IPAC2019 - Classification: MC7: Accelerator Technology / T09 Room Temperature Magnets

Paper	Title	Page
THPRB043	Design and Simulation of Thin Eddy-Current Septum for Injection of Diffraction Limited Storage Ring	3908
	J. Tong, M. Gu, B. Liu, Y.F. Liu, R. Wang SINAP, Shanghai, People’s Republic of China
	Funding: Work supported by the National Key Research and Development Program of China(Grant No.2016YFA0402002) Ultra-low emittance in Diffraction Limited Storage Ring (DLSR) usually has small Dynamic Aperture (DA), which makes the traditional off-axis injection inadequate. Fast kickers together with thin septum magnets or direct current lambertsons could support on-axis injection for closely-spaced bunches with small DA. Thin eddy-current septum prototype had been designed for injection with laminated silicon steel sheets as magnet core. Theoretical analysis and transient simulation had been carried out within OPERA software. Due to the minimum thickness of the septa is only 1 mm , several optimization approaches had been applied, such as shielding with strongly paramagnetic material and exciting with full cycle driving pulse, to satisfy the requirement that the leakage field is less than 0.1% with respect to the main one.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPRB043
About •	paper received ※ 29 April 2019 paper accepted ※ 21 May 2019 issue date ※ 21 June 2019
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THPTS017	ILSF Ultralow Emittance Storage Ring Magnets	4142
	F. Saeidi, S. Dastan, J. Rahighi, M. Razazian ILSF, Tehran, Iran
	Iranian Light Source Facility (ILSF) is a 3 GeV synchro-tron which is in the basic design phase. The ILSF storage ring (SR) is based on a Five-Bend Achromat lattice providing a low horizontal beam emittance of 270 pm-rad. The ILSF storage ring consists of 100 combined di-pole magnets of 2 types, 240 quadrupoles in 5 families and also 320 sextupoles in 6 families. In this paper, we present some design features of the SR magnets and dis-cuss the detailed physical design of these electromagnets including electrical and cooling calculations. Using POISSON and OPERA codes [1,2], pole and yoke geome-try was developed for each magnet
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS017
About •	paper received ※ 30 April 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019
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THPTS018	ILSF Booster Magnets for the New Low Emittance Lattice	4145
	F. Saeidi, S. Dastan, S. Fatehi, J. Rahighi, M. Razazian ILSF, Tehran, Iran
	Iranian light source facility is a new 3rd generation light source with a booster which is supposed to work at 150 keV injection energy and guide the electrons to a 3GeV ring. It consists of 50 combined dipole magnets in one type, 50 quadrupoles and 15 sextupoles in one family. Using POISSON and OPERA3D codes[1,2], pole and yoke geometry was designed for each magnet and also cooling and electrical calculations have been done. ILSF has attempted to mechanical design and build prototype magnets which are ongoing at this stage too.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS018
About •	paper received ※ 30 April 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019
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THPTS020	ESS Magnets at Elettra Sincrotrone Trieste	4148
	D. Castronovo, D. Caiazza, A. Fabris, R. Fabris, A. Gubertini, G. Loda Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	Elettra Sincrotrone Trieste Research Center (Elettra) is one the Italian Institutions committed to the realization of the Italian in-kind contributions for the European Spallation Source. One of these consists in the supply of several conventional iron dominated electro-magnets to be installed in the superconducting part of the linac and in the transfer lines. The total number of magnets amounts to 2 dipoles, 139 quadrupoles, of four different families, and 72 correctors, of three different types. This document reports all related magnetic design and optimisations carried out to meet the required specifications and on the status of production and testing.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS020
About •	paper received ※ 14 May 2019 paper accepted ※ 21 May 2019 issue date ※ 21 June 2019
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THPTS021	Magnets for Elettra 2.0	4152
	D. Castronovo, E. Karantzoulis Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	After 25 years of faithfully serving the user community with excellent results, Elettra need a major upgrade with a new compact latice that will replace the existing double bend achromat for the reducing of the horizontal emittance and the increasing of the brilliance and coherence of the X-ray beam. This paper report the magnetic design development and optimisations carried out in order to satisfy the layout feasibility and the magnet strengths.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS021
About •	paper received ※ 15 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019
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THPTS024	Magnet Developments and Precise Alignment Schemes for SPring-8-II	4158
	K. Fukami, T. Aoki, N. Azumi, H. Kimura, S. Matsubara, S. Takano, T. Taniuchi, T. Watanabe, K. Yanagida, C. Zhang JASRI, Hyogo, Japan N. Azumi, K. Fukami, H. Kimura, S. Matsui, S. Takano, T. Watanabe RIKEN SPring-8 Center, Hyogo, Japan S.I. Inoue, T. Kai, J. Kiuchi SES, Hyogo-pref., Japan
