National Institute of Standards and Technology, Acquisition and Assistance Division, Building 301, Room B117, Gaithersburg, MD

66 -- VIBROMETER SOL 53SBNB760023 DUE 120996 POC Trena N. Bercaw, (301) 975-6324 The National Institute of Standards and Technology (NIST) requires one non-contacting, laser based vibrometer (velocimeter) to monitor and record the instantaneous velocity of a large vibrating monochromator which sits inside an evacuated chamber (neutron flight path). The monochromator is a light-weight composite of graphite fibers that weighs less than 0.9 Kg. It spans 52.3 cm horizontally and 27.9 cm vertically. The monochromator surface is spherically curved (concave) to a radius of 211.8 cm. The monochromator is covered with chemically etched silicon wafers which can reflect laser light. The displacement amplitude of the monochromator, perpendicular to its surface, is fixed at +/- 4.5cm. The top speed of the monochromator will reach 9 meters/second at a frequency of 25 Hz. The resultant maximum acceleration will be 109 g. The vibrometer must have a resolution better than 0.001%. Because the monochromator will be situated within a strong neutron beam, it is desirable to keep the vibrometer system entirely outside the flight path. Because the required vibrometer is laser based, a small mirror can be installed within the flight path and used to reflect the laser light through an optical port. The required delivery time is 90 days after receipt of order. The FOB Point shall be Destination, Gaithersburg, Maryland. All responsible vendors may submit a quotation. Please fax or mail in all requests for a Request For Quotation Package. Fax Number (301) 963-7732. (0319)

Loren Data Corp. http://www.ld.com (SYN# 0413 19961115\66-0004.SOL)