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Title: Two Alternate High Gradient Quadrupoles; An Upgraded Tevatron IR and A"Pipe" Design

Abstract

With the U.S. cancellation of the SSC project, the only large approved hadron accelerator project is CERN's LHC. One of the more critical elements in the performance of a collider is the quadrupole lens at the beam collision points. These quadrupoles, usually referred to as the 'insertion quads' normally form a set of triplets around the interaction region. Their focal power directly affects the luminosity available at the crossing point In order to achieve as high a gradient as possible, the CERN design team has proposed a very efficient high gradient quadrupole which is based on a graded four-layer winding structure. At Fermilab's Tevatron, an upgraded two layer winding quadrupole has been in operation since 1989, and has provided a 50% higher gradient than its predecessor. The quadrupole was basically state of the art when it was designed in 1985. Since then however, improvements have been made in cabling, conductor perfonnance, etc. Naturally, operation of a modernized version of this .design can provide higher capabilities. This improved two layer design can serve as an alternative to the more intricate graded four layer design now envisioned for the LHC, provided it can obtain the proposed gradient. A high gradient quadrupole withmore » a 'pipe' layout can be considered as a possible candidate for future large collider insertion regions. It is possible to fine-tune the design to obtain a good field-quality, the conductor is well cooled in case of a large radiation heat load, and the overall structure is smaller than a conventional quadrupole with a comparable field gradient.« less

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Accelerator& Fusion Research Division
OSTI Identifier:
1001651
Report Number(s):
LBL-36531
TRN: US201104%%103
DOE Contract Number:
DE-AC02-05CH11231
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
99; ACCELERATORS; BEAMS; CANCELLATION; CERN; COLLISIONS; DESIGN; ELEMENTS; FERMILAB TEVATRON; HADRONS; HEAT; INTERACTIONS; LAYERS; LUMINOSITY; OPERATION; PERFORMANCE; POWER; QUADRUPOLES; RADIATIONS; SUPERCONDUCTING SUPER COLLIDER; TRIPLETS

Citation Formats

McInturff, A.D., Oort, J.M. van, and Scanlan, R.M. Two Alternate High Gradient Quadrupoles; An Upgraded Tevatron IR and A"Pipe" Design. United States: N. p., 1995. Web. doi:10.2172/1001651.
McInturff, A.D., Oort, J.M. van, & Scanlan, R.M. Two Alternate High Gradient Quadrupoles; An Upgraded Tevatron IR and A"Pipe" Design. United States. doi:10.2172/1001651.
McInturff, A.D., Oort, J.M. van, and Scanlan, R.M. 1995. "Two Alternate High Gradient Quadrupoles; An Upgraded Tevatron IR and A"Pipe" Design". United States. doi:10.2172/1001651. https://www.osti.gov/servlets/purl/1001651.
@article{osti_1001651,
title = {Two Alternate High Gradient Quadrupoles; An Upgraded Tevatron IR and A"Pipe" Design},
author = {McInturff, A.D. and Oort, J.M. van and Scanlan, R.M.},
abstractNote = {With the U.S. cancellation of the SSC project, the only large approved hadron accelerator project is CERN's LHC. One of the more critical elements in the performance of a collider is the quadrupole lens at the beam collision points. These quadrupoles, usually referred to as the 'insertion quads' normally form a set of triplets around the interaction region. Their focal power directly affects the luminosity available at the crossing point In order to achieve as high a gradient as possible, the CERN design team has proposed a very efficient high gradient quadrupole which is based on a graded four-layer winding structure. At Fermilab's Tevatron, an upgraded two layer winding quadrupole has been in operation since 1989, and has provided a 50% higher gradient than its predecessor. The quadrupole was basically state of the art when it was designed in 1985. Since then however, improvements have been made in cabling, conductor perfonnance, etc. Naturally, operation of a modernized version of this .design can provide higher capabilities. This improved two layer design can serve as an alternative to the more intricate graded four layer design now envisioned for the LHC, provided it can obtain the proposed gradient. A high gradient quadrupole with a 'pipe' layout can be considered as a possible candidate for future large collider insertion regions. It is possible to fine-tune the design to obtain a good field-quality, the conductor is well cooled in case of a large radiation heat load, and the overall structure is smaller than a conventional quadrupole with a comparable field gradient.},
doi = {10.2172/1001651},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1995,
month = 4
}

Technical Report:

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  • In order to achieve very high field gradients in very small-bore small-bore quadrupole magnets, use of permanent-magnet quadrupoles (PMQs) is the only practical approach.
  • The DOE-supported IPP (Initiatives for Proliferation Prevention) Project, IPP-0110, and its accompanying 'add-on project' IPP-0110A, entitled 'High Energy Ion Technology of Interfacial Thin Film Coatings for Electronic, Optical and Industrial Applications' was a collaborative project involving the Lawrence Berkeley National Laboratory (LBNL) as the U.S. DOE lab; the US surface modification company, Phygen, Inc., as the US private company involved; and the High Current Electronics Institute (HCEI) of the Russian Academy of Sciences, Tomsk, Siberia, Russia, as the NIS Institute involved. Regular scientific research progress meetings were held to which personnel came from all participating partners. The meetings were heldmore » mostly at the Phygen facilities in Minneapolis, Minnesota (with Phygen as host) with meetings also held at Tomsk, Russia (HCEI as host), and at Berkeley, California (LBNL as host) In this way, good exposure of all researchers to the various different laboratories involved was attained. This report contains the Final Reports (final deliverables) from the Russian Institute, HCEI. The first part is that for IPP-0110A (the 'main part' of the overall project) and the second part is that for the add-on project IPP-0110A. These reports are detailed, and contain all aspects of all the research carried out. The project was successful in that all deliverables as specified in the proposals were successfully developed, tested, and delivered to Phygen. All of the plasma hardware was designed, made and tested at HCEI, and the performance was excellent. Some of the machine and performance parameters were certainly of 'world class'. The goals and requirements of the IPP Project were well satisfied. I would like to express my gratitude to the DOE IPP program for support of this project throughout its entire duration, and for the unparalleled opportunity thereby provided for all of the diverse participants in the project to join in this collaborative research. The benefits are superb, as measured in quite a number of different ways.« less