Gotowe bibliografie tematyczne / GHz-bursts

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Gotowa bibliografia na temat „GHz-bursts”

Autor: Grafiati

Data publikacji: 12 października 2024

Data aktualizacji: 31 lipca 2025

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Artykuły w czasopismach na temat "GHz-bursts"

White, Stephen M., Masumi Shimojo, Kazumasa Iwai, et al. "Electron Cyclotron Maser Emission and the Brightest Solar Radio Bursts." Astrophysical Journal 969, no. 1 (2024): 3. http://dx.doi.org/10.3847/1538-4357/ad4640.

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Abstract This paper investigates the incidence of coherent emission in solar radio bursts, using a revised catalog of 3800 solar radio bursts observed by the Nobeyama Radio Polarimeters from 1988 to 2023. We focus on the 1.0 and 2.0 GHz data, where radio fluxes of order 1010 Jy have been observed. Previous work has suggested that these bursts are due to electron cyclotron maser (ECM) emission. In at least one well-studied case, the bright emission at 1 GHz consists of narrowband spikes of millisecond duration. Coherent emission at 1 GHz can be distinguished from traditional incoherent gyrosync

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Жданов, Дмитрий, Dmitriy Zhdanov, Сергей Лесовой, Sergey Lesovoi, Сусанна Тохчукова, and Susanna Tokhchukova. "Sources of type III solar microwave bursts." Solnechno-Zemnaya Fizika 2, no. 2 (2016): 12–21. http://dx.doi.org/10.12737/17341.

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Microwave fine structures allow us to study plasma evolution in an energy release region. The Siberian Solar Radio Telescope (SSRT) is a unique instrument designed to examine fine structures at 5.7 GHz. A complex analysis of data from RATAN-600, 4–8 GHz spectropolarimeter, and SSRT, simultaneously with extreme UV data, made it possible to localize sources of III type microwave drift bursts in August 10, 2011 event within the entire frequency band of burst occurrences, as well as to determine the most probable region of primary energy release. To localize sources of III type bursts from RATAN-6

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Жданов, Дмитрий, Dmitriy Zhdanov, Сергей Лесовой, Sergey Lesovoi, Сусанна Тохчукова, and Susanna Tokhchukova. "Sources of type III solar microwave bursts." Solar-Terrestrial Physics 2, no. 2 (2016): 15–27. http://dx.doi.org/10.12737/20996.

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Microwave fine structures allow us to study plasma evolution in an energy release region. The Siberian Solar Radio Telescope (SSRT) is a unique instrument designed to examine fine structures at 5.7 GHz. A complex analysis of data from RATAN-600, 4–8 GHz spectropolarimeter, and SSRT, simultaneously with EUV data, made it possible to localize sources of III type microwave bursts in August 10, 2011 event within the entire frequency band of burst occurrence, as well as to determine the most probable region of primary energy release. To localize sources of III type bursts from RATAN-600 data, an or

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Palliyaguru, Nipuni T., Devansh Agarwal, Golnoosh Golpayegani, et al. "A targeted search for repeating fast radio bursts associated with gamma-ray bursts." Monthly Notices of the Royal Astronomical Society 501, no. 1 (2020): 541–47. http://dx.doi.org/10.1093/mnras/staa3352.

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ABSTRACT The origin of fast radio bursts (FRBs) still remains a mystery, even with the increased number of discoveries in the last 3 yr. Growing evidence suggests that some FRBs may originate from magnetars. Large, single-dish telescopes such as Arecibo Observatory (AO) and Green Bank Telescope (GBT) have the sensitivity to detect FRB 121102-like bursts at gigaparsec distances. Here, we present searches using AO and GBT that aimed to find potential radio bursts at 11 sites of past gamma-ray bursts that show evidence for the birth of a magnetar. We also performed a search towards GW170817, whic

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Sawant, H. S., R. R. Rosa, J. R. Cecatto, and N. Gopalswamy. "Solar Simple Bursts Observed with High Spectral Resolution in the 18-23 GHz Range." International Astronomical Union Colloquium 142 (1994): 693–95. http://dx.doi.org/10.1017/s0252921100077976.

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AbstractFor the first time, solar bursts in the frequency range of (18-23) GHz have been observed with high-time (0.6-1.2 s) and high-frequency resolution (1 GHz), by using the Itapetinga 13.7m diameter antenna. Here, we investigate the microwave type “simple low level (< 10 SFU) bursts” associated with the impulsive phase of solar flares. Observed properties of these simple bursts are: rise time tr ~3 s, decay time td ~ 5 s and spectral index ranging between −1 and −4. These bursts were found to be associated with SF or SN flares as seen in Hα. The above properties suggest that they are li

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Kai, Keizo, Takeo Kosugi, and Nariaki Nitta. "Flux Relations between Hard X-Rays and Microwaves for Both Impulsive and Extended Solar Flares." Publications of the Astronomical Society of Japan 37, no. 1 (1985): 155–62. https://doi.org/10.1093/pasj/37.1.155.