	The magnet lattice design of the SPring-8 upgrade, SPring-8-II, is a five bend achromat composed of one normal and four longitudinal gradient bending magnets. Permanent magnet has been chosen for both types of the dipoles, and the high gradient multipole magnets are all electromagnets. This presentation will overview the magnet developments and precise alignment schemes for SPring-8-II, focusing specifically on the following features. Temperature insensitive magnetic circuits with a function of fine magnetic field tuning have been developed for the permanent magnet dipoles. Narrow bore multipole magnets with compact coil assemblies have been designed. We optimized the shimming for enough good field regions, and minimized ohmic loss at the coils for suppressing thermal deformation. To improve the accuracy of vibrating wire magnet alignment, practical wire sag distributions have been quantitatively evaluated. In 2018, a test half-cell was constructed by which the feasibilities of the magnets and the overall alignment precisions including the effects of the thermal deformation of magnets, a repeatability of magnet reassembly has been confirmed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS024
About •	paper received ※ 10 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019
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THPTS027	Accelerator Implementing Development of Ceramics Chamber with Integrated Pulsed Magnet for Beam Test	4164
	C. Mitsuda, Y. Kobayashi, S. Nagahashi, T. Nogami, T. Obina, R. Takai, H. Takaki, T. Uchiyama, A. Ueda KEK, Ibaraki, Japan T. Honiden, T. Nakanishi SES, Hyogo-pref., Japan A. Sasagawa, A. Yokoyama, T. Yokoyama KYOCERA Corporation, Higashiomi-city, Shiga, Japan
	We advance the development of Ceramics Chamber Integrated Pulsed Magnet (CCIPM) of air-core type as the application to low emittance ring with a narrow bore of light source accelerator in the future. The CCIPM is composed of ceramics cylinder of 60 mm diameter and four copper coils, which are implanted in the groove penetrated on the ceramic thickness along 30 cm length by silver brazing. In addition to this structure, we succeeded in the implementations of cable connecting base that mechanically connect the coils and power supply with feeder lines and the pattern shape coating inside the ceramic cylinder. Improved brazing technique made it possible to braze the coil and the base on the coil at the same time that the coils are implanted in the ceramic thickness. Newly developed functional coating can reduce the eddy current caused by main magnetic field and pass the alternate component of beam wall current by capacitance structure. We report the details about the performance from the viewpoint of vacuum, magnetic field, insulation on the accelerator implementation with the approach to new technical development, and the preparation progress of beam test in beam-transport line. C. Mitsuda, et al., in Proc. IPAC2015, Richmond, VA, USA, p. 2879
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS027
About •	paper received ※ 12 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019
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THPTS028	Recent Improvements and Future Upgrades of the J-PARC Main Ring Kicker Systems	4167
	T. Sugimoto, K. Ishii, H. Matsumoto, T. Shibata KEK, Ibaraki, Japan
	J-PARC Main Ring provides 500kW proton beam to the long baseline neutrino oscillation experiment (T2K). In order to increase the beam intensity to improve the sensitivity of the CP violation study in neutrino sector, shorter repetition cycle and higher beam current are required. As part of the upgrade project, both injection and fast-extraction (Fx) kicker magnet systems have been improved. Air-cooled non-inductive ceramic resistors are used as the impedance-matching terminator for the injection kicker magnet. Power consumption and temperature rise of the termination resistor due to the beam induced current was simulated to optimize the number of parallel of the resistors. Efficiency of cooling fans was also simulated to improve the cooling ability. For the Fx kicker magnet, a fast charging power supply of the modulator was developed and deployed to shorten the charging period from 1.4 sec to 0.2 sec. This paper represents the simulation results, performance of the charging unit and future upgrade plans.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS028
About •	paper received ※ 21 May 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019
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THPTS029	Optimization of Staggered Array Undulator	4171
	L.J. Chen, Q.K. Jia USTC/NSRL, Hefei, Anhui, People’s Republic of China M. Li, P. Li, J. Wang, D. Wu, D.X. Xiao, L.G. Yan, X. Yang CAEP/IAE, Mianyang, Sichuan, People’s Republic of China
	Funding: the National Key Research and Development Program of China under Grant No. 2016YFA0402003 the National Nature Science Foundation of China under Grant No. 11611140102. The staggered array undulator consists of staggered poles and solenoid coils that form a periodically aligned transverse magnetic field in the pole gap. The addition of magnets in the longitudinal gap between the poles further enhances the peak field strength of the undulator. A method of enhancing the peak field strength of the undulator using cryogenic temperature permanent magnets and adding side magnets has been studied. The remanence of the magnet will increase at low temperatures and the peak field strength of the undulator will increase. The side magnets do not increase the maximum peak field strength of the undulator, but can reduce the solenoid magnetic field requirements and reduce the solenoid volume and cost. The influence of the special magnetic pole and magnet shape on the peak field strength of the undulator has also been studied.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS029
About •	paper received ※ 14 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019
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THPTS043	PRELIMINARY MAGNETIC FIELD CALCULATION OF A 30-DEGREE DIPOLE MAGNET	4204
