gaseous Detectors

Francke

Peskov

2004

Innovative Detectors for Supercolliders

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“…Arrays of gas detectors with dedicated readout electronics can provide spatial information (1)(2)(3)(4). One of the better systems, the Beta Imager 2000 (LabLogic Systems Limited), has been reported to achieve 100-to 300-mm resolution.…”

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confidence: 99%

Direct Imaging of Radionuclide-Produced Electrons and Positrons with an Ultrathin Phosphor

et al. 2008

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Current electron detectors are either unable to image in vivo or lack sufficient spatial resolution because of electron scattering in thick detector materials. This study was aimed at developing a sensitive high-resolution system capable of detecting electronemitting isotopes in vivo. Methods: The system uses a lenscoupled charge-coupled-device camera to capture the scintillation light excited by an electron-emitting object near an ultrathin phosphor. The spatial resolution and sensitivity of the system were measured with a 3.7-kBq 90 Y/ 90 Sr b-source and a 70-mm resin bead labeled with 99m Tc. Finally, we imaged the 99m Tcpertechnetate concentration in the mandibular gland of a mouse in vivo. Results: Useful images were obtained with only a few hundred emitted b particles from the 90 Y/ 90 Sr source or conversion electrons from the 99m Tc bead source. The in vivo image showed a clear profile of the mandibular gland and many fine details with exposures of as low as 30 s. All measurements were consistent with a spatial resolution of about 50 mm, corresponding to 2.5 detector pixels with the current camera. Conclusion: Our new electron-imaging system can image electron-emitting isotope distributions at high resolution and sensitivity. The system is useful for in vivo imaging of small animals and small, exposed regions on humans. The ability to image b particles, positrons, and conversion electrons makes the system applicable to most isotopes. Di rect imaging of electron emissions from radionuclides is valuable in biodistribution and microdosimetry studies, but most current electron detectors are unable to image in vivo because of either the physical configuration or insufficient sensitivity. Others have either compromised spatial resolution or limited sensitivity due to their design tradeoffs; thin detector materials lack sensitivity, and thick materials cause sufficient scatter of the electrons to impair resolution.Film-based autoradiography is capable of micrometerscale resolution because of the thin emulsions used, but film is limited by its narrow linear response range and relatively low sensitivity, requiring long exposure times. Digital autoradiography systems improve linearity and sensitivity over film with a variety of thicker detector materials.Arrays of gas detectors with dedicated readout electronics can provide spatial information (1-4). One of the better systems, the Beta Imager 2000 (LabLogic Systems Limited), has been reported to achieve 100-to 300-mm resolution.Double-sided silicon detectors with orthogonal readout electrodes can achieve 115 mm in full width at half maximum (FWHM) (5). Other solid-state detectors used for this application include charge-coupled devices (CCD), complementary metal-oxide semiconductor arrays, and hybrid detector technologies (6-8). Their limited sensitivity usually requires tens of hours per exposure.Scintillators and phosphors can be used in combination with digital light sensors such as CCD and complementary metal-oxide semiconductor cameras. One approach to achiev...

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Micromegas, a multipurpose gaseous detector

Cited by 138 publications

References 18 publications

Fast Neutron Detectors Based on Micromegas Technology

Fast Neutron Detectors Based on Micromegas Technology

Micropattern Gaseous Detectors

Direct Imaging of Radionuclide-Produced Electrons and Positrons with an Ultrathin Phosphor

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