Relevant bibliographies by topics / Bubble detectors

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Bubble detectors'

Author: Grafiati
Published: 4 June 2021
Last updated: 2 February 2022

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Journal articles on the topic "Bubble detectors"

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Das, Basanta, Anurag Shyam, Rashmita Das, and Durga Rao. "The neutron production rate measurement of an indigenously developed compact D-D neutron generator." Nuclear Technology and Radiation Protection 28, no. 4 (2013): 422–26. http://dx.doi.org/10.2298/ntrp1304422d.

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One electrostatic accelerator based compact neutron generator was developed. The deuterium ions generated by the ion source were accelerated by one accelerating gap after the extraction from the ion source and bombarded to a target. Two different types of targets, the drive - in titanium target and the deuteriated titanium target were used. The neutron generator was operated at the ion source discharge potential at +Ve 1 kV that generates the deuterium ion current of 200 mA at the target while accelerated through a negative potential of 80 kV in the vacuum at 1.3?10-2 Pa filled with deuterium gas. A comparative study for the neutron yield with both the targets was carried out. The neutron flux measurement was done by the bubble detectors purchased from Bubble Technology Industries. The number of bubbles formed in the detector is the direct measurement of the total energy deposited in the detector. By counting the number of bubbles the total dose was estimated. With the help of the ICRP-74 neutron flux to dose equivalent rate conversion factors and the solid angle covered by the detector, the total neutron flux was calculated. In this presentation the operation of the generator, neutron detection by bubble detector and estimation of neutron flux has been discussed.
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Ing, H., R. A. Noulty, and T. D. McLean. "Bubble detectors—A maturing technology." Radiation Measurements 27, no. 1 (February 1997): 1–11. http://dx.doi.org/10.1016/s1350-4487(96)00156-4.

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Smirnova, N., N. Semaschko, and Y. Martinuk. "Bubble Detectors in Fusion Dosimetry." Radiation Protection Dosimetry 44, no. 1-4 (November 1, 1992): 347–49. http://dx.doi.org/10.1093/rpd/44.1-4.347.

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Smirnova, N., N. Semaschko, and Y. Martinuk. "Bubble Detectors in Fusion Dosimetry." Radiation Protection Dosimetry 44, no. 1-4 (November 1, 1992): 347–49. http://dx.doi.org/10.1093/oxfordjournals.rpd.a081464.

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Pollock, Robert W. "Current developments with bubble detectors." International Journal of Radiation Applications and Instrumentation. Part D. Nuclear Tracks and Radiation Measurements 15, no. 1-4 (January 1988): 483–85. http://dx.doi.org/10.1016/1359-0189(88)90185-9.

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Takada, M. "Measured proton sensitivities of bubble detectors." Radiation Protection Dosimetry 111, no. 2 (July 20, 2004): 181–89. http://dx.doi.org/10.1093/rpd/nch330.

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Ing, H., and A. Mortimer. "Space radiation dosimetry using bubble detectors." Advances in Space Research 14, no. 10 (October 1994): 73–76. http://dx.doi.org/10.1016/0273-1177(94)90453-7.

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Schulze, J., W. Rosenstock, and H. L. Kronholz. "Measurements of Fast Neutrons by Bubble Detectors." Radiation Protection Dosimetry 44, no. 1-4 (November 1, 1992): 351–54. http://dx.doi.org/10.1093/rpd/44.1-4.351.

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Azuelos, G., M. Barnabé-Heider, E. Behnke, K. Clark, M. Di Marco, P. Doane, W. Feighery, et al. "Simulation of special bubble detectors for PICASSO." Radiation Protection Dosimetry 120, no. 1-4 (July 4, 2006): 499–502. http://dx.doi.org/10.1093/rpd/nci666.

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Schulze, J., W. Rosenstock, and H. L. Kronholz. "Measurements of Fast Neutrons by Bubble Detectors." Radiation Protection Dosimetry 44, no. 1-4 (November 1, 1992): 351–54. http://dx.doi.org/10.1093/oxfordjournals.rpd.a081465.

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Dissertations / Theses on the topic "Bubble detectors"

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Nascimento, Débora Siqueira. "Detecção de nêutrons rápidos devido a radiação espalhada em aceleradores lineares." Pós-Graduação em Física, 2018. http://ri.ufs.br/jspui/handle/riufs/8963.

