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Improvement of Fresnel zone plate beam-profile monitor and application to ultralow emittance beam profile measurements

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Title: Improvement of Fresnel zone plate beam-profile monitor and application to ultralow emittance beam profile measurements
Authors: Hiroshi Sakai, Masami Fujisawa, Kensuke Iida, Isao Ito, Hirofumi Kudo, Norio Nakamura, Kenji Shinoe, Takeo Tanaka, Hitoshi Hayano, Masao Kuriki, Toshiya Muto
Source: Physical Review Special Topics. Accelerators and Beams, Vol 10, Iss 4, p 042801 (2007)
Publisher Information: American Physical Society, 2007.
Publication Year: 2007
Collection: LCC:Nuclear and particle physics. Atomic energy. Radioactivity
Subject Terms: Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
More Details: We describe the improvements of a Fresnel zone plate (FZP) beam-profile monitor, which is being developed at the KEK-ATF damping ring to measure ultralow emittance electron-beam profiles. This monitor, which is designed to have a submicrometer spatial resolution, is based on x-ray imaging optics composed of two FZPs. Various improvements were performed to the old setup. First, a new crystal monochromator was introduced to suppress the beam image drift. Second, the two FZP folders were improved in order to realize a precise beam-based alignment during x-ray imaging. Third, a fast mechanical shutter was installed to achieve a shorter time resolution, and an x-ray mask system was also installed to obstruct direct synchrotron radiation through the FZPs. These improvements could make beam-profile measurements more precise and reliable. The beam profiles with less than 50 μm horizontal beam size and less than 6 μm vertical beam size could be measured within a 1 ms time duration. Furthermore, measurements of the damping time and the coupling dependence of the ATF damping ring were successfully carried out with this upgraded FZP monitor.
Document Type: article
File Description: electronic resource
Language: English
ISSN: 1098-4402
Relation: https://doaj.org/toc/1098-4402
DOI: 10.1103/PhysRevSTAB.10.042801
Access URL: https://doaj.org/article/bde5879ee10145a38933ee07265ed296
Accession Number: edsdoj.bde5879ee10145a38933ee07265ed296
Database: Directory of Open Access Journals
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  Data: Improvement of Fresnel zone plate beam-profile monitor and application to ultralow emittance beam profile measurements
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  Data: <searchLink fieldCode="AR" term="%22Hiroshi+Sakai%22">Hiroshi Sakai</searchLink><br /><searchLink fieldCode="AR" term="%22Masami+Fujisawa%22">Masami Fujisawa</searchLink><br /><searchLink fieldCode="AR" term="%22Kensuke+Iida%22">Kensuke Iida</searchLink><br /><searchLink fieldCode="AR" term="%22Isao+Ito%22">Isao Ito</searchLink><br /><searchLink fieldCode="AR" term="%22Hirofumi+Kudo%22">Hirofumi Kudo</searchLink><br /><searchLink fieldCode="AR" term="%22Norio+Nakamura%22">Norio Nakamura</searchLink><br /><searchLink fieldCode="AR" term="%22Kenji+Shinoe%22">Kenji Shinoe</searchLink><br /><searchLink fieldCode="AR" term="%22Takeo+Tanaka%22">Takeo Tanaka</searchLink><br /><searchLink fieldCode="AR" term="%22Hitoshi+Hayano%22">Hitoshi Hayano</searchLink><br /><searchLink fieldCode="AR" term="%22Masao+Kuriki%22">Masao Kuriki</searchLink><br /><searchLink fieldCode="AR" term="%22Toshiya+Muto%22">Toshiya Muto</searchLink>
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  Data: Physical Review Special Topics. Accelerators and Beams, Vol 10, Iss 4, p 042801 (2007)
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  Data: American Physical Society, 2007.
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  Data: We describe the improvements of a Fresnel zone plate (FZP) beam-profile monitor, which is being developed at the KEK-ATF damping ring to measure ultralow emittance electron-beam profiles. This monitor, which is designed to have a submicrometer spatial resolution, is based on x-ray imaging optics composed of two FZPs. Various improvements were performed to the old setup. First, a new crystal monochromator was introduced to suppress the beam image drift. Second, the two FZP folders were improved in order to realize a precise beam-based alignment during x-ray imaging. Third, a fast mechanical shutter was installed to achieve a shorter time resolution, and an x-ray mask system was also installed to obstruct direct synchrotron radiation through the FZPs. These improvements could make beam-profile measurements more precise and reliable. The beam profiles with less than 50 μm horizontal beam size and less than 6 μm vertical beam size could be measured within a 1 ms time duration. Furthermore, measurements of the damping time and the coupling dependence of the ATF damping ring were successfully carried out with this upgraded FZP monitor.
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  Data: 10.1103/PhysRevSTAB.10.042801
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