Comment on an Inelastic Collision Service

1970 ◽  
Vol 38 (12) ◽  
pp. 1490-1490
Author(s):  
Charles Jacobs
Keyword(s):  
Inelastic Collision

Inelastic Collision Processes of Methane and Ethane Molecules at a Pt(111) Surface Studied by Molecular Beam Scattering Techniques

1999 ◽  
Vol 38 (Part 1, No. 12A) ◽  
pp. 6910-6914 ◽  
Author(s):  
Shinjiro Yagyu ◽  
Yasunobu Kino ◽  
Toshiyuki Ikeuchi ◽  
Tomomi Hiraoka ◽  
Takahiro Kondo ◽  
...  
Keyword(s):  
Molecular Beam ◽  
Inelastic Collision ◽  
Molecular Beam Scattering ◽  
Beam Scattering ◽  
Collision Processes

Generation of extra and very low-frequency (ELF/VLF) radiation by ionospheric electrojet modulation using high-frequency (HF) heating waves

2002 ◽  
Vol 68 (4) ◽  
pp. 267-284 ◽  
Author(s):  
S. P. KUO
Keyword(s):  
High Frequency ◽  
Thermal Instability ◽  
Loss Rate ◽  
Inelastic Collision ◽  
Modulation Frequency ◽  
Low Frequency ◽  
Heating Power ◽  
Very Low Frequency ◽  
Hf Heating ◽  
Heating Wave

Extra and very low-frequency (ELF/VLF) wave generation by modulated polar electrojet currents is studied numerically. Through Ohmic heating by the amplitude-modulated high-frequency heating wave, the conductivity and thus the current of the electrojet are modulated accordingly to set up the ionospheric antenna current. Stimulated thermal instability, which can further enhance the electrojet current modulation, is studied. It is first analysed analytically to determine the threshold heating power for its excitation. The nonlinear evolutions of the generated ELF/VLF waves enhanced by the instability are then studied numerically. Their spectra are also evaluated. The field intensity of the emission at the fundamental modulation frequency is found to increase with the modulation frequency in agreement with the Tromso observations. The efficiency enhancement by the stimulated thermal instability is hampered by inelastic collisions of electrons with neutral particles (mainly due to vibration excitation of N2), which cause this instability to saturate at low levels. However, the electron inelastic collision loss rate drops rapidly to a low value in the energy regime from 3.5 to 6 eV. As the heating power exceeds a threshold level, significant electron heating enhanced by the instability is shown, which indeed causes a steep drop in the electron inelastic collision loss rate. Consequently, this instability saturates at a much higher level, resulting to a near step increase (of about 10–13 dB depending on the modulation wave form) in the spectral intensity of ELF radiation. The dependence of the threshold power of the HF heating wave on the modulation frequency is determined.

scholarly journals The core software framework for the LHCb Upgrade

2019 ◽  
Vol 214 ◽  
pp. 05040
Author(s):  
Concezio Bozzi ◽  
Sébastien Ponce ◽  
Stefan Roiser
Keyword(s):  
Critical Points ◽  
Inelastic Collision ◽  
Current Status ◽  
Software Framework ◽  
Collision Rate ◽  
Proton Proton ◽  
Work Program ◽  
The Core ◽  
Lhcb Detector ◽  
Many Core

The LHCb detector will be upgraded for the LHC Run 3. The new, full software trigger must be able to sustain the 30MHz proton-proton inelastic collision rate. The Gaudi framework currently used in LHCb has been re-engineered in order to enable the efficient usage of vector registers and of multi-and many-core architectures. This contribution presents the critical points that had to be tackled, the current status of the core software framework and an outlook of the work program that will address the challenges of the software trigger.

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