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  • gamma ray synchronized

    gamma ray synchronized. TUFGBRB06: A Prompt GammaRay Abstract Purpose: We present a new system to perform prompt gammaray spectroscopy during proton pencilbeam scanning treatments, which enables in vivo verification ...

  • Data acquisition system for angle synchronized gamma-ray ...

    Data acquisition system for angle synchronized - ray tomography of rapidly rotating objects To cite this article: A Bieberle et al 2007 Meas. Sci. Technol. 18 3384 View the article online for updates and enhancements. Related content Validation of high-resolution gamma-ray computed tomography for quantitative gas holdup measurements in ...

  • Cited by: 22
  • Construction of virtual reality system for radiation ...

    The position and posture where the Compton camera detects the gamma rays are estimated by SfM using the video camera. The timestamp of the detected gamma-ray events and the acquisition time of still images extracted from the video are synchronized. Compton cones from each position are projected onto the 3D model of the working environment, and ...

  • Author: Yuki Sato, Kojiro Minemoto, Makoto Nemoto, Tatsuo Torii
  • Data acquisition system for angle synchronized γ-ray ...

    27/09/2007  The angle synchronized tomographic measurement is performed by counting the number of interacting gamma photons at each detector element as a function of the actual angle of rotation. This requires an angle sensor to record the angular position of the rotating object with respect to a zero angle in synchronization with the acquisition of the detector data. Figure

  • Cited by: 22
  • Ultrahigh brilliance quasi-monochromatic MeV γ-rays

    In conclusion, we have demonstrated a self-synchronized all-optical Compton scattering scheme to generate quasi-monochromatic and ultrahigh brilliant MeV γ-rays. With careful design and sophisticated measurements, irrelevant emission including bremsstrahlung and betatron radiations contributed fairly small to the overall γ-ray photons, backed by the exhaustive simulations and the theoretical ...

  • Cited by: 41
  • Gamma ray generator (Patent) DOE Patents

    Ultralow-dose, x-ray or gamma-ray imaging is based on fast, electronic control of the output of a laser-Compton x-ray or gamma-ray source (LCXS or LCGS). X-ray or gamma-ray shadowgraphs are constructed one (or a few) pixel(s) at a time by monitoring the LCXS or LCGS beam energy required at each pixel of the object to achieve a threshold level of detectability at the detector. An example ...

  • Homing Signals - Astrobiology Magazine

    2/10/2002  The first gamma-ray burst was seen in the year 1967 (although it was not reported to the world until 1973) by satellite-borne detectors intended to look for violations of the Nuclear Test Ban Treaty. Credit: BATSE : In addition to big natural events like supernovae, a relatively recent astronomical candidate of much interest is gamma-ray bursts (GRBs). On average, about once per day,

  • Gamma ray generator (Patent) DOE Patents

    Ultralow-dose, x-ray or gamma-ray imaging is based on fast, electronic control of the output of a laser-Compton x-ray or gamma-ray source (LCXS or LCGS). X-ray or gamma-ray shadowgraphs are constructed one (or a few) pixel(s) at a time by monitoring the LCXS or LCGS beam energy required at each pixel of the object to achieve a threshold level of detectability at the detector. An example ...

  • Application of gamma-ray computed tomography for the ...

    Therefore, high-resolution gamma-ray computed tomography (HireCT) has been applied, operated in time-averaging rotation-synchronized CT scanning mode. Detailed studies have been performed on a hydraulic test facility providing authentic operating conditions for industrial centrifugal pumps. The gas phase distribution in the centrifugal pump has been studied for swirling gas–liquid two-phase ...

  • Ultrahigh brilliance quasi-monochromatic MeV γ-rays

    13/07/2016  The spatial distribution p of emergent gamma-rays could be gained through maximum ... Ultrahigh brilliance quasi-monochromatic MeV γ-rays based on self-synchronized

  • The emission of γ-Ray beams with orbital angular

    11/12/2019  Recently, micro-channel plasma (MCP) targets have shown novel effects on light intensification 12, proton acceleration 17, x/gamma-ray generation 18

  • Gamma rays produced by intra-cavity inverse Compton ...

    Gamma rays produced by intra-cavity inverse Compton scattering of a storage ring free-electron laser To cite this article: M E Couprie et al 1999 J. Phys. B: At. Mol. Opt. Phys. 32 5657 View the article online for updates and enhancements. Related content Operation of the Super-ACO Free-Electron Laser in the UV Range At 800 MeV M. E. Couprie, D. Garzella and M. Billardon-High repetition-rate ...