	H. Liang, J. Huang, C. Jiang, T. Liu, B. Qin, K. Tang, J. Yang, J.Q. Ye HUST, Wuhan, People’s Republic of China Y. Xie, T. Yu Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People’s Republic of China
	Preliminary design and field calculation of a 30-degree H-type dipole which can be applied to the beamline is introduced in this paper. According to the phys-ical requirements, 2D and 3D models are built and ana-lysed using OPERA. For achieving the magnetic field specifications, air slots are adopted, and trapezoidal shim on pole surface is used to improve the magnetic field error. Rogowski curve and harmonic shim at the pole end is used to reduce the integral magnetic field error and the higher order harmonic field error.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS043
About •	paper received ※ 13 May 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019
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THPTS044	Parameter Design of a Rotating Coil Measurement System for Quadrupoles	4207
	Y. Xie, W. Chen Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People’s Republic of China H. Liang, B. Qin, J. Yang HUST, Wuhan, People’s Republic of China
	Funding: This work was supported by The National Key Research and Development Program of China; and by National Natural Science Foundation of China (11375068). HUST-PTF is a 5-year National Key Research and Development Program of China which is composed of cyclotron, beamline system, treatment chambers, etc. The beamline system connects the cyclotron and treatment chambers, provides proton beams in adequate size and shape and is crucial to the whole program. Vast dipoles and quadrupoles are employed in the beamline. Aimed at the quadrupoles used in the beamline, this article carried out the research on the high-precision rotating coil magnetic measurements for quadrupoles, including the quadrupole parameters, the principle and structure of the measuring system, measuring procedures and data processing method. Design of the rotating coils and analysis of the main errors are also contained.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS044
About •	paper received ※ 13 May 2019 paper accepted ※ 21 May 2019 issue date ※ 21 June 2019
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THPTS045	Preparation of Titanum-Zirconium-Vanadium Films by Quantitative Deposition	4210
	J.Q. Shao, C. Chen, X.Q. Ge, W. Li, S. Wang, Y. Wang, W. Wei, B. Zhang, Y.X. Zhang, B.L. Zhu USTC/NSRL, Hefei, Anhui, People’s Republic of China
	TiZrV has been used in vacuum technology and electric vacuum devices due to its high pumping speed and low activation temperature in recent years. At the same time, many preparation methods have been developed. Different from the current coating method of magnetron sputtering, this paper discusses the preparation of thin film coating from the viewpoint of vacuum sintering, which is flexible in design and more suitable for operation. Based on the analysis of the surface morphology of the sintered film, the feasibility and operability of the experimental method were explored from the surface compactness of the getter.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS045
About •	paper received ※ 25 April 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019
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THPTS055	Design and Construction of 3D Helmholtz Coil System to Calibrate 3D Hall Probes	4228
	J. Marcos, J. Campmany, A. Fontanet, V. Massana, L.R.M. Ribó ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	In this paper we present the design of a system of 3D Helmholtz coils aimed to generate a magnetic field in any direction in a controlled way. The system is intended to be applied to the detailed characterisation of the response of 3D Hall probes as a function of the orientation of the measured field. The system will generate magnetic fields of up to 5 mT with an expected angular precision of 0.2 mrad.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS055
About •	paper received ※ 26 April 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019
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THPTS056	New Undulator and Front End for XAIRA Beamline at ALBA	4231
	J. Campmany, J. Marcos, V. Massana ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	A new microfocus beamline for macromolecular crystallography, XAIRA, is being built at ALBA synchrotron light source. The light source for this new beamline is an in-vacuum undulator that can reach the spectrum range from 4 keV up to 20 keV. The in-vacuum undulator was terndered in 2018 and awarded to Kyma-RI consortium, and will be delivered to ALBA in November 2019. The Front End has been designed accordingly. It was tendered in 2018 and awarded to FMB. It will be delivered along second semester of 2019. In this paper we present the ID and FE designs.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS056
About •	paper received ※ 11 April 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019
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THPTS057	New Small Diameter Rotating Coil Shaft for Characterizing New Generation of Multipolar Magnets	4234
	J. Marcos, J. Campmany, V. Massana, R. Petrocelli, L.R.M. Ribó ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	The proliferation of ultimate-light source facilities around the world has yielded the need of accurate characterization of small gap magnets. This also applies to multipolar magnets. Clearance diameters down to 10 mm for quadrupoless and sextupoles become to be used and need to be accurately measured. At these small gaps, the high order multipoles influence on electron beam dynamics is high, and it should be well characterized in order to guarantee a feasible operation of the accelerator. To face this challenge, ALBA magnetics measurement laboratory has developed a new rotating coil shaft with a diameter of 10 mm able to be introduced inside narrow-gap multipolar magnets. In this paper we present the design as well as the first characterization of such a device.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS057
