IPAC2014 - List of Authors (Wang, H.J.)

Paper	Title	Page
MOOCA03	Design of High-power Graphene Beam Window	45
	H.J. Wang, H.T. Jing, H. Qu, J.Y. Tang IHEP, Beijing, People's Republic of China
	Beam window is a key device in high-intensity hadron beam applications, and it is usually used to separate air or other gas environments in the end of beam vacuum duct. Compared with the usually-used window materials such as Inconel alloy, Aluminum alloy and so on, the graphene has extremely high thermal conductivity, high strength and high transparency to high-energy ions. With the maturation of large-size graphene manufacturing technology, we have studied this new-type window for MW-class proton beam. The thermal analyses by the theoretical formula and simulations based on FEA are presented in this paper. Simultaneously, the scattering effect and the lifetime are also discussed. The preliminary results are promising. The same material can also be possibly applied to other devices such as charge-exchange stripping foils, beam monitors and so on.
	Slides MOOCA03 [1.467 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOOCA03
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MOPRI090	Beam Distribution Transformation with SFMs at 3MeV C-ADS Beamline	824
	H. Geng, P. Cheng, C. Meng, S. Pei, B. Sun, H.J. Wang, B. Xu, F. Yan, Y.L. Zhao IHEP, Beijing, People's Republic of China
	The C-ADS project is building a test facility at the Institute of High Energy Physics. The design goal of the test facility is 10MeV beam energy with a continuous beam current of 10mA. To sustain the 100kW CW beam power at the beam dump, a beam distribution transform system is designed. The Step Field Magnets (SFMs) are used to transform the beam distribution from Gaussian to uniform. In this test stand, two sets of SFMs will be employed to manipulate the beam distribution. At the first commissioning stage, the bump dump line will be connected to the Medium Energy Beam Transport-1 (MEBT1) to test the beam manipulation scheme. The design and error analysis of this 3MeV beam dump line will be discussed in this paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI090
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TUPRO096	Field Measurement of the Quadrupole Magnet for CSNS/RCS	1265
	L. Li, C.D. Deng, W. Kang, S. Li, D. Tang, H.J. Wang, B. Yin, Z. Zhang, J.X. Zhou IHEP, Beijing, People's Republic of China
	The quadrupole magnets are being manufactured and measured for China Spoliation Neutron Source Rapid Cycling Synchrotron (CSNS/RCS) since 2012. In order to evaluate the magnet qualities, a dedicated magnetic measurement system has been developed. The main quadrupole magnets have been excited with DC current biased 25Hz repetition rate. The measurement of magnetic field was mainly based on integral field and harmonics measurements at both static and dynamic conditions. This paper describes the magnet design, the field measurement system and presents the results of the quadrupole magnet.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO096
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THPME138	Dynamic Comparison With XAL and Tracewin Based on the Injector-I of China ADS Test Stand	3572
	Y.L. Zhao, P. Cheng, H. Geng, C. Meng, S. Pei, B. Sun, H.J. Wang, B. Xu, F. Yan IHEP, Beijing, People's Republic of China
	The injector scheme I (injector-I) of China ADS test stand is a superconducting Linac which accelerates 10mA beam to 3.2MeV, 5MeV, 10MeV, and then transports it to the dump. The dump line is designed to meet the requirement of beam expansion at the three different energies. The XAL from SNS was selected for the commissioning of China ADS. Because the beam current is so high, the nonlinear space charge force cannot be omitted. As we know, XAL calculates the space charge force with linear resolver. So, whether it could display the beam exactly enough is an important issue to consider. As a preparation for beam commissioning, the virtual accelerator in XAL frame was built and tested. Here in this paper, the envelopes of the 5MeV and 10MeV lattices from general XAL mpx application are shown and compared with the multiparticle tracking code TraceWin.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME138
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THPME139	Emittance Measurement with Wire Scanners at CADS MEBT1	3575
	H. Geng, P. Cheng, C. Meng, S. Pei, B. Sun, H.J. Wang, B. Xu, F. Yan, Y.L. Zhao IHEP, Beijing, People's Republic of China
	The C-ADS project has started beam commissioning. The ion source and LEBT has been commissioned successfully, while the RFQ is under conditioning. The Medium Energy Beam Transport line-1 (MEBT) is the place where extensive beam parameter measurement will be carried out. Beam emittance is one of the most critical parameters which have to characterized. In the C-ADS injector-I, the MEBT-1 has installed three wire scanners to measure the beam sizes. The transverse emittance measurement method using the wire scanners will be discussed in detail in this paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME139
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Paper

