The Cold Neutron Chopper Spectrometer

1
The Cold Neutron Chopper Spectrometer
EFAC-March 2003

• Paul Sokol, Penn State University -- PI
• M. Aronson (Michigan), S.-H. Chen(MIT), R.
  Dimeo(NIST), H. Strauss(Berkely), H.
  Taub(Missouri)

http//sokol.phys.psu.edu/CNCS
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Presentation Outline

• CNCS Instrument Specifications
• Project Timeline
• Instruments Major Components/Responsibilities
• CNCS Status Picture
• Incident Beam Line
• Shielding
• Guide
• Frame Overlap Choppers
• High Speed Choppers (Double Disk/Fermi)
• Final Flight Path
• Building and Shielding
• Gannett Fleming Background
• Detector Array
• Sample Environment
• Conclusions

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Cold Neutron Chopper Spectrometer

• Range
• 1-50 meV
• Resolution
• 10-100 meV
• Incident Flight Path
• 37.5 M
• Two high speed choppers to define E
• Final Flight Path
• 3.5 M
• 140o in scattering plane
• 40o out of scattering plane

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CNCS Timeline

• Priorities
• Intensity
• Detectors
• Detectors
• Detectors
• Sample Environment
• Resolution

• CNCS Workshop
• NIST/21-22 May 2001
• Defined Instrument parameters, incident and final
  flight path, and detector coverage

• Requirements
• Reliability
• Data Analysis

• CNCS Baseline Review
• NIST/25-26 Jan 2002
• Technical, Cost, and Schedule Review (Close-out
  report)

• Simplification of components
• Guides, choppers,
• Outsourcing some activities
• Building, .

• SNS Site Visit
• PSU/17 May 2002 (Boudwin, Lawson, Pearman)
• Fixed price contract for building design

• PSU/Gannett Fleming Meeting
• PSU/7 June 2002 (Hair, Lupold, Laws, Vadovic)
• Brainstorming Alternate designs for building and
  sample environment access

• PSU/GF/SNS Conceptual Design Meeting
• Harrisburg/19 August 2002 (Dean, Morgan,
  Abernathy)
• Presented GFs conceptual design to SNS/Approval
  to continue work on new design

• PSU/GF/SNS Instrument Design Meeting
• SNS/12 December 2002
• Final Agreement/Approval on the design efforts
  for the CNCS Building, Foundation, and Sample
  Environment Access

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CNCS Status
Fermi Chopper
Incident Shielding Design
Frame Overlap Chopper
Detector Array
HSDD Chopper
Guide
Frame Overlap Chopper
Building/Shielding
Sample Environment
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Major Components/Responsibilities

• Incident Beamline
• Shielding . SNS
• Guide ... IDT
• Inserts ...... SNS
• Pulse Shaping Chopper . IDT
• Energy Selection Chopper .... IDT
• Frame Overlap Chopper IDT
• Final Flight Path
• Building/Shielding IDT
• Detector Array .. IDT
• Data Collection Electronics SNS/IDT
• Sample Environment and Access . IDT

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Incident Beam Line-Shielding

• Design in progress at SNS
• Projected completion date December 2003

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Incident Beam Line-Guide

• Design and Bidding Complete

Bids Cilas ....... Swiss
Neutron. Lesker/Mirrortron ...
400,000.00
Special Option Note Enhanced Neutron
Reflectivity Performance Option
Baseline Cost Estimate 1.190M
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Incident Beam LineFrame Overlap Choppers

• Design and Bidding Complete

Bids Juelich ...... (Conventional
Bearings) Astrium .. (Conventional
Bearings) Lesker/Mirrortron ... (Magnetic
Bearings)
175,000.00
Baseline Cost Estimate 264,377.00
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Incident Beam LineHigh Speed Choppers

• Pulse Shaping (Fermi)
• Design in Progress
• Straight Slit
• 300 Hz
• Magnetic Bearings
• Design Review May 2003
• Ready for Bid July 2003
• Procurement November 2003

• Energy Selector (Double Disk)
• Internal Review
• Ready for Bid April 2003
• Procurement July 2003
• Modified Design
• Over and under configuration
• More room for sample environment system
• Better for sample environment

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Final Flight PathBuilding and Shielding
Unrealistic
Common costing basis..
CNCS Baseline Design Building
450K/600K Final Flight Path 755K/1.1M
CNCS Final Design Building 700K/960K Final
Flight Path 0.00
Baseline Cost Estimate 1.85M/2.75M
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Gannett Fleming Background

• U.S. Naval Nanoscience Research Laboratory,
  Washington, D.C.

The facility includes more than 20 individual
laboratories consisting of Class 100 clean rooms,
quiet and ultra-quiet measurement spaces, and
supporting workspaces. In addition to isolating
the facility from external noise and vibration
sources, stringent environmental (temperature and
humidity) conditions must be maintained for
extended tests for each laboratory space.
Isolated electrical service is provided for most
equipment to avoid the influence of extra
electrical noise on measuring equipment in order
to provide high quality test data. Specific
attention has been extended to the wall and
ceiling surfaces to minimize the impact of
air-borne contamination. Sustainable design
practices have been employed to minimize energy
consumption and to use recyclable materials where
feasible.

• Gannett Fleming Facts
• Founded in 1915
• More than 1,900 employees
• 44 offices nationwide
• Headquarters in Camp Hill, PA
• 848 employees located in Camp Hill Office
• Ranked 46 among the top 500 design firms in the
  United States by the Engineering News-Record.

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Building and Shielding
(First Floor View)
(Second Floor View)

• Final Preparation for Bid
• Large cost Uncertainty

(Side View)
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Detector Array
PSU Applied Research Laboratory
http//www.arl.psu.edu
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Final Flight Path Sample
Environment

• Started Fixed-Cost () Contract with Gannett
  Fleming Inc.
• On-going coordination with SNS
• Oxford Instruments-consulting on design materials

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Summary

• On Track with design efforts

• Major Uncertainties
• Building
• Installation

• Budget
• Might have enough money

• maybe

• possibly

• hopefully.