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Abstract The correlation of peak fluxes between hard X-rays and microwaves from solar flares was reexamined separately for impulsive and extended bursts using 61 events recorded with both the hard X-ray spectrometer aboard the Hinotori satellite and the 17-GHz polarimeter at Nobeyama. (1) For impulsive bursts FR = 37.2 Fx0.77 with a small scatter of 0.3 orders of magnitude (rms), where FR is the 17-GHz peak flux in sfu and Fx is the hard X-ray peak flux integrated over 67–152 keV in photons s–1 cm–2. (2) Extended bursts deviate systematically above the regression line derived for impulsive bur

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Houben, L. J. M., L. G. Spitler, S. ter Veen, J. P. Rachen, H. Falcke, and M. Kramer. "Constraints on the low frequency spectrum of FRB 121102." Astronomy & Astrophysics 623 (March 2019): A42. http://dx.doi.org/10.1051/0004-6361/201833875.

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While repeating fast radio bursts (FRBs) remain scarce in number, they provide a unique opportunity for follow-up observations that enhance our knowledge of their sources and potentially of the FRB population as a whole. Attaining more burst spectra could lead to a better understanding of the origin of these bright, millisecond-duration radio pulses. We therefore performed ∼20 h of simultaneous observations on FRB 121102 with the Effelsberg 100 m radio telescope and the low frequency array (LOFAR) to constrain the spectral behaviour of bursts from FRB 121102 at 1.4 GHz and 150 MHz. This campai

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Kawabata, K., and H. Ogawa. "Solar Millimeter Wave Bursts." International Astronomical Union Colloquium 104, no. 2 (1989): 191–94. http://dx.doi.org/10.1017/s0252921100154132.

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Ye, Hanyu, Lilia Pontagnier, Abdelkrim Bendahmane, et al. "Programmable burst-mode laser system delivering picosecond pulses with continuously tunable 1 to 7 GHz pulse repetition rate and up to 1 kW average power." EPJ Web of Conferences 307 (2024): 02029. http://dx.doi.org/10.1051/epjconf/202430702029.

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We report on a laser producing bursts of GHz picosecond pulses with pulse repetition rate between 1 and 7.5 GHz, tens to thousands pulses per burst, 1 kW average power and inJ energy per burst. © 2024 The Author(s).

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Kosugi, Takeo. "Directivity of Radio Emission from Solar Flares." Publications of the Astronomical Society of Japan 37, no. 3 (1985): 575–89. https://doi.org/10.1093/pasj/37.3.575.

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Abstract The center-limb variation of the solar microwave burst intensity is investigated statistically with a sufficient number of events (~ 1000) at 17 GHz far above the mean turnover frequency of the microwave burst spectrum. The intensity of bursts (except that of GRF bursts) is independent of the disk longitude, which is slightly different from the results so far obtained below 10 GHz and also is in contradiction to the theoretical prediction by Takakura and Scalise (1970; AAA 3.077.005). Several possible models are proposed to explain why the gyrosynchrotron emission is apparently isotro

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Rozprawy doktorskie na temat "GHz-bursts"

Balage, Pierre. "Etude de l’interaction des matériaux à gap avec des lasers femtosecondes en mode rafale GHz." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0164.

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Ces deux dernières décennies, la technologie laser femtoseconde a gagné en maturité et fiabilité. Cette évolution lui a permis d’être mise en œuvre dans de nombreux secteurs industriels pour des applications de micro-usinage de précision pour lesquelles la brièveté de l’impulsion constitue un atout incontestable. Cependant, la pénétration de cette technologie dans l’industrie est freinée par le manque de productivité de ces procédés. En effet, cette productivité est bien en-deçà des attentes industrielles. Plusieurs stratégies sont à l’étude pour lever ce verrou technologique et optimiser la p

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Książki na temat "GHz-bursts"

Tlamicha, Antonín. Spectral observations of solar radio bursts at 2.0-4.5 GHz: January-August 1991. Astronomical Institute of the Czechoslovak Academy of Sciences], 1991.

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Tlamicha, Antonín. Spectral observations of solar radio bursts at 2.0-4.5 GHz: January-December 1990. Astronomical Institute of the Czechoslovak Academy of Sciences], 1991.

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Tlamicha, Antonín. Spectral observations of solar radio bursts in the range of 2.0-4.5 GHz: April-December 1989. Astronomical Institute of the Czechoslovak Academy of Sciences], 1990.

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Streszczenia konferencji na temat "GHz-bursts"

Žemaitis, Andrius, Saulė Steponavičiūtė, Paulius Gečys, and Mindaugas Gedvilas. "Femtosecond GHz bursts for surface laser polishing." In Laser-based Micro- and Nanoprocessing XIX, edited by Rainer Kling, Wilhelm Pfleging, and Koji Sugioka. SPIE, 2025. https://doi.org/10.1117/12.3040680.

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Laçin, Mesut, Paul Repgen, Amirhossein Maghsoudi, and Fatih Ömer İlday. "Ultrafast laser system with record GHz repetition rate in burst mode from all single-mode fiber." In Advanced Solid State Lasers. Optica Publishing Group, 2024. https://doi.org/10.1364/assl.2024.atu5a.2.

