John Galambos - Academia.edu (original) (raw)

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Papers by John Galambos

Research paper thumbnail of Operations Experience of SNS at 1.4MW and Upgrade Plans for Doubling the Beam Power

The Spallation Neutron Source (SNS) is a short pulse neutron source facility driven by a high-pow... more The Spallation Neutron Source (SNS) is a short pulse neutron source facility driven by a high-power proton accelerator. Over the past the past few years SNS has undergone a systematic increase in operational beam power, culminating in operation at the proton beam design level of 1.4 MW. SNS is presently engaged in upgrades including a project to double the proton beam power capability. The recent operational power increase and the plans for upgrades will be discussed.

Research paper thumbnail of XAL Application Programming Structure

Proceedings of the 2005 Particle Accelerator Conference, 2005

XAL is an application programming framework used at the Spallation Neutron Source (SNS) project i... more XAL is an application programming framework used at the Spallation Neutron Source (SNS) project in Oak Ridge. It is written in Java, and provides users with a hierarchal view of the accelerator. Features include database configuration of the accelerator structure, an online envelope model that is configurable from design or live machine values, an application framework for quickstart GUI development, a scripting interface for algorithm development, and a common toolkit for shared resources. To date, about 25 applications have been written, many of which are used extensively in the SNS beam commissioning activities. The XAL framework and example applications will be discussed.

Research paper thumbnail of Studies of the Coherent Half-Integer Resonance

…, 2002

Abstract. We present studies of space-charge-induced beam profile broadening at high intensities ... more Abstract. We present studies of space-charge-induced beam profile broadening at high intensities in the Proton Storage Ring (PSR) at Los Alamos National Laboratory. Previous work has associated the observed broadening in the vertical direction with the coherent ...

Research paper thumbnail of Accelerator and target technology for accelerator driven transmutation and energy production

Since the early 1990's, accelerator driven systems (ADS) -subcritical assemblies driven by high p... more Since the early 1990's, accelerator driven systems (ADS) -subcritical assemblies driven by high power proton accelerators through a spallation target which is neutronically coupled to the core -have been proposed for addressing certain missions in advanced nuclear fuel cycles. Institutes throughout the world have conducted numerous programs evaluating the role of ADS in nuclear waste transmutation and energy production. In 1995, the National Research Council (NRC) issued a report on transmutation technologies [1], which included an evaluation of one ADS concept that was under study at that time: a large-scale system that proposed using a ~100-MW accelerator to drive a thermal, molten salt subcritical core. The NRC recognized the numerous complexities associated with the system, including the fact that, at that time, much of the high-power accelerator technology required for that ADS system had yet to be demonstrated. Consequently, the NRC report did not look favorably upon ADS.

Research paper thumbnail of Operations Experience of SNS at 1.4MW and Upgrade Plans for Doubling the Beam Power

The Spallation Neutron Source (SNS) is a short pulse neutron source facility driven by a high-pow... more The Spallation Neutron Source (SNS) is a short pulse neutron source facility driven by a high-power proton accelerator. Over the past the past few years SNS has undergone a systematic increase in operational beam power, culminating in operation at the proton beam design level of 1.4 MW. SNS is presently engaged in upgrades including a project to double the proton beam power capability. The recent operational power increase and the plans for upgrades will be discussed.

Research paper thumbnail of XAL Application Programming Structure

Proceedings of the 2005 Particle Accelerator Conference, 2005

XAL is an application programming framework used at the Spallation Neutron Source (SNS) project i... more XAL is an application programming framework used at the Spallation Neutron Source (SNS) project in Oak Ridge. It is written in Java, and provides users with a hierarchal view of the accelerator. Features include database configuration of the accelerator structure, an online envelope model that is configurable from design or live machine values, an application framework for quickstart GUI development, a scripting interface for algorithm development, and a common toolkit for shared resources. To date, about 25 applications have been written, many of which are used extensively in the SNS beam commissioning activities. The XAL framework and example applications will be discussed.

Research paper thumbnail of Studies of the Coherent Half-Integer Resonance

…, 2002

Abstract. We present studies of space-charge-induced beam profile broadening at high intensities ... more Abstract. We present studies of space-charge-induced beam profile broadening at high intensities in the Proton Storage Ring (PSR) at Los Alamos National Laboratory. Previous work has associated the observed broadening in the vertical direction with the coherent ...

Research paper thumbnail of Accelerator and target technology for accelerator driven transmutation and energy production

Since the early 1990's, accelerator driven systems (ADS) -subcritical assemblies driven by high p... more Since the early 1990's, accelerator driven systems (ADS) -subcritical assemblies driven by high power proton accelerators through a spallation target which is neutronically coupled to the core -have been proposed for addressing certain missions in advanced nuclear fuel cycles. Institutes throughout the world have conducted numerous programs evaluating the role of ADS in nuclear waste transmutation and energy production. In 1995, the National Research Council (NRC) issued a report on transmutation technologies [1], which included an evaluation of one ADS concept that was under study at that time: a large-scale system that proposed using a ~100-MW accelerator to drive a thermal, molten salt subcritical core. The NRC recognized the numerous complexities associated with the system, including the fact that, at that time, much of the high-power accelerator technology required for that ADS system had yet to be demonstrated. Consequently, the NRC report did not look favorably upon ADS.

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