ICALEPCS2013 - List of Authors (Fowler, T.)

Paper

Title

Page

A New Spark Detection System for the Electrostatic Septa of the SPS North (Experimental) Area

246

R.A. Barlow, B. Balhan, J. Borburgh, E. Carlier, C. Chanavat, T. Fowler, B. Pinget
CERN, Geneva, Switzerland

Electrostatic septa (ZS) are used in the extraction of the particle beams from the CERN SPS to the North Area experimental zone. These septa employ high electric fields, generated from a 300 kV power supply, and are particularly prone to internal sparking around the cathode structure. This sparking degrades the electric field quality, consequently affecting the extracted beam, vacuum and equipment performance. To mitigate these effects, a Spark Detection System (SDS) has been realised, which is based on an industrial SIEMENS S7-400 programmable logic controller and deported Boolean processors modules interfaced through a PROFINET fieldbus. The SDS interlock logic uses a moving average spark rate count to determine if the ZS performance is acceptable. Below a certain spark rate it is probable that the ZS septa tank vacuum can recover, thus avoiding transition into a state where rapid degradation would occur. Above this level an interlock is raised and the high voltage is switched off. Additionally, all spark signals acquired by the SDS are sent to a front-end computer to allow further analysis such as calculation of spark rates and production of statistical data.

Poster MOPPC064 [0.366 MB]

THPPC060

A PXI-Based Low Level Control for the Fast Pulsed Magnets in the CERN PS Complex

1205

J. Schipper, E. Carlier, T. Fowler, T. Gharsa
CERN, Geneva, Switzerland

Fast pulsed magnet (kicker) systems are used for beam injection and extraction in the CERN PS complex. A novel approach, based on off-the-shelf PXI components, has been used for the consolidation of the low level part of their control system. Typical functionalities required like interlocking, equipment state control, thyratron drift stabilisation and protection, short circuit detection in magnets and transmission lines, pulsed signal acquisition and fine timing have been successfully integrated within a PXI controller. The controller comprises a National Instruments NI PXI-810x RT real time processor, a multifunctional RIO module including a Virtex-5 LX30 FPGA, a 1 GS/s digitiser and a digital delay module with 1 ns resolution. National Instruments LabVIEW development tools have been used to develop the embedded real time software as well as FPGA configuration and expert application programs. The integration within the CERN controls environment is performed using the Rapid Application Development Environment (RADE) software tools, developed at CERN.

Poster THPPC060 [0.887 MB]

Paper	Title	Page
MOPPC064	A New Spark Detection System for the Electrostatic Septa of the SPS North (Experimental) Area	246
	R.A. Barlow, B. Balhan, J. Borburgh, E. Carlier, C. Chanavat, T. Fowler, B. Pinget CERN, Geneva, Switzerland
	Electrostatic septa (ZS) are used in the extraction of the particle beams from the CERN SPS to the North Area experimental zone. These septa employ high electric fields, generated from a 300 kV power supply, and are particularly prone to internal sparking around the cathode structure. This sparking degrades the electric field quality, consequently affecting the extracted beam, vacuum and equipment performance. To mitigate these effects, a Spark Detection System (SDS) has been realised, which is based on an industrial SIEMENS S7-400 programmable logic controller and deported Boolean processors modules interfaced through a PROFINET fieldbus. The SDS interlock logic uses a moving average spark rate count to determine if the ZS performance is acceptable. Below a certain spark rate it is probable that the ZS septa tank vacuum can recover, thus avoiding transition into a state where rapid degradation would occur. Above this level an interlock is raised and the high voltage is switched off. Additionally, all spark signals acquired by the SDS are sent to a front-end computer to allow further analysis such as calculation of spark rates and production of statistical data.
	Poster MOPPC064 [0.366 MB]

THPPC060	A PXI-Based Low Level Control for the Fast Pulsed Magnets in the CERN PS Complex	1205
	J. Schipper, E. Carlier, T. Fowler, T. Gharsa CERN, Geneva, Switzerland
	Fast pulsed magnet (kicker) systems are used for beam injection and extraction in the CERN PS complex. A novel approach, based on off-the-shelf PXI components, has been used for the consolidation of the low level part of their control system. Typical functionalities required like interlocking, equipment state control, thyratron drift stabilisation and protection, short circuit detection in magnets and transmission lines, pulsed signal acquisition and fine timing have been successfully integrated within a PXI controller. The controller comprises a National Instruments NI PXI-810x RT real time processor, a multifunctional RIO module including a Virtex-5 LX30 FPGA, a 1 GS/s digitiser and a digital delay module with 1 ns resolution. National Instruments LabVIEW development tools have been used to develop the embedded real time software as well as FPGA configuration and expert application programs. The integration within the CERN controls environment is performed using the Rapid Application Development Environment (RADE) software tools, developed at CERN.
	Poster THPPC060 [0.887 MB]