CASPER- A magnetic measurement facility for superconducting undulators

Mashkina, Elena; Grau, Andreas; Schneider, T.; Bernhard, Axel; Casalbuoni, S.; Hagelstein, M.; Kostka, B.; Rossmanith, R.; Steffens, E.; Wollmann, Daniel; Baumbach, Tilo

doi:10.1088/1742-6596/97/1/012020

Cited by 10 publications

(12 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At CASPERI (Characterisation Setup for Phase Error Reduction, see Sect. 5.1) [11] we demonstrated the feasibility of period length switching using a 9 pole mock-up designed and manufactured by BNG and showed that there is no need to train the magnet again after each switch [10].…”

Section: Superconducting Undulator Wigglermentioning

confidence: 89%

See 1 more Smart Citation

Status of the development of superconducting undulators at ANKA

Casalbuoni

Baumbach

Gerstl

et al. 2013

J. Phys.: Conf. Ser.

Self Cite

View full text Add to dashboard Cite

Section: Superconducting Undulator Wigglermentioning

confidence: 89%

“…CASPER I is an operating vertical cryostat in which coils with maximum dimensions of 35 cm length and 30 cm diameter can be immersed in liquid helium for testing [11]. The magnetic field along the beam axis is measured by Hall probes fixed to a sledge and moved by a linear stage.…”

Section: Magnetic Field Characterizationmentioning

confidence: 99%

Status of the development of superconducting undulators at ANKA

Casalbuoni

Baumbach

Gerstl

et al. 2013

J. Phys.: Conf. Ser.

Self Cite

View full text Add to dashboard Cite

“…4. The field was measured in a helium bath cryostat-CASPER I-a field measuring device for short superconductive undulators described in detail in [9]. The result of the measurements is shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…As stated in [9], the calibrated Hall probe has an accuracy of 0.1 mT. The spatial resolution of the measurement equipment is 3 m and the repeatability is also about 3 m. The latter was achieved by repeated measurements of a well-known undulator field, which included temperature cycling.…”

Section: Methodsmentioning

confidence: 99%

Experimental demonstration of the induction-shimming concept in superconductive undulators

Wollmann

Bernhard

Peiffer

et al. 2009

Phys. Rev. ST Accel. Beams

View full text Add to dashboard Cite

In an undulator, magnetic field errors limit the quality of the emitted photon beam. In an ideal undulator, the sinusoidal motion of the electron beam and the emitted photons are in phase along the whole trajectory. Small variations in the magnetic field from period to period can produce phase errors and have to be corrected. This procedure is called shimming. Recently, a new scheme for superconductive undulators based on Faraday's law of induction in a type-II superconductor was proposed in which these errors are automatically minimized. The field errors create currents and therefore magnetic fields in an array of coupled high temperature superconductor loops which minimize the field errors. In this paper the first experimental results of a test of this new concept are described.

show abstract

“…The main components of the magnetic measurement test station CASPER (Characterization Set-up for Field Error Reduction) installed at the synchrotron light source ANKA [8] are shown in Fig. 1.…”

Section: Methodsmentioning

confidence: 99%

Test of an Electromagnetic Shimming Concept for Superconducting Undulators

Mashkina

Grau

Boffo³

et al. 2009

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

Accurate magnetic field measurements are a prerequisite for the characterization and optimization of undulators. At the synchrotron light source ANKA there is an ongoing R&D program for superconducting insertion devices. Within this program a test stand for precise magnetic field measurements of superconductive coils was designed, built and installed at the Research Center Karlsruhe.Comprehensive magnetic measurements are performed to confirm the magnet design and to detect or correct field imperfections resulting from the manufacturing process. The magnetic field is measured along a fixed direction by Hall probes with a positioning precision of 3 m. A NbTi undulator prototype with local correction coils was built to verify the performance of the superconductor and the shimming concept.In this contribution we describe the measuring test station and preliminary tests results including the efficiency of the shimming concept.

show abstract

CASPER- A magnetic measurement facility for superconducting undulators

Cited by 10 publications

References 2 publications

Status of the development of superconducting undulators at ANKA

Status of the development of superconducting undulators at ANKA

Experimental demonstration of the induction-shimming concept in superconductive undulators

Test of an Electromagnetic Shimming Concept for Superconducting Undulators

Contact Info

Product

Resources

About