VLHC Workshop

MAGNETS FOR A VERY LARGE HADRON COLLIDER

November 16-18, 1998
Danfords, Port Jefferson, Long Island, NY

The workshop will follow the Charge from the VLHC Steering Committee:

Guided by the Snowmass '96 parameter sets, explore and develop innovative concepts that will result in significant cost reductions. Coordinate parameter sets, infrastructure requirements for the various options, and designs with the other working groups.

Review progress in magnet R&D (include materials and may include cryogenics, vacuum). Develop bases including costs for comparing different magnet designs. Monitor, encourage, and coordinate progress in materials development both in academe and industry.

A particularly important goal of the workshop is to identify high-payoff topics for vlhc magnet R&D (including SBIR's and CRADA's). To accomplish this in the time available, the workshop topics have been limited to those most directly concerned with the magnets.

Workshop presentations and discussions will take place Monday afternoon and Tuesday. Wednesday morning, the session organizers will summarize the discussions, including the R&D topics that seemed most promising.

SUNDAY, November 15, 4-8 pm: Registration, Board Room #4, Danford's

MONDAY, NOVEMBER 16, 8 AM; Registration outside Diplomat Room, Danford's

MONDAY MORNING: INTRODUCTORY TALKS - start 9 AM (coffee break: 10:30)
Chair: Peter Wanderer

Gerry Dugan: "Review of Snowmass '96 Parameters." pdf file, 45 KB
Bill Sampson: "Vlhc Magnet Program at Brookhaven" pdf file, 488 KB
Iouri Terechkine: "Vlhc High Field Magnet Program at Fermilab" pdf file, 2.4 MB
Peter McIntyre: "Vlhc Magnet Program at Texas AM" (20 min)
Ron Scanlan: "Vlhc Magnet Program at Berkeley" pdf file, 2.6 MB
Bill Foster: "Vlhc Low Field Magnet Program at Fermilab" (20 min.)
Alexander Kovalenko: "A Cold-Iron low-field magnet for vlhc" (20 min)
Bill Barletta: "Erice Workshops on Accelerator Magnets" (15 min)

MONDAY LUNCH - 12:30 Brookhaven Room, Danford's

SESSION ONE: FIELD QUALITY AND RELATED ACCELERATOR REQUIREMENTS
Diplomat Room. Session begins 2 PM (coffee break 3:30)
organizer: Steve Peggs

This session covers:

Accelerator design options that affect aperture and field quality requirements.
Geometric, hysteretic, saturation, and time-dependent contributions to field quality.
Dynamic and physical magnet apertures (including beam screens).
Design efficiency (field per superconductor mass) and good field regions.
Construction tolerances and field quality sensitivity.
Alignment.
Experience from production series of cos theta magnets.

Speakers:

Steve Peggs: "Magnet Field Quality and Lattice Design Options" pdf file, 114KB
Ramesh Gupta: "Field Quality Aspects of the Different Magnet Designs" pdf file, 2.4 MB
Gianluca Sabbi: "Magnetic Design of Small Aperture Dipoles of the shell and block type" PowerPoint file (html)
Vladimir Kashikhin: "Iron Magnetic Design and Test for Low-Field Magnets" html file
Bill Foster: "Aperture Budget for Low Field VLHC and Injector" (5 min + discussion)
Ramesh Gupta: "Common Coil Magnet System with a Large Dynamic Range" pdf file, 737 KB

Special end-of-the session/day crazy new idea talk:
Gerry Dugan: "vlhc with a Full Energy Injector" pdf file, 29 KB

MONDAY, WORKSHOP RECEPTION, 6-8 pm, Brookhaven Room (dinner is "on your own")

TUESDAY MORNING: Registration desk opens at 8:15 AM, outside Diplomat Room

SESSION TWO: MAGNET CONSTRUCTION TECHNIQUES AND TOOLING DESIGN
Diplomat Room. Session begins at 8:30 am. (coffee break 10:30)
organizer: Peter McIntyre

This session covers:

Design-specific aspects of magnet construction and tooling. (For magnets made from brittle materials, these would include discussion of react & wind versus wind & react, potting, electrical insulation etc. for cos theta and block coils.)
Lessons from other programs (RHIC, LHC, SSC).

