Magnetoacoustic waves with effect of arbitrary degree of temperature and spin degeneracy in electron-positron-ion plasmas

2019 ◽  
Vol 60 (2) ◽  
pp. e201900087
Author(s):  
Safdar Ali ◽  
Mushtaq Ahmad ◽  
Muhammad Ikram
Keyword(s):  
Arbitrary Degree ◽  
Electron Positron ◽  
Magnetoacoustic Waves ◽  
Spin Degeneracy

scholarly journals Local gyrokinetic stability theory of plasmas of arbitrary degree of neutrality

2019 ◽  
Vol 85 (5) ◽  
Author(s):  
D. Kennedy ◽  
A. Mishchenko
Keyword(s):  
Temperature Gradient ◽  
Electric Fields ◽  
Doppler Shift ◽  
Local Limit ◽  
Complex Frequency ◽  
Line Geometry ◽  
Arbitrary Degree ◽  
Electron Plasmas ◽  
Electron Positron ◽  
Strong Electric Fields

Dipole and stellarator geometries are capable of confining plasmas of arbitrary neutrality, ranging from pure electron plasmas through to quasineutral. The diocotron mode is known to be important in non-neutral plasmas and has been widely studied. However, drift mode dynamics, dominating quasineutral plasmas, has received very little by way of attention in the non-neutral context. Here, we show that non-neutral plasmas can be unstable respect to both density-gradient- and temperature-gradient-driven instabilities. A local shearless slab limit is considered for simplicity. A key feature of non-neutral plasmas is the development of strong electric fields, in this local limit of straight field line geometry, the effect of the corresponding $\boldsymbol{E}\times \boldsymbol{B}$ drift is limited to the Doppler shift of the complex frequency $\unicode[STIX]{x1D714}\rightarrow \unicode[STIX]{x1D714}-\unicode[STIX]{x1D714}_{E}$ . However, the breaking of the quasineutrality condition still leads to interesting dynamics in non-neutral plasmas. In this paper we address the behaviour of a number of gyrokinetic modes in electron–ion and electron–positron plasmas with arbitrary degree of neutrality.

The physics potential of the electron-positron collider daφne

2001 ◽  
Vol 16 (1-2) ◽  
pp. 13-37
Author(s):  
Wolfgang Kluge
Keyword(s):  
Electron Positron ◽  
Physics Potential

A suggestion for investigating electron-muon and electron-pion scattering with electron-positron colliding beams

1974 ◽  
Vol 35 (C2) ◽  
pp. C2-124-C2-125
Author(s):  
C. CARIMALO ◽  
P. KESSLER ◽  
J. PARISI
Keyword(s):  
Pion Scattering ◽  
Electron Positron ◽  
Colliding Beams

Observation of Υ particles in colliding electron-positron beams

1979 ◽  
Vol 128 (8) ◽  
pp. 711
Author(s):  
Il'ya I. Roizen
Keyword(s):  
Electron Positron ◽  
Positron Beams

Major Upgrade of the Beijing Electron-Positron Collider

2009 ◽  
Vol 2009 (3) ◽  
pp. 275-281 ◽  
Author(s):  
Hesheng Chen ◽  
Chuang Zhang ◽  
Weiguo Li
Keyword(s):  
Electron Positron

scholarly journals Search for the rare semi-leptonic decay J/ψ → D−e+νe + c.c.

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
◽  
M. Ablikim ◽  
M. N. Achasov ◽  
P. Adlarson ◽  
S. Ahmed ◽  
...  
Keyword(s):  
Confidence Level ◽  
Branching Fraction ◽  
Center Of Mass ◽  
Leptonic Decay ◽  
Mass Energy ◽  
Center Of Mass Energy ◽  
Upper Limit ◽  
Electron Positron

Abstract Using 10.1 × 109J/ψ events produced by the Beijing Electron Positron Collider (BEPCII) at a center-of-mass energy $$ \sqrt{s} $$ s = 3.097 GeV and collected with the BESIII detector, we present a search for the rare semi-leptonic decay J/ψ → D−e+νe + c.c. No excess of signal above background is observed, and an upper limit on the branching fraction ℬ(J/ψ → D−e+νe + c. c.) < 7.1 × 10−8 is obtained at 90% confidence level. This is an improvement of more than two orders of magnitude over the previous best limit.

scholarly journals Vertical-longitudinal coupling induced by wakefields at the Cornell Electron-Positron Storage Ring Test Accelerator

2018 ◽  
Vol 21 (2) ◽  
Author(s):  
S. T. Wang ◽  
J. D. Perrin ◽  
S. Poprocki ◽  
W. Hartung ◽  
D. L. Rubin
Keyword(s):  
Storage Ring ◽  
Ring Test ◽  
Electron Positron

Cherenkov radiation of the fast magnetoacoustic waves in the non-uniform magnetospheric plasma

2021 ◽  
Vol 28 (2) ◽  
pp. 022901
Author(s):  
Dmitri Yu. Klimushkin ◽  
Pavel N. Mager
Keyword(s):  
Cherenkov Radiation ◽  
Magnetospheric Plasma ◽  
Magnetoacoustic Waves
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