A5075389795- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
National Synchrotron Radiation Research Center
2022
National Chung Hsing University
2022
Institute of Physics, Academia Sinica
2022
National Central University
2022
This Letter reports on the first results from Taiwan Axion Search Experiment with a Haloscope, search for axions using microwave cavity at frequencies between 4.707 50 and 4.798 15 GHz. Apart nonaxion signals, no candidates significance of more than 3.355 were found. The experiment excludes models axion-two-photon coupling $|{g}_{a\ensuremath{\gamma}\ensuremath{\gamma}}|\ensuremath{\gtrsim}8.1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}14}\text{ }\text{...
This paper proposes a half-bridge parallel dual LLC resonant converter with wide output voltage range. The proposed uses conventional double converter. On the primary side of converter, only one two half bridges is used to control loops. Due resonance active switches can achieve ZVS (zero-voltage switching), and rectifier diode also ZCS (zero-current thus switching loss reduced. current stress be reduced power distributed on both and/or secondary side. A regulation circuit designed function...
We report on a holoscope axion search experiment near 19.6 µeV from the Taiwan Axion Search Experiment with Haloscope collaboration. This is carried out via frequency-tunable cavity detector volume V = 0.234 liter in magnetic field B0 8 T. With signal receiver that has system noise temperature Tsys ≅ 2.2 K and an time of about one month, excludes values axion–photon coupling constant gaγγ ≳ 8.1 × 10−14 GeV−1, factor 11 above Kim–Shifman–Vainshtein–Zakharov benchmark model, at 95% confidence...
This paper presents the analysis of data acquired during first physics run Taiwan Axion Search Experiment with Haloscope (TASEH), a search for axions using microwave cavity at frequencies between 4.70750 and 4.79815 GHz. The were collected from October 13, 2021 to November 15, 2021, are referred as CD102 data. TASEH excludes models axion-two-photon coupling $|{g}_{a\ensuremath{\gamma}\ensuremath{\gamma}}|\ensuremath{\gtrsim}8.1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}14}\text{...