About •	paper received ※ 11 April 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019
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THPTS076	Design and Construction of Sextupole Magnet Prototype for Siam Photon Source II Project	4295
	S. Prawanta, B. Boonwanna, P. Klysubun, A. Kwankasem, S. Pongampai, V. Sooksrimuang, P. Sudmuang, P. Sunwong SLRI, Nakhon Ratchasima, Thailand
	Siam Photon Source II (SPS-II) project in Thailand is the third-generation synchrotron light source. The lattice of the 3 GeV electron storage ring has been designed, consisting of 14 Double Triple Bend Achromat (DTBA) cells with the total circumference of 321.3 m. The storage ring lattice includes 56 bending magnets, 28 combined dipole and quadrupole magnets, 224 quadrupole magnets and 84 multifunction sextupole magnets. This paper presents the design and construction of a sextupole magnet prototype for SPS-II project. Magnet prototype was designed with the magnetic field gradient of 2,030 T/m2 and includes functions of skew-quadrupole, horizontal and vertical correctors. The magnetic core is made of S10C low-carbon steel. A prototype of sextupole magnet has been constructed. All dimensional tolerances are within the range of ±20 µm.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS076
About •	paper received ※ 15 May 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019
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THPTS088	CBETA Permanent Magnet Production Run	4318
	S.J. Brooks, G.J. Mahler, R.J. Michnoff, J.E. Tuozzolo BNL, Upton, Long Island, New York, USA
	214 neodymium permanent magnets have been manufactured for the return loop of the CBETA multi-turn ERL being built at Cornell University. There are 5 types of quadrupole and combined-function gradient magnets using a variant of the circular Halbach design. These are made out of NdFeB material and glued into an aluminium housing with water channels for temperature stabilisation. The NdFeB wedges and magnet construction were done by outside companies, while the final "tuning" using inserts containing 64 iron wires per magnet was done at BNL over a period of about 6 months. Average relative field errors of 2.3·10^-4 were achieved on the beam region. The magnet strengths vary by type but are of order 10T/m for quadrupole component and up to 0.3T for the dipole. This paper reports on the field quality and timeline achieved in this production process.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS088
About •	paper received ※ 11 April 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019
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THPTS094	High Gradient Quadrupoles for Low Emittance Synchrtrons	4332
	S.K. Sharma, T.V. Shaftan, V.V. Smaluk, C.J. Spataro, T. Tanabe, G.M. Wang BNL, Upton, Long Island, New York, USA N.A. Mezentsev BINP SB RAS, Novosibirsk, Russia
	A new lattice design has been proposed recently based on a Complex-Bend concept [1,2] for low emittance syn-chrotrons. The dipoles of a standard DBA lattice are replaced in the Complex Bend by high-gradient (~ 450 T/m) quadrupoles interleaved between discrete dipoles. In another version of the Complex Bend [3] the high gradient quadrupoles are displaced transversely along the beam trajectory to generate the required dipole field. In the latter version the quadrupole strength is reduced to ~ 250 T/m for a lattice that will conform to the layout of the existing NSLS-II 3-GeV storage ring. In this paper we present conceptual designs of a Halbach permanent-magnet (PM) quadrupole, a hybrid PM quadrupole, and a superconducting quadrupole, that can produce the de-sired quadrupole strengths for the Complex Bend appli-cation. REFERENCES [1] T. Shaftan, V. Smaluk and G. Wang, ’The Concept of Com-plex Bend’, NSLS-II Tech note No. 276, Jan 2018. [2] G. Wang et al., ’Complex Bend: Strong-focusing magnet for low emittance synchrotrons’, Physical Review Accelerators and Beams, 21, 100703 (2018). [3] G. Wang et al., ’Complex Bend II’, paper submitted to Physi-cal Review Accelerators and Beams.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS094
About •	paper received ※ 15 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019
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FRXXPLM2	Magnet Design for Siam Photon Source II	4361
	P. Sunwong, P. Klysubun, T. Phimsen, S. Prawanta, P. Sudmuang SLRI, Nakhon Ratchasima, Thailand
	Siam Photon Source II project has been approved and detailed technical design of the accelerator system is currently in progress. The Double Triple Bend Achromat (DTBA) lattice is implemented in the storage ring design for low emittance and more space for insertion devices. Magnets with moderate to high field requirements have been designed, including combined function magnet with the field gradient of 27.1 T/m, quadrupole magnets with the field gradient up to 60 T/m and multifunction sextupole magnets. This work presents the magnet requirement and specification, design concept, recent simulation results and analysis of the magnetic field quality. A plan for prototype development is also discussed.
	Slides FRXXPLM2 [1.475 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-FRXXPLM2
About •	paper received ※ 15 May 2019 paper accepted ※ 21 May 2019 issue date ※ 21 June 2019
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Paper

