LQ R

1
LQ RD Plans (focused on Magnet Structure)
Giorgio Ambrosio
Long Quad Magnet Structure Review Nov. 28-29,
2007

• OUTLINE
• LQ support structure plans
• LQ coil fabrication plans
• Risk analysis
• Schedule and budget

2
Advantages of each structure

• Each TQ structure has unique advantages
• Partial list of features that could benefit to
  the LQ plan
• Shell-based structure
• - TQS02 exceeded the 200 T/m goal with 10
  margin (4.5 K)
• - Very short magnet assembly/disassembly time
• Attractive features for LQ01
• Collar-based structure
• - All TQC models reached 200 T/m
• - Can provide short-term test of long Nb3Sn coil
  alignment
• Attractive for LQ02/3

3
Plan Overview

• LQ01 with shell-based structure
• Achieve LQ target gradient with structure
  allowing quick exchange of coils (if needed)
• LQ02 with collars-based structure, with LQ01
  coils
• Demonstrate more accelerator magnet features with
  long Nb3Sn coils
• Significant savings by reusing LQ01 coils
• LQ03 with shell-based structure if LQ01 will be
  successful
• Demonstrate reproducibility using new coils

4
Plan - I

• LQ01 (shell-based structure) plan
• Structure design, fabrication, assembly with
  dummy coils at LBNL
• Test at LN with dummy coils of short model
  (LBNL), or whole structure (BNL) - (FY08
  contingency)
• LQ01 assembly at BNL (FY08 cont. or FY09)
• LQ01 test at 4.5 K at BNL
• Shipment of LQ01 to FNAL
• Possible test at 2.5 K (1.9 K) at FNAL
• Presently has low probability
• Disassembly at FNAL

FY08
FY09
5
Plan - II

• LQ02 (collar-based structure) plan
• Long-lead items procurement at FNAL (FY08)
• Structure procurement at FNAL (FY08 contingency)
• Assembly using LQ01 coils at FNAL
• Test at 4.5 K and 2.5 K, (1.9K) at FNAL
• LQ03 plan
• Structure will depend on LQ01 (LQ02) results
• New coils

FY08
FY09
6
Coil Fabrication Plans

• I would like 8 coils available for LQ01
• Spare set in case of damage to 1st set during
  magnet assembly or operation (QP failure)
• Spare coils available in case of LQ limited by
  poorly performing coil(s)
• Two coil fabrication lines (at least RectImp)
• Avoid risk of long delays in case of equipment
  failure or reduced availability
• Build larger flexibility for LARP magnet RD

7
Coil Fabrication Plans - II

• 5M cap FY08 plan
• 6 coils WindCure at FNAL
• 4 coils ReactImpr at FNAL
• 2 coils ReactImpr at BNL
• 1 Practice coil at FNAL, 1 Practice coil at BNL
• 1.5M contingency
• Use will be considered for Q3 and Q4
• Coils 7 and 8

8
Advantages of Proposed Plan

• Larger probability of success within FY09 by
  developing both structures
• See risk management
• We are building a large and unique set of
  expertise and experimental data for the design of
  the structure for the LHC phase-II upgrade
• All 3 labs are strongly involved with this plan
• ? the best intellectual contribution from all
  experts
• ? very high level of internal scrutiny

9
Risk Analysis - I

• The shell-based structure (LQ01) has some
  modifications and new features with respect to
  TQS models. Risks and probability
• Failure Low
• Large experience and expertise with
  shell-structures and the LRs
• Test with dummy coils (FY08 contingency)
• Limited performance Medium
• Modifications are mainly on the cross-section,
  and we have a good understanding 2D FEM analysis
• Possible unexpected scale up issues
• Delays Medium-High
• Schedule is tight, there are new parts, and some
  assembly procedures are different from those used
  for LRS02 and the TQS

10
Risk Analysis - II

• LQ02 will use a collar-based structure, TQC
  models have not exceeded 200 T/m. Risks and
  probability
• Failure Low
• Same design and procedures of TQC models
• Limited Performance Medium
• All TQC models reached 200 T/m
• The introduction of coil alignment features
  increases this risk (successful test in future
  TQCs may reduce it)
• Delays Medium-Low
• Same parts and procedures used for TQC models,
  applied to long coils

11
Risk Analysis - III

• The plan to use LQ01 coils in LQ02 has some risks
  because coils could be damaged or degraded
• Limited performance Medium-low
• The possibility of TQS?TQC coil exchange was
  successfully proven by TQC01b and TQC02E
• Modifications TQS?LQS structure should reduce the
  risk of permanent degradation (high stress in
  outer layer)

12
Risk Management Features - I

• Collar-based structure available by the end of
  FY08
• When making plans for FY09 we will be able to
  assess the status of the shell-based structure
  and adjust plans in case of large delays
• Availability of 4 spare coils by LQ01 test date
  provide options in case of limited performance of
  LQ01
• Replace limiting coils and repeat the test
• If limited performance due to some coils
• Move to LQ02 with new coils
• If limited performance due to structure/assembly

13
Risk Management Features - II

• Use of coil-alignment features in LQ02 will be
  based on performance of LQ01 and future TQC
  models
• In case of successful LQ01 we can take more risks
  with LQ02, otherwise we will be very conservative
• Choice of LQ03 structure will be based on LQ01
  performance

14
Notes

• The LARP magnet RD has some delays
• LQ practice coils will be completed in March 08
• No TQ03 series
• we still want to meet the 2009 deadline
• ? need to invest more resources in the LQ
• Implemented through the risk management features
  of the proposed plan
• The proposed plan allowed us to start FY08 with
  a plan
• We have developed detailed budget, schedule, task
  sheets

15
Schedule Budget
2008 2009

FY08 budget (without contingency) 3.4M
16
Extra slides
17
FY08 Long Quad Organization

• LQ raised to L2 area
• LQ should be a projectized task
• Weekly conf-calls to check progress, and discuss
  problems and next steps
• Task sheets used as MOU between LARP and the
  Labs.
• Tasks made of sub-tasks with start/end dates,
  budget, and resources
• Budget officer will generate expected spending
  profile (MS and labor at each lab), and compare
  monthly expenses

18
LQ Task Sheets