Contribution to a conference proceedings/Contribution to a book

PUBDB-2015-00051

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Radiation Damage of Undulators at PETRA III

Vagin, P. (Corresponding Author)DESY* ; Bilani, O.DESY* ; Schoeps, A.DESY* ; Tripathi, S.>Extern* ; Vielitz, T.DESY* ; Tischer, M.DESY*

2014
JACoW, Geneva, Switzerland Geneva
ISBN: 978-3-95450-132-8

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Please use a persistent id in citations: doi:10.18429/JACoW-IPAC2014-WEPRO035  doi:10.3204/PUBDB-2015-00051

Abstract: In the new octant of PETRA III, there are 14 undulator beamlines covering photon energy range from 0.3keV to 150keV. There are also 80m of damping wigglers in order to achieve a low emittance of 1nmrad. Some of these devices, operating at PETRAIII since 2008, accumulated totalradiation doses of about 100kGy.Visible corrosion at the magnet structures of some permanent magnet undulators setting in after a few years and a high dose rate measured regularly by thermoluminescent dosimeters (TLDs) gave reason to inspect the magnetic field of all insertion devices in the PETRA tunnel. This paper presents details of the magnetic field degradation caused byradiation damage to the undulator magnets. For some undulators changes in the spectral properties of the generated light were observed. It was measured with different taper settingsin order to partly compensate the nonuniform demagnetization along the structure. The results are compared with the data from the sFLASH undulators and measurements of special 3 pole "sacrificial" undulator, installed in FLASH. Its magnetic field is periodically remeasured and shows field amplitude decrease of 1% per 16kGy accumulated dose.

Keyword(s): Accelerator Physics ; 02 Synchrotron Light Sources and FELs ; T15 Undulators and Wigglers

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Contributing Institute(s):

1. FS-Undulator Systeme (FS-US)

Research Program(s):

1. 6G3 - PETRA III (POF3-622) (POF3-622)

Experiment(s):

1. Facility (machine) PETRA III

Appears in the scientific report 2014

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Proceedings Petit-Jean-Genaz, C. (Editor) ; Arduini, G. (Editor) ; Michel, P. (Editor) ; Schaa, V. R. W. (Editor)
Particle accelerator: Proceedings, 5th international conference, IPAC 2014, Dresden, Germany, June 15-20, 2014
20145th International Particle Accelerator Conference, IPAC 2014, DresdenDresden, Germany, 16 Jun 2013 - 20 Jun 20142013-06-162014-06-20 Geneva : JACoW, JACoW conferences 4078 p (2014)2014     full text BibTeX | EndNote: XML, Text | RIS

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