ICALEPCS2013 - List of Keywords (focusing)

Paper	Title	Other Keywords	Page
TUPPC058	Automation of Microbeam Focusing for X-Ray Micro-Experiments at the 4B Beamline of Pohang Light Source-II	controls, experiment, LabView, hardware	703
	K.H. Gil, H. J. Choi, J.Y. Huang, J.H. Lim PAL, Pohang, Kyungbuk, Republic of Korea C.W. Bark Gachon University, Seongnam, Republic of Korea
	The 4B beamline of the Pohang Light Source-II performs X-ray microdiffraction and microfluorescence experiments using X-ray microbeams. The microbeam has been focused down to FWHM sizes of less than 3 μm by manually adjusting the vertical and horizontal focusing mirrors of a K-B (Kirkpatrick-Baez) mirror system. In this research, a microbeam-focusing automation software was developed to automate the old complex and cumbersome process of beam focusing which may take about a day. The existing controllers of the K-B mirror system were replaced by products with communication functions and a motor-driving routine by means of proportional feedback control was constructed. Based on the routine and the outputs of two ionization chambers arranged in front and rear of the K-B mirror system, the automation software to perform every step of the beam focusing process was completed as LabVIEW applications. The developed automation software was applied to the 4B beamline and showed the performance of focusing an X-ray beam with a minimal size within an hour. This presentation introduces the details of the algorithms of the automation software and examines its performances.
	Poster TUPPC058 [1.257 MB]

Paper

Title

Other Keywords

Page

TUPPC058

Automation of Microbeam Focusing for X-Ray Micro-Experiments at the 4B Beamline of Pohang Light Source-II

controls, experiment, LabView, hardware

703

K.H. Gil, H. J. Choi, J.Y. Huang, J.H. Lim
PAL, Pohang, Kyungbuk, Republic of Korea
C.W. Bark
Gachon University, Seongnam, Republic of Korea

The 4B beamline of the Pohang Light Source-II performs X-ray microdiffraction and microfluorescence experiments using X-ray microbeams. The microbeam has been focused down to FWHM sizes of less than 3 μm by manually adjusting the vertical and horizontal focusing mirrors of a K-B (Kirkpatrick-Baez) mirror system. In this research, a microbeam-focusing automation software was developed to automate the old complex and cumbersome process of beam focusing which may take about a day. The existing controllers of the K-B mirror system were replaced by products with communication functions and a motor-driving routine by means of proportional feedback control was constructed. Based on the routine and the outputs of two ionization chambers arranged in front and rear of the K-B mirror system, the automation software to perform every step of the beam focusing process was completed as LabVIEW applications. The developed automation software was applied to the 4B beamline and showed the performance of focusing an X-ray beam with a minimal size within an hour. This presentation introduces the details of the algorithms of the automation software and examines its performances.

Poster TUPPC058 [1.257 MB]