Article
Instruments & Instrumentation
I. Parajuli, G. Ciovati, J. R. Delayen
Summary: Superconducting radio-frequency (SRF) cavities are fundamental building blocks of modern particle accelerators, operating at liquid helium temperatures to achieve high quality factors. To better understand the relationship between the distribution of trapped magnetic flux on the cavity surface and cavity materials, surface treatments, and environmental conditions, two high-resolution diagnostic tools have been designed and developed.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Engineering, Electrical & Electronic
Xijie Xiang, Lin Zhu, Jianing Li, Yixuan Wang, Tiejun Huang, Yonghong Tian
Summary: In this paper, we propose an end-to-end network to reconstruct high-resolution images from low-resolution spike streams. Our network adopts a multi-level features learning mechanism, including intra-stream feature extraction, inter-stream dependencies extraction, and joint features learning. Experimental results demonstrate that our network is superior to the combination of state-of-the-art intensity image reconstruction methods and super-resolution networks on simulated and real datasets.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
A. Romanenko, R. Harnik, A. R. Grassellino, R. Pilipenko, Y. Pischalnikov, Z. Liu, O. S. Melnychuk, B. Giaccone, O. Pronitchev, T. Khabiboulline, D. Frolov, S. Belomestnykh, A. Berlin, A. Hook
Summary: The study conducts the first light-shining-through-wall (LSW) search for dark photons using high-quality-factor superconducting radio frequency (SRF) cavities called Dark SRF. They establish a new exclusion limit and provide the world's best constraints on dark photons. This research serves as a proof of concept for the role of SRF cavities in LSW setups.
PHYSICAL REVIEW LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Li Zhang, Haiyang Zhan, Xinyuan Liu, Fei Xing, Zheng You
Summary: A high-performance lensless compound eye microsystem is developed for target motion perception through precise and fast orientation measurement. The microsystem combines multiple sub-FOVs formed by long-focal subeyes to image targets distributed in a panoramic range into a single multiplexing image sensor. It achieves wide-field and high resolution in a simple and easy-to-manufacture MEMS aperture array. The microsystem also achieves a hyperframe update rate through the electronic rolling shutter technique of the image sensor. The orientation measurement accuracy is 0.0023 degrees (3 sigma) in the x direction and 0.0028 degrees (3 sigma) in the y direction within a cone FOV of 120 degrees, with an update rate similar to 20 times higher than the frame rate.
MICROSYSTEMS & NANOENGINEERING
(2022)
Article
Astronomy & Astrophysics
Agnieszka Ruminska, Urszula Bak-Steslicka, Sarah E. Gibson, Yuhong Fan
Summary: Research shows that observations of solar coronal cavities in linear polarization are consistent with the theoretical model of flux rope formation and structure. The linear polarization features of the cavity are strongly correlated with the cavity's lifetime and spatial orientation.
ASTROPHYSICAL JOURNAL
(2022)
Article
Physics, Applied
S. Leith, M. Vogel, J. Fan, E. Seiler, R. Ries, X. Jiang
Summary: In recent years, researchers have shown increased interest in alternatives to bulk Nb for superconducting radio frequency (SRF) cavities, particularly focusing on thin films of Nb or other high T-c materials. Recent insights into the potential of single layer high -kappa materials have sparked additional research in this area.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Thermodynamics
Heng Zhang, Xuemin Zhao, Qiang Mei, Yue Wang, Shaoyun Song, Feng Yu
Summary: This research focuses on numerically investigating the thermal deformation of a high-resolution satellite camera under solar radiation and developing a thermal-structural finite element model of the camera. The study also proposes opto-thermo-mechanical analysis of the optical system, obtaining transient temperature distributions and performing modulation transfer function analysis. Results reveal the dynamic response of the optical system under transient temperature and predict the imagery quality of the satellite camera through thermal vacuum testing.
