scholarly journals Tau mass measurement at BES-III

2019 ◽  
Vol 212 ◽  
pp. 08005
Author(s):  
M.N. Achasov ◽  
X.H. Mo ◽  
N.Yu. Muchnoi ◽  
I.B. Nikolaev ◽  
S.A. Privalov ◽  
...  
Keyword(s):  
Beam Energy ◽  
Measurement Accuracy ◽  
Mass Measurement ◽  
Threshold Region ◽  
Compton Backscattering ◽  
Backscattering Method ◽  
Integrated Luminosity

A scan of the threshold region of the process e+ e−→ τ+τ− with integrated luminosity about 140 pb−1 was performed with the BES-III detector at the BEPC-II collider in order to measure the τ-lepton mass. The beam energy was determined by the Compton backscattering method. To verify the measurement accuracy scans of the J/ψ and ψ′ resonances were performed.

Mass measurement accuracy of the Orbitrap in intact proteome analysis

2016 ◽  
Vol 30 (12) ◽  
pp. 1391-1397 ◽  
Author(s):  
Fan Yu ◽  
Houqin Fang ◽  
Kaijie Xiao ◽  
Yan Liu ◽  
Bingbing Xue ◽  
...  
Keyword(s):  
Measurement Accuracy ◽  
Mass Measurement ◽  
Proteome Analysis ◽  
Mass Measurement Accuracy

High Precision Mass Measurement in Automation

2010 ◽  
Vol 164 ◽  
pp. 19-24
Author(s):  
Tatjana Ivanova ◽  
Janis Rudzitis
Keyword(s):  
High Precision ◽  
Measurement Accuracy ◽  
Mass Measurement ◽  
Science And Technology ◽  
Computer Programs ◽  
Measurement Equipment ◽  
Measurement Instruments ◽  
Improve Measurement ◽  
Precision Mass Measurement ◽  
Reporting Procedures

High-precision mass measurement equipment is required in some areas of science and technology. Physics, chemistry, pharmaceutics and high precision mechanics are common examples. In metrology, high-precision scales are used for verification and calibration of lower precision mass measurement equipment (weights and scales). Mass comparators are the most accurate mass measurement instruments available today. It is a special type of electronic scales designed to compare mass of two weights. They can be automatic or manual, with various measurement ranges and accuracy classes. This article discusses principles of operation of mass comparators and practice of high-precision mass measurement. There are special computer programs that can be used in conjunction with these instruments, which may significantly improve measurement accuracy (when mass comparator is controlled remotely) as well as simplify calculations and reporting procedures. This article describes one of these programs – ScalesNet32 – which can be used with mass comparators produced by Sartorius (Germany).

Mass Measurement System Using an Undamped Dynamic Vibration Absorber for Weightless Conditions

2003 ◽  
Author(s):  
Takeshi Mizuno ◽  
Shinsuke Sato
Keyword(s):  
Measurement System ◽  
Measurement Accuracy ◽  
Mass Measurement ◽  
Inertial Mass ◽  
Vibration Absorber ◽  
Dynamic Vibration Absorber ◽  
Dynamic Vibration ◽  
System A ◽  
Measurement Object ◽  
Type Mass

A new vibration-type mass measurement system with an undamped dynamic vibration absorber was developed. In the developed system, a measurement object is attached to the inertial mass of the vibration generator instead of the absorber mass. It has an advantage that the tuning condition of the absorber is not influenced by the mass of measurement objects. The measurement accuracy of the developed system was estimated experimentally when it was fixed on a massive base and on a flexible structure. The results demonstrated that measurement accuracy was almost same in both the cases. It was also shown that the vibration of the table in transient states was reduced by increasing the excitation signal gradually from zero to an amplitude for measurement.

Sign in / Sign up

Export Citation Format

Share Document