2011 Particle Accelerator Conference - Table of Session: WEOBN (Instrumentation and Controls II)

Paper

Title

Page

Simultaneous Orbit, Tune, Coupling, and Chromaticity Feedback at RHIC

1394

M.G. Minty, A.J. Curcio, W.C. Dawson, C. Degen, R.L. Hulsart, Y. Luo, G.J. Marr, A. Marusic, K. Mernick, R.J. Michnoff, P. Oddo, V. Ptitsyn, G. Robert-Demolaize, T. Russo, V. Schoefer, C. Schultheiss, S. Tepikian, M. Wilinski
BNL, Upton, Long Island, New York, USA
T. Satogata
JLAB, Newport News, Virginia, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
All physics stores at the Relativistic Heavy Ion Collider are now established using simultaneous orbit, tune, coupling, and energy feedback during beam injection, acceleration to full beam energies, during the “beta-squeeze” for establishing small beam sizes at the interaction points, and during removal of separation bumps to establish collisions. In this report we describe the major changes made to enable these achievements. The proof-of-principle for additional chromaticity feedback will also be presented.

Slides WEOBN1 [8.054 MB]

WEOBN2

Real-Time Beam Control at the LHC

1399

R.J. Steinhagen
CERN, Geneva, Switzerland

At the LHC, real-time feedback systems continually control the orbit, tune, coupling, and chromaticity. Reliable and precise control of these parameters is essential to avoid superconducting magnet quenches or damage to LHC components. The speaker will review the underlying principles and hardware, and describe experiences with these systems during LHC commissioning and operations.

Slides WEOBN2 [5.475 MB]

WEOBN3

BOY, A Modern Graphical Operator Interface Editor and Runtime

1404

X.H. Chen, K.-U. Kasemir
ORNL, Oak Ridge, Tennessee, USA

Funding: SNS is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy
Taking advantage of modern graphical editor software technology, a new Operator Interface (OPI) editor and runtime - Best OPI, Yet (BOY) - was developed by the Control System Studio (CSS) collaboration. It uses the Eclipse Graphical Editor Framework (GEF) to provide modern graphical editor functions, which makes it easy and intuitive to edit OPIs. Combined with Javascript and configurable rules, it is also easy to create powerful OPIs with complicated client-side logic. By simply providing the name of a Process Variable (PV), it will automatically handle the network connections. The graphical layer is decoupled from the data connection layer, conceptually allowing BOY to connect to arbitrary data sources, with current support including EPICS Channel Access and simulation PVs. BOY is integrated with the CSS platform, which provides inter-operability with other CSS tools. Fundamentally, it could also be integrated with other Eclipse Rich Client Platform (RCP) applications due to its plugin mechanism. We have several screens deployed at the Spallation Neutron Source (SNS), where BOY has proven to be stable in support of SNS operation.

Slides WEOBN3 [3.461 MB]

WEOBN4

Multipurpose Controller Based on a FPGA with EPICS Integration

1407

P. Echevarria, I. Arredondo, N. Garmendia, H. Hassanzadegan, L. Muguira
ESS Bilbao, Bilbao, Spain
D. Belver, M. del Campo
ESS-Bilbao, Zamudio, Spain
V. Etxebarria, J. Jugo
University of the Basque Country, Faculty of Science and Technology, Bilbao, Spain

In this work a multipurpose configurable control system is presented. This controller is based on a high performance FPGA for a fast control connected to a Host PC which works as an EPICS server to allow a remote control. The communication between both parts is made by a register bank implemented in the FPGA and which is accessible by the Host PC by means of a Compact PCI bus. The initialization values, the numeric representation of the digital signals and the EPICS database are configured by an XML file. This control scheme has been prototyped for two applications: Low Level RF and Beam Position Monitoring. The former contains three digital loops to control the amplitude and phase of the RF supply and the geometry of the cavity. The latter processes the information from four capacitive buttons to calculate the position of the beam. In both systems, the necessary parameters for the digital processing of the acquired signals (using fast ADCs) and intermediate calculations are stored in the register bank connected to the cPCI bus. These systems are being developed for the ESS-Bilbao facility which will be built in Bilbao, Spain.