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Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq
Linear accelerators of high energy beams have been used to treat tumors in radiotherapy. Some questions about the protection of the patient and occupationally exposed workers have been arisen because high energy bundles generate scattered radiations that are undesirable in treatment. A possible radiation type generated due to the interaction of the beam with accelerator elements is the neutron, mainly fast neutrons. Such radiation can cause serious problems for patients besides cause damage to devices used by them. This work aims investigate the presence of fast neutrons around a mobile accelerator dedicated to intraoperative radiotherapy (IORT) using high energy electron beams. The aim is to detect the possible fast neutrons and further evaluate their distribution within phantom irradiated. For this study a mobile accelerator (LIAC), for electron beams, and a conventional accelerator (Elekta), for the photon beam, were used. Neutron measurements were made using bubble detectors (C-318) which are sensitive only to fast neutrons. In order to simulate the patient two polymethylmethacrylate (PMMA) phantoms, with a volume of 62 x 29 x 24 cm3 and 80 x 30 x 20 cm3, were used. Three detectors were positioned around the LIAC accelerator to measure the fast neutrons radiation generated by the accelerator elements. The measurements inside the phantom were made with three detectors positioned at three different depths, 5, 10 and 15 cm; 1, 5 and 10 cm. Moreover, two distances with respect to the central axis were chosen to the phantons irradiated by LIAC and Elekta: 0 and 4 cm; 0 and 30 cm, respectively. The results from the measurements around the LIAC demonstrate the abscense of fast neutrons. The results for both, LIAC and Elekta, showed that the dose of fast neutrons is mainly concentrated in the central axis and a decrease of 60% and 99%, respectively, in relation to off-axis doses. The highest values found for the different energies of 12, 10 and 8 MeV were 2.44, 1.14 and 0.59 uSv / Gy, respectively, for the LIAC. While the highest values for energies of 15, 10 and 6 MeV for Elekta were 2.98, 1.08 and 0.15 mSv/Gy, respectively. These results also showed the increasing ratio of dose to energy, both for Elekta and for LIAC. The relation between dose and depth also was discussed. It was found that in some cases the neutron attenuation increases with depth as expected while in others the ratio is not clear. The comparison between the doses established in each accelerator showed a difference around 10−3. The data presented in this work, therefore, demonstrate that the LIAC minimally generates fast neutrons within the phantom, when compared with the Elekta, and around were not detected for the LIAC. The neutrons generated by both accelerators presented similar behaviour within the phantom in relation to the energy variation, depth and central axis distance.
Aceleradores lineares de feixes de alta energia são utilizados para tratamento de tumores em radioterapia. Isso tem gerado algumas questões sobre a proteção do paciente e dos trabalhadores ocupasionalmente expostos, pois feixes de alta energia geram radiações espalhadas que são indesejáveis no tratamento. Uma das possíveis radiações geradas devido à interação do feixe com elementos do acelerador é o nêutron, principalmente nêutrons rápidos. Essa radiação pode causar sérios problemas para pacientes caso interajam com o mesmo e ainda podem causar danos a dispositivos utilizados pelo paciente. A proposta desse estudo foi investigar a presença de nêutrons rápidos ao redor de um acelerador móvel dedicado, LIAC, para radioterapia intraoperatória (RT-IO) que utiliza feixes de elétrons de alta energia. Busca-se detectar os possíveis nêutrons rápidos e ainda avaliar a sua distribuição dentro de objeto simulador irradiado. Para este estudo foram utilizados tanto um acelerador móvel (LIAC), para feixes de elétrons, quanto um acelerador convencional (Elekta), para feixe de fótons. As medidas dos nêutrons foram feitas utilizando detectores de bolhas (C-318) que são sensíveis apenas a nêutrons rápidos. Para simular o paciente foram utilizados dois phantons de polimetilmetacrilato (PMMA) com volume de 62 x 29 x 24 cm3 e 80 x 30 x 20 cm3. Em cada posição escolhida, três detectores foram posicionados ao redor do acelerador LIAC para medir a radiação de nêutrons rápidos que eram gerados pelos elementos constituintes do acelerador. As medidas dentro do phantom foram feitas com três detectores posicionados em três profundidades diferentes, 5, 10 e 15 cm; 1, 5 e 10 cm e duas distâncias em relação ao eixo central, 0 e 4 cm; 0 e 30 cm para os phantons irradiados pelo LIAC e Elekta, respectivamente. Os resultados das medidas ao redor do LIAC demonstraram a ausência de nêutrons rápidos. Os resultados tanto para o LIAC quanto para o Elekta mostraram que a dose de nêutrons rápidos é principalmente concentrada no eixo central do feixe e uma queda de 60%, a 4 cm do eixo, e 99%, a 30 cm do eixo, respectivamente. Os maiores valores encontrados para as diferentes energias de 12, 10 e 8 MeV foram 2,44, 1,14 e 0,59 uSvGy para o LIAC, respectivamente. Enquanto que os maiores valores para energias de 15, 10 e 6 MeV para o Elekta foi de 2,98, 1,08 e 0,15 mSVGy, respectivamente. Esses resultados ainda mostraram a relação crescente da dose com a energia, tanto para Elekta quando para LIAC. Outra relação que foi discutida é da dose com a profundidade, porque em alguns casos é nítida a atenuação de nêutrons com o aumento da profundidade e em outros não se demonstra tão regular. A comparação entre as doses estabelecidas em cada acelerador mostrou uma diferença em torno de 10−3. Os dados apresentados nesse trabalho, portanto, demonstram que o LIAC gera minimamente nêutrons rápidos dentro do phantom, se comparado com o Elekta, e ao redor do LIAC não foram detectados. O nêutrons gerados por ambos aceleradores apresentaram comportamento parecido dentro do phantom em relação a variação de energia, profundidade e distância do eixo central.
São Cristóvão, SE
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Delatore, Fabio. "Desenvolvimento de um sistema opto-eletronico para a aplicação da tecnologia fieldbus na detecção de bolhas em tubulações." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267134.

