scholarly journals LIMITATIONS IMPOSED BY BEAM–BEAM EFFECTS AND THEIR REMEDIES – II

2000 ◽  
Vol 15 (16) ◽  
pp. 2543-2554 ◽  
Author(s):  
J. E. SPENCER
Keyword(s):  
Linear Collider ◽  
Charge Compensation ◽  
General Purpose ◽  
Low Energy ◽  
High Luminosity ◽  
Aspect Ratios ◽  
Previous Round ◽  
Flat Beam

Effects that limit the luminosities of a general purpose linear collider (GLC) capable of [Formula: see text] and [Formula: see text] channels are discussed together with mitigations. Previous results are extended to understand the differences between channels to maximize the generalized luminosity. A standard NLC configuration at [Formula: see text] is used for comparison. Without charge compensation or bunch shaping, such flat beam configurations (aspect ratios R*≫1) imply major disadvantages for e-e- due to the strong disruption (D) and small, longitudinal f-numbers [Formula: see text] that are imposed. Previous round and flat beam configurations are studied as functions of D (or fb#), fl# and the constraints ΔB, Nγ and ϒ. Round beams with decreased disruptions and larger fl-stops are preferred with tensor beams, charge compensation or other bunch manipulation schemes. A low energy, high luminosity prototype is again proposed based on the possible physics.

scholarly journals BILEPTON RESONANCE IN ELECTRON–ELECTRON SCATTERING

2000 ◽  
Vol 15 (16) ◽  
pp. 2455-2460
Author(s):  
PAUL H. FRAMPTON
Keyword(s):  
Electron Scattering ◽  
Linear Collider ◽  
Theoretical Background ◽  
Muon Decay ◽  
Low Energy ◽  
High Luminosity ◽  
Gauge Bosons

Theoretical background for bileptonic gauge bosons is reviewed — both the SU(15) GUT model and the 3-3-1 model. Mass limits on bileptons are discussed coming from e+e- scattering, polarized muon decay and muonium–antimuonium conversion. Discovery in e-e- at a linear collider at low energy (100 GeV) and high luminosity (1033/cm2/s) is emphasized.

STRONGLY INTERACTING W BOSONS AT e-e- COLLIDERS

2000 ◽  
Vol 15 (16) ◽  
pp. 2387-2396
Author(s):  
WOLFGANG KILIAN
Keyword(s):  
Higgs Boson ◽  
Elastic Scattering ◽  
Scattering Amplitudes ◽  
Linear Collider ◽  
W Bosons ◽  
Low Energy ◽  
High Luminosity ◽  
Massive Vector ◽  
Quasi Elastic Scattering ◽  
Vector Bosons

If no Higgs boson exists, scattering amplitudes of massive vector bosons become strong at TeV energies. Below the threshold where new resonances appear, they are described by an effective chiral Lagrangian, which introduces a small number of new universal parameters at each order of a low-energy expansion. These parameters can be measured in (quasi-)elastic scattering processes of massive vector bosons in e-e± collisions. Analyzing processes such as e-e-→νeνeW-W-, a sensitivity of the order 10-2 can be reached at a high-luminosity 1 TeV linear collider.

scholarly journals LIMITATIONS IMPOSED BY BEAM-BEAM EFFECTS AND THEIR REMEDIES

1998 ◽  
Vol 13 (14) ◽  
pp. 2479-2492 ◽  
Author(s):  
J. E. SPENCER
Keyword(s):  
Linear Collider ◽  
Power Conversion ◽  
Charge Compensation ◽  
General Purpose ◽  
Design Constraints ◽  
Linear Colliders ◽  
The Cost ◽  
Conversion Efficiencies ◽  
Integrated Luminosity

Effects that limit the luminosities of a general purpose linear collider or GLC capable of [Formula: see text], [Formula: see text] and [Formula: see text] incident channels are discussed together with potential mitigations. The relative characteristics of such channels and their luminosities are predicted based on differing assumptions – including those for the current configurations for the NLC at [Formula: see text] and 1.0 TeV. Disadvantages related to the increased complexity of linear colliders can be offset by broader design constraints that seek to optimize the generalized luminosity. Decreased disruptions and bunch charges are effective and can be used in combination with feasable charge compensation schemes to predict higher luminosities and power conversion efficiencies. The incremental costs of additional channels is modest compared to the cost of any one by itself or potential gains in the integrated luminosity.