APPLIED THERMAL ENGINEERING
(2021)
Article
Astronomy & Astrophysics
Rui Luo, George Hobbs, Suk Yee Yong, Andrew Zic, Lawrence Toomey, Shi Dai, Alex Dunning, Di Li, Tommy Marshman, Chen Wang, Pei Wang, Shuangqiang Wang, Songbo Zhang
Summary: The software can simulate channelized, high-time resolution data streams from radio telescopes, including various signal characteristics and interference, which can be used for generating training data sets, developing new algorithms, and testing processing pipelines.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Instruments & Instrumentation
Junyoung Yoon, Chong Shik Park, Jungbae Bahng, Kyung-Ryul Kim, Seong Hee Park, Eiji Kako, Eun-San Kim
Summary: This paper presents the design and high-power testing of a fundamental power coupler for superconducting cavities. The coupler is a coaxial capacitive-type coupler with diagnostic ports for vacuum, arc, and electron pickups. The thermal intercepts and transition box were designed to optimize performance during high-power tests with a 20 kW solid-state power amplifier.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2021)
Article
Multidisciplinary Sciences
Yuki Morishita, Shunsuke Kurosawa, Akihiro Yamaji, Masateru Hayashi, Makoto Sasano, Taisuke Makita, Tetsushi Azuma
Summary: The study developed a high-resolution alpha imager for real-time measurement of plutonium dioxide particles at nuclear facility working sites, effectively evaluating internal exposure dose.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
Juby Thomas, Manika Gupta, Prashant K. Srivastava, Dharmendra K. Pandey, Rajat Bindlish
Summary: This study proposes a new method to estimate high-resolution Soil Hydraulic Parameters (SHPs) and provide high-resolution rootzone soil moisture (RZSM) products. The method consists of three phases: downsampling satellite soil moisture to estimate surface soil moisture, using downscaled soil moisture to estimate SHPs, and simulating surface soil moisture and RZSM using the derived SHPs.
Article
Astronomy & Astrophysics
Agustin Vallejo, Jorge Zuluaga, German Chaparro
Summary: On April 13, 2029, asteroid Apophis will pass by Earth, providing a unique opportunity for studying the asteroid at a close distance. This paper analyzes the conditions for observing the asteroid with bistatic radar technique, compiling a list of global observatories that could participate in radar observation campaigns. It is found that a global collaboration of observatories can produce high-resolution radar images and potentially allow for amateur detection of signals from large observatories.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Agustin Vallejo, Jorge I. Zuluaga, German Chaparro
Summary: On April 13, 2029, asteroid Apophis will pass by the Earth at a distance of about 31,000 kilometers, providing unique scientific opportunities for studying its characteristics. This paper analyzes the conditions for observing the asteroid from Earth, focusing on bistatic radar observations. By compiling a list of radio observatories around the world, the study estimates the observing conditions and concludes that a global collaboration can produce high-resolution radar images. It also suggests the potential for amateur radio enthusiasts to detect signals and citizen science projects. For visual observations, the Canary Islands are recommended for professionals and amateurs due to the apparent size of the asteroid.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Engineering, Electrical & Electronic