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We present a novel laser system integrated within strictly single-mode fibers, capable of generating bursts of 100-fs pulses at a 50 GHz repetition rate with an average power of 100 W. This configuration facilitates highly efficient and precise material processing in the ablation-cooled regime.

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Nyenhuis, Fabian, Andreas Michalowski, and Johannes A. L'huillier. "Surface treatment with GHz-bursts." In Laser-based Micro- and Nanoprocessing XIV, edited by Udo Klotzbach, Rainer Kling, and Akira Watanabe. SPIE, 2020. http://dx.doi.org/10.1117/12.2544337.

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Bartulevičius, T., M. Lipnickas, K. Madeikis, R. Burokas, D. Andriukaitis, and A. Michailovas. "Versatile Ultrashort Pulse Laser Tunable up to Nanosecond Range." In Advanced Solid State Lasers. Optica Publishing Group, 2023. http://dx.doi.org/10.1364/assl.2023.atu2a.6.

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A versatile industrial-grade 30 W-level average power femtosecond laser operating in single-pulse, GHz-burst (short-, long-bursts, GHz-bursts-in-MHz-bursts) regimes, with the ability to tune pulse duration from femtosecond up to nanosecond range is introduced in this work.

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"High efficiency femtosecond laser ablation with GHz level bursts." In ICALEO 2018: 37th International Congress on Applications of Lasers & Electro-Optics. Laser Institute of AmericaLIA, 2018. https://doi.org/10.2351/7.0004082.

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We report on a simple and easy to use GHz amplified femtosecond laser source. The laser source is based on a passively mode-locked oscillator with a near GHz repetition rate. GHz pulses are then selected, and the obtained bursts of pulses are further amplified in a high-power amplifier chain. The presented GHz femtosecond laser source is used with a galvanometric scanner to perform ablation experiments on copper, aluminum and stainless steel. Specific ablation rates of 0.7, 2.3 and 1.4 mm3/min/W are reached, respectively. The role of the important experimental parameters, such as the number of

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Kleinert, Jan, Zhibin Lin, and Hisashi Matsumoto. "Ultrafast laser ablation of copper with ~GHz bursts." In Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXIII, edited by Beat Neuenschwander, Gediminas Račiukaitis, Tetsuya Makimura, and Costas P. Grigoropoulos. SPIE, 2018. http://dx.doi.org/10.1117/12.2294041.

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Manek-Hönninger, Inka, Samba Niane, Guillaume Bonamis, et al. "High aspect ratio and high-speed glass drilling with femtosecond GHz-bursts." In CLEO: Applications and Technology. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_at.2022.jth6a.3.

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We report on high aspect ratio and high-speed glass drilling with femtosecond GHz-bursts. The drilling process dynamics of deep and high-quality holes in different glasses and sapphire is monitored by in-situ microscopy and thermal imaging.

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Balage, Pierre, John Lopez, Guillaume Bonamis, Clemens Hönninger, and Inka Manek-Hönninger. "Long and crack-free holes in glass by top-down drilling with femtosecond laser GHz-bursts." In CLEO: Applications and Technology. Optica Publishing Group, 2023. http://dx.doi.org/10.1364/cleo_at.2023.am4r.3.

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We report on extremely long, high quality, and crack-free holes in sodalime and fused silica by laser drilling with femtosecond GHz-bursts, where aspect ratios exceeding 30 and even 70 have been obtained, respectively.

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Obata, Kotaro, Francesc Caballero-Lucas, Shota Kawabata, Godai Miyaji, and Koji Sugioka. "High-speed ablation of crystalline silicon by femtosecond laser BiBurst mode with GHz burst in MHz burst." In Conference on Lasers and Electro-Optics/Pacific Rim. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleopr.2022.cthp5d_02.

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We demonstrate highly efficient ablation of silicon by use of BiBurst mode, which is composed of GHz bursts in MHz bursts. Ablation by the conventional irradiation scheme of femtosecond laser pulses (single-mode) generates detrimental damage on the ablated surface due to air ionization at the intensity above a critical value. In contrast, the BiBurst mode ablation can prevent the air ionization at the input power equal to or even higher than the single-mode due to lower intra-pulse intensities. Thus, BiBurst mode can achieve 23 times ablation speed without degrading the ablation quality compar

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Momeni, Ashkan, and Koji Sugioka. "Femtosecond Laser Ablation of Silicon using GHz to THz Burst Pulses: Numerical Simulation." In JSAP-Optica Joint Symposia. Optica Publishing Group, 2023. http://dx.doi.org/10.1364/jsapo.2023.19p_b205_8.

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In recent years, laser processing with GHz and THz bursts of femtosecond pulses has attracted great attention to improving the efficiency of laser-induced microfabrication [3, 4]. The efficient absorption of laser energy in the GHz burst and the heat-accumulation effect have been proposed as the main mechanisms for ablation enhancement [3-5]. However, the possible mechanisms have not yet been fully elucidated and more investigations are needed. Therefore, in this study, we used COMSOL Multiphysics to simulate the GHz and THz burst mode femtosecond laser ablation of silicon and investigate the

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