XCS Aymeric ROBERT 1 LUSI X-ray Correlation Spectroscopy Instrument Advanced Procurement Review : Large Offset Monochromator Aymeric ROBERT – XCS Instrument Scientist Eric Bong – XCS Lead Engineer April, 2009

XCS Aymeric ROBERT 2 XCS Instrument Overview 600 mm 30 mm 3 mm ( Floor ) 1400 mm 2x 2 mm

XCS Aymeric ROBERT 3 XCS Large Offset Monochromator Transport Tunnel FEH Hutch 4 The LUSI monochromator is an important component of both the XCS and XPP Instruments. The design of both monochromator should be to the extent possible similar The monochromator shall be operated with a fixed horizontal large offset of 600 mm as well as an independent rotation of the two parallel crystals The monochromator shall provide a monochromatic beam in the range from 4kev up to 25keV The overall length of the monochromator should be as small as possible 2.4. The monochromator should accommodate Silicon and/or Diamond single crystals in (111) and (220) orientations over the full range of energy described in The possibility of having permanently 2 different crystals should be investigated

XCS Aymeric ROBERT 4 XCS LO-Mono Methodology Produce Physics Requirement Document P3 SLAC plan to contract design/build Write ESD & purchase docs for design/build Multiple vendors expressed interest in mover design/build Investigate previous solutions Done at ANL, ESRF, DESY Same approach as ANL for the procurement But DESY’s recent concept

XCS Aymeric ROBERT 5 XCS Large Offset Monochromator Safety –Preliminary concept Set low current trip threshold of motors (software) Training to become authorized to repair –Installation Need to coordinate with vendor regarding the hazards associated with monochromator installation, initial turn on and rigging –Seismic The entire system will be reviewed and approved by SLAC for seismic safety –Electrical NRTL, SLAC Inspection and approval

XCS Aymeric ROBERT 6 XCS Large Offset Monochromator Transport Tunnel FEH Hutch 4 Device Location : X-ray Transport Tunnel –LO-Mono relocated closer in March 2009 –Approx 40 meters upstream the sample. –Same concrete slab as all the optical components of the XCS instrument. –Expected Temperature stability : ±1F –Vibration spectrum, not known yet : the FEH hutches and utilities supplies are not built yet. Should be completed end of this year.

XCS Aymeric ROBERT 7 XCS Large Offset Monochromator Transport Tunnel FEH Hutch 4 Conceptual Design based on experience : no commercial item available Kohzu, BL24XU, Spring-8 Troika, ID10B, ESRF Currently getting build

XCS Aymeric ROBERT 8 XCS Large Offset Monochromator Transport Tunnel FEH Hutch 4 Conceptual Design Possibilities 1st approach (ESRF/APS) –First crystal is fixed –Second crystal translates all the way 2nd approach (Kohzu) –First Crystal translates all the way –Second crystal is fixed 3rd approach (DESY) –First crystal is translates half the length –Second crystal translates half the length –X-ray beam is always going to a fixed center, which might be useful for alignment XCS prefers the DESY approach

XCS Aymeric ROBERT 9 XCS Large Offset Monochromator Transport Tunnel FEH Hutch 4 Translation of both crystals to cover the entire energy range

XCS Aymeric ROBERT 10 XCS Large Offset Monochromator Transport Tunnel FEH Hutch 4 Monochromator Crystals The approach is to get 2 different crystals permanently installed in the monochromator Full cover of the energy range Si(111) and Si(220) Moderate length of the LO-monochromator More flexibility in terms of coherent illumination conditions

XCS Aymeric ROBERT 11 XCS Large Offset Monochromator Transport Tunnel FEH Hutch 4 Minimizing the length and crystals travel –The full range can be covered with the use of two different crystals.

XCS Aymeric ROBERT 12 XCS Large Offset Monochromator Transport Tunnel FEH Hutch 4 2 crystals : more adapted to coherent scattering experiments

XCS Aymeric ROBERT 13 XCS Large Offset Monochromator Transport Tunnel FEH Hutch 4 The documentation prepared by the XCS instrument integrated team is “deeply” inspired from the documentation Produced by the APS for a large offset monochromator 1 st and 2 nd crystal motions description

XCS Aymeric ROBERT 14 XCS Large Offset Monochromator Transport Tunnel FEH Hutch 4 Crystal Motion Requirements Diagnostics for alignment –The design should include some diagnostics aiding the alignment of the LO-mono. –SLAC is already providing upstream and downstream diagnostics –Need for a design (based on LUSI existing diagnostics design and performances) to be located at the central point (Screen + diode)

XCS Aymeric ROBERT 15 XCS Large Offset Monochromator Transport Tunnel FEH Hutch 4 Additional Requirements

XCS Aymeric ROBERT 16 XCS Large Offset Monochromator Engineering Specifications

XCS Aymeric ROBERT 17 Acquisition Strategy The Large Offset Monochromator will be procured as a Design/build contract. To sole or not to sole source… Current plan is to go out for bid

XCS Aymeric ROBERT 18 Status of Discussions with Vendors Cost based on ANL Offset Monochromator Potential Vendors : Accel –Interested in bidding on contract –Has built similar equipment JJ X-Ray –Interested in bidding on contract Oxford Instrument –Will send RFQ KTC (US Vendor) –Interested in bidding on contract –Precision motion experience –No monochromator experience

XCS Aymeric ROBERT 19 XCS Large Offset Monochromator XCS Large Offset Monochromator Procurement Specification

XCS Aymeric ROBERT 20 XCS Large Offset Monochromator Schedule Possible advanced schedule Must re-baseline P3 schedule to validate advanced schedule

XCS Aymeric ROBERT 21 XCS Large Offset Monochromator Vendor Selection Criteria : identical to XPP procurements CriteriaMaxExcellentGoodFairPoorUnacceptable Compliance with technical requirements & specifications Personnel, experience, facilities Delivery and milestone schedule Quality Plan Cost Excellent -Comprehensive and completer; meets or exceeds all requirements; exemplifies complete understanding of the requirements; and demonstrates in detail how to accomplish task Good -Generally meets or exceeds requirements; omissions are of minor consequence or small; would be likely to produce an acceptable end item Fair -Omissions are of significance, but are correctable; substantiation of points is weak or lacking; probability of successful effort is marginal Poor -Gross omissions; failure to understand problem areas; failure to respond to requirements; little or no chance of success in completing the end item Unacceptable -Does not meet the specifications