IPAC2016 - List of Keywords (wiggler)

Paper	Title	Other Keywords	Page
TUPMB012	Optimization of the Field Integrals of Two Small Gap IDs for CLS	multipole, undulator, vacuum, synchrotron-radiation	1133
	M.F. Qian, Y.Z. He, H.F. Wang, W. Zhang, Q.G. Zhou SINAP, Shanghai, People's Republic of China
	An in-vacuum undulator and an in-vacuum wiggler have been developed for CLS at SSRF recently. The period lengths of the undulator and the wiggler are 20mm and 80mm respectively. Both IDs have the minimum gap of 5.2mm. The field integrals were measured for each magnet block with two poles and were sorted in-situ as they were installed on to the girders. Finally the field integrals of the undulator and the wiggler were shimmed by using the 'Magic Fingers' at the ends with a special algorithm. This paper reports the procedure and the results of the measurement and the optimization for the field integrals.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMB012
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WEPMW002	A CLIC Damping Wiggler Prototype at ANKA: Commissioning and Preparations for a Beam Dynamics Experimental Program	damping, storage-ring, operation, simulation	2412
	A. Bernhard, S. Casalbuoni, S. Gerstl, J. Gethmann, A.W. Grau, E. Huttel, A.-S. Müller, D. Saez de Jauregui, N.J. Smale KIT, Karlsruhe, Germany A.V. Bragin, S.V. Khrushchev, N.A. Mezentsev, V.A. Shkaruba, V.M. Tsukanov, K. Zolotarev BINP SB RAS, Novosibirsk, Russia P. Ferracin, L. Garcia Fajardo, Y. Papaphilippou, H. Schmickler, D. Schoerling, P. Zisopoulos CERN, Geneva, Switzerland
	Funding: This work is partially funded by the German Federal Ministry of Education and Research under grant 05K12VK1 In a collaboration between CERN, BINP and KIT a prototype of a superconducting damping wiggler for the CLIC damping rings has been installed at the ANKA synchrotron light source. On the one hand, the foreseen experimental program aims at validating the technical design of the wiggler, particularly the conduction cooling concept applied in its cryostat design, in a long-term study. On the other hand, the wiggler's influence on the beam dynamics particularly in the presence of collective effects is planned to be investigated. ANKA's low-alpha short-bunch operation mode will serve as a model system for these studies on collective effects. To simulate these effects and to make verifiable predictions an accurate model of the ANKA storage ring in low-alpha mode, including the insertion devices is under parallel development. This contribution reports on the first operational experience with the CLIC damping wiggler prototype in the ANKA storage ring and steps towards the planned advanced experimental program with this device.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMW002
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WEPOW018	Elettra Status and Upgrades	emittance, operation, insertion, insertion-device	2864
	E. Karantzoulis, A. Carniel, S. Krecic, C. P. Pasotti Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	The operational status of the Italian 2.4/2.0 GeV third generation light source Elettra is presented together with the possible future upgrades especially concerning the next ultra low emittance light source Elettra2.0.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW018
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WEPOW045	Concepts for a Low Emittance-High Capacity Storage Ring for the Diamond Light Source	lattice, emittance, photon, dipole	2943
	R. Bartolini, G. Cinque, G. Evans, K. Sawhney, J. Zegenhagen DLS, Oxfordshire, United Kingdom
	The Diamond Light Source is investigating several paths for a possible machine upgrade to Diamond II. The exercise is driven by by a joint assessment of the science capabilities opened by a very low emittance ring and the machine design that will underpin them. The consultation is made on a beamline-by-beamline basis and has highlighted a significant preference for lattices that combine both a low emittance and large capacity for IDs.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW045
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THPMB023	Lattice Compensation of the Wiggler Effect in HLSII with Particle Swarm Optimization	storage-ring, lattice, insertion, insertion-device	3275
	G. Liu, L. Wang, K. Xuan USTC/NSRL, Hefei, Anhui, People's Republic of China
	The upgrade project of Hefei Light Source (HLSII) has successfully reduced the natural emittance of the electron beam to lower than 40 nm·rad at 800 MeV with five insertion devices installed. To provide enough straight sections for these insertion devices, the lattice structure has been changed to four double bend achromatic (DBA) with two super-periods from the former four triple bend achromatic (TBA). These different types of the insertion devices can greatly improve the performance of the light source, but simultaneously they can also influence the dynamics of the electron beam in the storage ring. Especially they can bring the distortion of the linear beam optics seriously. In order to make sure the stability and the quality of the beam meeting the design goal, the effect of these insertion devices must be compensated. In this paper, a direct compensation method is applied for the wiggler in the HLSII storage ring with the particle swarm optimization.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMB023
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THPMR034	Simulation of Single Particle Dynamics in a Compact Planar Wiggler	simulation, electron, focusing, synchrotron	3458
	D.A. Shkitov, A.E. Harisova, Y.N. Sutygina TPU, Tomsk, Russia
	In this report a description of a simple approach how to simulate a single particle track in a 3D magnetic field using Radia code is presented. Such a simulation maybe useful in order to briefly estimate in a short time the beam dynamics in the magnetic field produced by means of different types of the magnet devices. As an example, a low energy relativistic electron tracking* is performed in a compact 30 cm planar wiggler which produced ~0.4 T magnetic field. The changes of the electron entrance point and motion direction are also available. This simulation is carried out using three-dimensional magnetostatic code - Radia*, where the 4th order Runge-Kutta method was implemented for the trajectory calculations. Since Radia is the Mathematica add-on then a small Wolfram Language code is developed to create the wiggler model, to calculate the electron trajectory and to illustrate the simulation results. Knyazik A. et al. Status of UCLA helical permanent-magnet undulator // Proc. of PAC, Canada, WE5RFP076 (2009) 2441 ** http://www.esrf.eu/Accelerators/Groups/InsertionDevices/Software/Radia
