This notice is issued by The SLAC National Accelerator Laboratory, located in Menlo Park, California. We are soliciting responses from interested parties to provide all personnel, materials, equipment, facilities and services required to design, fabricate, test, and deliver two (2) first article units, one (1) of Slit type 1 (four blades of either Si3N4 or Ta90W10), and one (1) of Slit type 2 (eight blades, four blades Si3N4 and four blades Ta90W10). After acceptance of the first article units by SLAC, the vendor shall fabricate, test, and deliver a quantity of twelve (12) Slit systems through 2011. The technical requirements are as follows: Aperture size: 30 mm x 30 mm (maximum) -30 mm x -30 mm (minimum with full overlap) Resolution: 1 micron in full step Repeatability: ± 1.0 micron (uni-directional) ± 3.0 micron (bi-directional) Accuracy: ± 2 micron (over 3 mm) Blades: Blade material made of Silicon Nitride (Si3N4 ) or Tantalum (Ta90W10) for the type 1. Both materials for the type 2. Each blade is 3 mm in diameter with highly polished surface. Polish should be better than 25 nm RMS roughness Electrical connection: External SUB-D connector Limit switches: Limit switches on all blades incl. UHV compatible wires; UHV electrical feed-through into external 15 pin SUB-D connector Mechanical dimensions: External diameter of UHV chamber shall not exceed 202.50 mm; Distance from center to outer motor part shall not exceed 196 mm; Thickness: 140 mm. Weight: ~18 kg Motors: Externally mounted standard Nema-17 stepping motor, MDrive17Plus2 preferred. Mechanical connection: 6” CF flange on both sides as standard Outer surface: Stainless steel Blade thickness: Able to accommodate 4, 5 and 10 mm thick blades and can accommodate cylindrical blade design Mounting of blades: Blades can be mounted with the sloped edge. Encoders: Optical linear encoders. Vendors interested in performing this requirement are invited to provide the following information to SLAC Purchasing Office no later than 27 February 2009. The information may be submitted via email to the Contract Administrator at [email protected] or faxed to 650-926-8785. Responses shall include the following information: Reference number SLIT05FEB09, Company name, DUNS Number, address, point of contact, phone number and email address; business size, disadvantage, 8(a), or HUBzone status; and , Evidence that the contractor has performed similar projects (past performance history). NO TELEPHONE OR WRITTEN REQUESTS FOR SOLICITATIONS OR POSTING STATUS. This posting is for information and planning purposes and is not to be construed as commitment by SLAC nor will SLAC pay for information solicited. No basis for claim against SLAC shall arise as a result from a response to the Sources Sought or SLAC use of any information provided. SLAC reserves the right to consider a small business, 8(a) or any other set aside arrangement as deemed appropriate for this procurement.

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