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Author : James R. Marshall
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (898 download)
Download or read book Superconducting Cavity Tuner Performance at CEBAF, May 1993 written by James R. Marshall and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Charles Reece
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (898 download)
Download or read book Performance of Production SRF Cavities for CEBAF, May 1993 written by Charles Reece and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance of Superconducting Cavities for CEBAF. written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Continuous Electron Beam Accelerator Facility (CEBAF) is presently under construction in Newport News, Virginia. The accelerator consists of [approx]160 meters of 5-cell niobium cavities manufactured from high thermal conductivity niobium with RRR values> 250. After an initial six-month period of first article manufacturing at a rate of 3 cavities per month, the full production rate of 12 cavities per month was reached in October 1990. These cavities are chemically treated at CEBAF, assembled into hermetically sealed cavity pairs and tested in a vertical configuration prior to installation into the accelerator. The performance of all cavities received from the manufacturer and tested at CEBAF has exceeded CEBAF's design criteria for Q value> 2.4 x 10[sup 9] at 2 K and an accelerating gradient E[sub acc]> 5 MV/m. Q[sub 0] values as high as 10[sup 10] and accelerating gradients of E[sub acc] [ge] 18 MV/m have been achieved.
Author :
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ISBN 13 :
Total Pages : 484 pages
Book Rating : 4.0/5 ( download)
Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-02 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 1080 pages
Book Rating : 4.:/5 (318 download)
Download or read book Proceedings of the 1993 Particle Accelerator Conference written by and published by . This book was released on 1993 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Superconducting Cavity Development for the CEBAF Upgrade written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-term plans for CEBAF at Jefferson Lab call for achieving 12 GeV in the middle of the next decade and 24 GeV after 2010. In support of these plans, an Upgrade Cryomodule, capable of providing more than twice the operating voltage of the existing CEBAF modules within the same length, is being developed. In particular, this requires the development of superconducting cavities capable of consistently operating at gradients above 12 MV/m and Q (approximately) 101°. We have engaged in a complete review of all the processes and procedures involved in the fabrication and assembly of cavities, and are modifying our chemical processing, cleaning, and assembly facilities. While we have retained the cell shape of existing CEBAF cavities, the new superconducting structure will be substantially different in several respects, such as the higher-order-modes damping and the fundamental power coupling systems. Design features and experimental results will be presented.
Download or read book Operating Experience with Superconducting Cavities at Jefferson Lab written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The CEBAF recirculating superconducting electron linac at Jefferson Lab is now in full operation supporting nuclear physics experiments in three target halls at up to 4.4 GeV. The 330 SRF cavities, operating at 2.0 K, continue to perform well above design specifications, and have accumulated over 8,000,000 operating cavity hours. The authors have to date no evidence of degradation of cavity performance. The SRF cavities have demonstrated excellent reliability. The one klystron per cavity design provides CEBAF with flexibility and redundancy for normal operations. Several techniques have been developed for establishing optimum operating conditions for the 330 independent systems. Operation of the cavities and control systems at the full design current of 1 mA has recently been achieved. The principal constraints on usable gradient for low current operations are (1) discharge at the cold ceramic rf window induced by electron field emission in cavities, (2) tuner controls, and (3) stability of the waveguide vacuum in the region between the warm and cold windows. Several cryomodules have been improved by application of rf helium processing while installed on the beamline.
Author : I. Campisi
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (898 download)
Download or read book Superconducting Cavity Dvelopment Fot the CEBAF Upgrade written by I. Campisi and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : C. Reece
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (898 download)
Download or read book Performance and Installation Status of Superconducting Cavities at CEBAF, August 1992 written by C. Reece and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Frequency Tuning of the CEBAF Upgrade Cavities written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-term plans for CEBAF at Jefferson Lab calls for achieving 12 GeV in the middle of the next decade and 24 GeV after 2010. In support of these plans, an Upgrade Cryomodule capable of providing more than twice the voltage of the existing ones is under development. One requirement is to operate the superconducting cavities, which are 40% longer than existing ones, at 2.5 times the original design gradient with the same amount of rf power. This puts stringent requirements on the accuracy of the frequency tuner: range of 400 kHz and resolution of 1 Hz. A new tuner design to meet these requirements is under development. This system avoids problem areas of previous designs by holding to the principles of not placing moving parts in the vacuum and/or low temperature space, and of having all drive components readily accessible for maintenance and replacement without cryomodule warm-up.
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ISBN 13 :
Total Pages : 1000 pages
Book Rating : 4.:/5 (318 download)
Download or read book Proceedings of the 1993 Particle Accelerator Conference written by and published by . This book was released on 1993 with total page 1000 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jock Fugitt
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (898 download)
Download or read book RF Drive System for the CEBAF Superconducting Cavities, May 1986 written by Jock Fugitt and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jock Fugitt
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (898 download)
Download or read book CEBAF Superconducting Cavity RF Drive System, March 1987 written by Jock Fugitt and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hasan Padamsee
Publisher : Wiley-VCH
ISBN 13 :
Total Pages : 552 pages
Book Rating : 4.:/5 (318 download)
Download or read book RF Superconductivity for Accelerators written by Hasan Padamsee and published by Wiley-VCH. This book was released on 2008-02-26 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces some of the key ideas of RF Superconductivity by using a pedagogic approach, and presents a comprehensive overview of the field. It is divided into four parts. The first part introduces the basic concepts of microwave cavities for particle acceleration. The second part is devoted to the observed behavior of superconducting cavities. In the third part, general issues connected with beam-cavity interaction and related issues for critical components are covered. The final part discusses applications of superconducting cavities to frontier accelerators of the future, drawing heavily on examples that are in their most advanced stage. Each part of the book ends in a problems section to illustrate and amplify text material as well as to draw on example applications of superconducting cavities to existing and future accelerators. FROM THE CONTENTS: * Basics * Performance of Superconducting Cavities * Couplers and Tuners * Frontier Accelerators
Download or read book Analysis of Performance Limitations for Superconducting Cavities written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The performance of superconducting cavities in accelerators can be limited by several factors, such as: field emission, quenches, arcing, rf power; and the maximum gradient at which a cavity can operate will be determined by the lowest of these limitations for that particular cavity. The CEBAF accelerator operates with over 300 cavities and, for each of them, the authors have determined the maximum operating gradient and its limiting factor. They have developed a model that allows them to determine the distribution of gradients that could be achieved for each of these limitations independently of the others. The result of this analysis can guide an R & D program to achieve the best overall performance improvement. The same model can be used to relate the performance of single-cell and multi-cell cavities.
Author : Tommy Hiatt
Publisher :
ISBN 13 :
Total Pages : 3 pages
Book Rating : 4.:/5 (898 download)
Download or read book Normal Mode Analysis of the CEBAF Accelerator Upgraded Superconducting Cavities written by Tommy Hiatt and published by . This book was released on 1999 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 1148 pages
Book Rating : 4.:/5 (89 download)
Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
