IBIC2019 - List of Keywords (undulator)

Paper	Title	Other Keywords	Page
MOPP020	First Tests Using Sipm Based Beam Loss Monitors at the European XFEL	FEL, detector, photon, radiation	127
	T. Wamsat, P.A. Smirnov DESY, Hamburg, Germany
	The European XFEL MTCA based Beam Loss Monitor System (BLM) is composed of about 450 monitors using photomultiplier tubes (PMTs). BLMs installed in the SASE undulator intersections show high signals at electron energy higher 16 GeV or photon energy higher 14 keV due to background synchrotron radiation which directly affects the PMT. The amplitude of this signal can get that high that, also without using any scintillating material, the BLMs get blind for real losses. Also different lead arrangements did not shield the signal sufficiently. First tests show that a Silicon photomultiplier (SiPM) is not affected. Also there are several advantages to use SiPM, they are cheaper by factor of 40 and operating voltage is below 45V. First test will be presented and how it can get implemented in the existing BLMs and BLM system.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP020
About •	paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPP031	Electron Beam Size Measurements Using the Heterodyne Near Field Speckles at ALBA	radiation, experiment, synchrotron, synchrotron-radiation	383
	M. Siano, M.A.C. Potenza Universita’ degli Studi di Milano & INFN, Milano, Italy U. Iriso, C.S. Kamma-Lorger, A.A. Nosych ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain S. Mazzoni, G. Trad CERN, Geneva, Switzerland B. Paroli Universita’ degli Studi di Milano, Milano, Italy
	Experiments using the heterodyne near field speckle method (HNFS) have been performed at ALBA to characterize the spatial coherence of the synchrotron radiation, with the ultimate goal of measuring both the horizontal and vertical electron beam sizes. The HNFS technique consists on the analysis of the interference between the radiation scattered by a colloidal suspension of nanoparticles and the synchrotron radiation, which in this case corresponds to the hard x-rays (12keV) produced by the in-vacuum undulator of the NCD-Sweet beamline. This paper describes the fundamentals of the technique, possible limitations, and shows the first experimental results changing the beam coupling of the storage ring.
	Poster TUPP031 [2.093 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP031
About •	paper received ※ 06 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THAO04	Transverse Emittance Measurement using Undulator High Harmonics for Diffraction Limited Storage Rings	emittance, radiation, simulation, electron	674
	K.P. Wootton, J.L. McChesney, F.M. Rodolakis, N. Sereno, B.X. Yang ANL, Lemont, Illinois, USA
	Funding: This research used resources of the Advanced Photon Source, operated for the U.S Department of Energy Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. A particular challenge for diagnostics in diffraction limited storage ring light sources is the measurement of electron beam transverse emittances. In the present work, we present measurements and simulations of vertical electron beam emittance using high harmonics from an electromagnetic undulator in the present Advanced Photon Source storage ring. Based on these results, using simulation we motivate an undulator-based horizontal and vertical transverse emittance monitor for diffraction limited storage rings, using the Advanced Photon Source Upgrade as an example.
	Slides THAO04 [2.655 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-THAO04
About •	paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPP020

First Tests Using Sipm Based Beam Loss Monitors at the European XFEL

FEL, detector, photon, radiation

127

T. Wamsat, P.A. Smirnov
DESY, Hamburg, Germany

The European XFEL MTCA based Beam Loss Monitor System (BLM) is composed of about 450 monitors using photomultiplier tubes (PMTs). BLMs installed in the SASE undulator intersections show high signals at electron energy higher 16 GeV or photon energy higher 14 keV due to background synchrotron radiation which directly affects the PMT. The amplitude of this signal can get that high that, also without using any scintillating material, the BLMs get blind for real losses. Also different lead arrangements did not shield the signal sufficiently. First tests show that a Silicon photomultiplier (SiPM) is not affected. Also there are several advantages to use SiPM, they are cheaper by factor of 40 and operating voltage is below 45V. First test will be presented and how it can get implemented in the existing BLMs and BLM system.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOPP020

About •

paper received ※ 04 September 2019 paper accepted ※ 08 September 2019 issue date ※ 10 November 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPP031

Electron Beam Size Measurements Using the Heterodyne Near Field Speckles at ALBA

radiation, experiment, synchrotron, synchrotron-radiation

383

M. Siano, M.A.C. Potenza
Universita’ degli Studi di Milano & INFN, Milano, Italy
U. Iriso, C.S. Kamma-Lorger, A.A. Nosych
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
S. Mazzoni, G. Trad
CERN, Geneva, Switzerland
B. Paroli
Universita’ degli Studi di Milano, Milano, Italy

Experiments using the heterodyne near field speckle method (HNFS) have been performed at ALBA to characterize the spatial coherence of the synchrotron radiation, with the ultimate goal of measuring both the horizontal and vertical electron beam sizes. The HNFS technique consists on the analysis of the interference between the radiation scattered by a colloidal suspension of nanoparticles and the synchrotron radiation, which in this case corresponds to the hard x-rays (12keV) produced by the in-vacuum undulator of the NCD-Sweet beamline. This paper describes the fundamentals of the technique, possible limitations, and shows the first experimental results changing the beam coupling of the storage ring.

Poster TUPP031 [2.093 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP031

About •

paper received ※ 06 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THAO04

Transverse Emittance Measurement using Undulator High Harmonics for Diffraction Limited Storage Rings

emittance, radiation, simulation, electron

674

K.P. Wootton, J.L. McChesney, F.M. Rodolakis, N. Sereno, B.X. Yang
ANL, Lemont, Illinois, USA

Funding: This research used resources of the Advanced Photon Source, operated for the U.S Department of Energy Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
A particular challenge for diagnostics in diffraction limited storage ring light sources is the measurement of electron beam transverse emittances. In the present work, we present measurements and simulations of vertical electron beam emittance using high harmonics from an electromagnetic undulator in the present Advanced Photon Source storage ring. Based on these results, using simulation we motivate an undulator-based horizontal and vertical transverse emittance monitor for diffraction limited storage rings, using the Advanced Photon Source Upgrade as an example.

Slides THAO04 [2.655 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-THAO04

About •

paper received ※ 04 September 2019 paper accepted ※ 10 September 2019 issue date ※ 10 November 2019

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)