W. Chou - University of Georgia

W. Chou
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W. Chou
University of Georgia
United States

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Physics - Accelerator Physics (16)
High Energy Physics - Experiment (4)
Physics - Mesoscopic Systems and Quantum Hall Effect (3)
Physics - Instrumentation and Detectors (1)
Physics - Computational Physics (1)
Physics - Other (1)
High Energy Physics - Phenomenology (1)
Quantum Physics (1)
Quantitative Biology - Genomics (1)

Publications Authored By W. Chou

This study presents the first semi-quantum private comparison protocol under an almost-dishonest third party. The proposed protocol allows two classical participants to compare their secret information without compromising it's privacy. The security analyses indicate that the protocol is free from several well-known attacks. Read More

This paper discusses the cost consideration and a possible construction timeline of the CEPC-SPPC study based on a preliminary conceptual design that is being carried out at the Institute of High Energy Physics (IHEP) in China. Read More

We used continuous wave photoluminescence (cw-PL) and time resolved photoluminescence (TR-PL) spectroscopy to compare the properties of magnetic polarons (MP) in two related spatially indirect II-VI epitaxially grown quantum dot systems. In the ZnTe/(Zn,Mn)Se system the holes are confined in the non-magnetic ZnTe quantum dots (QDs), and the electrons reside in the magnetic (Zn,Mn)Se matrix. On the other hand, in the (Zn,Mn)Te/ZnSe system, the holes are confined in the magnetic (Zn,Mn)Te QDs, while the electrons remain in the surrounding non-magnetic ZnSe matrix. Read More

Following the discovery of the Higgs boson at LHC, new large colliders are being studied by the international high-energy community to explore Higgs physics in detail and new physics beyond the Standard Model. In China, a two-stage circular collider project CEPC-SPPC is proposed, with the first stage CEPC (Circular Electron Positron Collier, a so-called Higgs factory) focused on Higgs physics, and the second stage SPPC (Super Proton-Proton Collider) focused on new physics beyond the Standard Model. This paper discusses this second stage. Read More


This report summarizes the work of the Energy Frontier Higgs Boson working group of the 2013 Community Summer Study (Snowmass). We identify the key elements of a precision Higgs physics program and document the physics potential of future experimental facilities as elucidated during the Snowmass study. We study Higgs couplings to gauge boson and fermion pairs, double Higgs production for the Higgs self-coupling, its quantum numbers and $CP$-mixing in Higgs couplings, the Higgs mass and total width, and prospects for direct searches for additional Higgs bosons in extensions of the Standard Model. Read More

From 2005 through 2012, the Fermilab Main Injector provided intense beams of 120 GeV protons to produce neutrino beams and antiprotons. Hardware improvements in conjunction with improved diagnostics allowed the system to reach sustained operation at ~400 kW beam power. Transmission was very high except for beam lost at or near the 8 GeV injection energy where 95% beam transmission results in about 1. Read More

The discovery of a Higgs-like boson with mass near 126 GeV, at the LHC, has reignited interest in future energy frontier colliders. We propose here a proton-proton (pp) collider in a 100 km ring, with center of mass (CM) energy of ~100 TeV which would have substantial discovery potential for new heavy particles and new physics beyond the Standard Model. In the case that LHC experiments have already found exotic resonances or heavy "partner" particles, this collider could fill out the "tower" of resonances (thus e. Read More

This paper proposes a Higgs factory located in the Tevatron tunnel. It is based on a photon collider by using a recirculating e- linac and fiber laser technology. The design goal is 10,000 Higgs per year. Read More

This paper is a summary report of the ICFA Beam Dynamics Workshop 'Accelerators for a Higgs Factory: Linear vs. Circular' (HF2012). It discusses four types of accelerators as possible candidates for a Higgs factory: linear e+e- colliders, circular e+e- colliders, muon collider and photon colliders. Read More