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR034
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THPMR049	Minimization of Nonlinear Effects of Insertion Devices at SPS Storage Ring	electron, multipole, storage-ring, insertion	3515
	P. Sunwong, P. Klysubun, S. Kongtawong, S. Krainara, T. Pulampong, P. Sudmuang SLRI, Nakhon Ratchasima, Thailand T. Pulampong JAI, Oxford, United Kingdom
	Funding: Synchrotron Light Research Institute PO. Box 93 Nakhon Ratchasima 30000 Thailand Nonlinear effects of insertion devices were studied for the Siam Photon Source (SPS) storage ring. Despite the fact that shimming technique was used to minimize the nonlinear components of magnetic field integral arising from random errors, the nonlinear dynamics effects still remain. It was found that calculated dynamic field integrals are largest in the 2.2 T Hybrid Multipole Wiggler (MPW). Dynamics effects of insertion devices are attributed to the wiggling trajectory of electron in the region of magnetic field roll-off due to finite pole width. For better and more effective operation of the SPS storage ring, multipole components of the dynamic field integral in the MPW have to be further reduced.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR049
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THPMW001	SuperKEKB Main Ring Power Supply System	power-supply, operation, quadrupole, controls	3531
	S. Nakamura, T. Adachi, T. Oki, N. Tokuda KEK, Ibaraki, Japan
	The power supplies for magnets of KEKB main ring were recycled into SuperKEKB main ring. Several tests were performed for all of the power supplies to check the soundness. Some of the power supplies were improved to satisfy the requirements of optical design, and some of them were replaced by new power supplies. Most of the trim-coils were arranged with one of power supply per a coil in SuperKEKB. The total number of the power supplies is over 2000.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMW001
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THPOR006	SuperKEKB Main Ring Magnet System	sextupole, dipole, alignment, quadrupole	3778
	M. Masuzawa, K. Egawa, H. Iinuma, T. Kawamoto, S. Nakamura, Y. Ohsawa, T. Oki, R. Sugahara, N. Tokuda KEK, Ibaraki, Japan
	SuperKEKB is an electron-positroncollider, which aims to achieve a peak luminosity 40 times higher than that of KEKB by using the so-called 'nano-beam' scheme. A major upgrade to the Main Ring (MR) magnet system was needed to realize this scheme. The upgrade includes 1) new beam lines in the entire interaction region;2) replacement of the main dipole magnets in the positron ring; 3) a new layout of the wiggler sections in the positron ring, and newly added wiggler section in the electron ring, and; 4) sextupole magnets with tunable tilting tables to control the ratio of skew/normal sextupole components in the positron ring. More than 400 magnets were designed, fabricated, field-measured, installed in the tunnel and aligned in time for Phase 1 commissioning. Alignment of the MR magnets was challenging, since the survey network was destroyed by the Great East Japan Earthquake. Tunnel position changes during the magnet alignment work caused by construction of a new facilities building made the alignment work even more challenging. Construction of the MR magnet system and its first commissioning are reported.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOR006
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THPOW036	Evaluation of Immutability against Radiation-induced Demagnetization for a Hybrid Wiggler with NdFeB Magnets at the Canadian Light Source	radiation, electron, injection, operation	4022
	C.K. Baribeau, D. Bertwistle, L.O. Dallin, J.M. Vogt, W.A. Wurtz CLS, Saskatoon, Saskatchewan, Canada
	The BioXAS beamline at Canadian Light Source installed a hybrid wiggler in 2013. Quantitative studies building on the experience of other facilities suggest the wiggler's NdFeB magnets are at risk of demagnetization due to radiation induced by the synchrotron's 2.9 GeV electrons. We use a phenomenological model to convert simulated peak demagnetizing fields into a radiation dose corresponding to a chosen %-demagnetization, and compare against an estimated dose per year due to injected beam. We find that injecting with the wiggler closed will cause 1% demagnetization in sections of its magnet blocks within 2 years of operation, assuming a worst case scenario. The wiggler has thus far been forced open for injections, but this will cease to be an option when CLS moves to top-up operation. In a related test, qualitative measurements of radiation during injections with the wiggler closed were taken by covering its magnets in Polaroid film. We find that radiation drops significantly when the injection efficiency is well-tuned. Our results suggest the wiggler will not receive damaging levels of radiation at closed gap so long as the injection system remains optimized.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOW036
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THPOW048	Optimization of a Multipole Wiggler for Tps	photon, electron, radiation, permanent-magnet	4050
	J.C. Jan, C.-H. Chang, T.Y. Chung, J.C. Huang, C.-S. Hwang, C.Y. Kuo NSRRC, Hsinchu, Taiwan
	Taiwan Photon Source (TPS) is a synchrotron radia-tion facility with electron energy 3 GeV that was commissioned in 2015. Taiwan Light Source (TLS) with electron energy 1.5 GeV concurrently provides user time. Three beam lines of TLS supply photons of energy 6-18 keV for user experiments; these beam lines are served with an in-achromatic superconduct-ing wiggler (IASW, 3.1 T). This superconducting inser-tion device has the disadvantages of complicated maintenance and operation. A traditional multipole wiggler (MPW) magnet of hybrid type is hence planned to be installed in TPS to cover the range of photon energy of IASW for user experiments. For the design of the magnetic circuit, the side block and the extreme block are arranged surrounding a Permendur Vanadium cobalt steel pole that enhances the field strength and good field region of a MPW magnet. The dynamic integral field and the demagnetizing field of MPW magnet were estimated. The optimization of the pole dimensions and photon characteristics were simu-lated and are discussed in this work.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOW048
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Paper