J. Golm, S. Arguedas Cuendis, S. Calatroni, C. Cogollos, B. Dobrich, J. D. Gallego, J. M. Garcia Barcelo, X. Granados, J. Gutierrez, I. G. Irastorza, T. Koettig, N. Lamas, J. Liberadzka-Porret, C. Malbrunot, W. L. Millar, P. Navarro, C. P. A. Carlos, T. Puig, G. J. Rosaz, M. Siodlaczek, G. Telles, W. Wuensch
Summary: The article discusses the axion particle as a candidate for cold dark matter and presents the research on coating cavities with superconducting materials to increase the quality factor in the axion dark matter detection experiment at CERN.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Engineering, Electrical & Electronic
I. M. Abdyukhanov, M. Alekseev, M. Krylova, A. G. Silaev, M. M. Potapenko, Y. S. Kraevskiy, V. A. Drobyshev, M. Kravtsova, K. A. Mareev, D. S. Novosilova, P. A. Lukianov, M. Polikarpova, A. S. Tsapleva, A. A. Dezhurnov, A. A. Lavrov, M. Y. Shlyakhov, S. M. Zernov, E. N. Gusev, S. Y. Syrtsov, S. A. Gorbushin, R. S. Konshin, A. Ivshin, R. R. Kasimov, K. A. Tokarev, A. V. Voloshin, E. N. Ryakhovskaya, S. Kotov
Summary: This paper presents the study results on the influence of deformation route, true strain value, and recrystallization heat treatment regimes on the structural and mechanical characteristics of high-purity niobium sheets. It aims to develop manufacturing regimes that meet the requirements for superconducting cavity applications.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Instruments & Instrumentation
Hirotaka Shimizu, Mitsuo Akemoto, Yasuo Arai, Sakae Araki, Alexander Aryshev, Masafumi Fukuda, Shigeki Fukuda, Junji Haba, Kazufumi Hara, Hitoshi Hayano, Yasuo Higashi, Yosuke Honda, Teruya Honma, Eiji Kako, Yuji Kojima, Yoshinari Kondo, Konstantin Lekomtsev, Toshihiro Matsumoto, Shinichiro Michizono, Toshinobu Miyoshi, Hirotaka Nakai, Hiromitsu Nakajima, Kota Nakanishi, Shuichi Noguchi, Toshiyuki Okugi, Masato Sato, Mikhail Shevelev, Toshio Shishido, Tateru Takenaka, Kiyosumi Tsuchiya, Junji Urakawa, Ken Watanabe, Seiya Yamaguchi, Akira Yamamoto, Yasuchika Yamamoto, Kazuyuki Sakaue, Seiichi Hosoda, Hokuto Iijima, Masao Kuriki, Ryuta Tanaka, Ayaka Kuramoto, Mathieu Omet, Ayaki Takeda
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2015)
Article
Instruments & Instrumentation
Ayaka Hattori, Hitoshi Hayano
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2017)
Article
Physics, Nuclear
Vijay Chouhan, Shigeki Kato, Keisuke Nii, Takanori Yamaguchi, Motoaki Sawabe, Hitoshi Hayano, Yoshiaki Ida
PHYSICAL REVIEW ACCELERATORS AND BEAMS
(2017)
Article
Instruments & Instrumentation
Hiroki Oikawa, Takeshi Higashiguchi, Hitoshi Hayano
REVIEW OF SCIENTIFIC INSTRUMENTS
(2018)
Article
Engineering, Electrical & Electronic
A. Yamamoto, C. Adolphsen, J. Carwardine, S. Fukuda, R. Geng, C. Ginsburg, E. Harms, H. Hayano, E. Kako, J. Kerby, L. Lilje, C. Nantista, N. Ohuchi, T. Peterson, P. Pierini, M. Ross, T. Shidara, N. Walker
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2013)
Article
Engineering, Electrical & Electronic
R. Carcagno, A. Hemmati, H. Hayano, V. S. Kashikhin, M. J. Kim, N. Kimura, L. Kokoska, S. Kotelnikov, J. Nogiec, D. F. Orris, R. Pilipenko, C. Sylvester, M. Takahashi, M. A. Tartaglia, T. Tosaka, T. Wokas, A. Yamamoto
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2014)
Article
Physics, Applied