Slides WEOBN4 [0.621 MB]

WEOBN5

Concept and Architecture of the RHIC LLRF Upgrade Platform

1410

K.S. Smith, T. Hayes, F. Severino
BNL, Upton, Long Island, New York, USA

Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy
The goal of the RHIC LLRF upgrade has been the development of a stand alone, generic, high performance, modular LLRF control platform, which can be configured to replace existing systems and to serve as a common platform for all new RF systems. The platform is also designed to integrate seamlessly into a distributed network based controls infrastructure, be easy to deploy, and to be useful in a variety of digital signal processing and data acquisition roles. Reuse of hardware, software and firmware has been emphasized to minimize development effort and maximize commonality of system components. System interconnection, synchronization and scaling is facilitated by a deterministic, high speed serial timing and data link, while standard intra and inter chassis communications utilize high speed, non-deterministic protocol based serial links. System hardware configuration is modular and flexible, based on a combination of a main carrier board which can host up to six custom or commercial daughter modules as required to implement desired functionality. This paper will provide an overview of the platform concept, architecture, features and benefits.

Slides WEOBN5 [31.462 MB]

WEOBN6

LARP LHC 4.8 GHz Schottky System Initial Commissioning with Beam

1413

R.J. Pasquinelli
Fermilab, Batavia, USA
F. Caspers, O.R. Jones
CERN, Geneva, Switzerland
A. Jansson
ESS, Lund, Sweden

The LHC Schottky system consists for four independent 4.8 GHz triple down conversion receivers with associated data acquisition systems. Each system is capable of measuring tune, chromaticity, momentum spread in either horizontal or vertical planes; two systems per beam. The hardware commissioning has taken place during the spring and summer of 2010. With nominal bunch beam currents of 10¹¹ protons, the first incoherent Schottky signals were detected and analyzed. This paper will report on these initial commissioning results. A companion paper will report on the data analysis curve fitting and remote control user interface of the system.

Slides WEOBN6 [27.117 MB]

Paper	Title	Page
WEOBN1	Simultaneous Orbit, Tune, Coupling, and Chromaticity Feedback at RHIC	1394
	M.G. Minty, A.J. Curcio, W.C. Dawson, C. Degen, R.L. Hulsart, Y. Luo, G.J. Marr, A. Marusic, K. Mernick, R.J. Michnoff, P. Oddo, V. Ptitsyn, G. Robert-Demolaize, T. Russo, V. Schoefer, C. Schultheiss, S. Tepikian, M. Wilinski BNL, Upton, Long Island, New York, USA T. Satogata JLAB, Newport News, Virginia, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. All physics stores at the Relativistic Heavy Ion Collider are now established using simultaneous orbit, tune, coupling, and energy feedback during beam injection, acceleration to full beam energies, during the “beta-squeeze” for establishing small beam sizes at the interaction points, and during removal of separation bumps to establish collisions. In this report we describe the major changes made to enable these achievements. The proof-of-principle for additional chromaticity feedback will also be presented.
	Slides WEOBN1 [8.054 MB]

WEOBN2	Real-Time Beam Control at the LHC	1399
	R.J. Steinhagen CERN, Geneva, Switzerland
	At the LHC, real-time feedback systems continually control the orbit, tune, coupling, and chromaticity. Reliable and precise control of these parameters is essential to avoid superconducting magnet quenches or damage to LHC components. The speaker will review the underlying principles and hardware, and describe experiences with these systems during LHC commissioning and operations.
	Slides WEOBN2 [5.475 MB]

