scholarly journals Dynamical generation of multiple focal spot pairs with controllable position and polarization

2020 ◽  
Vol 28 (18) ◽  
pp. 26706
Author(s):  
Yuxing Zhang ◽  
Jian Chen ◽  
Chunyan Bai ◽  
Dawei Zhang ◽  
Qiwen Zhan
Author(s):  
D. A. Carpenter ◽  
Ning Gao ◽  
G. J. Havrilla

A monolithic, polycapillary, x-ray optic was adapted to a laboratory-based x-ray microprobe to evaluate the potential of the optic for x-ray micro fluorescence analysis. The polycapillary was capable of collecting x-rays over a 6 degree angle from a point source and focusing them to a spot approximately 40 µm diameter. The high intensities expected from this capillary should be useful for determining and mapping minor to trace elements in materials. Fig. 1 shows a sketch of the capillary with important dimensions.The microprobe had previously been used with straight and with tapered monocapillaries. Alignment of the monocapillaries with the focal spot was accomplished by electromagnetically scanning the focal spot over the beveled anode. With the polycapillary it was also necessary to manually adjust the distance between the focal spot and the polycapillary.The focal distance and focal spot diameter of the polycapillary were determined from a series of edge scans.


2020 ◽  
Vol 78 (4) ◽  
pp. 479-486
Author(s):  
Marcela Tatiana Fernandes Beserra ◽  
◽  
Ricardo Tadeu Lopes ◽  
Davi Ferreira de Oliveira ◽  
Claudio Carvalho Conti ◽  
...  

2021 ◽  
Author(s):  
Xiao Wang ◽  
Robert D. MacDougall ◽  
Peng Chen ◽  
Charles A. Bouman ◽  
Simon K. Warfield

2012 ◽  
Vol 27 (26) ◽  
pp. 1250156 ◽  
Author(s):  
A. DOFF ◽  
A. A. NATALE

The gauge symmetry breaking in some versions of 3-3-1 models can be implemented dynamically because at the scale of a few TeVs the U(1)X coupling constant becomes strong. In this work, we consider the dynamical symmetry breaking in a minimal SU(3) TC × SU(3)L × U(1)X model, where we propose a new scheme to cancel the chiral anomalies, including two-index symmetric (6) technifermions, which incorporates naturally the walking behavior in the Technicolor (TC) sector. The composite scalar content of the model is minimal and all the symmetry breaking is implemented by a multiplet of technifermions. The choice of TC representations not only provides the anomaly cancelation with a walking behavior, but is crucial to promote the model's full dynamical symmetry breaking. We consider the dynamical generation of technigluon masses and, depending on the 3-3-1 symmetry breaking scale (μ331), we verify that the technigluon mass is strongly linked to the Z′ mass scale, for instance, if μ331 = 1 TeV , we have MZ′ > 1 TeV only if M TG < 350 GeV .


2015 ◽  
Vol 110 (1) ◽  
pp. 17004 ◽  
Author(s):  
A. Poudel ◽  
G. Ortiz ◽  
L. Viola

2002 ◽  
Vol 41 (Part 1, No. 11A) ◽  
pp. 6380-6385
Author(s):  
Hyeong Ryeol Oh ◽  
Dae-Gap Gweon ◽  
Jun-Hee Lee ◽  
Sang-Cheon Kim ◽  
See-Hyung Lee ◽  
...  

2003 ◽  
Author(s):  
Julien Fuchs ◽  
Benoit F. Wattellier ◽  
Ji P. Zou ◽  
Jean-Christophe Chanteloup ◽  
H. Bandulet ◽  
...  

Sign in / Sign up

Export Citation Format

Share Document