scholarly journals PARTICLE IDENTIFICATION STUDIES WITH AN ALICE TEST TPC

2007 ◽  
Vol 16 (07n08) ◽  
pp. 2457-2462 ◽  
Author(s):  
◽  
PETER CHRISTIANSEN
Keyword(s):  
Energy Loss ◽  
Theoretical Calculations ◽  
Quantitative Agreement ◽  
Particle Identification ◽  
Field Cage ◽  
Loss Distribution ◽  
Good Quantitative Agreement

Using a test TPC, consisting of the ALICE TPC field cage prototype in combination with the final ALICE TPC readout and electronics, the energy loss distribution and resolution were measured for identified protons. The measurements were compared to theoretical calculations and good quantitative agreement was found when detector effects were taken into account. The implications for particle identification are discussed.

Steady streaming within a periodically rotating sphere

2008 ◽  
Vol 608 ◽  
pp. 71-80 ◽  
Author(s):  
RODOLFO REPETTO ◽  
JENNIFER H. SIGGERS ◽  
ALESSANDRO STOCCHINO
Keyword(s):  
Series Expansion ◽  
Oscillation Frequency ◽  
Small Amplitude ◽  
Quantitative Agreement ◽  
Torsional Oscillations ◽  
Rotating Sphere ◽  
Good Quantitative Agreement ◽  
Steady Streaming ◽  
Theory And Experiments ◽  
Streaming Flow

We consider the flow in a spherical chamber undergoing periodic torsional oscillations about an axis through its centre, and analyse it both theoretically and experimentally. We calculate the flow in the limit of small-amplitude oscillations in the form of a series expansion in powers of the amplitude, finding that at second order, a steady streaming flow develops consisting of two toroidal cells. This streaming behaviour is also observed in our experiments. We find good quantitative agreement between theory and experiments, and we discuss the dependence of the steady streaming behaviour as both the oscillation frequency and amplitude are varied.

scholarly journals Chemical identification through two-dimensional electron energy-loss spectroscopy

2020 ◽  
Vol 6 (28) ◽  
pp. eabb4713
Author(s):  
Renwen Yu ◽  
F. Javier García de Abajo
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Electron Energy Loss Spectroscopy ◽  
Electronic Device ◽  
Theoretical Calculations ◽  
Chemical Species ◽  
High Sensitivity ◽  
Two Dimensional ◽  
Excitation Spectra ◽  
Electron Energy Loss

We explore a disruptive approach to nanoscale sensing by performing electron energy loss spectroscopy through the use of low-energy ballistic electrons that propagate on a two-dimensional semiconductor. In analogy to free-space electron microscopy, we show that the presence of analyte molecules in the vicinity of the semiconductor produces substantial energy losses in the electrons, which can be resolved by energy-selective electron injection and detection through actively controlled potential gates. The infrared excitation spectra of the molecules are thereby gathered in this electronic device, enabling the identification of chemical species with high sensitivity. Our realistic theoretical calculations demonstrate the superiority of this technique for molecular sensing, capable of performing spectral identification at the zeptomol level within a microscopic all-electrical device.

scholarly journals Plasmonic Metalattices: A Correlated Monochromated Electron Energy Loss Study and Theoretical Calculations

2019 ◽  
Vol 25 (S2) ◽  
pp. 678-679
Author(s):  
Parivash Moradifar ◽  
Lei Kang ◽  
Pratibha Mahale ◽  
Yunzhi Liu ◽  
Nabila N. Nova ◽  
...  
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Theoretical Calculations ◽  
Electron Energy Loss

A Lagrangian Reactive Transport Simulator with Successive Paths and Stationary-States: Concepts, Implementation and Verification

1989 ◽  
Vol 176 ◽  
Author(s):  
R. B. Knapp
Keyword(s):  
Reference Frame ◽  
Peclet Number ◽  
Software Package ◽  
Reactive Transport ◽  
Quantitative Agreement ◽  
Stationary States ◽  
Good Quantitative Agreement ◽  
Analytical Results ◽  
Single Path ◽  
Aqueous Species

ABSTRACTA geochemical software package which models static, single-path kinetic water-rock interactions, EQ3/6, has been modified to incorporate successive-paths and stationary states under high Peclet number transport conditions in a Lagrangian reference frame. These modifications permit calculation of reactive transport with reasonable computational requirements. Results from the new option in EQ3/6 have been compared with analytical results for the simple HC1 - SiO2 system; excellent agreements were achieved. Results have also been compared with published results for a portion of the A12O3 - HCI - K2O - SiO2 system. The results are in good qualitative and, in some cases, good quantitative agreement. However, the values of some variables differ substantially; these differences can be attributed to use of a different set of Al and Si aqueous species.

Evolution of Matt Surface Topography in Aluminium Pack Rolling

2005 ◽  
Author(s):  
Hiroshi Utsunomiya ◽  
Michael P. F. Sutcliffe ◽  
Hugh R. Shercliff ◽  
Pete S. Bate ◽  
Dan B. Miller
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Surface Topography ◽  
Material Properties ◽  
Quantitative Agreement ◽  
Aluminium Foil ◽  
The Finite Element Method ◽  
Good Quantitative Agreement ◽  
Pack Rolling ◽  
Element Method

Roughening of the matt surface of pack rolled aluminium foil has been modelled. The model is based on the finite element method using isotropic plasticity. A distribution in material properties has been used to simulate the distribution of orientations through the material. The predictions of roughness show good quantitative agreement with the experiments.

scholarly journals π± Spectra in Au+Au Collisions at $\sqrt{s_{\rm NN}}=62.4\ {\rm GeV}$

2005 ◽  
Vol 20 (16) ◽  
pp. 3783-3785 ◽  
Author(s):  
◽  
Zhangbu Xu
Keyword(s):  
Transverse Momentum ◽  
Energy Loss ◽  
Ionization Energy ◽  
Time Projection Chamber ◽  
Time Of Flight ◽  
Particle Identification ◽  
Resistive Plate Chamber ◽  
Ionization Energy Loss ◽  
Charged Pions ◽  
Time Projection

The combination of the ionization energy loss (dE/dx) from Time Projection Chamber (TPC) at ≃ 8% resolution and multi-gap resistive plate chamber time-of-flight (TOF) at 85ps provides powerful particle identification. We present spectra of identified charged pions from transverse momentum pT≃0.2 GeV/c to 7-8 GeV/c in Au + Au collisions at [Formula: see text]. Physics implications will be discussed.

Kilovolt Electron Energy Loss Distribution in GaAsP

1984 ◽  
Vol 85 (1) ◽  
pp. 205-213 ◽  
Author(s):  
G. Oelgaet ◽  
U. Werner
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Loss Distribution ◽  
Electron Energy Loss
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