110752379
The High Dynamics Readout of PMT for BGO Calorimeter
For one cell of BGO-EM energy deposition of electron/gamma with energy above TeV is between 0.5 MIPs and 105 MIPs, the readout system need to cover this high dynamic range.
118425985
Spatial anisotropy: a method to study anisotropic flow in heavy ion collisions
We introduce a method to study anisotropic flow parameter vn as a collective probe to Quark Gluon Plasma in relativistic heavy ion collisions. The emphasis is put on the use of the Fourier expansion of initial spatial azimuthal distributions of participant nucleons in the overlapped region. The coefficients n of Fourier expansion are called the spatial anisotropy parameter for the n-th harmonic. We propose that collective dynamics can be studied by vn/n. In this paper, we will discuss in particular the second (n = 2) and the fourth (n = 4) harmonics.
38524395
Simulation studies of Micromegas and parallel ionization multiplier with woven mesh
We report simulation results of the Micromegas in a bulk and PIM (parallel ionization multiplier) with one or more layers of woven micromeshes based on 3D models and Garfield/ Magboltz. Studies are conducted for different detector geometries. Effects of wire diameter, mesh pitch, mesh effective thickness and gas mixture are investigated. The transverse diffusion of drifting electrons and broadening of electron clouds that affect electron transfer through the micromeshes are studied. Different arrangements of gas gains in the required avalanche and signal induction regions of a PIM-like configuration are studied. The motivation of this work is to understand the electron transfer process in Micromegas and PIMs constructed by using relatively thick woven micromeshes. We have attempted to find optimized PIM configurations in order to obtain high gas gain, fast rise time and other desirable detector properties.
117939789
Magnetic shield of PMT used in DAMPE electromagnetic calorimeter
The magnetic characteristics of photomultiplier tube R5610A-01 are studied in this paper. The experimental data shows that the gain of R5610A-01 loses about 53% when the magnetic field is 3G along its +X axis. A cylinder of one-layer permalloy strip is able to reduce the effect of 3G magnetic field on the PMT's gain to less than 1%.
112553011
MULTI-GAP RESISTIVE PLATE CHAMBER- A NEW TYPE OF DETECTOR FOR TIME OF FLIGHT
123771953
A high dynamic range readout unit for a calorimeter
A high dynamic range readout system, consisting of a multi-dynode readout PMT and a VA32 chip, is presented. An LED system is set up to calibrate the relative gains between the dynodes, and the ADC counts per MIPs from dynode 7 are determined under cosmic-ray calibration. A dynamic range from 0.5 MIPs to 1 x 10(5) MIPs is achieved.
119291775
Nuclear Shell Structure Evolution Theory
The Self-similar-structure shell model (SSM) comes from the evolution of the conventional shell model (SM) and keeps the energy level of SM single particle harmonic oscillation motion. In SM, single particle motion is the positive harmonic oscillation and in SSM, the single particle motion is the negative harmonic oscillation. In this paper a nuclear evolution equation (NEE) is proposed. NEE describes the nuclear evolution process from gas state to liquid state and reveals the relations among SM, SSM and liquid drop model (DM). Based upon SSM and NEE theory, we propose the solution to long-standing problem of nuclear shell model single particle spin-orbit interaction energy . We demonstrate that the single particle motion in normal nuclear ground state is the negative harmonic oscillation of SSM[1][2][3][4] 
Key words: negative harmonic oscillation, nuclear evolution equation, self-similar shell model
122968304
Does Rb in MSM deviate from the data
In this paper we compare the MSM predictions for Z-boson decay widths and the relevant ratios with new LEP data. We find that, among the parameters studied here, only the measured value of Rb exceeds that predicted in MSM by more than two standard deviations for mt=174+or-16 GeV.
123670045
Total cross sections inN-body problems: Finiteness and high energy asymptotics
We study the finiteness of total scattering cross sections from an arbitrary channel to a two-cluster channel and establish the high energy asymptotics for total scattering cross sections with initial two-cluster channel and those from an arbitrary channel to a two-cluster channel.
122968394
Multiscale technicolor and top quark decay
122672111
High PT probes of nuclear collisions
Abstract Jet quenching in high energy nuclear collisions is shown to provide new information on the energy loss mechanisms in dense matter near the quark-gluon plasma transition. In addition it is shown that A dependence of the inclusive p T spectra in p + A provides novel constraints on gluon shadowing in nuclei.