200px-TcLiu

Liu, Tsung-Che 劉宗哲

Position

Distinguished Junior Fellow

Office

R916, Astro-Math Bldg.

Email

tcliu@ntu.edu.tw

Phone

+886 2 3366-8645

Selected Publications

TC Liu, KC Lai, GL Lin, “Neutrino Flavor Ratios on the Earth for Decay and Oscillation Scenarios”, Mod. Phys. Lett. A 28, 134005 (2013)
JE Kim, H Lim, JW Nam, S Brandt et al., “Readout of the UFFO Slewing Mirror Telescope to detect UV/optical photons from Gamma-Ray Bursts”, Journal of Instrumentation 8 (07), P07012 (2013)
IH Park, S Brandt, C Budtz-Jørgensen et al., “Ultra-Fast Flash Observatory for the observation of early photons from gamma-ray bursts”, New Journal of Physics 15 (2), 023031 (2013)
J Nam, S Ahmad, K Ahn, P Barrillon et al., “The Uffo Slewing Mirror Telescope for Early Optical Observation from Gamma Ray Bursts”, Mod. Phys. Lett. A 28, 1340003 (2013)
J Lee, S Jeong, JE Kim, YW Kim et al., “Design, Construction and Performance of the Detector for UFFO Burst Alert & Trigger Telescope”, EAS Publications Series 61, 525-529 (2013)
MHA Huang, S Ahmad, P Barrillon et al., “The Calibration and Simulation of the GRB trigger detector of the Ultra Fast Flash Observatory”, EAS Publications Series 61, 531-535 (2013)
J Nam, KB Ahn, M Cho, S Jeong et al., “Development of Motorized Slewing Mirror Stage for the UFFO Project”, EAS Publications Series 61, 573-577(2013)
J Řípa, S Ahmad, P Barrillon, S Brandt et al., “In-Flight Calibrations of UFFO-Pathfinder”, EAS Publications Series 61, 579-581 (2013)
H Lim, S Ahmad, P Barrillon, S Brandt et al., “The Slewing Mirror Telescope and the Data-Acquisition System for the UFFO-Pathfinder”, EAS Publications Series 61, 537-543(2013)
IH Park, S Ahmad, P Barrillon, S Brandt et al., “Ultra-Fast Flash Observatory: Fast Response Space Missions for Early Time Phase of Gamma Ray Bursts”, EAS Publications Series 61, 501-515(2013)

B Grossan, IH Park, S Ahmad et al., “A next generation Ultra-Fast Flash Observatory (UFFO-100) for IR/optical observations of the rise phase of gamma-ray bursts”, SPIE Astronomical Telescopes+ Instrumentation, 84432R-84432R-13 (2012)
KC Lai, GL Lin, TC Liu, “Classifying and probing flavor transition mechanisms of astrophysical high energy neutrinos”, Journal of Physics: Conference Series 375 (5), 052040(2012)
P Allison et al., “Design and initial performance of the Askaryan Radio Array prototype EeV neutrino detector at the South Pole”, Astroparticle physics 35 (7), 457-477 (2012)
KB Ahn, S Jeong, SW Kim et al., “Opto-mechanical performances of slewing mirror space telescope for GRB detection”, SPIE Optical Systems Design, 81671C-81671C-7

P Chen, S Ahmad, K Ahn et al., “The UFFO (Ultra Fast Flash Observatory) Pathfinder: Science and Mission”, arXiv preprint arXiv:1106.3929
H Lim, S Ahmad, P Barrillon et al., “The Ultra-Fast Flash Observatory’s space GRB mission and science”, Proceedings of the International Astronomical Union 7 (S279), 349-350 (2011)
G.W.Na, K.-B.Ahm, H.S.Choi et al., “Data Acquisition System for the UFFO Pathfinder”, proc. International Cosmic Ray Conference 32nd, 9, 227 (2011)
A Jung, S Ahmad, KB Ahn et al., “Design and Fabrication of Detector Module for UFFO Burst Alert & Trigger Telescope”, proc. International Cosmic Ray Conference 32nd, 9, 235 (2011) arXiv preprint arXiv:1106.3802
J.E. Kim, H. Lim, A. Jung et al., “Implementation of the readout system in the UFFO Slewing Mirror Telescope”, proc. International Cosmic Ray Conference 32nd, 9, 239 (2011)
S. Jeong ,K. -B.Ahm, J. W. Nam et al., “Optical Performances of Slewing Mirror Telescope for UFFO-Pathfinder”, proc. International Cosmic Ray Conference 32nd, 9, 243 (2011)
GL Lin, KC Lai, TC Liu, “Probing Flavor Transition Mechanisms of Astrophysical Neutrinos”, PoS(EPS-HEP2011)047 (2011)
GL Lin, TC Liu, KC Lai, MA Huang, “Determinations of flavor ratios and flavor transitions of astrophysical neutrinos”, arXiv preprint arXiv:1103.3774
KC LAI, MA HUANG, GLIN LIN, TC LIU, “Determining the high energy neutrino flavor ratio at the astrophysical source”, International Cosmic Ray Conference 32nd 4, 257 (2011)
KC Lai, GL Lin, TC Liu et al., “Cosmogenic Tau Neutrino Induced Radio Emission”, International Journal of Modern Physics: Conference Series 1, 157-162(2011)

