IBIC2016 - List of Keywords (PLC)

Paper	Title	Other Keywords	Page
TUPG37	A PPS Compliant Injected Charge Monitor at NSLS-II	timing, linac, operation, monitoring	422
	A. Caracappa, C. Danneil, R.P. Fliller, D. Padrazo, O. Singh BNL, Upton, Long Island, New York, USA
	Part of the NSLS-II Personnel Protection System (PPS), the Accumulated Charge Monitor Interlock (ACMI) was developed to ensure the Accelerator Safety Envelope (ASE) limits for charge generation in the NSLS-II Injector are never violated. The ACMI measures the amount of charge in each injection shot using an Integrating Current Transformer (ICT). For logistical reasons, adding a redundant ICT was impractical so in order to achieve the high reliability required for PPS this system is designed to perform self-tests by injecting calibrated charge pulses into a test coil on the ICT and analyzing the returning charge signal. The injector trigger rate is 1.97Hz and self-tests are performed 250 mSec after every trigger pulse. Despite the lack of a redundant charge measurement the ACMI achieved the high reliability rating required for PPS with a mean time between failure (MTBF) rate greater than 10⁶ hours. The ACMI was commissioned in 2014 and has operated to date without any major problems. In 2015 a second ACMI system was commissioned at another location in the injection system.
	Poster TUPG37 [2.212 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG37
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPG38	A PPS Compliant Stored Beam Current Monitor at NSLS-II	operation, storage-ring, monitoring, diagnostics	426
	A. Caracappa, C. Danneil, A.J. Della Penna, R.P. Fliller, D. Padrazo, O. Singh BNL, Upton, Long Island, New York, USA
	A requirement for top-off operations at the NSLS-II facility is at least 50mA stored ring current. The Stored Beam Current Monitor (SBCM) is part of the NSLS-II Personnel Protection System (PPS) that determines the storage ring current based on Pick-Up Electrode (PUE) readings. The SBCM selects the 500 MHz component of the PUE signal and downconverts it to about 2 MHz. The 2 MHz signal is rectified, averaged down to a bandwidth of 500 Hz, and compared to a threshold voltage equivalent to 55mA of stored beam. A redundant SBCM system was also constructed and these two systems must agree that the stored beam is above the threshold to enable top-off operations. The SBCM is also required to remain accurate over wide range of possible bunch patterns and bunch intensity distributions. Under normal conditions for top-off operations the SBCM measurement accuracy is about 1%. The SBCM was commissioned in 2015 as part of the Top-Off Safety System (TOSS) which is responsible for ensuring safe top-off operations at NSLS-II.
	Poster TUPG38 [2.834 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG38
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUPG37

A PPS Compliant Injected Charge Monitor at NSLS-II

timing, linac, operation, monitoring

422

A. Caracappa, C. Danneil, R.P. Fliller, D. Padrazo, O. Singh
BNL, Upton, Long Island, New York, USA

Part of the NSLS-II Personnel Protection System (PPS), the Accumulated Charge Monitor Interlock (ACMI) was developed to ensure the Accelerator Safety Envelope (ASE) limits for charge generation in the NSLS-II Injector are never violated. The ACMI measures the amount of charge in each injection shot using an Integrating Current Transformer (ICT). For logistical reasons, adding a redundant ICT was impractical so in order to achieve the high reliability required for PPS this system is designed to perform self-tests by injecting calibrated charge pulses into a test coil on the ICT and analyzing the returning charge signal. The injector trigger rate is 1.97Hz and self-tests are performed 250 mSec after every trigger pulse. Despite the lack of a redundant charge measurement the ACMI achieved the high reliability rating required for PPS with a mean time between failure (MTBF) rate greater than 10⁶ hours. The ACMI was commissioned in 2014 and has operated to date without any major problems. In 2015 a second ACMI system was commissioned at another location in the injection system.

Poster TUPG37 [2.212 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG37

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPG38

A PPS Compliant Stored Beam Current Monitor at NSLS-II

operation, storage-ring, monitoring, diagnostics

426

A. Caracappa, C. Danneil, A.J. Della Penna, R.P. Fliller, D. Padrazo, O. Singh
BNL, Upton, Long Island, New York, USA

A requirement for top-off operations at the NSLS-II facility is at least 50mA stored ring current. The Stored Beam Current Monitor (SBCM) is part of the NSLS-II Personnel Protection System (PPS) that determines the storage ring current based on Pick-Up Electrode (PUE) readings. The SBCM selects the 500 MHz component of the PUE signal and downconverts it to about 2 MHz. The 2 MHz signal is rectified, averaged down to a bandwidth of 500 Hz, and compared to a threshold voltage equivalent to 55mA of stored beam. A redundant SBCM system was also constructed and these two systems must agree that the stored beam is above the threshold to enable top-off operations. The SBCM is also required to remain accurate over wide range of possible bunch patterns and bunch intensity distributions. Under normal conditions for top-off operations the SBCM measurement accuracy is about 1%. The SBCM was commissioned in 2015 as part of the Top-Off Safety System (TOSS) which is responsible for ensuring safe top-off operations at NSLS-II.

Poster TUPG38 [2.834 MB]

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IBIC2016-TUPG38

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)