Speakers:

Peter McIntyre: "Construction of Dipoles with Block Coils" (20 min)
Steve Gourlay: "Construction of Common Coil Magnets" pdf file, 2.4 MB
Mike Anerella: "R&D yoke for Common Coil Magnets" (15 min.)
Peter Mazur: "Transmission Line Manufacture, Test, Reliability Issues" (20 min)
Mike Tupper: "New developments in magnet insulation" pdf file, 61 KB
Erich Willen: "A concept for a slotted magnet" pdf file, 181 KB

TUESDAY LUNCH, NOON to 2 pm, "on your own"

SESSION THREE: COST DRIVERS FOR MAGNETS
Diplomat Room. Session begins Tuesday late morning, ends Tuesday by 3:30.
organizer: Steve Gourlay

This session covers:

Breakdown of costs from previous and present magnet programs.
Cryogenics (capital and operating costs for various temperatures).
Scaling rules for changes in aperture, length.

Speakers:

Steve Gourlay, "Magnet Cost Issues" pdf file, 186 KB
Erich Willen, "Cost scaling for moderate-field magnets" pdf file, 69 KB
Mike Anerella: "Partnerships with Industry: BNL and Northrop-Grumman" pdf file, 108KB
Peter Wanderer, "RHIC arc dipole costs" pdf file, 5 KB
Mike McAshan: "Cost vs. Operating Temperature" (20 min)
Mike McAshan: "Cryogenic Cost Studies for low-field magnets" (20 min)
Bill Fowler: "Cost studies for low-field transmission line magnets" (20 min)
Bill Hassenzahl: "Costs of BSCCO Conductor as a function of temperature and field" pdf file, 4 MB

TUESDAY AFTERNOON COFFEE BREAK: 3:30 pm

SESSION FOUR: SUPERCONDUCTOR STATUS AND PROSPECTS
Diplomat Room. Session begins 4 pm.
organizer: Ron Scanlan

This session covers:

Engineering current densities for NbTi, Nb₃Sn, Nb₃Al, HTS.
Economy-of-scale in production
Parameters controlling magnetization, eddy currents, etc.
Strain sensitivity

Speakers:

Ron Scanlan, LBNL, "Conductor Requirements/Specifications" pdf file, 3 MB
Mas Suenaga, BNL, "HTS Status" pdf file, 889 KB
Fred Asner: "R&D for Future High Field Nb₃Sn Collider Magnets" (20 min)
Eric Gregory, IGC, "Nb₃Sn Status" pdf file, 843 KB
Mike Sumption, OSU, "Nb₃Al Status" 2.5 MB
Ernie Malamud, Fermilab: "Nb₃Al Transmission Line Conductor" html file

TUESDAY 6-7 pm RECEPTION
7 pm DINNER
both in the Brookhaven Room

WEDNESDAY 9 AM, Workshop Summary Talks
Diplomat Room (coffee break 10:30)
Chair: Mike Harrison

Steve Peggs: "Field Quality and Related Accelerator Requirements" pdf file, 121 KB
Peter McIntyre: "Magnet Construction Techniques and Tooling Design" pdf file, 1.5 MB
Steve Gourlay: "Cost Drivers for Magnets" pdf file, 130 KB
Ron Scanlan: "Superconductor Status and Prospects" pdf file, 3.0 MB

WEDNESDAY NOON ADJOURN

Tours of the Relativistic Heavy Ion Collider (RHIC) at Brookhaven Lab will be available Wednesday afternoon, for those interested. Details will be announced at the Workshop. (All accelerator magnets for RHIC have been delivered to the rings.)

Workshop Program Committee

Peter Wanderer, Brookhaven, Chair
Gerry Dugan, Cornell
Bill Foster, Fermilab
Peter Limon, Fermilab
Ernie Malamud, Fermilab
Peter McIntyre, Texas A&M
Ron Scanlan, Berkeley

The Workshop Secretary is Diana Votruba at BNL
phone 516- 344- 5123
fax 516- 344- 2190

WORKSHOP PROCEEDINGS Contributions will be posted as .pdf files on the Web. (There will not be a paper version of the Proceedings.) Contributions will be accepted in any form, although there is a preference for the familiar format of the Particle Accelerator Conference. The easiest file types to work with are .ps and .pdf. To help avoid errors, we are asking for both a hard copy and an electronic version of contributions. We will be able to make copies of transparencies at the meeting. Electronic contributions may be submitted via FTP to "magnets.rhic.bnl.gov" (login as anonymous; enter your email address as the password) or on floppies. [Comments or problems with FTP should be sent to David McChesney, mcchesne@bnl.gov]. When the Proceedings are available, the link to their Web site will be at http://www.rhichome.bnl.gov/FHC/ and http://vlhc.org.

Financial support for the workshop from

Lawrence Berkeley National Lab

Brookhaven National Lab

Fermilab

Information is also available from the Magnet Technologies Working Group Convenors:

Bill Foster
Ron Scanlan
Peter Wanderer, Conference Chair

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This page follows one originally done by E. Malamud for vlhc.org

Last modified Mar. 22, 1999