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Fabrication of one-cell vacuum system for Taiwan Photon Source

Published online by Cambridge University Press:  05 January 2011

C. L. Chen ,
C. C. Chang ,
C. K. Chan ,
C. M. Cheng ,
C. Y. Yang ,
L. H. Wu ,
H. P. Hsueh ,
C. K. Kuan ,
J. C. Syu  and
G. Y. Hsiung
...Show all authors
C. L. Chen*
Affiliation:
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
C. C. Chang
Affiliation:
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
C. K. Chan
Affiliation:
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
C. M. Cheng
Affiliation:
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
C. Y. Yang
Affiliation:
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
L. H. Wu
Affiliation:
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
H. P. Hsueh
Affiliation:
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
C. K. Kuan
Affiliation:
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
J. C. Syu
Affiliation:
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
G. Y. Hsiung
Affiliation:
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
J. R. Chen
Affiliation:
National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
*
†Email address for correspondence: clchen@nsrrc.org.tw
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Abstract

A vacuum system of 3 GeV Taiwan photon source (TPS, with circumference 518.4 m), is designed for low-outgassing aluminium beam ducts, low-impedance structure, oil-less pumping system and oil-less fabrication. A prototype (total length 14 m) of the TPS vacuum system has been fabricated. This one-cell prototype vacuum system consists of two bending-magnet chambers (~4 m long each), two straight chambers (~3 m long each), supporting stands, five beam positioning monitors and pumps. Two bending-magnet chambers were made by computer-numerical control machining, which was lubricated with ethanol to protect the surface from oil contamination. Next, these two bending chambers were cleaned with ozonated water to decrease the rate of thermal outgassing and photo-stimulated desorption. The rest chambers were also cleaned by chemical cleaning method. An automatic welding system then was used to implement the side-welding seams of bending chambers in a temperature- and humidity-controlled cleanroom. The bending and straight chambers were welded into one piece by ‘on-site welding’. After baking at 150°C for 24 h, an optimizing pressure could be achieved at 4.9 nPa.

Type
Poster paper
Information
Diamond Light Source Proceedings , Volume 1 , Issue MEDSI-6 , October 2010 , e50
Copyright
Copyright © Diamond Light Source Ltd 2010

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References

REFERENCES

Chen, J. R., Hsiung, G. Y., Chan, C. K., Yang, T. L., Kuan, C. K., Hsu, S. N., Chang, C. C., Yang, C. Y., Hsueh, H. P. & Chen, C. L. 2006 Vacuum system developments at the National Synchrotron Radiation Research Center – from the 1.5 GeV TLS to the 3.3 GeV TPS. J. Vacuum Soc. Jpn 49, 748–753.CrossRefGoogle Scholar
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