Title

Page

Design and Simulation of Thin Eddy-Current Septum for Injection of Diffraction Limited Storage Ring

3908

J. Tong, M. Gu, B. Liu, Y.F. Liu, R. Wang
SINAP, Shanghai, People’s Republic of China

Funding: Work supported by the National Key Research and Development Program of China(Grant No.2016YFA0402002)
Ultra-low emittance in Diffraction Limited Storage Ring (DLSR) usually has small Dynamic Aperture (DA), which makes the traditional off-axis injection inadequate. Fast kickers together with thin septum magnets or direct current lambertsons could support on-axis injection for closely-spaced bunches with small DA. Thin eddy-current septum prototype had been designed for injection with laminated silicon steel sheets as magnet core. Theoretical analysis and transient simulation had been carried out within OPERA software. Due to the minimum thickness of the septa is only 1 mm , several optimization approaches had been applied, such as shielding with strongly paramagnetic material and exciting with full cycle driving pulse, to satisfy the requirement that the leakage field is less than 0.1% with respect to the main one.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPRB043

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paper received ※ 29 April 2019 paper accepted ※ 21 May 2019 issue date ※ 21 June 2019

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THPTS017

ILSF Ultralow Emittance Storage Ring Magnets

4142

F. Saeidi, S. Dastan, J. Rahighi, M. Razazian
ILSF, Tehran, Iran

Iranian Light Source Facility (ILSF) is a 3 GeV synchro-tron which is in the basic design phase. The ILSF storage ring (SR) is based on a Five-Bend Achromat lattice providing a low horizontal beam emittance of 270 pm-rad. The ILSF storage ring consists of 100 combined di-pole magnets of 2 types, 240 quadrupoles in 5 families and also 320 sextupoles in 6 families. In this paper, we present some design features of the SR magnets and dis-cuss the detailed physical design of these electromagnets including electrical and cooling calculations. Using POISSON and OPERA codes [1,2], pole and yoke geome-try was developed for each magnet

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS017

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paper received ※ 30 April 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019

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THPTS018

ILSF Booster Magnets for the New Low Emittance Lattice

4145

F. Saeidi, S. Dastan, S. Fatehi, J. Rahighi, M. Razazian
ILSF, Tehran, Iran

Iranian light source facility is a new 3rd generation light source with a booster which is supposed to work at 150 keV injection energy and guide the electrons to a 3GeV ring. It consists of 50 combined dipole magnets in one type, 50 quadrupoles and 15 sextupoles in one family. Using POISSON and OPERA3D codes[1,2], pole and yoke geometry was designed for each magnet and also cooling and electrical calculations have been done. ILSF has attempted to mechanical design and build prototype magnets which are ongoing at this stage too.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS018

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paper received ※ 30 April 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019

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THPTS020

ESS Magnets at Elettra Sincrotrone Trieste

4148

D. Castronovo, D. Caiazza, A. Fabris, R. Fabris, A. Gubertini, G. Loda
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy

Elettra Sincrotrone Trieste Research Center (Elettra) is one the Italian Institutions committed to the realization of the Italian in-kind contributions for the European Spallation Source. One of these consists in the supply of several conventional iron dominated electro-magnets to be installed in the superconducting part of the linac and in the transfer lines. The total number of magnets amounts to 2 dipoles, 139 quadrupoles, of four different families, and 72 correctors, of three different types. This document reports all related magnetic design and optimisations carried out to meet the required specifications and on the status of production and testing.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS020

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paper received ※ 14 May 2019 paper accepted ※ 21 May 2019 issue date ※ 21 June 2019

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THPTS021

Magnets for Elettra 2.0

4152

D. Castronovo, E. Karantzoulis
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy

After 25 years of faithfully serving the user community with excellent results, Elettra need a major upgrade with a new compact latice that will replace the existing double bend achromat for the reducing of the horizontal emittance and the increasing of the brilliance and coherence of the X-ray beam. This paper report the magnetic design development and optimisations carried out in order to satisfy the layout feasibility and the magnet strengths.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS021

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paper received ※ 15 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019

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THPTS024

Magnet Developments and Precise Alignment Schemes for SPring-8-II

4158

K. Fukami, T. Aoki, N. Azumi, H. Kimura, S. Matsubara, S. Takano, T. Taniuchi, T. Watanabe, K. Yanagida, C. Zhang
JASRI, Hyogo, Japan
N. Azumi, K. Fukami, H. Kimura, S. Matsui, S. Takano, T. Watanabe
RIKEN SPring-8 Center, Hyogo, Japan
S.I. Inoue, T. Kai, J. Kiuchi
SES, Hyogo-pref., Japan

