IPAC2013 - List of Authors (Huang, Y.T.)

Paper	Title	Page
MOPWA043	The HV Withstands Test for In Vacuum Booster Kicker	765
	Y.-H. Liu, C.K. Chan, C.S. Chen, H.H. Chen, J.-R. Chen, K.H. Hsu, H.P. Hsueh, Y.T. Huang, C.S. Yang NSRRC, Hsinchu, Taiwan
	The maximum driving voltage of TPS booster extraction kicker is close to 30 kV, the HV insulation should be carefully noticed. A DC withstand voltage tester MUSASHI 3802 (Model: IP-701G) is used to test the DC breakdown voltage, which the maximum driving voltage is 37 kV. The 10 mm gap between coil and ferrite is designed in order to increase HV break down voltage. The safety breakdown distance between HV coil and grounding plate was tested in air. Different insulation material with different thickness was tested the breakdown voltage. Thicker than 10 mm ceramic plate could effectively avoid the breakdown occurred with 37 kV DC charging. Thus HV withstand voltage will be higher in vacuum chamber and the insulation with HV will not be the problem.

THPFI071	Baking Tests and Results of A1050 Diamond Edge Gasket	3463
	Y.T. Huang, C.-C. Chang, J.-R. Chen, G.-Y. Hsiung, S-N. Hsu, H.P. Hsueh NSRRC, Hsinchu, Taiwan J.-R. Chen National Tsing Hua University, Hsinchu, Taiwan
	A1050 is a common and soft material, widely used in everyday life. It is machinable and cheap, which makes it a candidate for a gasket material. In the case of sealing between disparate materials, treating the thermal expansion when the gasket suffers from baking is difficult. The clearance and the eccentricity between the gasket and the flange are also important; most leaks occur about 80 ~ 110 oC. The experimental apparatus comprised a vacuum chamber with six diamond-edge gaskets assembled, a turbo-molecular pump and an extractor gauge. The pre-baking torque for this gasket is 70 – 80 kg cm; the rates of both heating and cooling are less than 40 oC per hour. The gaskets are baked repeatedly under the same conditions excluding the target temperature set for baking. A1050 diamond gaskets work well after baking at 120 ~ 140 oC; at temperature 170 ~ 180 oC, leaks sometimes appear on cooling. This paper presents the baking results of A1050 diamond-edge gasket and explains the cause of leaking after baking above 150 oC.

THPFI077	Construction Status of the TPS Vacuum Systems	3472
	G.-Y. Hsiung, C.K. Chan, C.H. Chang, C.-C. Chang, S.W. Chang, Y.P. Chang, C.L. Chen, J.-R. Chen, Z.W. Chen, C.M. Cheng, Y.T. Cheng, S-N. Hsu, H.P. Hsueh, C.S. Huang, Y.T. Huang, T.Y. Lee, L.H. Wu, Y.C. Yang NSRRC, Hsinchu, Taiwan J.-R. Chen National Tsing Hua University, Hsinchu, Taiwan
	The vacuum systems for the 3 GeV Taiwan Photon Source (TPS) have been constructed since 2010. Most of the vacuum components and equipments have been manufactured and delivered. For the electron storage ring (SR), all the 24 cells of 14 m aluminum vacuum systems have been welded and assembled. The vacuum baking for the cells in the laboratory was undergoing to achieve the ultrahigh vacuum pressure below 1×10^-8 Pa. The vacuum systems accommodated with the insertion devices in the long straight sections have been designed and under manufacturing. For the booster (BR), all the stainless steel chambers including the 0.7 mm elliptical chambers, BPM ducts, and the pumping chambers, have been manufactured. The two transport lines: LTB for Linac to BR and BTS for BR to SR were manufactured. Vacuum chambers for BTS adopt the similar chambers for BR but will be baked to ultrahigh vacuum for connecting with SR without injection window. The beam ducts for LTB will be made of aluminum alloys. The construction works for TPS vacuum systems will be completed before April of 2013 while the installation of the systems in the TPS tunnel will be started immediately.

