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Languages : en
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Book Description
The Spallation Neutron Source (SNS) has been operating at the MW level for about one year. Experience in beam loss control and machine activation at this power level is presented. Also experience with machine protection systems is reviewed, which is critical at this power level. One of the most challenging operational aspects of high power operation has been attaining high availability, which is also discussed. SNS is completing the power increase to 1 MW operation. The beam loss and activation levels are generally within expected levels, except the SCL - where no beam loss was predicted. Workforce dose is not excessive and beam loss is not a limitation on operational power yet. Operation at 1 MW power levels requires careful vigilance for machine protection, with redundant and multi-level layers of protection. Beam availability is quite challenging and approaching 90% availability is quite difficult.
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Publisher:
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Category :
Languages : en
Pages :
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Book Description
The Spallation Neutron Source (SNS) has been operating at the MW level for about one year. Experience in beam loss control and machine activation at this power level is presented. Also experience with machine protection systems is reviewed, which is critical at this power level. One of the most challenging operational aspects of high power operation has been attaining high availability, which is also discussed. SNS is completing the power increase to 1 MW operation. The beam loss and activation levels are generally within expected levels, except the SCL - where no beam loss was predicted. Workforce dose is not excessive and beam loss is not a limitation on operational power yet. Operation at 1 MW power levels requires careful vigilance for machine protection, with redundant and multi-level layers of protection. Beam availability is quite challenging and approaching 90% availability is quite difficult.
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Category :
Languages : en
Pages :
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Category :
Languages : en
Pages : 72
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Category :
Languages : en
Pages : 726
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Author: Alexander Wu Chao
Publisher: World Scientific
ISBN: 981458326X
Category : Science
Languages : en
Pages : 320
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Book Description
As particle accelerators strive forever increasing performance, high intensity particle beams become one of the critical demands requested across the board by a majority of accelerator users (proton, electron and ion) and for most applications. Much effort has been made by our community to pursue high intensity accelerator performance on a number of fronts. Recognizing its importance, we devote this volume to Accelerators for High Intensity Beams. High intensity accelerators have become a frontier and a network for innovation. They are responsible for many scientific discoveries and technological breakthroughs that have changed our way of life, often taken for granted. A wide range of topics is covered in the fourteen articles in this volume.
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Languages : en
Pages : 8
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Collaborative development and operation of large physics experiments is fairly common. Less common is the collaborative development or operation of accelerators. A current example of the latter is the Spallation Neutron Source (SNS). The SNS project was conceived as a collaborative effort between six DOE facilities. In the SNS case, the control system was also developed collaboratively. The SNS project has now moved beyond the collaborative development phase and into the phase where Oak Ridge National Lab (ORNL) is integrating contributions from collaborating ''partner labs'' and is beginning accelerator operations. In this paper, the author reflects on the benefits and drawbacks of the collaborative development of an accelerator control system as implemented for the SNS project from the perspective of a partner lab.
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Languages : en
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The Spallation Neutron Source (SNS) has ramped up the operational power level from a few kW to over 500 kW since initial operations nearly two years ago. As SNS approaches the design operating level of 1.44 MW, high intensity effects are encountered. Beam loss is the primary concern at the present time. Other high intensity issues of concern that addressed here include foil survival, collective effects and machine protection.
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Languages : en
Pages : 27
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Book Description
The workshop reviewed the ion-source requirements for high-power accelerator-driven spallation neutron facilities, and the performance of existing ion sources. Proposals for new facilities in the 1- to 5-MW range call for a widely differing set of ion-source requirements. For example, the source peak current requirements vary from 40 mA to 150 mA, while the duty factor ranges from 1% to 9%. Much of the workshop discussion centered on the state-of-the-art of negative hydrogen ion source (H−) technology and the present experience with Penning and volume sources. In addition, other ion source technologies, for positive ions or CW applications were reviewed. Some of these sources have been operational at existing accelerator complexes and some are in the source-development stage on test stands.
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Languages : en
Pages : 5
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Preliminary design and analysis indicate that a very attractive short-pulse neutron source operating at 1 MW of proton beam power can be constructed for the National Spallation Neutron Source (NSNS) using liquid mercury as the target material. Research and development activities have been identified to validate design concepts and to allow future upgrades to higher power levels. Reasonable design configurations have been proposed for major component assemblies and remote handling concepts developed.
Author: Frank T Avignone Iii
Publisher: World Scientific
ISBN: 9814545546
Category :
Languages : en
Pages : 214
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Book Description
This proceedings volume is a collection of papers dealing with the applications of spallation neutron sources to pure science, applied science and defense programs. The topics, ranging from accelerator technology to applications in materials science and neutrino physics, are covered by experts in their respective fields.
