All‐aluminum‐alloy ultrahigh vacuum system for a large‐scale electron–positron collider

1984 ◽  
Vol 2 (2) ◽  
pp. 1170-1175 ◽  
Author(s):  
Hajime Ishimaru
Keyword(s):  
Aluminum Alloy ◽  
Large Scale ◽  
Ultrahigh Vacuum ◽  
Vacuum System ◽  
Electron Positron

Summary Abstract: All aluminum alloy ultrahigh vacuum system for a 30 GeV electron–positron collider

1986 ◽  
Vol 4 (3) ◽  
pp. 1762-1764 ◽  
Author(s):  
H. Ishimaru ◽  
T. Momose ◽  
K. Narushima ◽  
H. Mizuno ◽  
K. Kanazawa ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Ultrahigh Vacuum ◽  
Vacuum System ◽  
Electron Positron

Aluminum alloy ultrahigh vacuum system for molecular beam epitaxy

1986 ◽  
Vol 4 (6) ◽  
pp. 2515-2519 ◽  
Author(s):  
M. Miyamoto ◽  
Y. Sumi ◽  
S. Komaki ◽  
K. Narushima ◽  
H. Ishimaru
Keyword(s):  
Aluminum Alloy ◽  
Molecular Beam Epitaxy ◽  
Molecular Beam ◽  
Ultrahigh Vacuum ◽  
Vacuum System

An all-metal bakeable ultrahigh vacuum system for nucleation studies

Vacuum ◽  
1968 ◽  
Vol 18 (12) ◽  
pp. 641-644 ◽  
Author(s):  
JL Robins ◽  
VNE Robinson
Keyword(s):  
Ultrahigh Vacuum ◽  
Vacuum System

Foundry Technique Designing of the Large Scale Thin-Section Casting

2011 ◽  
Vol 121-126 ◽  
pp. 325-329
Author(s):  
Bin Feng He
Keyword(s):  
Numerical Simulation ◽  
Aluminum Alloy ◽  
Thin Section ◽  
Large Scale ◽  
Liquid Fraction ◽  
Simulation Software ◽  
Pressure Casting ◽  
Counter Pressure ◽  
Shrinkage Defects ◽  
Filling And Solidification

The FDM numerical simulation software View Cast system was employed to the counter-pressure casting of aluminum alloy large-scale thin-section casting. By analyzing the mold filling and solidification, the distribution of liquid fraction, temperature field were studied. The potential shrinkage defects were predicted to be formed at the top of the casting. A solution towards reducing such defects has been presented. The feeding capacity of the riser was improved. Analysis on the shrinkage proved that the improved riser is an effective method for reduction of defects.

scholarly journals Indirect effects of dark matter

2019 ◽  
Vol 28 (13) ◽  
pp. 1941011 ◽  
Author(s):  
K. M. Belotsky ◽  
E. A. Esipova ◽  
A. Kh. Kamaletdinov ◽  
E. S. Shlepkina ◽  
M. L. Solovyov
Keyword(s):  
Dark Matter ◽  
Indirect Effects ◽  
Large Scale ◽  
Gamma Ray ◽  
Space Distribution ◽  
Stable Form ◽  
Final State ◽  
Electron Positron ◽  
Text Mode ◽  
The Universe

Here, we briefly review possible indirect effects of dark matter (DM) of the universe. It includes effects in cosmic rays (CR): first of all, the positron excess at [Formula: see text]500[Formula: see text]GeV and possible electron–positron excess at 1–1.5[Formula: see text]TeV. We tell that the main and least model-dependent constraint on such possible interpretation of CR effects goes from gamma-ray background. Even ordinary [Formula: see text] mode of DM decay or annihilation produces prompt photons (FSR) so much that it leads to contradiction with data on cosmic gamma-rays. We present our attempts to possibly avoid gamma-ray constraint. They concern with peculiarities of both space distribution of DM and their physics. The latter involves complications of decay/annihilation modes of DM, modifications of Lagrangian of DM-ordinary matter interaction and inclusion of mode with identical fermions in final state. In this way, no possibilities to suppress were found except, possibly, the mode with identical fermions. While the case of spatial distribution variation allows achieving consistency between different data. Also, we consider stable form of DM which can interact with baryons. We show which constraint such DM candidate can get from the damping effect in plasma during large-scale structure (LSS) formation in comparison with other existing constraints.

New All Aluminum Alloy Vacuum System for the TRISTAN e+e- Storage Accelerator

1981 ◽  
Vol 28 (3) ◽  
pp. 3320-3322 ◽  
Author(s):  
Hajime Ishimaru ◽  
Gen'ichi Horikoshi ◽  
Yoshitaka Kimura
Keyword(s):  
Aluminum Alloy ◽  
Vacuum System

Ultrahigh vacuum system

Vacuum ◽  
1968 ◽  
Vol 18 (4) ◽  
pp. 232-232
Author(s):  
VARIANASSOCIATESVACUUMDIVISIO
Keyword(s):  
Ultrahigh Vacuum ◽  
Vacuum System
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