The magnet lattice design of the SPring-8 upgrade, SPring-8-II, is a five bend achromat composed of one normal and four longitudinal gradient bending magnets. Permanent magnet has been chosen for both types of the dipoles, and the high gradient multipole magnets are all electromagnets. This presentation will overview the magnet developments and precise alignment schemes for SPring-8-II, focusing specifically on the following features. Temperature insensitive magnetic circuits with a function of fine magnetic field tuning have been developed for the permanent magnet dipoles. Narrow bore multipole magnets with compact coil assemblies have been designed. We optimized the shimming for enough good field regions, and minimized ohmic loss at the coils for suppressing thermal deformation. To improve the accuracy of vibrating wire magnet alignment, practical wire sag distributions have been quantitatively evaluated. In 2018, a test half-cell was constructed by which the feasibilities of the magnets and the overall alignment precisions including the effects of the thermal deformation of magnets, a repeatability of magnet reassembly has been confirmed.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS024

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paper received ※ 10 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019

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THPTS027

Accelerator Implementing Development of Ceramics Chamber with Integrated Pulsed Magnet for Beam Test

4164

C. Mitsuda, Y. Kobayashi, S. Nagahashi, T. Nogami, T. Obina, R. Takai, H. Takaki, T. Uchiyama, A. Ueda
KEK, Ibaraki, Japan
T. Honiden, T. Nakanishi
SES, Hyogo-pref., Japan
A. Sasagawa, A. Yokoyama, T. Yokoyama
KYOCERA Corporation, Higashiomi-city, Shiga, Japan

We advance the development of Ceramics Chamber Integrated Pulsed Magnet (CCIPM) of air-core type as the application to low emittance ring with a narrow bore of light source accelerator in the future. The CCIPM is composed of ceramics cylinder of 60 mm diameter and four copper coils, which are implanted in the groove penetrated on the ceramic thickness along 30 cm length by silver brazing*. In addition to this structure, we succeeded in the implementations of cable connecting base that mechanically connect the coils and power supply with feeder lines and the pattern shape coating inside the ceramic cylinder. Improved brazing technique made it possible to braze the coil and the base on the coil at the same time that the coils are implanted in the ceramic thickness. Newly developed functional coating can reduce the eddy current caused by main magnetic field and pass the alternate component of beam wall current by capacitance structure. We report the details about the performance from the viewpoint of vacuum, magnetic field, insulation on the accelerator implementation with the approach to new technical development, and the preparation progress of beam test in beam-transport line.
* C. Mitsuda, et al., in Proc. IPAC2015, Richmond, VA, USA, p. 2879

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS027

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paper received ※ 12 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019

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THPTS028

Recent Improvements and Future Upgrades of the J-PARC Main Ring Kicker Systems

4167

T. Sugimoto, K. Ishii, H. Matsumoto, T. Shibata
KEK, Ibaraki, Japan

J-PARC Main Ring provides 500kW proton beam to the long baseline neutrino oscillation experiment (T2K). In order to increase the beam intensity to improve the sensitivity of the CP violation study in neutrino sector, shorter repetition cycle and higher beam current are required. As part of the upgrade project, both injection and fast-extraction (Fx) kicker magnet systems have been improved. Air-cooled non-inductive ceramic resistors are used as the impedance-matching terminator for the injection kicker magnet. Power consumption and temperature rise of the termination resistor due to the beam induced current was simulated to optimize the number of parallel of the resistors. Efficiency of cooling fans was also simulated to improve the cooling ability. For the Fx kicker magnet, a fast charging power supply of the modulator was developed and deployed to shorten the charging period from 1.4 sec to 0.2 sec. This paper represents the simulation results, performance of the charging unit and future upgrade plans.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS028

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paper received ※ 21 May 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019

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THPTS029

Optimization of Staggered Array Undulator

4171

L.J. Chen, Q.K. Jia
USTC/NSRL, Hefei, Anhui, People’s Republic of China
M. Li, P. Li, J. Wang, D. Wu, D.X. Xiao, L.G. Yan, X. Yang
CAEP/IAE, Mianyang, Sichuan, People’s Republic of China

Funding: the National Key Research and Development Program of China under Grant No. 2016YFA0402003 the National Nature Science Foundation of China under Grant No. 11611140102.
The staggered array undulator consists of staggered poles and solenoid coils that form a periodically aligned transverse magnetic field in the pole gap. The addition of magnets in the longitudinal gap between the poles further enhances the peak field strength of the undulator. A method of enhancing the peak field strength of the undulator using cryogenic temperature permanent magnets and adding side magnets has been studied. The remanence of the magnet will increase at low temperatures and the peak field strength of the undulator will increase. The side magnets do not increase the maximum peak field strength of the undulator, but can reduce the solenoid magnetic field requirements and reduce the solenoid volume and cost. The influence of the special magnetic pole and magnet shape on the peak field strength of the undulator has also been studied.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS029

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paper received ※ 14 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019

