2011 Particle Accelerator Conference - List of Authors (Vetter, K.)

Paper	Title	Page
MOP192	NSLS-II BPM System Protection from Rogue Mode Coupling	450
	A. Blednykh, B. Bacha, A. Borrelli, M.J. Ferreira, C. Hetzel, H.-C. Hseuh, B.N. Kosciuk, S. Krinsky, O. Singh, K. Vetter BNL, Upton, Long Island, New York, USA
	Funding: Work supported by DOE contract DE-AC02-98CH10886 Rogue mode RF shielding has been successfully designed and implemented into the production multipole vacuum chambers. In order to avoid systematic errors in the NSLS-II BPM system we introduced frequency shift of HOM's by using RF metal shielding located in the antechamber slot of each multipole vacuum chamber. To satisfy the pumping requirement the face of the shielding has been perforated with roughly 50 percent transparency. It stays clear of synchrotron radiation in each chamber.

MOP198	BPM Inputs to Physics Applications at NSLS-II	465
	Y. Hu, L.R. Dalesio, J.H. DeLong, K. Ha, J. Mead, I. Pinayev, G. Shen, O. Singh, Y. Tian, K. Vetter, L.-H. Yu BNL, Upton, Long Island, New York, USA
	A new BPM (Beam Position Monitor) electronics is under development and in good progress at NSLS-II. This in-house BPM receiver with many new features is comparable to commercial solution. BPM data for fast orbit feedback (FOFB) is one of the most important physics applications. The procedure to use BPM for FOFB is introduced firstly. Then, different BPM data flows associated with different physics requirements and applications are discussed. And control implementation of BPM system for physics applications is presented.

MOP211	NSLS-II RF Beam Position Monitor	495
	K. Vetter, J.H. DeLong, A.J. Della Penna, K.M. Ha, Y. Hu, B.N. Kosciuk, J. Mead, I. Pinayev, O. Singh, Y. Tian BNL, Upton, Long Island, New York, USA G.J. Portmann LBNL, Berkeley, California, USA J.J. Sebek SLAC, Menlo Park, California, USA
	Funding: Work supported by the U.S. DOE under contract No. DE-AC02-98CH10886. An internal R&D program has been undertaken at BNL to develop a sub-micron RF Beam Position Monitor (BPM) for the NSLS-II 3rd generation light source that is currently under construction. The BPM R&D program started in August 2009. Successful beam tests were conducted 15 months from the start of the program. The NSLS-II RF BPM has been designed to meet all requirements for the NSLS-II Injection system and Storage Ring. Housing of the RF BPMs in ±0.1C thermally controlled racks provide sub-micron stabilization without active correction. An active pilot-tone has been incorporated to aid long-term (8hr min) stabilization to 200nm RMS.

Paper

Title

Page

NSLS-II BPM System Protection from Rogue Mode Coupling

450

A. Blednykh, B. Bacha, A. Borrelli, M.J. Ferreira, C. Hetzel, H.-C. Hseuh, B.N. Kosciuk, S. Krinsky, O. Singh, K. Vetter
BNL, Upton, Long Island, New York, USA

Funding: Work supported by DOE contract DE-AC02-98CH10886
Rogue mode RF shielding has been successfully designed and implemented into the production multipole vacuum chambers. In order to avoid systematic errors in the NSLS-II BPM system we introduced frequency shift of HOM's by using RF metal shielding located in the antechamber slot of each multipole vacuum chamber. To satisfy the pumping requirement the face of the shielding has been perforated with roughly 50 percent transparency. It stays clear of synchrotron radiation in each chamber.

MOP198

BPM Inputs to Physics Applications at NSLS-II

465

Y. Hu, L.R. Dalesio, J.H. DeLong, K. Ha, J. Mead, I. Pinayev, G. Shen, O. Singh, Y. Tian, K. Vetter, L.-H. Yu
BNL, Upton, Long Island, New York, USA

A new BPM (Beam Position Monitor) electronics is under development and in good progress at NSLS-II. This in-house BPM receiver with many new features is comparable to commercial solution. BPM data for fast orbit feedback (FOFB) is one of the most important physics applications. The procedure to use BPM for FOFB is introduced firstly. Then, different BPM data flows associated with different physics requirements and applications are discussed. And control implementation of BPM system for physics applications is presented.

MOP211

NSLS-II RF Beam Position Monitor

495

K. Vetter, J.H. DeLong, A.J. Della Penna, K.M. Ha, Y. Hu, B.N. Kosciuk, J. Mead, I. Pinayev, O. Singh, Y. Tian
BNL, Upton, Long Island, New York, USA
G.J. Portmann
LBNL, Berkeley, California, USA
J.J. Sebek
SLAC, Menlo Park, California, USA

Funding: Work supported by the U.S. DOE under contract No. DE-AC02-98CH10886.
An internal R&D program has been undertaken at BNL to develop a sub-micron RF Beam Position Monitor (BPM) for the NSLS-II 3rd generation light source that is currently under construction. The BPM R&D program started in August 2009. Successful beam tests were conducted 15 months from the start of the program. The NSLS-II RF BPM has been designed to meet all requirements for the NSLS-II Injection system and Storage Ring. Housing of the RF BPMs in ±0.1C thermally controlled racks provide sub-micron stabilization without active correction. An active pilot-tone has been incorporated to aid long-term (8hr min) stabilization to 200nm RMS.