IBIC2014 - List of Authors (Cheng, W.X.)

Paper	Title	Page
MOIZB1	NSLS2 Diagnostic Systems Commissioning and Measurements	16
	W.X. Cheng, B. Bacha, K. Ha, Y. Hu, M.A. Maggipinto, J. Mead, D. Padrazo, O. Singh, H. Xu BNL, Upton, Long Island, New York, USA
	As the newest and most advanced third generation light source, NSLS2 commissioning has started recently. A total of 50mA stored beam was achieved in the storage ring. Most of the diagnostic systems have been commissioned with beams and proved to be critical to the success of machine commissioning. This paper will present beam commissioning results of various diagnostic systems in the NSLS2 injector and storage ring, including profile monitors, current monitors, and position monitors. We will discuss some preliminary machine measurements as well, such as beam current and lifetime, tune, beam stability, filling pattern etc.
	Slides MOIZB1 [6.187 MB]
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TUPF01	NSLS-II RF Beam Position Monitor- System Test and Integration	289
	D. Padrazo, A. Caracappa, W.X. Cheng, C. Danneil, A.J. Della Penna, K. Ha, M.A. Maggipinto, J. Mead, O. Singh, K. Vetter BNL, Upton, Long Island, New York, USA
	The NSLS-II Synchrotron Light Source is a 3 GeV electron storage ring currently in the early stages of commissioning at Brookhaven National Laboratory. The RF Beam Position Monitors (RF BPM) are one of the key diagnostics systems required for a successful and efficient commissioning. There are more than 250 RF BPM installed in the injector and the storage ring. Each RF BPM was fully tested, first under laboratory environment and then after installation, utilizing built in pilot tone signal source. These successful tests provided a solid base for the integrity of RF BPM systems, prior to the start of beam commissioning. This paper will describe tests performed and results of system integration.
	Poster TUPF01 [1.068 MB]
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TUPF21	NSLS2 Visible Synchrotron Light Monitor Diagnostic Beamline Commissioning	369
	W.X. Cheng, B. Bacha, Y. Hu, O. Singh, H. Xu BNL, Upton, Long Island, New York, USA
	Visible Synchrotron Light Monitor (SLM) beamline has been designed and constructed at NSLS2 storage ring, to characterize the electron beam profile at various machine conditions. Due to carefully alignment, SLM beamline was able to see the first light even before beam circulating the ring. Besides a normal CCD camera to monitor the beam profile, streak camera and gated camera are used to measure the longitudinal and transverse profile to understand the beam dynamics. Measurement results from these cameras will be present in this paper.
	Poster TUPF21 [1.631 MB]
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WECYB2	NSLS-II RF Beam Position Monitor Comissioning Update	500
	J. Mead, A. Caracappa, W.X. Cheng, C. Danneil, J.H. De Long, A.J. Della Penna, K. Ha, B.N. Kosciuk, M.A. Maggipinto, D. Padrazo, B. Podobedov, O. Singh, Y. Tian, K. Vetter BNL, Upton, Long Island, New York, USA
	The National Synchrotron Light Source II (NSLS-II) is a third generation light source currently in the commissioning stage at Brookhaven National Laboratory. The project includes a highly optimized, ultra-low emittance, 3GeV electron storage ring, linac pre-injector and full energy booster synchrotron. Successful commissioning of the booster began in November 2012, followed by the ongoing commissioning of the NSLS-II 3GeV electron storage ring which began in March 2014. With those particles first injected, came a value realization of the in-house developed RF Beam Position Monitor (RF BPM). This in-house design knowledge proved to be extremely valuable to match BPM configurations and requirements quickly when needed with various injected beam conditions. The RF BPM system was envisioned and undertaken to meet or exceed the demanding applications of a third generation light source. This internal R&D project has since matured to become a fully realized diagnostic system with over 250 modules currently operational. Initial BPM performance and applications will be discussed.
	Slides WECYB2 [3.041 MB]
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WEPD27	Commissioning of Bunch-by-Bunch Feedback System for NSLS2 Storage Ring	707
	W.X. Cheng, B. Bacha, Y. Hu, O. Singh, H. Xu BNL, Upton, Long Island, New York, USA D. Teytelman Dimtel, San Jose, USA
	NSLS2 Storage Ring transverse bunch by bunch feedback system has been designed to cure the coupled bunch instabilities, caused by HOM, resistive wall or ions. The system has been constructed, tested and commissioned with beam. Preliminary studies show that the feedback system can suppress single bunch instability. Mode analysis of the unstable coupled bunch motion reveals fast ion instability exist even at relative low current. The bunch by bunch feedback system performance will be presented in this paper.
	Poster WEPD27 [0.623 MB]
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Paper