Title

Other Keywords

Page

TUPMB012

Optimization of the Field Integrals of Two Small Gap IDs for CLS

multipole, undulator, vacuum, synchrotron-radiation

1133

M.F. Qian, Y.Z. He, H.F. Wang, W. Zhang, Q.G. Zhou
SINAP, Shanghai, People's Republic of China

An in-vacuum undulator and an in-vacuum wiggler have been developed for CLS at SSRF recently. The period lengths of the undulator and the wiggler are 20mm and 80mm respectively. Both IDs have the minimum gap of 5.2mm. The field integrals were measured for each magnet block with two poles and were sorted in-situ as they were installed on to the girders. Finally the field integrals of the undulator and the wiggler were shimmed by using the 'Magic Fingers' at the ends with a special algorithm. This paper reports the procedure and the results of the measurement and the optimization for the field integrals.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMB012

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WEPMW002

A CLIC Damping Wiggler Prototype at ANKA: Commissioning and Preparations for a Beam Dynamics Experimental Program

damping, storage-ring, operation, simulation

2412

A. Bernhard, S. Casalbuoni, S. Gerstl, J. Gethmann, A.W. Grau, E. Huttel, A.-S. Müller, D. Saez de Jauregui, N.J. Smale
KIT, Karlsruhe, Germany
A.V. Bragin, S.V. Khrushchev, N.A. Mezentsev, V.A. Shkaruba, V.M. Tsukanov, K. Zolotarev
BINP SB RAS, Novosibirsk, Russia
P. Ferracin, L. Garcia Fajardo, Y. Papaphilippou, H. Schmickler, D. Schoerling, P. Zisopoulos
CERN, Geneva, Switzerland

Funding: This work is partially funded by the German Federal Ministry of Education and Research under grant 05K12VK1
In a collaboration between CERN, BINP and KIT a prototype of a superconducting damping wiggler for the CLIC damping rings has been installed at the ANKA synchrotron light source. On the one hand, the foreseen experimental program aims at validating the technical design of the wiggler, particularly the conduction cooling concept applied in its cryostat design, in a long-term study. On the other hand, the wiggler's influence on the beam dynamics particularly in the presence of collective effects is planned to be investigated. ANKA's low-alpha short-bunch operation mode will serve as a model system for these studies on collective effects. To simulate these effects and to make verifiable predictions an accurate model of the ANKA storage ring in low-alpha mode, including the insertion devices is under parallel development. This contribution reports on the first operational experience with the CLIC damping wiggler prototype in the ANKA storage ring and steps towards the planned advanced experimental program with this device.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMW002