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Orientadores: Ana Maria Frattini Fileti, João Alexandre F. R. Pereira
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica
Made available in DSpace on 2018-08-04T07:22:16Z (GMT). No. of bitstreams: 1 Delatore_Fabio_M.pdf: 5286633 bytes, checksum: fbfd34a4b52a79d151598a14f43c669f (MD5) Previous issue date: 2005
Resumo: O presente trabalho descreve o desenvolvimento de um sistema óptico de detecção de bolhas em tubulações. Esta montagem foi realizado no Laboratório de Controle e Automação de processos de DESQ/FEQ/UNICAMP. As bolhas podem representar um problema em certos processos químicos, por exemplo, no caso de uma tubulação que alimenta uma bomba. Deseja-se exista somente líquido passando, pois bolhas geraria cavitação e também desgaste do rotor devido ao choque dessas bolhas de ar com o rotor e com as paredes internas da bomba, inutilizando-a em pouco tempo de uso. Um outro exemplo, em tubulações com líquidos quentes que alimentam um trocador de calor, a presença de bolhas faz com que a eficiência da troca térmica do equipamento diminua. O sistema óptico desenvolvido utilizou como emissor de luz, o laser e como receptor, um componente eletrônico chamado de fototransistor. Dois tipos de sensores ópticos foram desenvolvidos. O primeiro deles, o sensor pontual, utiliza apenas um emissor laser e um fototransistor. Já o segundo, chamado de sensor multiponto, utiliza quatro emissores laser e quatro fototransistores. Duas interfaces eletrônicas foram desenvolvidas. A interface do sensor pontual funciona com retenção do sinal de saída, ou seja, a saída não se altera até a passagem de uma nova bolha... Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digital
Abstract: This work describes the development of an optical system to detect bubbles on chemical industries pipelines. The experimental apparatus was assembled in the Processes Control and Automation Laboratory of DESQ/FEQ/UNICAMP. Bubbles may represent a problem in some processes. For example, the presence of bubbles in the liquid that feeds a centrifugal pump can cause a decrease in the pump efficiency and the rotor wearing down due to the friction forces. Another example can be found in pipes with hot fluid that feeds a heat exchanger. Bubble appearance will also decrease the heat transfer efficiency. The developed optical system employs the laser pointer pen as a light source (emitter) and an electronic component, called phototransistor, as a receiver. Two optical sensors were developed. The first one was assembled using just one emitter and one-receiver devices. The second one, called multipoint sensor, was developed using four emitters and four receivers. An electronic interface was successfully developed to connect the optical sensor on the Fieldbus network. For the one-emitter-sensor, the interface uses the latch feature so that the transmitter state does no change until a new event happens. On the multipoint sensor, the interface works as an asynchronous counter: for every bubble event, the counter in the software is increased by one... Note: The complete abstract is available with the full electronic digital thesis or dissertations
Mestrado
Sistemas de Processos Quimicos e Informatica
Mestre em Engenharia Química
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U, Siu Cheong, and 余兆祥. "Bubble detector." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/26996865436325955359.