Title

Page

NSLS2 Diagnostic Systems Commissioning and Measurements

16

W.X. Cheng, B. Bacha, K. Ha, Y. Hu, M.A. Maggipinto, J. Mead, D. Padrazo, O. Singh, H. Xu
BNL, Upton, Long Island, New York, USA

As the newest and most advanced third generation light source, NSLS2 commissioning has started recently. A total of 50mA stored beam was achieved in the storage ring. Most of the diagnostic systems have been commissioned with beams and proved to be critical to the success of machine commissioning. This paper will present beam commissioning results of various diagnostic systems in the NSLS2 injector and storage ring, including profile monitors, current monitors, and position monitors. We will discuss some preliminary machine measurements as well, such as beam current and lifetime, tune, beam stability, filling pattern etc.

Slides MOIZB1 [6.187 MB]

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

TUPF01

NSLS-II RF Beam Position Monitor- System Test and Integration

289

D. Padrazo, A. Caracappa, W.X. Cheng, C. Danneil, A.J. Della Penna, K. Ha, M.A. Maggipinto, J. Mead, O. Singh, K. Vetter
BNL, Upton, Long Island, New York, USA

The NSLS-II Synchrotron Light Source is a 3 GeV electron storage ring currently in the early stages of commissioning at Brookhaven National Laboratory. The RF Beam Position Monitors (RF BPM) are one of the key diagnostics systems required for a successful and efficient commissioning. There are more than 250 RF BPM installed in the injector and the storage ring. Each RF BPM was fully tested, first under laboratory environment and then after installation, utilizing built in pilot tone signal source. These successful tests provided a solid base for the integrity of RF BPM systems, prior to the start of beam commissioning. This paper will describe tests performed and results of system integration.

Poster TUPF01 [1.068 MB]

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

TUPF21

NSLS2 Visible Synchrotron Light Monitor Diagnostic Beamline Commissioning

369

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

Visible Synchrotron Light Monitor (SLM) beamline has been designed and constructed at NSLS2 storage ring, to characterize the electron beam profile at various machine conditions. Due to carefully alignment, SLM beamline was able to see the first light even before beam circulating the ring. Besides a normal CCD camera to monitor the beam profile, streak camera and gated camera are used to measure the longitudinal and transverse profile to understand the beam dynamics. Measurement results from these cameras will be present in this paper.

Poster TUPF21 [1.631 MB]

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

WECYB2

NSLS-II RF Beam Position Monitor Comissioning Update

500

J. Mead, A. Caracappa, W.X. Cheng, C. Danneil, J.H. De Long, A.J. Della Penna, K. Ha, B.N. Kosciuk, M.A. Maggipinto, D. Padrazo, B. Podobedov, O. Singh, Y. Tian, K. Vetter
BNL, Upton, Long Island, New York, USA

The National Synchrotron Light Source II (NSLS-II) is a third generation light source currently in the commissioning stage at Brookhaven National Laboratory. The project includes a highly optimized, ultra-low emittance, 3GeV electron storage ring, linac pre-injector and full energy booster synchrotron. Successful commissioning of the booster began in November 2012, followed by the ongoing commissioning of the NSLS-II 3GeV electron storage ring which began in March 2014. With those particles first injected, came a value realization of the in-house developed RF Beam Position Monitor (RF BPM). This in-house design knowledge proved to be extremely valuable to match BPM configurations and requirements quickly when needed with various injected beam conditions. The RF BPM system was envisioned and undertaken to meet or exceed the demanding applications of a third generation light source. This internal R&D project has since matured to become a fully realized diagnostic system with over 250 modules currently operational. Initial BPM performance and applications will be discussed.

Slides WECYB2 [3.041 MB]

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

WEPD27

Commissioning of Bunch-by-Bunch Feedback System for NSLS2 Storage Ring

707

W.X. Cheng, B. Bacha, Y. Hu, O. Singh, H. Xu
BNL, Upton, Long Island, New York, USA
D. Teytelman
Dimtel, San Jose, USA

NSLS2 Storage Ring transverse bunch by bunch feedback system has been designed to cure the coupled bunch instabilities, caused by HOM, resistive wall or ions. The system has been constructed, tested and commissioned with beam. Preliminary studies show that the feedback system can suppress single bunch instability. Mode analysis of the unstable coupled bunch motion reveals fast ion instability exist even at relative low current. The bunch by bunch feedback system performance will be presented in this paper.

Poster WEPD27 [0.623 MB]

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