# Presentation: 142449

## Interaction Region Quadrupole Cryostats(WBS 2.1.1.2)

- _Thomas H. Nicol_

## Organization (or “You are here”)

**WBS 2.1**
**Magnet Fabrication**
**& Test**

**2.1.2.3**Spool
- Assembly

**2.1.2.2**Corrector
- Magnets

**2.1.2**
- New Spools

**2.1.1.4**
- Q1 to Q5
- Fabrication

**2.1.2.1**
- HTS Leads

**2.1.1.1**Cold Mass

**2.1.1.2**Cryostat

**2.1.1.3**
- MTF Test
- Stand

**2.1.1**Q1 to Q5
- Quadrupoles

**2.1.3**
- Project
- Management

## New IR magnets and spools

**Q1—Q2—X3—Q3**
**(mirror image about IP not shown for space)**

- Two triplets, Q1 through Q3 with one new spool, mirrored across the IP.
- Two new quadrupoles, Q4 and Q5 each with a new spool translated across the IP.

## Scope of work

- Design and build two sets of IR quadrupole cryostats for magnets based on LHC collared coil assemblies plus one spare set (3 total).
- Each set consists of 5 quadrupoles, Q1 through Q5, i.e. 15 cryostats total – including 5 spares.

## Initial design criteria

- Designed in accordance with the ASME Boiler and Pressure Vessel Code.
- Design maximum allowable working pressure (MAWP):
- Single phase: 200 psi
- Two phase: 50 psi
- LN2 shield: 100 psi
- Heat load to 4K:
- 5 W per device (quad, spool, etc.)
- Operating pressures:
- Single phase: 16 psig
- Two phase: 5 psig

## Triplet layout from lattice

## Cryostat cross section

## Cryostat solid model cross section

## Q2 non-IP end

- Two phase supply

- Two phase annular shell

## Support post to cold mass interface

## Q2 isometric view

- Cold mass supports

- External supports and lift points

## Key milestones

- Complete conceptual design – June 2004.
- Place order for vacuum vessels – February 2005.
- Begin production of first cryostated magnet – August 2006.

## Critical path items

- Conceptual design completion.
- Vacuum vessel order placement.
- Start of production.

## Cryostat schedule

## Cryostat cost

## Cryostat labor

## Cost and schedule summary

- Schedule:
- Conceptual design: March 2004 – June 2004
- Detailed design (including interconnects): June 2004 – August 2005
- Procurement: February 2005 – May 2006
- Engineering, design, and parts procurement costs:
- M&S: $701K (all in FY05 and 06, does not include spares)
- EDIA: $774K (all in FY05 and 06, includes procurement oversight)
- Engineering and design manpower requirements:
- Engineers: 1.6 FTEs in FY05, 1.1 in FY06
- Designers and drafters: 2.1 FTEs in FY05, 1.1 in FY06
- Ongoing effort after FY06 is part of the production effort

## Risk analysis

**Risk**
- Insufficient resources applied to engineering and design drafting early in the design phase.
- Suspension system not adequate.

**Mitigation**
- Define and allocate resources during conceptual design phase.
- Include prototype testing in early detailed design phase.

##    Summary

- The cryostat design is a straightforward extrapolation of similar work on the Tevatron, SSC, TESLA, and LHC projects.
- Cost estimates are based on detailed, parts-level estimates made for LHC cryostats adjusted for design differences.
- Resources are in place and already involved in the BTeV quadrupole cryostat conceptual design effort.
- Experienced staff in:
- Engineering
- Procurement
- Production
- Test