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quadrupole

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quadrupole
quadrupole, n. and a. Physics. (ˈkwɒdruːpəʊl) Also quadri-. [ad. Du. quadrupool: see quadru-, quadri-, and pole n.2] A. n. a. A multipole of order l = 2 (cf. multipole n.). Usu. attrib.1922 Proc. Sect. Sci. K. Akad. Wetensch. Amsterdam XXIII. 939 Assuming the molecules to act on each other as electr... Oxford English Dictionary
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Quadrupole
Gravitational quadrupole The mass quadrupole is analogous to the electric charge quadrupole, where the charge density is simply replaced by the mass density This gives it a nonzero quadrupole moment. wikipedia.org
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Quadrupole formula
the (mass) quadrupole moment. is the gravitational constant, the speed of light in vacuum, and is the mass quadrupole moment. wikipedia.org
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octupole
octupole Physics. (ˈɒktuːpəʊl) Also octa-, octo-. [f. octu- (in octuple a. (n.), octuplet: cf. quadrupole), octa-, octo- + pole n.2] A multipole of order l = 3. Freq. attrib. or as adj. Cf. multipole n.1929 P. Debye Polar Molecules ii. 26 The next configuration, constructed by a displacement of the ... Oxford English Dictionary
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Quadrupole magnet
If an F quadrupole and a D quadrupole are placed immediately next to each other, their fields completely cancel out (in accordance with Earnshaw's theorem where is the field gradient of the normal quadrupole component and is the field gradient of the skew quadrupole component. wikipedia.org
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Quadrupole splitting
Quadrupole splitting is an example of a hyperfine interaction found in gamma-ray spectroscopy, in the circumstance where nuclei with a non-radially-symmetric wikipedia.org
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Quadrupole mass analyzer
A mass-selecting quadrupole and collision quadrupole with time-of-flight device as the second mass selection stage is a hybrid known as a quadrupole time-of-flight the quadrupole field. wikipedia.org
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change order of integration Often when I do integrations I need to change the order of integration and this is time consuming. Consider for example \begin{align} \int_0^1\int_0^x f(x,r) \mbox{d}r\mbox{d}x=\int_0^1\int...
First write explicitly the integral domain: $$0\le x,r\le 1, 0\le \alpha\le r, 0\le \beta\le x.$$ For fixed $\alpha\in[0,1]$, we have $0\le\beta\le 1$. Then we have $\beta\le x\le 1$, and $\alpha\le r\le 1$. Hence, $$\int_0^1\int_0^1\int_0^r\int_0^xf(x,r,\alpha,\beta)\mbox{d}\beta \mbox{d}\alpha \mb...
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Quadrupole ion trap
See also Quadrupole magnet References Bibliography W. Ball, The rotating-saddle trap: a mechanical analogy to RF-electric-quadrupole ion trapping? wikipedia.org
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Steam Community :: Quadrupole
Steam Community :: Quadrupole ... 一万年太久，只争朝夕。
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Specifications of quadrupole mass spectrometer JB/T 9363-1999 - Chinese ...
Chinese National Standard Category: JB/T 9363-1999 Specifications of quadrupole mass spectrometer; Category No.: N53; Category Title: Electrochemical, thermochemistry and optical profile type analyzer
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Radio-frequency quadrupole
A radio-frequency quadrupole (RFQ) is a linear accelerator component generally used at low beam energies, roughly 2keV to 3MeV. It is similar in layout to a quadrupole mass analyser but its purpose is to accelerate a single-species beam (a beam of one particular type of particle wikipedia.org
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Quantum cylindrical quadrupole
It can be shown that the Schrödinger equation is solvable for a cylindrically symmetric electric quadrupole, thus indicating that the quadrupole term of This indicates that the quadrupole moment can be quantized in order of the Mathieu characteristic values and . wikipedia.org
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拓扑晶体绝缘体和高阶拓扑绝缘体有什么区别？
在一篇发表在Science的文章中，他们提出了一个简单的二维quadrupole insulator （电四极子绝缘体），并发现这个模型具有corner mode/charge（角态或者角荷）并可以被一个量子化的nested Wilson loop（也就是文中定义的quadrupole moment） （3）之前提过，quadrupole insulator本质上是一个boundary obstructed topological state。但如果在镜像对称性的基础上进一步引入四重旋转对称性（C4），quadrupole insulator就可以被视为一个OAI。 zhihu
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Triple quadrupole mass spectrometer
A triple quadrupole mass spectrometer (TQMS), is a tandem mass spectrometer consisting of two quadrupole mass analyzers in series, with a (non-mass-resolving Principle of operation Essentially the triple quadrupole mass spectrometer operates under the same principle as the single quadrupole mass analyzer. wikipedia.org
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