Masao Kuriki, Hokuto Iijima, Seiichi Hosoda, Ken Watanabe, Hitoshi Hayano, Junji Urakawa, Goro Isoyama, Ryukou Kato, Keigo Kawase, Ayaka Kuramoto, Shigeru Kashiwagi, Kazuyuki Sakaue
JAPANESE JOURNAL OF APPLIED PHYSICS
(2013)
Article
Instruments & Instrumentation
Sean Walston, Stewart Boogert, Carl Chung, Pete Htsos, Joe Frisch, Jeff Gronberg, Hitoshi Hayano, Shantell Hinton, Yosuke Honda, Oleg Khainovski, Yury Kolomensky, Peter Loscutoff, Alexey Lyapin, Stephen Malton, Justin May, Douglas McCormick, Robert Meller, David Miller, Toyoko Orimoto, Marc Ross, Mark Slater, Steve Smith, Tonee Smith, Nobuhiro Terunuma, Mark Thomson, Junji Urakawa, Vladimir Vogel, David Ward, Glen White
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2013)
Article
Physics, Multidisciplinary
G. R. White, R. Ainsworth, T. Akagi, J. Alabau-Gonzalvo, D. Angal-Kalinin, S. Araki, A. Aryshev, S. Bai, P. Bambade, D. R. Bett, G. Blair, C. Blanch, O. Blanco, N. Blaskovic-Kraljevic, B. Bolzon, S. Boogert, P. N. Burrows, G. Christian, L. Corner, M. R. Davis, A. Faus-Golfe, M. Fukuda, J. Gao, H. Garcia-Morales, N. Geffroy, H. Hayano, A. Y. Heo, M. Hildreth, Y. Honda, J. Y. Huang, W. H. Hwang, Y. Iwashita, S. Jang, A. Jeremie, Y. Kamiya, P. Karataev, E. S. Kim, H. S. Kim, S. H. Kim, Y. I. Kim, S. Komamiya, K. Kubo, T. Kume, S. Kuroda, B. Lam, K. Lekomtsev, S. Liu, A. Lyapin, E. Marin, M. Masuzawa, D. McCormick, T. Naito, J. Nelson, L. J. Nevay, T. Okugi, T. Omori, M. Oroku, H. Park, Y. J. Park, C. Perry, J. Pfingstner, N. Phinney, A. Rawankar, Y. Renier, J. Resta-Lopez, M. Ross, T. Sanuki, D. Schulte, A. Seryi, M. Shevelev, H. Shimizu, J. Snuverink, C. Spencer, T. Suehara, R. Sugahara, T. Takahashi, R. Tanaka, T. Tauchi, N. Terunuma, R. Tomas, J. Urakawa, D. Wang, M. Warden, M. Wendt, A. Wolski, M. Woodley, Y. Yamaguchi, T. Yamanaka, J. Yan, K. Yokoya, F. Zimmermann
PHYSICAL REVIEW LETTERS
(2014)
Article
Physics, Nuclear
Mathieu Omet, Hitoshi Hayano, Ayaka Kuramoto, Toshihiro Matsumoto, Shinichiro Michizono, Takako Miura, Feng Qiu
PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS
(2014)
Article
Physics, Applied
Hiroki Oikawa, Takeshi Higashiguchi, Hitoshi Hayano
JAPANESE JOURNAL OF APPLIED PHYSICS
(2019)
Article
Physics, Applied
C. Z. Antoine, M. Aburas, A. Four, F. Weiss, Y. Iwashita, H. Hayano, S. Kato, T. Kubo, T. Saeki
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2019)
Article
Physics, Nuclear
Vijay Chouhan, Shigeki Kato, Keisuke Nii, Takanori Yamaguchi, Motoaki Sawabe, Takayuki Saeki, Hideaki Monjushiro, Hiroki Oikawa, Hayato Ito, Hitoshi Hayano, Yoshiaki Ida
PHYSICAL REVIEW ACCELERATORS AND BEAMS
(2019)
Article
Instruments & Instrumentation
Hayato Ito, Hitoshi Hayano, Takayuki Kubo, Takayuki Saeki
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2020)
Article
Materials Science, Multidisciplinary
Vijay Chouhan, Shigeki Kato, Yoshiaki Ida, Keisuke Nii, Takanori Yamaguchi, Hitoshi Hayano
Summary: The electropolishing process of a Nb superconducting RF coupon cavity showed variations in atomic compositions, Nb 3d peak shapes, and particle clusters on the surface, possibly affecting the performance of the cavity. Further analysis revealed the presence of C and F impurities in the particle clusters, indicating a potential limitation in the superconducting properties of the cavity. Optimal post-EP water rinsing conditions were effective at removing undesired particles and improving the performance of the cavity.
MATERIALS CHEMISTRY AND PHYSICS
(2021)