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WEPOW018

Elettra Status and Upgrades

emittance, operation, insertion, insertion-device

2864

E. Karantzoulis, A. Carniel, S. Krecic, C. P. Pasotti
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy

The operational status of the Italian 2.4/2.0 GeV third generation light source Elettra is presented together with the possible future upgrades especially concerning the next ultra low emittance light source Elettra2.0.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW018

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WEPOW045

Concepts for a Low Emittance-High Capacity Storage Ring for the Diamond Light Source

lattice, emittance, photon, dipole

2943

R. Bartolini, G. Cinque, G. Evans, K. Sawhney, J. Zegenhagen
DLS, Oxfordshire, United Kingdom

The Diamond Light Source is investigating several paths for a possible machine upgrade to Diamond II. The exercise is driven by by a joint assessment of the science capabilities opened by a very low emittance ring and the machine design that will underpin them. The consultation is made on a beamline-by-beamline basis and has highlighted a significant preference for lattices that combine both a low emittance and large capacity for IDs.

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reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW045

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THPMB023

Lattice Compensation of the Wiggler Effect in HLSII with Particle Swarm Optimization

storage-ring, lattice, insertion, insertion-device

3275

G. Liu, L. Wang, K. Xuan
USTC/NSRL, Hefei, Anhui, People's Republic of China

The upgrade project of Hefei Light Source (HLSII) has successfully reduced the natural emittance of the electron beam to lower than 40 nm·rad at 800 MeV with five insertion devices installed. To provide enough straight sections for these insertion devices, the lattice structure has been changed to four double bend achromatic (DBA) with two super-periods from the former four triple bend achromatic (TBA). These different types of the insertion devices can greatly improve the performance of the light source, but simultaneously they can also influence the dynamics of the electron beam in the storage ring. Especially they can bring the distortion of the linear beam optics seriously. In order to make sure the stability and the quality of the beam meeting the design goal, the effect of these insertion devices must be compensated. In this paper, a direct compensation method is applied for the wiggler in the HLSII storage ring with the particle swarm optimization.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMB023

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THPMR034

Simulation of Single Particle Dynamics in a Compact Planar Wiggler

simulation, electron, focusing, synchrotron

3458

D.A. Shkitov, A.E. Harisova, Y.N. Sutygina
TPU, Tomsk, Russia

In this report a description of a simple approach how to simulate a single particle track in a 3D magnetic field using Radia code is presented. Such a simulation maybe useful in order to briefly estimate in a short time the beam dynamics in the magnetic field produced by means of different types of the magnet devices. As an example, a low energy relativistic electron tracking* is performed in a compact 30 cm planar wiggler which produced ~0.4 T magnetic field. The changes of the electron entrance point and motion direction are also available. This simulation is carried out using three-dimensional magnetostatic code - Radia**, where the 4th order Runge-Kutta method was implemented for the trajectory calculations. Since Radia is the Mathematica add-on then a small Wolfram Language code is developed to create the wiggler model, to calculate the electron trajectory and to illustrate the simulation results.
* Knyazik A. et al. Status of UCLA helical permanent-magnet undulator // Proc. of PAC, Canada, WE5RFP076 (2009) 2441
** http://www.esrf.eu/Accelerators/Groups/InsertionDevices/Software/Radia

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reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR034

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THPMR049

Minimization of Nonlinear Effects of Insertion Devices at SPS Storage Ring

electron, multipole, storage-ring, insertion

3515

P. Sunwong, P. Klysubun, S. Kongtawong, S. Krainara, T. Pulampong, P. Sudmuang
SLRI, Nakhon Ratchasima, Thailand
T. Pulampong
JAI, Oxford, United Kingdom

Funding: Synchrotron Light Research Institute PO. Box 93 Nakhon Ratchasima 30000 Thailand
Nonlinear effects of insertion devices were studied for the Siam Photon Source (SPS) storage ring. Despite the fact that shimming technique was used to minimize the nonlinear components of magnetic field integral arising from random errors, the nonlinear dynamics effects still remain. It was found that calculated dynamic field integrals are largest in the 2.2 T Hybrid Multipole Wiggler (MPW). Dynamics effects of insertion devices are attributed to the wiggling trajectory of electron in the region of magnetic field roll-off due to finite pole width. For better and more effective operation of the SPS storage ring, multipole components of the dynamic field integral in the MPW have to be further reduced.