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THPTS043

PRELIMINARY MAGNETIC FIELD CALCULATION OF A 30-DEGREE DIPOLE MAGNET

4204

H. Liang, J. Huang, C. Jiang, T. Liu, B. Qin, K. Tang, J. Yang, J.Q. Ye
HUST, Wuhan, People’s Republic of China
Y. Xie, T. Yu
Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People’s Republic of China

Preliminary design and field calculation of a 30-degree H-type dipole which can be applied to the beamline is introduced in this paper. According to the phys-ical requirements, 2D and 3D models are built and ana-lysed using OPERA. For achieving the magnetic field specifications, air slots are adopted, and trapezoidal shim on pole surface is used to improve the magnetic field error. Rogowski curve and harmonic shim at the pole end is used to reduce the integral magnetic field error and the higher order harmonic field error.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS043

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paper received ※ 13 May 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019

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THPTS044

Parameter Design of a Rotating Coil Measurement System for Quadrupoles

4207

Y. Xie, W. Chen
Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People’s Republic of China
H. Liang, B. Qin, J. Yang
HUST, Wuhan, People’s Republic of China

Funding: This work was supported by The National Key Research and Development Program of China; and by National Natural Science Foundation of China (11375068).
HUST-PTF is a 5-year National Key Research and Development Program of China which is composed of cyclotron, beamline system, treatment chambers, etc. The beamline system connects the cyclotron and treatment chambers, provides proton beams in adequate size and shape and is crucial to the whole program. Vast dipoles and quadrupoles are employed in the beamline. Aimed at the quadrupoles used in the beamline, this article carried out the research on the high-precision rotating coil magnetic measurements for quadrupoles, including the quadrupole parameters, the principle and structure of the measuring system, measuring procedures and data processing method. Design of the rotating coils and analysis of the main errors are also contained.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS044

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paper received ※ 13 May 2019 paper accepted ※ 21 May 2019 issue date ※ 21 June 2019

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THPTS045

Preparation of Titanum-Zirconium-Vanadium Films by Quantitative Deposition

4210

J.Q. Shao, C. Chen, X.Q. Ge, W. Li, S. Wang, Y. Wang, W. Wei, B. Zhang, Y.X. Zhang, B.L. Zhu
USTC/NSRL, Hefei, Anhui, People’s Republic of China

TiZrV has been used in vacuum technology and electric vacuum devices due to its high pumping speed and low activation temperature in recent years. At the same time, many preparation methods have been developed. Different from the current coating method of magnetron sputtering, this paper discusses the preparation of thin film coating from the viewpoint of vacuum sintering, which is flexible in design and more suitable for operation. Based on the analysis of the surface morphology of the sintered film, the feasibility and operability of the experimental method were explored from the surface compactness of the getter.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS045

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paper received ※ 25 April 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019

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THPTS055

Design and Construction of 3D Helmholtz Coil System to Calibrate 3D Hall Probes

4228

J. Marcos, J. Campmany, A. Fontanet, V. Massana, L.R.M. Ribó
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

In this paper we present the design of a system of 3D Helmholtz coils aimed to generate a magnetic field in any direction in a controlled way. The system is intended to be applied to the detailed characterisation of the response of 3D Hall probes as a function of the orientation of the measured field. The system will generate magnetic fields of up to 5 mT with an expected angular precision of 0.2 mrad.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS055

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paper received ※ 26 April 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019

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THPTS056

New Undulator and Front End for XAIRA Beamline at ALBA

4231

J. Campmany, J. Marcos, V. Massana
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

A new microfocus beamline for macromolecular crystallography, XAIRA, is being built at ALBA synchrotron light source. The light source for this new beamline is an in-vacuum undulator that can reach the spectrum range from 4 keV up to 20 keV. The in-vacuum undulator was terndered in 2018 and awarded to Kyma-RI consortium, and will be delivered to ALBA in November 2019. The Front End has been designed accordingly. It was tendered in 2018 and awarded to FMB. It will be delivered along second semester of 2019. In this paper we present the ID and FE designs.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS056

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paper received ※ 11 April 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019

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THPTS057

New Small Diameter Rotating Coil Shaft for Characterizing New Generation of Multipolar Magnets

4234

J. Marcos, J. Campmany, V. Massana, R. Petrocelli, L.R.M. Ribó
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

The proliferation of ultimate-light source facilities around the world has yielded the need of accurate characterization of small gap magnets. This also applies to multipolar magnets. Clearance diameters down to 10 mm for quadrupoless and sextupoles become to be used and need to be accurately measured. At these small gaps, the high order multipoles influence on electron beam dynamics is high, and it should be well characterized in order to guarantee a feasible operation of the accelerator. To face this challenge, ALBA magnetics measurement laboratory has developed a new rotating coil shaft with a diameter of 10 mm able to be introduced inside narrow-gap multipolar magnets. In this paper we present the design as well as the first characterization of such a device.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS057

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paper received ※ 11 April 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019