  • Validation of high-resolution gamma-ray computed ...

    averaged rotation-synchronized [14] CT mode were applied and the corresponding measuring accuracies were determined. 2. Materials and methods 2.1. The HireCT tomography system The high-resolution gamma-ray CT system (HireCT) is described in detail elsewhere [27–31]. Thus, only key param-eters are introduced in this chapter. HireCT is operated ...

  • Gamma-Rhythmic Gain Modulation - ScienceDirect

    As visual stimulation induces partly synchronized gamma-band activity across ventral visual areas (Bastos et al., 2015a, Bosman et al., ... but not gamma, is suited to support CTC (Ray and Maunsell, 2015). However, we show that median gain modulation is 20.2% for alpha-beta and 21.6% for gamma. Criticism of the CTC hypothesis has also been based on stimulus-dependent gamma frequencies in

  • Gamma-ray bursts as cool synchrotron sources Nature ...

    21/10/2019  Gamma-ray bursts (GRBs) are the most energetic electromagnetic sources in the Universe, releasing 1042–1047 J (refs. 1,2) in prompt gamma-ray radiation. Fifty years after their discovery, the ...

  • PGIS-2 - NuviaTech Instruments

    Portable Gamma spectrometer Information System is designed for field and mobile gamma spectroscopy surveillance and can be either hand carried or worn as a backpack. The PGIS-2 detection module is equipped with either a 3″x3″ (0.347 L), a 1 L or a 2 L NaI(Tl) detector (with the possibility for other types like BGO and LaBr). The spectrometer is auto-calibrated and real-time stabilized on ...

  • Validation of high-resolution gamma-ray computed ...

    averaged rotation-synchronized [14] CT mode were applied and the corresponding measuring accuracies were determined. 2. Materials and methods 2.1. The HireCT tomography system The high-resolution gamma-ray CT system (HireCT) is described in detail elsewhere [27–31]. Thus, only key param-eters are introduced in this chapter. HireCT is operated ...

  • Mitotic gene conversion events induced in G1

    20/04/2010  PG311 cells synchronized in G1 or G2 were irradiated with 0, 50, or 100 Gy of gamma rays to induce DSBs. The average viabilities for the G1-arrested cells (±95% confidence limits) relative to 100% for unirradiated samples (five independent experiments) were: 100% (±10%) for cells treated with 50 Gy and 77% (±15%) for the samples treated with 100 Gy. The viabilities of the G2-irradiated ...

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  • Ultrahigh brilliance quasi-monochromatic MeV gamma

    Ultrahigh brilliance quasi-monochromatic MeV gamma-rays based on self-synchronized all-optical Compton scattering . By Changhai Yu, Rong Qi, Wentao Wang, Jiansheng Liu, Wentao Li, Cheng Wang, Zhijun Zhang, Jiaqi Liu, Zhiyong Qin, Ming Fang, Ke Feng, Ying Wu, Ye Tian, Yi Xu, Fenxiang Wu, Yuxin Leng, Xiufeng Weng, Jihu Wang, Fuli Wei, Yicheng Yi and Z Song. Abstract. National Natural Science ...

  • SETI Article: Gamma-Ray Bursts as SETI Synchronizers

    The Use of Gamma-Ray Bursts as Time and Direction Markers in SETI Strategies by Robin H. D. Corbet (corbet at lheamail.gsfc.nasa.gov) ... consists of an array of telescopes such as the 1hT then perhaps a smaller sub-array could be devoted to the longer synchronized observations while the major portion of the array made shorter unconstrained observations. The SETI League is undertaking a ...

  • Mitotic gene conversion events induced in G1- synchronized ...

    synchronized yeast cells by gamma rays are similar to spontaneous conversion events Phoebe S. Lee and Thomas D. Petes1 Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC 27710 Contributed by Thomas D. Petes, February 17, 2010 (sent for review January 18, 2010) In a previous study, we mapped spontaneous mitotic reciprocal crossovers (RCOs) in a 120

  • Hydrodynamics analysis in micro-channels of a viscous ...

    Time-averaging rotation-synchronized gamma-ray computed tomography is applied. ... In this work, high-resolution gamma-ray computed tomography (HireCT) was applied for the first time on a viscous coupling to visualize the internal working fluid distribution. The HireCT measurement system comprises a 137 Cs isotopic source and a gamma-ray detector arc operated in single photon counting mode. It ...

  • Data acquisition system for angle synchronized γ-ray ...

    We developed a fast read-out electronics for a gamma ray computed tomography radiation detector for measurements of two-phase flow distributions in rapidly rotating hydrodynamic machines. The electronics operates with a gamma ray detector comprising 320 single scintillation detector elements working in pulse counting mode. Digital pulses corresponding to gamma or x-ray absorption events in the ...