scholarly journals REVIEW OF THE PHENOMENOLOGY OF NONCOMMUTATIVE GEOMETRY

2004 ◽  
Vol 19 (02) ◽  
pp. 179-204 ◽  
Author(s):  
I. HINCHLIFFE ◽  
N. KERSTING ◽  
Y. L. MA
Keyword(s):  
Electric Dipole ◽  
Particle Physics ◽  
Extra Dimensions ◽  
Linear Collider ◽  
Dipole Moments ◽  
High Energy ◽  
Low Energy ◽  
Electric Dipole Moments ◽  
The Status ◽  
High Energy Scattering

We present a pedagogical review of particle physics models that are based on the noncommutativity of space–time, [Formula: see text], with specific attention to the phenomenology these models predict in particle experiments either in existence or under development. We summarize results obtained for high energy scattering such as would occur, for example, in a future e+e-linear collider with [Formula: see text], as well as low energy experiments such as those pertaining to elementary electric dipole moments and other CP violating observables, and finally comment on the status of phenomenological work in cosmology and extra dimensions.

Transport of intense ion beams and space charge compensation issues in low energy beam lines (invited)

2012 ◽  
Vol 83 (2) ◽  
pp. 02B320 ◽  
Author(s):  
N. Chauvin ◽  
O. Delferrière ◽  
R. Duperrier ◽  
R. Gobin ◽  
P. A. P. Nghiem ◽  
...  
Keyword(s):  
Space Charge ◽  
Charge Compensation ◽  
Ion Beams ◽  
Low Energy ◽  
Energy Beam

Space charge compensation of low energy ion beam

2002 ◽  
Vol 73 (2) ◽  
pp. 995-997 ◽  
Author(s):  
V. Dudnikov ◽  
A. Dudnikov
Keyword(s):  
Space Charge ◽  
Ion Beam ◽  
Charge Compensation ◽  
Low Energy

scholarly journals Peripheral Isothermal System of Heat Gain Storage for Thermal Stability in Low-Energy Buildings

2019 ◽  
Vol 9 (15) ◽  
pp. 3091 ◽  
Author(s):  
Arkadiusz Węglarz ◽  
Michał Pierzchalski ◽  
Dariusz Heim
Keyword(s):  
Energy Demand ◽  
Heat Storage ◽  
Ventilation System ◽  
General Purpose ◽  
Low Energy ◽  
Thermal Mass ◽  
Airflow Rate ◽  
Latent Heat Storage ◽  
Energy Effect ◽  
Heat Gain

The problem of heat storage in low- or ultra-low-energy houses is becoming a crucial issue. The general purpose of this study was to determine the potential for utilising heat gain recovery in a building. The proposed solution is based on an auxiliary latent heat storage tank using paraffin RT24. The tank is connected to an integrated heat recovery system that supplies heat from the internal loop of a mechanical ventilation system. The storage capacity of the tank was determined using the proposed parameter “excess of heat gains” of the thermal zone, and was obtained by measurement. The detailed construction of the tank, the phase change material properties and the quantity were proposed. The data that was collected allowed for the calculation of the temporary charging level as well as the overall seasonal energy stored in the tank. It was shown that during the heating season, the temperature could rise above the set-up value of 20 °C by as much as 8 K at maximum. Although the analysed building was characterised by heavy construction and high thermal mass, the additional heat could be effectively stored and utilised to cover the energy demand of the zone at the level of 88 MJ/a and 208 MJ/a, depending on the airflow rate between the rooms and the heat exchanger, for 140 and 420 m3/h, respectively. The expected energy effect for a low thermal mass construction, e.g., a timber frame was much higher and the results obtained by using the numerical simulation were 116 MJ/a for 140 m3/h, and 273 MJ/a for 420 m3/h, respectively.

Sign in / Sign up

Export Citation Format

Share Document