BIW2012 - List of Authors (Kramer, S.L.)

Paper	Title	Page
MOPG005	Controls and Data Acquisition for NSLS-II Loss Control and Monitoring	29
	Y. Hu, P. Cameron, D. Chabot, L.R. Dalesio, S.L. Kramer BNL, Upton, Long Island, New York, USA
	The NSLS-II Loss Control and Monitoring (LCM) system is safety-related, but not safety-credited. This definition and requirement makes implementation requirements of controls and data acquisition (DAQ) for the LCM less stringent. However, the LCM is one of the most complicated diagnostics subsystems since it involves so many components including beam intensity monitors, scrapers, and different types of beam loss monitors, and the component interacts with each other. The control & DAQ system design and prototype test results are presented.

THBP03	Cherenkov Radiation for Beam Loss Monitor Systems	272
	S.L. Kramer BNL, Upton, Long Island, New York, USA
	Funding: Work supported by U.S. DOE, Contract No.DE-AC02-98CH10886 Cherenkov radiation has been used by high energy physics to identify the mass of single particles for quite some time. Quartz fiber optics has been used to detect beam loss locations for pulsed electron beams using the time of propagation within the fiber of the light pulse. For the NSLS-II storage ring, it was necessary to detect the amount of charge lost versus location around the ring. To achieve this for a continuously circulating beam, the best solution was found to be large diameter, solid fused silica Cherenkov radiator rods which localized the beam loss to a unit of one magnet girder, which usually corresponds to one peak of transverse beam size or dispersion and therefore one loss point of interest. This paper presents an analysis of the use of Cherenkov radiation as a signal for beam loss, together with a comparison of the advantages and disadvantages of fiber optic cable and solid rod radiators for beam loss monitoring.

Paper

Title

Page

Controls and Data Acquisition for NSLS-II Loss Control and Monitoring

29

Y. Hu, P. Cameron, D. Chabot, L.R. Dalesio, S.L. Kramer
BNL, Upton, Long Island, New York, USA

The NSLS-II Loss Control and Monitoring (LCM) system is safety-related, but not safety-credited. This definition and requirement makes implementation requirements of controls and data acquisition (DAQ) for the LCM less stringent. However, the LCM is one of the most complicated diagnostics subsystems since it involves so many components including beam intensity monitors, scrapers, and different types of beam loss monitors, and the component interacts with each other. The control & DAQ system design and prototype test results are presented.

THBP03

Cherenkov Radiation for Beam Loss Monitor Systems

272

S.L. Kramer
BNL, Upton, Long Island, New York, USA

Funding: Work supported by U.S. DOE, Contract No.DE-AC02-98CH10886
Cherenkov radiation has been used by high energy physics to identify the mass of single particles for quite some time. Quartz fiber optics has been used to detect beam loss locations for pulsed electron beams using the time of propagation within the fiber of the light pulse. For the NSLS-II storage ring, it was necessary to detect the amount of charge lost versus location around the ring. To achieve this for a continuously circulating beam, the best solution was found to be large diameter, solid fused silica Cherenkov radiator rods which localized the beam loss to a unit of one magnet girder, which usually corresponds to one peak of transverse beam size or dispersion and therefore one loss point of interest. This paper presents an analysis of the use of Cherenkov radiation as a signal for beam loss, together with a comparison of the advantages and disadvantages of fiber optic cable and solid rod radiators for beam loss monitoring.