Paper

Title

Page

The HV Withstands Test for In Vacuum Booster Kicker

765

Y.-H. Liu, C.K. Chan, C.S. Chen, H.H. Chen, J.-R. Chen, K.H. Hsu, H.P. Hsueh, Y.T. Huang, C.S. Yang
NSRRC, Hsinchu, Taiwan

The maximum driving voltage of TPS booster extraction kicker is close to 30 kV, the HV insulation should be carefully noticed. A DC withstand voltage tester MUSASHI 3802 (Model: IP-701G) is used to test the DC breakdown voltage, which the maximum driving voltage is 37 kV. The 10 mm gap between coil and ferrite is designed in order to increase HV break down voltage. The safety breakdown distance between HV coil and grounding plate was tested in air. Different insulation material with different thickness was tested the breakdown voltage. Thicker than 10 mm ceramic plate could effectively avoid the breakdown occurred with 37 kV DC charging. Thus HV withstand voltage will be higher in vacuum chamber and the insulation with HV will not be the problem.

THPFI071

Baking Tests and Results of A1050 Diamond Edge Gasket

3463

Y.T. Huang, C.-C. Chang, J.-R. Chen, G.-Y. Hsiung, S-N. Hsu, H.P. Hsueh
NSRRC, Hsinchu, Taiwan
J.-R. Chen
National Tsing Hua University, Hsinchu, Taiwan

A1050 is a common and soft material, widely used in everyday life. It is machinable and cheap, which makes it a candidate for a gasket material. In the case of sealing between disparate materials, treating the thermal expansion when the gasket suffers from baking is difficult. The clearance and the eccentricity between the gasket and the flange are also important; most leaks occur about 80 ~ 110 oC. The experimental apparatus comprised a vacuum chamber with six diamond-edge gaskets assembled, a turbo-molecular pump and an extractor gauge. The pre-baking torque for this gasket is 70 – 80 kg cm; the rates of both heating and cooling are less than 40 oC per hour. The gaskets are baked repeatedly under the same conditions excluding the target temperature set for baking. A1050 diamond gaskets work well after baking at 120 ~ 140 oC; at temperature 170 ~ 180 oC, leaks sometimes appear on cooling. This paper presents the baking results of A1050 diamond-edge gasket and explains the cause of leaking after baking above 150 oC.

THPFI077

Construction Status of the TPS Vacuum Systems

3472

G.-Y. Hsiung, C.K. Chan, C.H. Chang, C.-C. Chang, S.W. Chang, Y.P. Chang, C.L. Chen, J.-R. Chen, Z.W. Chen, C.M. Cheng, Y.T. Cheng, S-N. Hsu, H.P. Hsueh, C.S. Huang, Y.T. Huang, T.Y. Lee, L.H. Wu, Y.C. Yang
NSRRC, Hsinchu, Taiwan
J.-R. Chen
National Tsing Hua University, Hsinchu, Taiwan

The vacuum systems for the 3 GeV Taiwan Photon Source (TPS) have been constructed since 2010. Most of the vacuum components and equipments have been manufactured and delivered. For the electron storage ring (SR), all the 24 cells of 14 m aluminum vacuum systems have been welded and assembled. The vacuum baking for the cells in the laboratory was undergoing to achieve the ultrahigh vacuum pressure below 1×10^-8 Pa. The vacuum systems accommodated with the insertion devices in the long straight sections have been designed and under manufacturing. For the booster (BR), all the stainless steel chambers including the 0.7 mm elliptical chambers, BPM ducts, and the pumping chambers, have been manufactured. The two transport lines: LTB for Linac to BR and BTS for BR to SR were manufactured. Vacuum chambers for BTS adopt the similar chambers for BR but will be baked to ultrahigh vacuum for connecting with SR without injection window. The beam ducts for LTB will be made of aluminum alloys. The construction works for TPS vacuum systems will be completed before April of 2013 while the installation of the systems in the TPS tunnel will be started immediately.