scholarly journals Precision measurement of the neutronβ-decay asymmetry

2013 ◽  
Vol 87 (3) ◽  
Author(s):  
M. P. Mendenhall ◽  
R. W. Pattie ◽  
Y. Bagdasarova ◽  
D. B. Berguno ◽  
L. J. Broussard ◽  
...  
Keyword(s):  
Precision Measurement ◽  
Decay Asymmetry

New Precision Measurement for Proton Zemach Radius with Laser Spectroscopy

2016 ◽  
Vol 40 ◽  
pp. 1660046 ◽  
Author(s):  
Y. Ma ◽  
K. Ishida ◽  
M. Iwasaki ◽  
Y. Matsuzaki ◽  
Y. Oishi ◽  
...  
Keyword(s):  
Ground State ◽  
Precision Measurement ◽  
Hyperfine Splitting ◽  
Wave Length ◽  
Muonic Hydrogen ◽  
Muon Decay ◽  
Circularly Polarized ◽  
Laser Wave ◽  
Splitting Energy ◽  
Decay Asymmetry

In this proceeding, a new proposal aiming to improve the precision of the proton Zemach radius will be presented. A circularly polarized laser will be shed on a sample of muonic hydrogen in its ground state. By observing the maximum muon decay asymmetry during scanning laser wave length, the ground-state hyperfine splitting energy can be identified, which is directly related to Zemach radius.citedupays The precision of Zemach radius by this measurement is estimated to be three times better compared to PSI experiment. This result will contribute to the solution of proton size puzzle.

High precision measurement of the SOS surface thickness in the rough phase

1991 ◽  
Vol 1 (12) ◽  
pp. 1669-1673 ◽  
Author(s):  
Hans Gerd Evertz ◽  
Martin Hasenbusch ◽  
Mihail Marcu ◽  
Klaus Pinn ◽  
Sorin Solomon
Keyword(s):  
High Precision ◽  
Precision Measurement ◽  
High Precision Measurement ◽  
Surface Thickness

INDALLOY 160-190

Alloy Digest ◽  
1984 ◽  
Vol 33 (1) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
Precision Measurement ◽  
Heat Treating ◽  
Spray Forming ◽  
Growth Behavior ◽  
Temperature Range

Abstract INDALLOY 160-190 is a bismth-base low-melting alloy that melts through th temperature range 160-190 F. It shrinks immediately upon solidification, grows back to zero in about one hour and then shows additional growth. This shrinkage-growth behavior makes it an ideal alloy for proof casting and precision measurement of internal dimensions. This alloy originally was developed for use by children for casting soldiers and other small objects. It performs best among the low-melting alloys for spraying in the spray forming of masks and molds and in metallizing. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on casting, heat treating, machining, and joining. Filing Code: Bi-34. Producer or source: Indium Corporation of America.

Ultrahigh-precision measurement timing jitter based on self-reference source

2020 ◽  
Vol 28 (11) ◽  
pp. 2429-2436
Author(s):  
Peng XU ◽  
◽  
Yuan-shan LIU ◽  
Jian-guo ZHANG ◽  
◽  
...  
Keyword(s):  
Precision Measurement ◽  
Timing Jitter ◽  
Reference Source ◽  
Self Reference

Precision Measurement of Supersonic Rocket Sled Velocity-Part II

1958 ◽  
Vol 28 (12) ◽  
pp. 809-816
Author(s):  
F. J. BEUTLER ◽  
L. L. RAUCH
Keyword(s):  
Precision Measurement

scholarly journals An Investigation of the Cutting Strategy for the Machining of Polar Microstructures Used in Ultra-Precision Machining Optical Precision Measurement

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 755
Author(s):  
Chen-Yang Zhao ◽  
Chi-Fai Cheung ◽  
Wen-Peng Fu
Keyword(s):  
Precision Measurement ◽  
Detection Algorithm ◽  
Surface Generation ◽  
Precision Machining ◽  
Tool Geometry ◽  
Depth Of Cut ◽  
Machining Parameters ◽  
Ultra Precision ◽  
Transition Points ◽  
Cutting Strategy

In this paper, an investigation of cutting strategy is presented for the optimization of machining parameters in the ultra-precision machining of polar microstructures, which are used for optical precision measurement. The critical machining parameters affecting the surface generation and surface quality in the machining of polar microstructures are studied. Hence, the critical ranges of machining parameters have been determined through a series of cutting simulations, as well as cutting experiments. First of all, the influence of field of view (FOV) is investigated. After that, theoretical modeling of polar microstructures is built to generate the simulated surface topography of polar microstructures. A feature point detection algorithm is built for image processing of polar microstructures. Hence, an experimental investigation of the influence of cutting tool geometry, depth of cut, and groove spacing of polar microstructures was conducted. There are transition points from which the patterns of surface generation of polar microstructures vary with the machining parameters. The optimization of machining parameters and determination of the optimized cutting strategy are undertaken in the ultra-precision machining of polar microstructures.

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