WEOBN3	BOY, A Modern Graphical Operator Interface Editor and Runtime	1404
	X.H. Chen, K.-U. Kasemir ORNL, Oak Ridge, Tennessee, USA
	Funding: SNS is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy Taking advantage of modern graphical editor software technology, a new Operator Interface (OPI) editor and runtime - Best OPI, Yet (BOY) - was developed by the Control System Studio (CSS) collaboration. It uses the Eclipse Graphical Editor Framework (GEF) to provide modern graphical editor functions, which makes it easy and intuitive to edit OPIs. Combined with Javascript and configurable rules, it is also easy to create powerful OPIs with complicated client-side logic. By simply providing the name of a Process Variable (PV), it will automatically handle the network connections. The graphical layer is decoupled from the data connection layer, conceptually allowing BOY to connect to arbitrary data sources, with current support including EPICS Channel Access and simulation PVs. BOY is integrated with the CSS platform, which provides inter-operability with other CSS tools. Fundamentally, it could also be integrated with other Eclipse Rich Client Platform (RCP) applications due to its plugin mechanism. We have several screens deployed at the Spallation Neutron Source (SNS), where BOY has proven to be stable in support of SNS operation.
	Slides WEOBN3 [3.461 MB]

WEOBN4	Multipurpose Controller Based on a FPGA with EPICS Integration	1407
	P. Echevarria, I. Arredondo, N. Garmendia, H. Hassanzadegan, L. Muguira ESS Bilbao, Bilbao, Spain D. Belver, M. del Campo ESS-Bilbao, Zamudio, Spain V. Etxebarria, J. Jugo University of the Basque Country, Faculty of Science and Technology, Bilbao, Spain
	In this work a multipurpose configurable control system is presented. This controller is based on a high performance FPGA for a fast control connected to a Host PC which works as an EPICS server to allow a remote control. The communication between both parts is made by a register bank implemented in the FPGA and which is accessible by the Host PC by means of a Compact PCI bus. The initialization values, the numeric representation of the digital signals and the EPICS database are configured by an XML file. This control scheme has been prototyped for two applications: Low Level RF and Beam Position Monitoring. The former contains three digital loops to control the amplitude and phase of the RF supply and the geometry of the cavity. The latter processes the information from four capacitive buttons to calculate the position of the beam. In both systems, the necessary parameters for the digital processing of the acquired signals (using fast ADCs) and intermediate calculations are stored in the register bank connected to the cPCI bus. These systems are being developed for the ESS-Bilbao facility which will be built in Bilbao, Spain.
	Slides WEOBN4 [0.621 MB]

WEOBN5	Concept and Architecture of the RHIC LLRF Upgrade Platform	1410
	K.S. Smith, T. Hayes, F. Severino BNL, Upton, Long Island, New York, USA
	Funding: Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy The goal of the RHIC LLRF upgrade has been the development of a stand alone, generic, high performance, modular LLRF control platform, which can be configured to replace existing systems and to serve as a common platform for all new RF systems. The platform is also designed to integrate seamlessly into a distributed network based controls infrastructure, be easy to deploy, and to be useful in a variety of digital signal processing and data acquisition roles. Reuse of hardware, software and firmware has been emphasized to minimize development effort and maximize commonality of system components. System interconnection, synchronization and scaling is facilitated by a deterministic, high speed serial timing and data link, while standard intra and inter chassis communications utilize high speed, non-deterministic protocol based serial links. System hardware configuration is modular and flexible, based on a combination of a main carrier board which can host up to six custom or commercial daughter modules as required to implement desired functionality. This paper will provide an overview of the platform concept, architecture, features and benefits.
	Slides WEOBN5 [31.462 MB]

WEOBN6	LARP LHC 4.8 GHz Schottky System Initial Commissioning with Beam	1413
	R.J. Pasquinelli Fermilab, Batavia, USA F. Caspers, O.R. Jones CERN, Geneva, Switzerland A. Jansson ESS, Lund, Sweden
	The LHC Schottky system consists for four independent 4.8 GHz triple down conversion receivers with associated data acquisition systems. Each system is capable of measuring tune, chromaticity, momentum spread in either horizontal or vertical planes; two systems per beam. The hardware commissioning has taken place during the spring and summer of 2010. With nominal bunch beam currents of 10¹¹ protons, the first incoherent Schottky signals were detected and analyzed. This paper will report on these initial commissioning results. A companion paper will report on the data analysis curve fitting and remote control user interface of the system.
	Slides WEOBN6 [27.117 MB]