Building MACS  Goals of the MACS project  Funding and time line  Technical overview  Possible IDG contributions  Process for IDG involvement in MACS

MACS: A versatile probe of dynamic processes in condensed matter  Maximize instrumental efficiency  Worlds most intense monochromatic cold neutron beam  Maximize solid angle and efficiency of detection system  Taylor energy band probed to scientific problem  Minimize instrumental background  From fast neutrons  From non-sample scattering  User-Friendly instrument  Reliable hardware  Streamline experimental process  Reliable software for planning, execution, and analysis

JHU 10/19/01 MACS Timeline 1993 Discussions about the possibility of a “sub-thermal” TAS on NG Analytical calculations show efficacy of double focusing at NG Initiate JHU/NIST project to develop conceptual design 1998 Top level specification for monochromator completed 1998 JHU/NIST project starts to develop Monochromator 2000 Christoph Brocker starts engineering design 2001 NIST-NSF-JHU agreement to fund MACS 2001 MACS double focusing monochromator completed 2001 MPP in place for entire project 2001 Assistant engineer on board to help Christoph Brocker 2002 Detector system prototype testing 2004 MACS Post doctoral fellow to start 2005 July: MACS complete and assembled at NIST 2006 January: MACS User program starts 2006 August: MACS project complete

JHU 10/19/01 MACS Funding

JHU 10/19/01 Spending profile by category

JHU 10/19/01 NCNR Liquid Hydrogen cold source MACS Beam New cold source to be installed in 2001 will double flux

Overview of MACS Design by C. Brocker, C. Wrenn, and M. Murbach

JHU 10/19/01 Monte Carlo Simulation of MACS Y. Qiu and C. Broholm to be published (2000)

JHU 10/19/01 Multiplexing crystal analyzer system Design by C. Brocker

One of twenty channels BeO filter Be filter PG filter Collimator 2 Collimator 1 8 o vertically focusing Analyzer crystals 8 o vertically focusing Analyzer crystals “TAS” detector Energy integrating Detector Energy integrating Detector Design by C. Brocker

JHU 10/19/01 Considerations for IDG involvement  Match to IDG expertise  Match to resources available  Simple and well defined and interfaces  Similarities to monochromator project:  Top level documentation  Collaboration with Brand, Brocker, and Broholm  Testing and documentation  Different from monochromator project:  Funding in place  Mostly direct payments from NSF grant

JHU 10/19/01 Possible IDG tasks  Cryogenic filter assembly for incident beam  Cryogenic filter assembly for detector system  Monochromator translation stage  Collimator exchanger for detection system  Double crystal spectrometer system  Neutron beam imaging system  Attenuator exchange system  Beam line slits  Entire detection system  Instrument control Software development

JHU 10/19/01 Process for IDG involvement  IDG learns about possible sub projects  IDG selects likely project(s)  Brocker, Broholm, and Brand develop top level specification  IDG presents good faith estimate of time and price  Broholm approves proposal in consultation with NIST  IDG designs builds and tests with monthly technical and financial status reporting.  Monthly payment from JHU account  Demonstrate hardware, documentation, and test results at JHU  Ship equipment to NIST  Consult during installation process