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碩士
國立清華大學
原子科學系
85
Abstract Neutron can be detected on the basis of suspension the superheated drops in polymer or gel mixture. The mechanism of radiation induced bubble nucleation has been studied. A technique of generating uniform sized superheated drops suspended in a viscous liquid has been commercially developed. Autoreader has been designed and tested to detect bubbles in the polymer. Because the bubble detector is a of detecting device, it has many characteristics which can be further studied. This experimental work not only calibrates bubble detector and studies it''s characteristics, but also makes in situ measurement in the THOR (Tsing Hua Open-pool Reactor) facility and monitor the in-flight neutron dose in aircraft. In an 21.5 hours measurement period, one can get a detection limit equivalent to a neutron dose rate of 12nSv(hr-1. Moreover, bubble detector is insensitive to gamma rayvisually readable, and has a dose equivalent response function close to the ICRP curve.
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Liu-Feng-Yen and 劉峰彥. "Feasibility study of fast screening the effective dose from IMRT via bubble detector." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/63729737612205568283.

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碩士
中台醫護技術學院
放射科學研究所
93
The fast screening of in-situ high energy gamma–ray effective dose, E, under the IMRT exposure was evaluated via bubble technology in this study. The bubble counter was offered by the BTI technology, Canada. The bubble detectors were used coupled with an acrylic phantom to evaluate the effective dose E on the basis of ICRP-60 report. Accordingly, thirteen organs were used to determine the equivalent dose HE of high energy x-ray, respectively. However, in inspecting precisely the nucleation energy of implanted seeds of the bubble, too low the nucleation energy of bubble seeds always causes too high the bubble counts and, eventually, overestimates the dosages in reality. Thus, the phantom and bubble detectors as applied in this proposal had to be cooled to a certain temperature to maintain the stability of bubble performance. The bubble detector was maintained at 16℃ to optimize the counting process and the evaluated effective dose. The exposure plan was assigned as chest and abdomen .The dose range was set form 3、5、7MU. for the chest plan. The effective dose for males were 3155.34±57.12、7093.14±29.16 and 8899.31±589.97μSv. The effective dose for females were 2876.25±52.25、5440.04±224.07 and 8690.23±582.02μSv. for the abdomen plan. The effective dose for males were 2475.76±73.81、4111.27±264.41 and 6252.12±253.27μSv. The effective dose for females were 2303.13±69.02、3652.14±259.46 and 4655.59±192.31μSv. In addition, the mechanism of bubble vaporized only when the deposited energy exceeded the threshold level, despite the nature of radiation. Care had to be taken in the variations among radiation fields. Some critical discussion regarding the application bubble detector was also included for the benefit of other researchers
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Lafrenière, Matthieu. "Mesures d'étalonnage aux neutrons et caractérisation par étude Monte Carlo de la réponse des détecteurs à gouttelettes surchauffées conçus pour la recherche et la détection directe du neutralino (la matière sombre) menant aux résultats finaux de l'expérience PICASSO." Thèse, 2016. http://hdl.handle.net/1866/20603.

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Books on the topic "Bubble detectors"

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Canada, Atomic Energy of. Preliminary Measurements of Radiation From A Critical Assembly Using the Bubble Detector. S.l: s.n, 1986.

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L, Rasky P. H., Greve D. W, and Langley Research Center, eds. Advanced detectors and signal processing for bubble memories. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1985.

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Perks, C. A. Neutron Dosimetry Studies Using the New Chalk River Nuclear Laboratories Bubble Damage Detector. AEA Technology Plc, 1987.

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Book chapters on the topic "Bubble detectors"

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Strokina, Nataliya, Roman Juránek, Tuomas Eerola, Lasse Lensu, Pavel Zemčik, and Heikki Kälviäinen. "Comparison of Appearance-Based and Geometry-Based Bubble Detectors." In Computer Vision and Graphics, 610–17. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-11331-9_73.

