IPAC2012 - List of Authors (Fiorito, R.B.)

Paper

Title

Page

Injected Beam Imaging at SPEAR 3 with a Digital Optic Mask

2116

H.D. Zhang, R.B. Fiorito, A.G. Shkvarunets
UMD, College Park, Maryland, USA
W.J. Corbett, A.S. Fisher, K. Tian
SLAC, Menlo Park, California, USA

Funding: *This work is partially funded by the Office of Naval Research and the DOD Joint Technology Office.
At SPEAR3, the light source operates in top-up injection mode with 273nC charge circulating in the storage ring (350mA). Each individual injection pulse contains only 40pC, or a contrast ration of 1:6800. In order to monitor injected beam dynamics during User operations, it is desirable to optically image the injected charge distribution on a turn-by-turn basis in the presence of the bright stored beam. The measurement is made by re-imaging visible synchrotron radiation onto a 1024x768 pixel Digital-Micro-Array mirror device (DMD) which is used to 'mask' light from the central stored beam while observing the weak injected beam signal on an intensified, fast-gated CCD camera. Complex beam dynamics are observed after only a few 10's of turns around the synchrotron. In this paper we report on the DMD optical configuration, masking considerations, measurement timing and initial tests imaging the injected beam in the presence of stored beam.

Slides WEOAA01 [1.874 MB]

Paper	Title	Page
WEOAA01	Injected Beam Imaging at SPEAR 3 with a Digital Optic Mask	2116
	H.D. Zhang, R.B. Fiorito, A.G. Shkvarunets UMD, College Park, Maryland, USA W.J. Corbett, A.S. Fisher, K. Tian SLAC, Menlo Park, California, USA
	Funding: *This work is partially funded by the Office of Naval Research and the DOD Joint Technology Office. At SPEAR3, the light source operates in top-up injection mode with 273nC charge circulating in the storage ring (350mA). Each individual injection pulse contains only 40pC, or a contrast ration of 1:6800. In order to monitor injected beam dynamics during User operations, it is desirable to optically image the injected charge distribution on a turn-by-turn basis in the presence of the bright stored beam. The measurement is made by re-imaging visible synchrotron radiation onto a 1024x768 pixel Digital-Micro-Array mirror device (DMD) which is used to 'mask' light from the central stored beam while observing the weak injected beam signal on an intensified, fast-gated CCD camera. Complex beam dynamics are observed after only a few 10's of turns around the synchrotron. In this paper we report on the DMD optical configuration, masking considerations, measurement timing and initial tests imaging the injected beam in the presence of stored beam.
	Slides WEOAA01 [1.874 MB]