Authors: Keith R. Bradnam1, Joseph N. Fass2, Anton Alexandrov3, Paul Baranay4, Michael Bechner5, İnanç Birol6, Sébastien Boisvert7, Jarrod A. Chapman8, Guillaume Chapuis9, Rayan Chikhi10, Hamidreza Chitsaz11, Wen-Chi Chou12, Jacques Corbeil13, Cristian Del Fabbro14, T. Roderick Docking15, Richard Durbin16, Dent Earl17, Scott Emrich18, Pavel Fedotov19, Nuno A. Fonseca20, Ganeshkumar Ganapathy21, Richard A. Gibbs22, Sante Gnerre23, Élénie Godzaridis24, Steve Goldstein25, Matthias Haimel26, Giles Hall27, David Haussler28, Joseph B. Hiatt29, Isaac Y. Ho30, Jason Howard31, Martin Hunt32, Shaun D. Jackman33, David B Jaffe34, Erich Jarvis35, Huaiyang Jiang36, Sergey Kazakov37, Paul J. Kersey38, Jacob O. Kitzman39, James R. Knight40, Sergey Koren41, Tak-Wah Lam42, Dominique Lavenier43, François Laviolette44, Yingrui Li45, Zhenyu Li46, Binghang Liu47, Yue Liu48, Ruibang Luo49, Iain MacCallum50, Matthew D MacManes51, Nicolas Maillet52, Sergey Melnikov53, Bruno Miguel Vieira54, Delphine Naquin55, Zemin Ning56, Thomas D. Otto57, Benedict Paten58, Octávio S. Paulo59, Adam M. Phillippy60, Francisco Pina-Martins61, Michael Place62, Dariusz Przybylski63, Xiang Qin64, Carson Qu65, Filipe J Ribeiro66, Stephen Richards67, Daniel S. Rokhsar68, J. Graham Ruby69, Simone Scalabrin70, Michael C. Schatz71, David C. Schwartz72, Alexey Sergushichev73, Ted Sharpe74, Timothy I. Shaw75, Jay Shendure76, Yujian Shi77, Jared T. Simpson78, Henry Song79, Fedor Tsarev80, Francesco Vezzi81, Riccardo Vicedomini82, Jun Wang83, Kim C. Worley84, Shuangye Yin85, Siu-Ming Yiu86, Jianying Yuan87, Guojie Zhang88, Hao Zhang89, Shiguo Zhou90, Ian F. Korf91
Affiliations: 1UC Davis, 2UC Davis, 3National Research University of Information Technology, 4Yale University, 5UW-Biotechnology Center, 6British Columbia Cancer Agency, 7DOE Joint Genome Institute, 8DOE Joint Genome Institute, 9ENS Cachan/IRISA, 10ENS Cachan/IRISA, 11Wayne State University, 12University of Georgia, 13CHUQ Research Center, 14University of Udine, 15British Columbia Cancer Agency, 16The Wellcome Trust Sanger Institute, 17UC Santa Cruz, 18University of Notre Dame, 19National Research University of Information Technology, 20EMBL-European Bioinformatics Institute, 21Duke University Medical Center, 22Baylor College of Medicine, 23Broad Institute, 24Laval University, 25UW-Biotechnology Center, 26EMBL-European Bioinformatics Institute, 27Broad Institute, 28UC Santa Cruz, 29University of Washington, 30DOE Joint Genome Institute, 31Duke University Medical Center, 32The Wellcome Trust Sanger Institute, 33British Columbia Cancer Agency, 34Broad Institute, 35Duke University Medical Center, 36Baylor College of Medicine, 37National Research University of Information Technology, 38EMBL-European Bioinformatics Institute, 39University of Washington, 40454 Life Sciences, 41National Biodefense Analysis and Countermeasures Center, 42HKU-BGI Bioinformatics Algorithms and Core Technology Research Laboratory, 43ENS Cachan/IRISA, 44Laval University, 45BGI-Shenzhen, 46BGI-Shenzhen, 47BGI-Shenzhen, 48Baylor College of Medicine, 49BGI-Shenzhen, 50Broad Institute, 51UC Berkeley, 52INRIA, 53National Research University of Information Technology, 54University of Lisbon, 55INRIA, 56The Wellcome Trust Sanger Institute, 57The Wellcome Trust Sanger Institute, 58UC Santa Cruz, 59University of Lisbon, 60National Biodefense Analysis and Countermeasures Center, 61University of Lisbon, 62UW-Biotechnology Center, 63Broad Institute, 64Baylor College of Medicine, 65Baylor College of Medicine, 66Broad Institute, 67Baylor College of Medicine, 68DOE Joint Genome Institute, 69UC San Francisco, 70University of Udine, 71Cold Spring Harbor Laboratory, 72UW-Biotechnology Center, 73National Research University of Information Technology, 74Broad Institute, 75University of Georgia, 76University of Washington, 77BGI-Shenzhen, 78The Wellcome Trust Sanger Institute, 79Baylor College of Medicine, 80National Research University of Information Technology, 81KTH Royal Institute of Technology, 82University of Udine, 83BGI-Shenzhen, 84Baylor College of Medicine, 85Broad Institute, 86HKU-BGI Bioinformatics Algorithms and Core Technology Research Laboratory, 87BGI-Shenzhen, 88BGI-Shenzhen, 89BGI-Shenzhen, 90UW-Biotechnology Center, 91UC Davis

