National Institute of Diabetes, Digestive & Kidney Diseases (NIDDK), Acquisition Management Branch, Natcher Building, 45 Center Dr., MSC 6600, Room 6AN32, Bethesda, Maryland 20892-6600

66 -- 14.1 TESLA 89-MM WIDE-BORE NMR MAGNET SYSTEM SOL NIH-NIDDK-00-561 DUE 071700 POC Patricia Haun, Purchasing Agent, 301-594-8855 The National Institutes of Health (NIH), National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) has a requirement to purchase a 14.1 Tesla 89-mm wide-bore superconducting NMR magnet system. The magnet system shall consist of the main magnet and superconducting shim coils contained in a low-loss cryostat; vibration-isolation supports for the magnet; accessories for monitoring cryogen levels within the cryostat; the initial cooldown and charging of the magnet, a liquid helium transfer line for periodic helium fills; and a room temperature shim set for fine adjustments of the magnetic field homogeneity. The magnet system must meet the following specifications: 1) The magnet shall be a persistent, superconducting magnet operating at liquid helium temperature at atmospheric pressure, with a vertical room-temperature bore with an accessible inner diameter greater than 88mm. The field strength in the center of the magnet shall be 14.1 Tesla (600 MHz proton NMR frequency). 2) The drift rate of the magnetic field after one month of operation shall be less than 10 Hertz per hour at the proton NMR frequency. 3) The magnetic field homogeneity at the center of the field shall be better than 0.2 ppm (half-height NMR line width) over a cylindrical volume with 2 cm diameter and 2 cm length. This specification shall be achieved with superconducting shim coils installed within the cryostat only, not with room temperature shims. 4) The consumption of cryogens to maintain superconductivity under normal operating conditions shall not exceed 60 liters of liquid helium per 90 days and 120 liters of liquid nitrogen per 14 days. Cryogen level meters for both helium and nitrogen shall be included. A vacuum-insulated liquid helium transfer line for helium fills shall be included, compatible with standard liquid helium tanks. 5) The magnet shall be supported on anti-vibration legs such as those provided for this purpose by Technical Manufacturing Corporation (TMC legs). 6) Shipping, assembly, installation, cooling, charging, and adjustment of superconducting shims for optimal field homogeneity shall be included. 7) The room-temperature shim set shall include at least 26 gradient channels. The inner diameter of the room-temperature shim tube shall be approximately 73 mm or greater. A power supply to drive the shim set and all necessary cables shall be included. It shall be possible to control the shim power supply through the Spinsight 4.1 software and accessory controller hardware of an existing Varian/Chemagnetics CMX Infinity NMR spectrometer console, which will be used in conjunction with the 14.1 Tesla magnet system. In addition to meeting the above specifications, any potential supplier of the magnet system shall provide the following information with its bid: (a) A diagram of the fringe fields produced by the magnet. It is desirable that the distance from the magnet center to the 5 Gauss field line not exceed 4.0 meters in the horizontal direction and 5.0 meters in the vertical direction; (b) The minimum celing height required for installation and operation of the magnet. The supplier shall state whether it is possible to install and operate the magnet with a 3.1 meter (10 foot, 2 inch) ceiling height. If installation and operation with a 3.1 meter ceiling height is only possible at extra cost, then this extra cost should be quoted as a separate, optional item; (c) A diagram showing the exterior dimensions of the magnet system and the location of the center of the field; (d) The dimensions and weights of crates and other large items that must be transported to the magnet installation site, including the crate containing the magnet itself; (e) A list of customers who have purchased wide-bore 14.1 Tesla magnets from the supplier. This notice is for the purchase of commercial equipment within the simplified Acquisition Threshold of up to $5 million dollars. It is anticipated that Request for Quotation (RFQ) NIH-NIDDK-00-561 will be available fifteen (15) days after the publication date of this synopsis. Receipt of quotations will be due ten days (10) after the release of the RFQ. The anticipated award date is July 28, 2000. Request for copies of the RFQ must be in writing and may be FAXED to 301-480-4226. Quotations must be submitted in writing to the National Institute of Diabetes and Digestive and Kidney Diseases 6705 Rockledge Drive, Building One, Room 8048, Bethesda, Maryland 20817-7973 Attention: Patricia Haun. FAX quotations must contain offerors names, address, phone number and fax number. FAX quotations will only be accepted if dated and signed by an authorized company representative. Posted 06/20/00 (W-SN466450). (0172)

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