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THPTS076

Design and Construction of Sextupole Magnet Prototype for Siam Photon Source II Project

4295

S. Prawanta, B. Boonwanna, P. Klysubun, A. Kwankasem, S. Pongampai, V. Sooksrimuang, P. Sudmuang, P. Sunwong
SLRI, Nakhon Ratchasima, Thailand

Siam Photon Source II (SPS-II) project in Thailand is the third-generation synchrotron light source. The lattice of the 3 GeV electron storage ring has been designed, consisting of 14 Double Triple Bend Achromat (DTBA) cells with the total circumference of 321.3 m. The storage ring lattice includes 56 bending magnets, 28 combined dipole and quadrupole magnets, 224 quadrupole magnets and 84 multifunction sextupole magnets. This paper presents the design and construction of a sextupole magnet prototype for SPS-II project. Magnet prototype was designed with the magnetic field gradient of 2,030 T/m2 and includes functions of skew-quadrupole, horizontal and vertical correctors. The magnetic core is made of S10C low-carbon steel. A prototype of sextupole magnet has been constructed. All dimensional tolerances are within the range of ±20 µm.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS076

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paper received ※ 15 May 2019 paper accepted ※ 23 May 2019 issue date ※ 21 June 2019

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THPTS088

CBETA Permanent Magnet Production Run

4318

S.J. Brooks, G.J. Mahler, R.J. Michnoff, J.E. Tuozzolo
BNL, Upton, Long Island, New York, USA

214 neodymium permanent magnets have been manufactured for the return loop of the CBETA multi-turn ERL being built at Cornell University. There are 5 types of quadrupole and combined-function gradient magnets using a variant of the circular Halbach design. These are made out of NdFeB material and glued into an aluminium housing with water channels for temperature stabilisation. The NdFeB wedges and magnet construction were done by outside companies, while the final "tuning" using inserts containing 64 iron wires per magnet was done at BNL over a period of about 6 months. Average relative field errors of 2.3·10^-4 were achieved on the beam region. The magnet strengths vary by type but are of order 10T/m for quadrupole component and up to 0.3T for the dipole. This paper reports on the field quality and timeline achieved in this production process.

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS088

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paper received ※ 11 April 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019

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THPTS094

High Gradient Quadrupoles for Low Emittance Synchrtrons

4332

S.K. Sharma, T.V. Shaftan, V.V. Smaluk, C.J. Spataro, T. Tanabe, G.M. Wang
BNL, Upton, Long Island, New York, USA
N.A. Mezentsev
BINP SB RAS, Novosibirsk, Russia

A new lattice design has been proposed recently based on a Complex-Bend concept [1,2] for low emittance syn-chrotrons. The dipoles of a standard DBA lattice are replaced in the Complex Bend by high-gradient (~ 450 T/m) quadrupoles interleaved between discrete dipoles. In another version of the Complex Bend [3] the high gradient quadrupoles are displaced transversely along the beam trajectory to generate the required dipole field. In the latter version the quadrupole strength is reduced to ~ 250 T/m for a lattice that will conform to the layout of the existing NSLS-II 3-GeV storage ring. In this paper we present conceptual designs of a Halbach permanent-magnet (PM) quadrupole, a hybrid PM quadrupole, and a superconducting quadrupole, that can produce the de-sired quadrupole strengths for the Complex Bend appli-cation. REFERENCES [1] T. Shaftan, V. Smaluk and G. Wang, ’The Concept of Com-plex Bend’, NSLS-II Tech note No. 276, Jan 2018. [2] G. Wang et al., ’Complex Bend: Strong-focusing magnet for low emittance synchrotrons’, Physical Review Accelerators and Beams, 21, 100703 (2018). [3] G. Wang et al., ’Complex Bend II’, paper submitted to Physi-cal Review Accelerators and Beams.

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paper received ※ 15 May 2019 paper accepted ※ 22 May 2019 issue date ※ 21 June 2019

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FRXXPLM2

Magnet Design for Siam Photon Source II

4361

P. Sunwong, P. Klysubun, T. Phimsen, S. Prawanta, P. Sudmuang
SLRI, Nakhon Ratchasima, Thailand

Siam Photon Source II project has been approved and detailed technical design of the accelerator system is currently in progress. The Double Triple Bend Achromat (DTBA) lattice is implemented in the storage ring design for low emittance and more space for insertion devices. Magnets with moderate to high field requirements have been designed, including combined function magnet with the field gradient of 27.1 T/m, quadrupole magnets with the field gradient up to 60 T/m and multifunction sextupole magnets. This work presents the magnet requirement and specification, design concept, recent simulation results and analysis of the magnetic field quality. A plan for prototype development is also discussed.

Slides FRXXPLM2 [1.475 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-FRXXPLM2

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paper received ※ 15 May 2019 paper accepted ※ 21 May 2019 issue date ※ 21 June 2019

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