Background - The process of generating raw genome sequence data continues to become cheaper, faster, and more accurate. However, assembly of such data into high-quality, finished genome sequences remains challenging. Many genome assembly tools are available, but they differ greatly in terms of their performance (speed, scalability, hardware requirements, acceptance of newer read technologies) and in their final output (composition of assembled sequence). Read More

This paper presents an 8 GeV Rapid Cycling Synchrotron (RCS) option for Project X. It has several advantages over an 8 GeV SC linac. In particular, the cost could be lower. Read More

Project-X is a leading candidate of the next major accelerator construction project at Fermilab. The mission need of Project-X is to establish an intensity frontier for particle physics research, or more precisely, to build a multi-MW proton source for neutrino and other particle studies. Coupled with an upgraded Main Injector (MI) and Recycler, an 8 GeV superconducting RF (SRF) H-minus linac meets this need [1]. Read More

A transition-free lattice is a basic requirement of a high-intensity medium-energy (several GeV) proton synchrotron in order to eliminate beam losses during transition crossing. An 8 GeV synchrotron is proposed as a principal component in an alternative hybrid design of Project-X [1]. This machine would be housed in the Fermilab antiproton source enclosure replacing the present Debuncher. Read More

We present evidence of magnetic ordering in type-II (Zn, Mn) Te quantum dots. This ordering is attributed to the formation of bound magnetic polarons caused by the exchange interaction between the strongly localized holes and Mn within the dots. In our photoluminescence studies, the magnetic polarons are detected at temperatures up to ~ 200 K, with a binding energy of ~ 40 meV. Read More

The magneto-photoluminescence of type-II (ZnMn)Te quantum dots is presented. As a result of the type-II band alignment Aharonov-Bohm (AB) oscillations in the photoluminescence intensity are evident, confirming previous predictions for the suitability of this geometry to control the optical Aharonov-Bohm effect in semiconductor systems. Moreover, the system demonstrates an interesting interplay between the AB effect and the spin polarization in diluted magnetic semiconductor quantum dots. Read More

Two barrier RF systems were fabricated, tested and installed in the Fermilab Main Injector. Each can provide 8 kV rectangular pulses (the RF barriers) at 90 kHz. When a stationary barrier is combined with a moving barrier, injected beams from the Booster can be continuously deflected, folded and stacked in the Main Injector, which leads to doubling of the beam intensity. Read More

A two-year Large Aperture Quadrupole (WQB) Project was completed in the summer of 2006 at Fermilab. Nine WQBs were designed, fabricated and bench-tested by the Technical Division. Seven of them were installed in the Main Injector and the other two for spares. Read More

This paper presents the modeling of time-structured multiturn injection for an upgraded Main Injector with the 8-GeV Superconducting RF proton driver, or an ILC-style linac, or a Project-X linac. The Radio-Frequency mismatch between a linac and the upgraded Main Injector will induce parasitic longitudinal painting in RF-phase direction. Several different scenarios with a choice of different RF parameters for single RF system and double RF system in the presence of longitudinal space charge have been investigated. Read More

Charge-exchange injection by means of carbon foils is a widely used method in accelerators. This paper discusses two critical issues concerning the use of carbon foils: efficiency and lifetime. An energy scaling of stripping efficiency was suggested and compared with measurements. Read More

This paper has been withdrawn by the author due to a crucial error in the force equation. Read More

This paper introduces a new method for stacking beams in the longitudinal phase space. It uses RF barriers to confine and compress beams in an accelerator, provided that the machine momentum acceptance is a few times larger than the momentum spread of the injected beam. This is the case for the Fermilab Main Injector. Read More

This lecture is an introduction to the design of a spallation neutron source and other high intensity proton sources. It discusses two different approaches: linac-based and synchrotron-based. The requirements and design concepts of each approach are presented. Read More