KC Lai, GL Lin, TC Liu, “Flavor transition mechanisms of propagating astrophysical neutrinos: A model independent parametrization”, Physical Review D 82 (10), 103003 (2010)
KC Lai, GL Lin, TC Liu, “Neutrino flavor ratio on Earth and at astrophysical sources”, Progress in Particle and Nuclear Physics 64 (2), 420-422(2010)
TC Liu, MA Huang, GL Lin, “New Parameters for Determining the Neutrino Flavor Ratio at the Astrophysical Source”, arXiv preprint arXiv:1004.5154 (2010)

KC Lai, GL Lin, TC Liu, “Determination of the neutrino flavor ratio at the astrophysical source”, Physical Review D 80 (10), 103005(2009)
KC Lai, GL Lin, TC Liu, J Nam, CC Chen, “GeoSynchrotron Radiation from Earth Skimming Tau Neutrino Shower”, PoS EPS-HEP2009 2009:105,(2009)
GL Lin, KC Lai, TC Liu “Determining the Flavor Ratio of Astrophysical Neutrinos”, PoS EPS-HEP2009 2009:103,(2009)
JL Liu, SS Zhang, Z Cao et al., “Simulation of the cosmic ray tau neutrino telescope (CRTNT) experiment”, Journal of Physics G: Nuclear and Particle Physics 36 (7), 075201 (2009)

TC Liu, MA Huang, “Simulation of Horizontal Extensive Air Shower”, International Cosmic Ray Conference 4, 609-612(2008)

YS Yeh, CH Wang, HM Liu et al., “Simulating neutron propagations with FLUKA, GEANT4 and MCNP”, Nuclear Science Symposium Conference Record, 2007. NSS’07. IEEE 3, 2016-2018 (2007)
GL Lin, TC Liu, MA Huang et al., “Laboratory astrophysics in Taiwan”, International Journal of Modern Physics B 21 (03n04), 378-388(2007)

TC Liu, FY Chang, CC Chen et al., “FLASH-TW experiment status report”, International Cosmic Ray Conference 8, 275(2005)

Biography:

In 2003 to 2005, I designed a experiment to generate the extensive air shower in laboratory. 6*10^8 electrons with 1.5 GeV energy injected to the instrument and generate the secondary particles. The CCD camera detect the cherenkov radiation, which emitted by charged particle. We use the Geant4 to verify the experimental result. The experimental data agree with the GEANT4 simulation result.

In 2006 to 2007, I use the GEANT4 to simulate the proton therapy. Low energy proton interact with different materials, such as pure water, muscle, or bone. In this study, I analyse the energy loss in the human body. It is useful to apply hadron beam to kill the cancer cells of patient. In this study, Y-S Yeh and me also simulate the low energy neutron interacting with water by using GEANT4, FLUKA and MCNP, three major simulation programs in nuclear physics. The result of Geant4 simulation is different with the other two program in the several MeV level.

In 2007 to 2008, I go to IHEP to help the CRTNT (Cosmic Ray Tau Neutrino Telescope) group estimate the high energy tau neutrino flux in real geometry. At that time, I simulate the high energy tau neutrino interacting with Earth and generate the tau leptons on the surface of Earth by SHINIE (Simulation of High Energy Neutrino Interacting with the Earth). NCTU & NUU high energy particle group. SHINIE is develop by This program simulate the neutrinos interacting with different materials in the earth. SHINE can output the all information about the interaction (Such as particle direction, interaction position in the earth, particle energy etc.). then, we use the CORSIKA to simulate the extensive shower in the atmosphere. By combining the tau flux and Shower simulation result, CRTNT estimate the tau neutrino events by those simulation.

In early 2009, Prof. J.W. Nam, Prof. Guey-Lin Lin, Dr. KC Lai, Chi-Chin Chen and me use CORSIKA simulated extensive air shower structure to calculate the coherent geosynchrotron radio emissions of the tau decay above 10^17 eV. We present the pattern and spectrum of radio waves and discuss their detection by radio antennae.

Prof. Guey-Lin Lin, Dr. KC Lai and me reconstructed the neutrino flavor ratio at the source. We considered the global fitting values of neutrino mixing angle to analyse the possible flavor ratio of source. After 2011, I started working in Leung Center for Cosmology and Particle Astrophysics, National Taiwan university and joined the Askaryan Radio Array (ARA) and Ultra-Fast Flash Observatory (UFFO) project. ARA project is a new detector deployed at the South Pole designed to detect high energy Neutrinos using radio-frequency signal.

In the 2010-2011 austral summer a prototype we refer to as “The test bed” was deployed about 1km away from the South Pole station with antennas down to 30m deep. It is successfully taking data as you read. We also installated of additional three stations in December 2011. All stations(37) for a ~200km^2 array is plan to set up before 2021. UFFO is a satellite telescope to observe the prompt signals of gamma-ray bursts. In this project, I simulated the particle response and thermal effect of UFFO detector. The satelite plan to launch at 2014 Fall.