1. LINEAR COLLIDER WORKSHOP SiD Solenoid Status
Wes Craddock
SLAC
November 16, 2010
SiD Solenoid Status Update
Wes Craddock / SLAC

2. 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 Solenoid Status Update
Wes Craddock / SLAC

3. 3D ANALYSIS FOR DID COILS
Simplified
DID Model
An ANSYS 3D model that includes the DID coils is nearly completed.
This model will be used to compare the OPERA 3D that Brett Parker (BNL) has created and solved.
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)
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 Solenoid Status Update
Wes Craddock / SLAC

4. SiD Solenoid Status Update
Wes Craddock / SLAC

5. SiD Solenoid Status Update
Wes Craddock / SLAC

6. SiD Solenoid Status Update
Wes Craddock / SLAC

7. SiD Solenoid Status Update
Wes Craddock / SLAC

8. SiD CONDUCTOR OPTIONS (Other than baseline CMS conductor)
Dilute high purity Al alloy or high purity Al matrix with superconducting cable and two high strength wire ropes
Dilute high purity Al alloy or high purity Al matrix with
superconducting
Rutherford cable
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 Solenoid Status Update
Wes Craddock / SLAC

9. SiD CONDUCTOR DEVELOPMENT STATUS
New conductor designs continues but at a low level.
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?
Industrial quantities of Al-CNT composites looks difficult but still possible.
Other aluminum matrix (e.g.TiB2) and dilute aluminum alloys are still being pursued.
Recent trips: KB Alloys (Kentucky), Nanotechnology Center at ANL, Low Temperature/High Field Superconductor Workshop
SiD Solenoid Status Update
Wes Craddock / SLAC

10. SiD CONDUCTOR DEVELOPMENT DETAILS
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.
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.
From ANL Nanotechnology Center: Encouraged to look at functionalized carbon nanotubes; possible help with this
SiD Solenoid Status Update
Wes Craddock / SLAC

11. ALUMINUM / CNT MANUFACTURING What is now known
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.
Small sample Al-CNT composites produced by powder metallurgy. Molten metal route is almost certainly required for industrial quantities.
Molten aluminum does not wet CNTs.
CNTs come tangled, stick together by
Van der Waals forces and agglomerate
at grain boundaries.
Plating or functionalization of the CNTs will be required.
Functionalization holds great promise but has not been studied with Al
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.
From a large aluminum company--- ultrasonic cavitation “clumps” the CNTs
Extraordinary strengthening effect of carbon nanotubes
in metal-matrix nanocomposites processed by molecular
level mixing. Sung I. Cha, et.al. Advanced Materials 2005,
17, p
SiD Solenoid Status Update
Wes Craddock / SLAC

12. SiD Solenoid Status Update
CONCLUSIONS
The CMS solenoid and conductor is still the baseline concept for SiD
Attention will shift to mechanical and cryogenic integration issues
3D Magnetic Field/Forces to be completed in near future
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.
SLAC wants to continue / expand detector solenoid exchange of ideas with CERN and KEK.
SiD Solenoid Status Update
Wes Craddock / SLAC