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reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR049

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THPMW001

SuperKEKB Main Ring Power Supply System

power-supply, operation, quadrupole, controls

3531

S. Nakamura, T. Adachi, T. Oki, N. Tokuda
KEK, Ibaraki, Japan

The power supplies for magnets of KEKB main ring were recycled into SuperKEKB main ring. Several tests were performed for all of the power supplies to check the soundness. Some of the power supplies were improved to satisfy the requirements of optical design, and some of them were replaced by new power supplies. Most of the trim-coils were arranged with one of power supply per a coil in SuperKEKB. The total number of the power supplies is over 2000.

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reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMW001

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THPOR006

SuperKEKB Main Ring Magnet System

sextupole, dipole, alignment, quadrupole

3778

M. Masuzawa, K. Egawa, H. Iinuma, T. Kawamoto, S. Nakamura, Y. Ohsawa, T. Oki, R. Sugahara, N. Tokuda
KEK, Ibaraki, Japan

SuperKEKB is an electron-positroncollider, which aims to achieve a peak luminosity 40 times higher than that of KEKB by using the so-called 'nano-beam' scheme. A major upgrade to the Main Ring (MR) magnet system was needed to realize this scheme. The upgrade includes 1) new beam lines in the entire interaction region;2) replacement of the main dipole magnets in the positron ring; 3) a new layout of the wiggler sections in the positron ring, and newly added wiggler section in the electron ring, and; 4) sextupole magnets with tunable tilting tables to control the ratio of skew/normal sextupole components in the positron ring. More than 400 magnets were designed, fabricated, field-measured, installed in the tunnel and aligned in time for Phase 1 commissioning. Alignment of the MR magnets was challenging, since the survey network was destroyed by the Great East Japan Earthquake. Tunnel position changes during the magnet alignment work caused by construction of a new facilities building made the alignment work even more challenging. Construction of the MR magnet system and its first commissioning are reported.

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reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOR006

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THPOW036

Evaluation of Immutability against Radiation-induced Demagnetization for a Hybrid Wiggler with NdFeB Magnets at the Canadian Light Source

radiation, electron, injection, operation

4022

C.K. Baribeau, D. Bertwistle, L.O. Dallin, J.M. Vogt, W.A. Wurtz
CLS, Saskatoon, Saskatchewan, Canada

The BioXAS beamline at Canadian Light Source installed a hybrid wiggler in 2013. Quantitative studies building on the experience of other facilities suggest the wiggler's NdFeB magnets are at risk of demagnetization due to radiation induced by the synchrotron's 2.9 GeV electrons. We use a phenomenological model to convert simulated peak demagnetizing fields into a radiation dose corresponding to a chosen %-demagnetization, and compare against an estimated dose per year due to injected beam. We find that injecting with the wiggler closed will cause 1% demagnetization in sections of its magnet blocks within 2 years of operation, assuming a worst case scenario. The wiggler has thus far been forced open for injections, but this will cease to be an option when CLS moves to top-up operation. In a related test, qualitative measurements of radiation during injections with the wiggler closed were taken by covering its magnets in Polaroid film. We find that radiation drops significantly when the injection efficiency is well-tuned. Our results suggest the wiggler will not receive damaging levels of radiation at closed gap so long as the injection system remains optimized.

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reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOW036

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THPOW048

Optimization of a Multipole Wiggler for Tps

photon, electron, radiation, permanent-magnet

4050

J.C. Jan, C.-H. Chang, T.Y. Chung, J.C. Huang, C.-S. Hwang, C.Y. Kuo
NSRRC, Hsinchu, Taiwan

Taiwan Photon Source (TPS) is a synchrotron radia-tion facility with electron energy 3 GeV that was commissioned in 2015. Taiwan Light Source (TLS) with electron energy 1.5 GeV concurrently provides user time. Three beam lines of TLS supply photons of energy 6-18 keV for user experiments; these beam lines are served with an in-achromatic superconduct-ing wiggler (IASW, 3.1 T). This superconducting inser-tion device has the disadvantages of complicated maintenance and operation. A traditional multipole wiggler (MPW) magnet of hybrid type is hence planned to be installed in TPS to cover the range of photon energy of IASW for user experiments. For the design of the magnetic circuit, the side block and the extreme block are arranged surrounding a Permendur Vanadium cobalt steel pole that enhances the field strength and good field region of a MPW magnet. The dynamic integral field and the demagnetizing field of MPW magnet were estimated. The optimization of the pole dimensions and photon characteristics were simu-lated and are discussed in this work.

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reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOW048

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