IBIC2014 - List of Authors (Flanagan, J.W.)

Paper	Title	Page
TUCZB2	Measurements of Small Vertical Beamsize using a Coded Aperture at Diamond Light Source	279
	C. Bloomer, G. Rehm DLS, Oxfordshire, United Kingdom J.W. Flanagan KEK, Ibaraki, Japan
	Diamond Light Source produces a low emittance 3GeV electron beam which is now regularly operated at 8pm.rad vertical emittance. This corresponds to a vertical beamsize of just 13um in the dipole, which is at a high vertical beta location and routinely used for observing the synchrotron radiation using a pinhole camera. Deconvolution of the images from the pinhole camera to maximise resolution is limited by uncertainly regarding the precise shape of the pinhole, resulting in uncertainty on its computed point spread function. Recently a coded aperture has been installed which offers the potential to improve upon the traditional pinhole measurement by offering both higher resolution and increased flux seen through a larger total aperture, however, at the cost of significantly more complex analysis of the recorded images. A comparison of results obtained using the coded aperture and those achieved using the conventional pinhole is presented.
	Slides TUCZB2 [4.199 MB]
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TUPD22	Beam Loss Monitor at SuperKEKB	459
	H. Ikeda, M. Arinaga, J.W. Flanagan, H. Fukuma, M. Tobiyama KEK, Ibaraki, Japan
	We will use beam loss monitors for protection of the hardware of SuperKEKB against the unexpected sudden beam loss. The sensors are ion chambers and PIN photo-diodes. The loss monitor system gives an important trigger for the beam abort system. We can optimize the threshold of the abort trigger by checking the beam information at each abort moment. This paper explains the overall system of the SuperKEKB beam loss monitors including the damping ring.
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Paper

Title

Page

Measurements of Small Vertical Beamsize using a Coded Aperture at Diamond Light Source

279

C. Bloomer, G. Rehm
DLS, Oxfordshire, United Kingdom
J.W. Flanagan
KEK, Ibaraki, Japan

Diamond Light Source produces a low emittance 3GeV electron beam which is now regularly operated at 8pm.rad vertical emittance. This corresponds to a vertical beamsize of just 13um in the dipole, which is at a high vertical beta location and routinely used for observing the synchrotron radiation using a pinhole camera. Deconvolution of the images from the pinhole camera to maximise resolution is limited by uncertainly regarding the precise shape of the pinhole, resulting in uncertainty on its computed point spread function. Recently a coded aperture has been installed which offers the potential to improve upon the traditional pinhole measurement by offering both higher resolution and increased flux seen through a larger total aperture, however, at the cost of significantly more complex analysis of the recorded images. A comparison of results obtained using the coded aperture and those achieved using the conventional pinhole is presented.

Slides TUCZB2 [4.199 MB]

Export •

reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)

TUPD22

Beam Loss Monitor at SuperKEKB

459

H. Ikeda, M. Arinaga, J.W. Flanagan, H. Fukuma, M. Tobiyama
KEK, Ibaraki, Japan

We will use beam loss monitors for protection of the hardware of SuperKEKB against the unexpected sudden beam loss. The sensors are ion chambers and PIN photo-diodes. The loss monitor system gives an important trigger for the beam abort system. We can optimize the threshold of the abort trigger by checking the beam information at each abort moment. This paper explains the overall system of the SuperKEKB beam loss monitors including the damping ring.

Export •

reference for this paper to ※ LaTeX, ※ Text, ※ IS/RefMan, ※ EndNote (xml)