  • Gamma-ray bursts as cool synchrotron sources Nature ...

    21/10/2019  Gamma-ray bursts (GRBs) are the most energetic electromagnetic sources in the Universe, releasing 1042–1047 J (refs. 1,2) in prompt gamma-ray radiation. Fifty years after their discovery, the ...

  • The Search for Extra-Galactic Intelligence Signals ...

    proposed as a potential tool for synchronized signal transmission (e.g., supernovae, Tang 1976; periodic orbital motions, Pace Walker 1975;stellarflares, Siebrand 1982; gamma-ray bursts, Corbet 1999). Here, the timing accuracy and the relative separation between the three points (the sender, the receiver,

  • Gamma wave - Wikipedia

    A gamma wave is a pattern of neural oscillation in humans with a frequency between 25 and 140 Hz, the 40-Hz point being of particular interest. Gamma rhythms are correlated with large scale brain network activity and cognitive phenomena such as working memory, attention, and perceptual grouping, and can be increased in amplitude via meditation or neurostimulation.

  • Mitotic gene conversion events induced in G1- synchronized ...

    synchronized yeast cells by gamma rays are similar to spontaneous conversion events Phoebe S. Lee and Thomas D. Petes1 Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC 27710 Contributed by Thomas D. Petes, February 17, 2010 (sent for review January 18, 2010) In a previous study, we mapped spontaneous mitotic reciprocal crossovers (RCOs) in a 120

  • Laser Technology for Compact, Narrow-bandwidth Gamma-ray ...

    precisely synchronized to the electron beam with sub-picosecond precision. Production of high brightness gamma-rays also requires a high quality, low emittance, and low energy spread electron beam. The electron beam is typically generated in a Linac, by accelerating electron bunches produced by the photoelectric effect at a photocathode RF gun. For optimum, high charge electron generation, the ...

  • Fiber fed x-ray/gamma ray imaging apparatus (Patent)

    Abstract. X-ray/gamma ray imaging apparatus is disclosed for detecting the position, energy, and intensity of x-ray/gamma ray radiation comprising scintillation means disposed in the path of such radiation and capable of generating photons in response to such radiation; first photodetection means optically bonded to the scintillation means and capable of generating an electrical signal ...

  • DNA damage in synchronized HeLa cells irradiated with ...

    Griggs HG, Bender MA. Ultraviolet and gamma-ray induced reproductive death and photoreactivation in a Xenopus tissue culture cell line. Photochem Photobiol. 1972 Jun; 15 (6):517–526. [Google Scholar] Han A, Korbelik M, Ban J. DNA-to-protein cross-linking in synchronized HeLa

  • 位置: 8600 Rockville Pike, Bethesda, MD
  • Data acquisition system for angle synchronized γ-ray ...

    We developed a fast read-out electronics for a gamma ray computed tomography radiation detector for measurements of two-phase flow distributions in rapidly rotating hydrodynamic machines. The electronics operates with a gamma ray detector comprising 320 single scintillation detector elements working in pulse counting mode. Digital pulses corresponding to gamma or x-ray absorption events in the ...

  • Gamma Definition of Gamma by Merriam-Webster

    Gamma definition is - the 3rd letter of the Greek alphabet. How to use gamma in a sentence.

  • Development of a Cerium bromide gamma ray

    15/09/2017  The data readout is synchronized with the gamma ray pulse by using the reference pulse from the FPGA. This reference pulse is used as sampling clock to initiate the data fetching from the processing electronics. The DAQS has additional features such as estimation of spectral parameters including energy resolution (Full Width Half Maximum-FWHM), peak position, energy calibration, and

  • GAMMA meaning in the Cambridge English Dictionary

    gamma definition: 1. the third letter of the Greek alphabet 2. → gamma radiation: 3. the third letter of the Greek. Learn more.

  • IceCube : Toward a km3 Neutrino Telescope

    Gamma ray astronomy is based on the same principle, but the observable distance, at TeV energy ranges, is limited to a few tens of Megaparsec due to absorption by pair production in the infrared and cosmic microwave background (see Fig. 1). Protons can propagate deeper distances than gamma rays at a given energy, but they are deflected by the extragalactic an d interstellar magnetic fields ...

  • The Gamma Camera: Basic Principles Radiology Key

    26/02/2016  The first gamma-ray “camera” capable of recording at all points in the image at one time was described by Hal Anger in 1953. He used a pinhole aperture in a sheet of lead to project a γ-ray image of the radionuclide distribution onto a radiation detector composed of a NaI(Tl) screen and a sheet of x-ray film. The film was exposed by the scintillation light flashes generated by the γ rays ...