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Kolanoski, Hermann, and Norbert Wermes. "Non-electronic detectors." In Particle Detectors, 157–70. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198858362.003.0006.

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This chapter presents the non-electronic detector types cloud chamber, bubble chamber and photoemulsions with which the trajectories of ionizing particles can be made visible. Of these ‘classical’ detectors cloud and bubble chambers have today no or at most only minor relevance in research because of their relatively cumbersome data acquisition. However, photoemulsions–despite their laborious data analysis–are still employed in modern experiments when it comes to achieving position resolutions in the micrometer regime. Therefore deployment and analysis of photoemulsions are described in some more detail. Cloud chambers are today only used for demonstration purposes to make radioactivity and cosmic radiation visible. Bubble chamber pictures are frequently drawn on to display reaction chains and event topologies.
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"Superheated Droplet (Bubble) Detectors." In Principles of Radiation Interaction in Matter and Detection, 533–52. WORLD SCIENTIFIC, 2004. http://dx.doi.org/10.1142/9789812703606_0008.

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"Superheated Droplet (Bubble) Detectors and CDM Search." In Principles of Radiation Interaction in Matter and Detection, 1023–63. WORLD SCIENTIFIC, 2015. http://dx.doi.org/10.1142/9789814603195_0014.

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"Superheated Droplet (Bubble) Detectors and CDM Search." In Principles of Radiation Interaction in Matter and Detection, 785–825. WORLD SCIENTIFIC, 2011. http://dx.doi.org/10.1142/9789814360524_0010.

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"Superheated Droplet (Bubble) Detectors and CDM Search." In Principles of Radiation Interaction in Matter and Detection, 721–54. WORLD SCIENTIFIC, 2009. http://dx.doi.org/10.1142/9789812818294_0010.

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Magee, Patrick, and Mark Tooley. "Intravenous Pumps and Syringe Drivers." In The Physics, Clinical Measurement and Equipment of Anaesthetic Practice for the FRCA. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199595150.003.0031.

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Many infusions are given by gravity assisted, drip sets that give a flowrate dependent on the height of the reservoir above the patient, the length of the tubing, the bore of the IV cannula, the density and viscosity of the fluid being delivered, and the patient’s venous pressure. However there is an increasing tendency to use programmable volumetric intravenous pumps and syringe drivers to deliver intravenous anaesthesia, fluids, patient controlled analgesia, epidural infusions and other drugs. Not only are they programmable, but they can also be adjusted to give desired flowrates or volumes. Some infusion devices are powered only by gravity, but the flowrate is controlled by a photoelectric drip rate detector in conjunction with a microprocessor controlled drip occlusion device. Other infusion devices use a stepper motor to control the rate of infusion. A stepper motor is designed so that the rotation is by a fixed amount per supplied electrical pulse, independent of the mechanical load it is carrying. The pulses are controlled by a microprocessor in the pump and the rate of infusion is dependent on the stepper motor’s output. Syringe drivers are designed to use a range of syringe sizes and some require special delivery tubing. The flow is a continuous, pulsatile flow and accuracy is 2–5%. Some syringe drivers are driven by clockwork motors, others by a battery powered motor that is intermittently on and off, depending on required flowrate. The driving mechanism is usually by a screw threaded rod connected to the syringe plunger. Other syringe drivers use a stepper motor connected to the screw threaded rod. Care should be taken not to position the syringe driver above the patient’s venous cannula or the syringe may siphon a drug additional to that programmed on the driver, by virtue of the weight of the column of fluid in the tubing above the patient. Care should also be taken to avoid any bubbles in the syringe reaching the patient. Modern syringe drivers are usually sufficiently accurate over the desired range of infusion [Stokes et al. 1990]. However, there may be a delay before the drug is delivered to the patient as the parts attached to the syringe take up slack [O’Kelly et al. 1992].
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Conference papers on the topic "Bubble detectors"

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Castillo, F., B. Leal, H. Martìnez, J. Rangel, and P. G. Reyes. "Measurements of fast neutrons by bubble detectors." In RADIATION PHYSICS: IX International Symposium on Radiation Physics. AIP, 2013. http://dx.doi.org/10.1063/1.4813457.

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Spurny, Frantisek. "Individual neutron dosimetry with bubble (superheated) detectors." In Fifth International Conference on Applications of Nuclear Techniques: Neutrons in Research and Industry, edited by George Vourvopoulos. SPIE, 1997. http://dx.doi.org/10.1117/12.267869.

