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Title: Overview of the superconducting undulator development program at ANKA

Abstract

Superconducting undulators (SCUs) have the potential to reach higher brilliance and flux with respect to the state of the art permanent magnet insertion devices. ANKA is collaborating with the industrial partner Babcock Noell GmbH (BNG) to realize NbTi conduction cooled planar devices for low emittance light sources, and is developing the instrumentation to characterize the magnetic field properties and to measure the beam heat load to a cold bore needed for the cryogenic design of SCUs. We present here: the most recent results obtained within the ANKA-BNG collaboration, the progress achieved in the development of the instrumentation, and the in house studies on the application of high temperature superconducting (HTS) tape to the SCU technology.

Authors:
; ; ; ; ; ; ; ;  [1]; ; ; ;  [2]
  1. ANKA, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen (Germany)
  2. Babcock Noell GmbH, Alfred Nobel Str. 20, 97080 Würzburg (Germany)
Publication Date:
OSTI Identifier:
22608298
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1741; Journal Issue: 1; Conference: SRI2015: 12. international conference on synchrotron radiation instrumentation, New York, NY (United States), 6-10 Jul 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAMS; HIGH-TC SUPERCONDUCTORS; MAGNETIC FIELDS; PERMANENT MAGNETS; SUPERCONDUCTING DEVICES; WIGGLER MAGNETS

Citation Formats

Casalbuoni, S., E-mail: sara.casalbuoni@kit.edu, Cecilia, A., Gerstl, S., Glamann, N., Grau, A., Holubek, T., Meuter, C., Saez de Jauregui, D., Voutta, R., Boffo, C., Gerhard, Th., Turenne, M., and Walter, W.. Overview of the superconducting undulator development program at ANKA. United States: N. p., 2016. Web. doi:10.1063/1.4952781.
Casalbuoni, S., E-mail: sara.casalbuoni@kit.edu, Cecilia, A., Gerstl, S., Glamann, N., Grau, A., Holubek, T., Meuter, C., Saez de Jauregui, D., Voutta, R., Boffo, C., Gerhard, Th., Turenne, M., & Walter, W.. Overview of the superconducting undulator development program at ANKA. United States. doi:10.1063/1.4952781.
Casalbuoni, S., E-mail: sara.casalbuoni@kit.edu, Cecilia, A., Gerstl, S., Glamann, N., Grau, A., Holubek, T., Meuter, C., Saez de Jauregui, D., Voutta, R., Boffo, C., Gerhard, Th., Turenne, M., and Walter, W.. 2016. "Overview of the superconducting undulator development program at ANKA". United States. doi:10.1063/1.4952781.
@article{osti_22608298,
title = {Overview of the superconducting undulator development program at ANKA},
author = {Casalbuoni, S., E-mail: sara.casalbuoni@kit.edu and Cecilia, A. and Gerstl, S. and Glamann, N. and Grau, A. and Holubek, T. and Meuter, C. and Saez de Jauregui, D. and Voutta, R. and Boffo, C. and Gerhard, Th. and Turenne, M. and Walter, W.},
abstractNote = {Superconducting undulators (SCUs) have the potential to reach higher brilliance and flux with respect to the state of the art permanent magnet insertion devices. ANKA is collaborating with the industrial partner Babcock Noell GmbH (BNG) to realize NbTi conduction cooled planar devices for low emittance light sources, and is developing the instrumentation to characterize the magnetic field properties and to measure the beam heat load to a cold bore needed for the cryogenic design of SCUs. We present here: the most recent results obtained within the ANKA-BNG collaboration, the progress achieved in the development of the instrumentation, and the in house studies on the application of high temperature superconducting (HTS) tape to the SCU technology.},
doi = {10.1063/1.4952781},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1741,
place = {United States},
year = 2016,
month = 7
}
  • Superconducting undulators show a larger magnetic field strength for the same gap and period length, as compared to permanent magnet devices, which allows to generate X-ray beams of higher brilliance and with harder spectrum. The worldwide first short period length superconducting undulator is in operation since 2005 at the synchrotron light source ANKA in Karlsruhe [1]. To further drive the development in this field a research and development program is being carried out. In this contribution we report on the last progress of the construction of a 1.5 m long superconducting undulator with a period length of 15 mm, plannedmore » to be installed in ANKA beginning 2010 to be the light source of the new beamline NANO for high resolution X-ray scattering. The key specifications of the system are an undulator parameter K higher than 2 (with a magnetic gap of 5 mm) and a phase error smaller than 3.5 degrees. Cryocoolers will keep the coils at 4.2 K for a beam heat load of 4 W. The ongoing R and D includes improvements in understanding of the magnetic field properties and of the beam heat load mechanisms. The tools and instruments under development to fulfill these tasks are also discussed.« less
  • A beam test of a superconductive undulator (100 periods, 14 mm period length) is in preparation at the 2.5 GeV storage ring ANKA in Karlsruhe. The aim of this test is to study the behaviour of a cold-bore superconductive undulator in a storage ring (study of the influence of the beam induced heating and heating by synchrotron radiation from downstream magnets) and to conduct an analysis of the quality of the emitted spectrum. A coil at the entrance and a single superconductive dipole correction coil covering the whole undulator is provided to minimize the first and second integral. A sectionmore » of this paper is devoted to the discussion of a more elaborate correction system for future undulators.« less
  • In spring 2005 the worldwide first cold-bore superconductive undulator was installed in the storage ring ANKA. In this paper the obtained results concerning the measured spectra and the heat load from the beam are described. Future developments in the field on superconductive undulators at ANKA are summarized.
  • Several theoretical papers tried to estimate the magnitude of the different possible effects heating a cold-bore small gap undulator: synchrotron radiation from upstream magnets, image currents and synchrotron radiation produced in the undulator. Measurements performed with the superconducting undulator installed in ANKA show that the dominating heating mechanism is diffuse synchrotron radiation generated in the upstream magnets: about 1 W/ 100 mA stored current at 2.5 GeV at a gap height of 8 mm. This rather low level can presumably be reduced further by modifying the collimating system at the entrance of the undulator.
  • Japanese activities on development of superconducting generator are reviewed with a brief historical description. Japanese development program has demonstrated the technical feasibility of superconducting machine by construction and operation of model machines. The experiences in manufacturing and operating such machines have been accumulated to have sufficient potential for realization of practical superconducting generators. At present, although a definite next program is not clear, there is a trend advancing the development of practical superconducting generators.