BIW2012 - List of Authors (Cheng, W.X.)

Paper	Title	Page
MOPG022	NSLS2 Beam Position Monitor Calibration	77
	W.X. Cheng, B. Bacha, O. Singh BNL, Upton, Long Island, New York, USA
	To get accurate beam position measurements along the accelerator complex, beam position monitor (BPM) sensitivity and electric offset need to be calibrated. A good calibration is essential for day one commissioning and large beam offset measurements. For various type of BPMs used in NSLS2, the sensitivity curves were calculated and fitting by high order polynomial fit. Fitting errors are typically less than 50um. BPM electric offsets are measured using four port network analyzer. These offset values will supply a good reference for beam based alignment.

Paper

Title

Page

NSLS2 Beam Position Monitor Calibration

77

W.X. Cheng, B. Bacha, O. Singh
BNL, Upton, Long Island, New York, USA

To get accurate beam position measurements along the accelerator complex, beam position monitor (BPM) sensitivity and electric offset need to be calibrated. A good calibration is essential for day one commissioning and large beam offset measurements. For various type of BPMs used in NSLS2, the sensitivity curves were calculated and fitting by high order polynomial fit. Fitting errors are typically less than 50um. BPM electric offsets are measured using four port network analyzer. These offset values will supply a good reference for beam based alignment.