Title

Page

Design of High-power Graphene Beam Window

45

H.J. Wang, H.T. Jing, H. Qu, J.Y. Tang
IHEP, Beijing, People's Republic of China

Beam window is a key device in high-intensity hadron beam applications, and it is usually used to separate air or other gas environments in the end of beam vacuum duct. Compared with the usually-used window materials such as Inconel alloy, Aluminum alloy and so on, the graphene has extremely high thermal conductivity, high strength and high transparency to high-energy ions. With the maturation of large-size graphene manufacturing technology, we have studied this new-type window for MW-class proton beam. The thermal analyses by the theoretical formula and simulations based on FEA are presented in this paper. Simultaneously, the scattering effect and the lifetime are also discussed. The preliminary results are promising. The same material can also be possibly applied to other devices such as charge-exchange stripping foils, beam monitors and so on.

Slides MOOCA03 [1.467 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOOCA03

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPRI090

Beam Distribution Transformation with SFMs at 3MeV C-ADS Beamline

824

H. Geng, P. Cheng, C. Meng, S. Pei, B. Sun, H.J. Wang, B. Xu, F. Yan, Y.L. Zhao
IHEP, Beijing, People's Republic of China

The C-ADS project is building a test facility at the Institute of High Energy Physics. The design goal of the test facility is 10MeV beam energy with a continuous beam current of 10mA. To sustain the 100kW CW beam power at the beam dump, a beam distribution transform system is designed. The Step Field Magnets (SFMs) are used to transform the beam distribution from Gaussian to uniform. In this test stand, two sets of SFMs will be employed to manipulate the beam distribution. At the first commissioning stage, the bump dump line will be connected to the Medium Energy Beam Transport-1 (MEBT1) to test the beam manipulation scheme. The design and error analysis of this 3MeV beam dump line will be discussed in this paper.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI090

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPRO096

Field Measurement of the Quadrupole Magnet for CSNS/RCS

1265

L. Li, C.D. Deng, W. Kang, S. Li, D. Tang, H.J. Wang, B. Yin, Z. Zhang, J.X. Zhou
IHEP, Beijing, People's Republic of China

The quadrupole magnets are being manufactured and measured for China Spoliation Neutron Source Rapid Cycling Synchrotron (CSNS/RCS) since 2012. In order to evaluate the magnet qualities, a dedicated magnetic measurement system has been developed. The main quadrupole magnets have been excited with DC current biased 25Hz repetition rate. The measurement of magnetic field was mainly based on integral field and harmonics measurements at both static and dynamic conditions. This paper describes the magnet design, the field measurement system and presents the results of the quadrupole magnet.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO096

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPME138

Dynamic Comparison With XAL and Tracewin Based on the Injector-I of China ADS Test Stand

3572

Y.L. Zhao, P. Cheng, H. Geng, C. Meng, S. Pei, B. Sun, H.J. Wang, B. Xu, F. Yan
IHEP, Beijing, People's Republic of China

The injector scheme I (injector-I) of China ADS test stand is a superconducting Linac which accelerates 10mA beam to 3.2MeV, 5MeV, 10MeV, and then transports it to the dump. The dump line is designed to meet the requirement of beam expansion at the three different energies. The XAL from SNS was selected for the commissioning of China ADS. Because the beam current is so high, the nonlinear space charge force cannot be omitted. As we know, XAL calculates the space charge force with linear resolver. So, whether it could display the beam exactly enough is an important issue to consider. As a preparation for beam commissioning, the virtual accelerator in XAL frame was built and tested. Here in this paper, the envelopes of the 5MeV and 10MeV lattices from general XAL mpx application are shown and compared with the multiparticle tracking code TraceWin.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME138

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPME139

Emittance Measurement with Wire Scanners at CADS MEBT1

3575

H. Geng, P. Cheng, C. Meng, S. Pei, B. Sun, H.J. Wang, B. Xu, F. Yan, Y.L. Zhao
IHEP, Beijing, People's Republic of China

The C-ADS project has started beam commissioning. The ion source and LEBT has been commissioned successfully, while the RFQ is under conditioning. The Medium Energy Beam Transport line-1 (MEBT) is the place where extensive beam parameter measurement will be carried out. Beam emittance is one of the most critical parameters which have to characterized. In the C-ADS injector-I, the MEBT-1 has installed three wire scanners to measure the beam sizes. The transverse emittance measurement method using the wire scanners will be discussed in detail in this paper.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME139

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)