Transcript Slide 1

LINEAR COLLIDER WORKSHOP
SiD Solenoid Status
Wes Craddock
SLAC
November 16, 2010
SiD Collaboration Meeting
Nov 15-18, 2010
SiD Solenoid Status Update
Wes Craddock / SLAC
SiD SOLENOID MAJOR DESIGN TASKS
(in order)
• 3D MAGNET FIELD CALCULATIONS FOR SOLENOID & DID
COMBINED FIELDS AND FORCES (Nearly completed)
• DESIGN OF THE DID COIL AND INTEGRATION WITH THE SOLENOID
• STRUCTURAL ANALYSIS OF COIL PACKAGE, SUPPORTS AND
VACUUM SHELL
• ASSEMBLY AND INSTALLATION PROCEDURES
• OVERALL TOLERANCES AND FINAL SIZE SPECIFICATIONS
• ENGINEERING DRAWINGS
• CRYOGENIC INTEGRATION OF THE SiD SOLENOID WITH QD0
• CONDUCTOR R&D
SiD Collaboration Meeting
Nov 15-18, 2010
SiD Solenoid Status Update
Wes Craddock / SLAC
3D ANALYSIS
FOR DID COILS
Simplified
DID Model
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An ANSYS 3D model that includes the DID coils is nearly completed.
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This model will be used to compare the OPERA 3D that Brett Parker (BNL) has
created and solved.
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This ANSYS model will permit direct / easy coupling of DID forces into
structural analysis. It can eventually be used for transient analysis and
coupling of the solenoid to the DID (solenoid quench propagation using DID)
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The ANSYS model uses the very new and improved SOLID 236/237 edge-flux
formulation elements. This should improve solution time and accuracy by
using only 1 Az degree freedom per node versus 3 A degree of freedom per
node in a magnetic vector potential degree formulation.
Still need to add the remaining DID coils, finish meshing and solve.
•
SiD Collaboration Meeting
Nov 15-18, 2010
SiD Solenoid Status Update
Wes Craddock / SLAC
SiD Collaboration Meeting
Nov 15-18, 2010
SiD Solenoid Status Update
Wes Craddock / SLAC
SiD Collaboration Meeting
Nov 15-18, 2010
SiD Solenoid Status Update
Wes Craddock / SLAC
SiD Collaboration Meeting
Nov 15-18, 2010
SiD Solenoid Status Update
Wes Craddock / SLAC
SiD Collaboration Meeting
Nov 15-18, 2010
SiD Solenoid Status Update
Wes Craddock / SLAC
SiD CONDUCTOR OPTIONS
(Other than baseline CMS conductor)
Option 1
Option 2
Dilute high purity Al alloy or
high purity Al matrix with
superconducting
Rutherford cable
Dilute high purity Al alloy or
high purity Al matrix with
superconducting cable and
two high strength wire ropes
CMS conductor must carry 130 kN = 94 MPa (avg) of hoop load
With the assumption that all the CMS hoop load is carried by its
structural aluminum with a safety factor of 2.4 on 4 K yield, the average
required 4 K aluminum alloy yield stress for SiD is 225 MPa unless
option 2 is used.
Note: High purity aluminum has a 4 K yield of 10 MPa = 1500 psi
SiD Collaboration Meeting
Nov 15-18, 2010
SiD Solenoid Status Update
Wes Craddock / SLAC
SiD CONDUCTOR DEVELOPMENT STATUS
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New conductor designs continues but at a low level.
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More emphasis will be placed on conductor manufacturing (e.g.
Conklad extrusion with cables)
Conklad Extrusion Process Used
for the ATLAS Central Solenoid
Is it possible to scale up to CMS size?
Is it possible to co-extrude Rutherford cable
with internal stainless steel reinforcing cable?
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Industrial quantities of Al-CNT composites looks difficult but still
possible.
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Other aluminum matrix (e.g.TiB2) and dilute aluminum alloys are
still being pursued.
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Recent trips: KB Alloys (Kentucky), Nanotechnology Center at
ANL, Low Temperature/High Field Superconductor Workshop
SiD Collaboration Meeting
Nov 15-18, 2010
SiD Solenoid Status Update
Wes Craddock / SLAC
SiD CONDUCTOR DEVELOPMENT DETAILS
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KB Alloys (Master Alloy Manufacturer) can make small R&D alloy
samples, especially dilute Al-Sc alloys and TiB2 matrix. They also
have a large Conform extrusion machine that could be Conklad
modified.
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From the LTSW Workshop:
The National High Field Magnet Laboratory has agreed to test any
aluminum samples (RRR in magnetic field for us).
Ohio State University; Mike Sumption: Also has interest in testing
aluminum samples for us. Strong program in MgB2 conductor
development.
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From ANL Nanotechnology Center: Encouraged to look at
functionalized carbon nanotubes; possible help with this
SiD Collaboration Meeting
Nov 15-18, 2010
SiD Solenoid Status Update
Wes Craddock / SLAC
ALUMINUM / CNT MANUFACTURING
What is now known
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Although CNTs may hold the greatest promise for high purity aluminum
reinforcement; they are the most difficult material to produce at least on
an industrial scale.
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Small sample Al-CNT composites produced by powder metallurgy. Molten
metal route is almost certainly required for industrial quantities.
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Molten aluminum does not wet CNTs.
CNTs come tangled, stick together by
Van der Waals forces and agglomerate
at grain boundaries.
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Plating or functionalization of the CNTs will be required.
Functionalization holds great promise but has not been studied with Al
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Electroless Ni or Cu plating is easy; Other better materials Ti, Nb, NbTi, Ce?
Y? require vapor deposition. The SLAC plating shop is interested in
experimenting with different plating processes.
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From a large aluminum company--- ultrasonic cavitation “clumps” the CNTs
SiD Collaboration Meeting
Nov 15-18, 2010
Extraordinary strengthening effect
of carbon nanotubes
in metal-matrix nanocomposites
processed by molecular
level mixing. Sung I. Cha, et.al.
Advanced Materials 2005,
17, p1377-1381.
SiD Solenoid Status Update
Wes Craddock / SLAC
CONCLUSIONS
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The CMS solenoid and conductor is still the baseline concept for
SiD
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Attention will shift to mechanical and cryogenic integration issues
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3D Magnetic Field/Forces to be completed in near future
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Advanced conductor development is an exciting area of many
avenues of approach, potentially benefiting all large detector
magnets (COST) as well as other areas such as high field MRI
magnets.
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SLAC wants to continue / expand detector solenoid exchange of
ideas with CERN and KEK.
SiD Collaboration Meeting
Nov 15-18, 2010
SiD Solenoid Status Update
Wes Craddock / SLAC