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BARNABÉ-HEIDER, M., M. DI MARCO, P. DOANE, M.-H. GENEST, R. GORNEA, C. LEROY, L. LESSARD, et al. "CHARACTERIZATION OF THE RESPONSE OF SUPERHEATED DROPLET (BUBBLE) DETECTORS." In Proceedings of the 8th Conference. WORLD SCIENTIFIC, 2004. http://dx.doi.org/10.1142/9789812702708_0085.

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da Costa and Machado. "Basic Considerations Of Ultrasonic Air-bubble Detectors For Blood Extracorporeal Circulation." In Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 1992. http://dx.doi.org/10.1109/iembs.1992.595605.

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da Costa, Luiz Eduardo G., and Joao C. Machado. "Basic considerations of ultrasonic air-bubble detectors for blood extracorporeal circulation." In 1992 14th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 1992. http://dx.doi.org/10.1109/iembs.1992.5761021.

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Bou-Cabo, M., I. Felis, M. Ardid, and COUPP Collaboration. "Acoustic studies for alpha background rejection in dark matter bubble chamber detectors." In LOW RADIOACTIVITY TECHNIQUES 2013 (LRT 2013): Proceedings of the IV International Workshop in Low Radioactivity Techniques. AIP, 2013. http://dx.doi.org/10.1063/1.4818095.

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Moghaddam, Saeed, and Kenneth T. Kiger. "Pool Boiling Mechanism of HFE-7100." In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56145.

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To study the pool boiling mechanism of HFE-7100, a micro array of forty-four Resistance Temperature Detectors (RTD’s) covering a 1mm in diameter circular area was microfabricated around a single cylindrical cavity on a thin silicon membrane. Constant heat flux was applied to the surface using a thin film heater microfabricated on the backside of the membrane. Images of the bubbles and the temperature of the heated wall underneath and around the bubble were recorded during the pool boiling process. Using the images of the bubbles, their volume, velocity, and frequency of departure was calculated. The acquired experimental data provided the fundamental parameters required for evaluating several boiling models whose development was based on the bubble diameter, frequency of departure, and velocity. For the conditions of this experiment, it seems that the current data can be best explained by transient heat conduction to the liquid adjacent to the heated wall and subsequent pumping of the superheated liquid by the bubbles. However, more experimental data in different conditions are required before solid conclusions can be reached. Details of the experimental results, models, and comparison between the two are presented in this paper.
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Bigham, Sajjad, and Saeed Moghaddam. "A Microscale Study of the Impact of Bubble Growth Dynamics on Surface Heat Flux in Microchannel Flow Boiling Process." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-53049.

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In this study, the physics of microscale heat transfer events at the wall-fluid interface during the growth of a moving bubble in a microchannel is analyzed. The study is enabled through development of a novel device that utilizes 53 microscale platinum resistance temperature detectors (RTDs) embedded in a composite substrate made of a high thermal conductivity material coated by a thin layer of a low thermal conductivity material. This sensors arrangement enables resolving the thermal field at the bubble-wall interface with unprecedented spatial and temporal resolutions of 40–65 μm and 50 μs, respectively. To prevent random bubble inception, a 300 nm in diameter cavity is fabricated using a focused ion beam (FIB) at the center of a pulsed function microheater. A detailed analysis of the surface heat transfer events and their relations to time scale of formation and dimensions of bubbles are conducted to decipher the underlying physics of the flow boiling process. Experimental results show that four mechanisms of heat transfer are active as a bubble grows and flows through the channel. These mechanisms of heat transfer are 1) microlayer evaporation, 2) interline evaporation, 3) transient conduction, and 4) micro-convection. The results suggest that the average surface heat flux enhances as the bubble grows in size resulting in expansion of the surface area over which the thin film evaporation mechanism is active. Above a certain bubble size, the average surface heat flux declines due to the formation of a dry region at the bubble-wall interface. Hence, the results indicate that there is an optimal bubble length at which the average surface heat flux is maximum.
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9

Felis, Ivan, Miguel Ardid, Manuel Bou, and Juan Antonio Martínez. "R&D studies for the development of acoustic sensors for dark matter bubble chamber detectors." In 2nd International Electronic Conference on Sensors and Applications. Basel, Switzerland: MDPI, 2015. http://dx.doi.org/10.3390/ecsa-2-e013.

