(Overview of RF Systems for the Advanced Photon Source).
(Overview of RF Systems for the Advanced Photon Source).

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Published: 1990

Total Pages: 68

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The Advanced Photon Source (APS) is being built by Argonne National Laboratory (ANL) near Chicago. The APS is a 7-GeV positron storage ring from which x-ray beams of energies from a few keV to hundreds of keV are emitted as the positrons pass through ring bending magnets and also through special magnets called wigglers and undulators. The present schedule is to be operational in 1995. The energy emitted from the positron beam as x-rays is replaced through a radio-frequency accelerating system operating at 352 MHz at a maximum power level of 3 MW. The RF system will be described as well as several lower-power systems at frequencies of 0.8 MHz, 117 MHz and 2.8 GHz. The associated control electronics (phase shifters amplitude control, automatic tuning control, etc.) as well as the computer control architecture will also be described.

An Overview of the APS 352-MHz Rf Systems
An Overview of the APS 352-MHz Rf Systems

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Published: 1997

Total Pages: 4

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The Advanced Photon Source (APS) is a 7-GeV full energy positron storage ring for generating synchrotron radiation with an injector. The booster synchrotron rf system consists o a single 1-MW klystron which drives four five-cell cavities at 352 MHz. The storage ring cavities consist of four groups of four single cells powered by two 1-MW klystrons for 100-mA operation. An overview of the operation of the APS 352-MHz rf systems is presented.

Status Report on the Radio Frequency Accelerating System of the APS (Advanced Photon Source) at Argonne
Status Report on the Radio Frequency Accelerating System of the APS (Advanced Photon Source) at Argonne

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Published: 1989

Total Pages: 4

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Argonne National Laboratory is designing a 7-GeV Advanced Photon Source (APS). The rf systems of the APS include 10-MHz and 120-MHz systems for the Positron Accumulator Ring (PAR), a multicell 352-MHz system for the booster synchrotron, and a system of mode-damped, single-cell 352-MHz cavities for the storage ring. The paper will describe the design of the PAR cavities, the configuration of the booster system, test results of the junction circulator developed for the cavities, and results of the higher-order mode damping as applied to the storage ring cavities. 10 refs., 1 fig., 2 tabs.

General Overview of the APS Low-level Rf Control System
General Overview of the APS Low-level Rf Control System

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Published: 1993

Total Pages: 4

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This paper describes the proposed low-level rf system of the positron accumulator ring (PAR), the injector synchrotron, and the storage ring of the 7-GeV Advanced Photon Source. Four rf systems are described since the PAR consists of a fundamental frequency system at 9.8 MHz and a harmonic system at 117 MHz. A block diagram of an accelerating unit is shown and descriptions of various control loops are made (including amplitude control, phase control, and cavity tuning control). Also, a brief overview of the computer interface is given.

Review of the APS SR RF Systems
Review of the APS SR RF Systems

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Published: 1998

Total Pages: 5

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The Advanced Photon Source (APS) is a 7-GeV full energy storage ring (SR) for generating synchrotron radiation with an injector. The storage ring cavities consist of four groups of four single cells powered by up to four 1-MW klystrons for up to 300-mA operation. A review of the operation of the rf system as well as rf-related beam dynamics is presented. This review includes rf power distribution, low-level feedback, control law, beam loading, beam instabilities, higher-order modes, and beam-induced multipactoring.

RF Radiation Measurement for the Advanced Photon Source (AS) Personnel Safety System
RF Radiation Measurement for the Advanced Photon Source (AS) Personnel Safety System

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Published: 1995

Total Pages: 4

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The Advanced Photon Source (APS) booster and storage ring RF system consists of five 1-MW klystrons, four 5-cell cavities, and sixteen single-cell cavities. The RF power is distributed through many hundreds of feet of WR2300 waveguide with H-hybrids and circulators. In order to protect personnel from the danger of RF radiation due to loose flanges or other openings in the waveguide system, three detector systems were implemented: an RF radiation detector, a waveguide pressure switch, and a Radiax aperture detector (RAD). This paper describes RF radiation measurements on the WR 2300 waveguide system.

Design and Construction of the Advanced Photon Source 352-MHz Rf System Switching Control
Design and Construction of the Advanced Photon Source 352-MHz Rf System Switching Control

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Published: 1997

Total Pages: 4

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A switching control system has been designed and built to provide the capability of rapidly switching the waveguide and low-level cabling between different klystrons to operate the Advanced Photon Source storage ring in the event of a failure of a klystron system or to perform necessary repairs and preventative maintenance. The twelve possible modes of operation allow for complete redundancy of the booster synchrotron rf system and either a maximum of two storage ring rf systems to be completely off-line or one system to be used as a power source for an rf test stand. A programmable controller is used to send commands to intermediate control panels which interface to WR2300 waveguide switches and phase shifters, rf cavity interlock and low-level rf distribution systems, and klystron power supply controls for rapid reconfiguration of the rf systems in response to a mode-selection command. Mode selection is a local manual operation using a keyswitch arrangement which prevents more than one mode from being selected at a time. The programmable controller also monitors for hardware malfunction and guards against {open_quotes}hot-switching{close_quotes} of the rf systems. The rf switching controls system is monitored via the Experimental Physics and Industrial Control System (EPICS) for remote system status check.

Working Group Summary Reports from the Advanced Photon Source Reliability Workshop
Working Group Summary Reports from the Advanced Photon Source Reliability Workshop

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Published: 1992

Total Pages: 64

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A workshop was held at APS to address reliability goals for accelerator systems. Seventy-one individuals participated in the workshop, including 30 from other institutions. The goals of the workshop were to: (1) Give attendees an introduction to the basic concepts of reliability analysis. (2) Exchange information on operating experience at existing accelerator facilities and strategies for achieving reliability at facilities under design or in construction. (3) Discuss reliability goals for APS and the means of their achievement. This report contains the working group summary report an APS's following systems: RF Systems; Power Supplies; Magnet Systems; Interlock and Diagnostics; and Vacuum Systems.