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10

Wang, Jing, Brian Archambault, Yiban Xu, and Rusi P. Taleyarkhan. "Numerical Simulation and Experimental Study on Resonant Acoustic Chambers: For Novel, High-Efficiency Nuclear Particle Detectors." In 17th International Conference on Nuclear Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/icone17-75744.

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Abstract:
Acoustic-structural-electromagnetic coupled models have been successfully set up for Resonant Acoustic Chambers (RACs) which have important applications in radiation detection, sonoluminescence and sonofusion; the goal being to simulate transient acoustically driven metastable states and structural responses so that the designs of RACs can be optimized for advanced applications. The simulation predictions have been benchmarked with experimental data in two designs of RACs, Open Chamber System (OCS) and Closed Chamber System (CCS). A framework was developed for benchmarking and validating the predicted resonant frequency and oscillatory pressure mapping profiles with and without scattering centers. Experiments were conducted with and without external neutron-induced cavitation bubble clusters. Comparison of measurements versus experimental data demonstrated the applicability of the modeling-cum-simulation framework. Studies have provided insights into the significant and complex influences of fluid-structure-electromagnetic coupling and on the influence of scattering center inclusions on the system’s acoustic responses. The framework appears reasonable for design of advanced, high-powered RACs; however, significant technical challenges remain for capturing the overall system performance upon evolution and transport of transient bubble clusters.
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Reports on the topic "Bubble detectors"

1

Willis, William J. Novel Electron-Bubble Tracking Detectors. Office of Scientific and Technical Information (OSTI), August 2008. http://dx.doi.org/10.2172/962396.

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2

FISHER, RK. HIGH SPATIAL RESOLUTION IMAGING OF INERTIAL FUSION TARGET PLASMAS USING BUBBLE NEWTRON DETECTORS. Office of Scientific and Technical Information (OSTI), October 2002. http://dx.doi.org/10.2172/814009.

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3

FISHER, RK. HIGH SPATIAL RESOLUTION NEUTRON IMAGING OF INERTIAL FUSION TARGET PLASMAS USING BUBBLE DETECTORS. Office of Scientific and Technical Information (OSTI), July 2003. http://dx.doi.org/10.2172/814025.

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4

Dahl, Carl Eric. Advances in large, liquid-based nuclear recoil detectors — Final Technincal Report for “A Scintillating Xenon Bubble Chamber for Dark Matter Detection”. Office of Scientific and Technical Information (OSTI), August 2020. http://dx.doi.org/10.2172/1644294.

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5

FISHER, RK. HIGH SPATIAL RESOLUTION IMAGING OF INERTIAL FUSION TARGET PLASMAS USING BUBBLE NEUTRON DETECTORS, Final Report for the Period November 1, 1999 - February 28, 2001. Office of Scientific and Technical Information (OSTI), February 2003. http://dx.doi.org/10.2172/814007.

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6

FISHER, RK. HIGH SPATIAL RESOLUTION NEUTRON IMAGING OF INERTIAL FUSION TARGET PLASMAS USING BUBBLE DETECTORS. NLUF Program Progress Summary Report for period November 1, 2002 - July 31, 2003. Office of Scientific and Technical Information (OSTI), August 2003. http://dx.doi.org/10.2172/814032.

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7

Buckner, M. A. Improving neutron dosimetry using bubble detector technology. Office of Scientific and Technical Information (OSTI), February 1993. http://dx.doi.org/10.2172/10152596.

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8

Buckner, M. A. Improving neutron dosimetry using bubble detector technology. Office of Scientific and Technical Information (OSTI), February 1993. http://dx.doi.org/10.2172/6525620.

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9

Ipe, N. E., and D. D. Busick. BD-100: THE CHALK RIVER NUCLEAR LABORATORIES' NEUTRON BUBBLE DETECTOR. Office of Scientific and Technical Information (OSTI), August 1987. http://dx.doi.org/10.2172/1448399.

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10

Collar, J. I., M. Crisler, J. Hall, D. Holmgren, D. Nakazawa, K. O. O'Sullivan, R. Plunkett, et al. COUPP, a Heavy-Liquid Bubble Chamber for WIMP Detection: First Tests in the MINOS Near-Detector Gallery. Office of Scientific and Technical Information (OSTI), July 2004. http://dx.doi.org/10.2172/993555.

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