National Institutes of Health, National Heart, Lung, and Blood Institute, Contracts Operations Branch, 6701 Rockledge Drive, Room 6100, MSC 7902, Bethesda, MD 20892

66 -- MAGNET AND INTEGRATED GRADIENT SHIMS SYSTEM SOL NHLBI-PS-2000-631 DUE 072100 POC Mr. Livie V. Spearman, III, Contract Specialist, (301) 435-0352; Ms. Debra C. Hawkins, Chief, Procurement Section, (301) 435-0366 WEB: Requests For RFP, spearmal@nhlbi.nih.gov. E-MAIL: hawkinsd@nhlbi.nih.gov, spearmal@nhlbi.nih.gov. It is the intent of the National Heart, Lung, and Blood Institute to purchase a Magnet and its integrated gradient and shim system, to be part of a 1.5T MRI Scanner for the Laboratory of Cardiac Energetics, Division of Intramural Research. The specifications for the Magnet and Gradient are as follows: Section I -- Specifications for the 1.5 Tesla Magnet, a) The magnet should provide a constant magnetic field of 1.5T at its center. The diameter of its inner open bore should be 900 mm or larger. Its overall length should be less than 2m. b) The system must include all cryogenic equipment, such as cryocooler, compressor and cryogen liquid level monitoring devices. It should also include emergency quench units, magnet power supply, and any other equipment that is needed to bring the magnet to, and maintain it at, its constant field level, & ensure safe ramp down in the case of quenching. c) Installation of magnet on site and consultation with NIH staff to ensure that the proper site requirements for the magnet are met. This includes bringing the magnetic field to a persistent level of 1.5 T, and installation of all associated equipment, as described in section b). On-site acceptance test procedure, including field homogeneity and stability tests are required. d) Magnet shimming and field homogeneity tests should be performed with the gradient coil in place. e) Field homogeneity specifications with the gradient coil in place: the standard deviation in a 35 cm DSV should be below 20 Hz (or 10Hz). The peak-to-peak range in a 35 cm DSV should be less than 2 ppm. f) The magnet's field drift should be less than 0.1 ppm/hour. g) The minimum time interval between helium refilling should be more than 6 months, with helium boiloff rate. h) Warranty information and maintenance contracts related to the magnet are to be specified. Section II -- Specifications for the Gradient and Room-Temperature Shim Systems -- A 40cm inner-bore actively shielded gradient coil/RT shim coil system should be installed in the 1.5T magnet. The gradient coil can be driven with our existing amplifiers of 200 A peak current, 300 V peak voltage, or by an amplifier system you supply. An existing chilled-water cooling system (Neslab Coolflow System II) is available for cooling the gradient coil. The following are requirements on the gradient coil and RT shims: a) The gradient coil should have a 40 cm diameter inner clear bore. b) The room-temperature shim coils should include z0 (for B0 eddy current compensation), and second order shims including z2, zx, xy, xz, x2-y2. The z0 coil should be able to provide 30 ppm field with 2 A input. The second order shim coils should each be able to provide more than +/-10ppm field in 40 cm DSV with 2 A input. The response time of all shim channels should be 10 microsec or less. c) For each axis, the gradient field should be within +/- 3% of the linear function within a 20cm DSV around the iso-center. d) The gradient strength of each axis should exceed 5 G/cm/100A. e) The maximum gradient ramp rate should exceed 500 mT/m/ms. This should be realized either with our existing amplifiers of 200A peak current and 300V peak voltage, or an amplifier system you supply. f) Sufficient cooling measures and temperature monitoring should be built into the gradient coil so that it can operate at near peak gradient strengths and slew rates on all 3 axes continuously. The gradient coil should have embedded thermosensors for temperature monitoring. g) To assess potential external eddy currents, information on the external fields generated by the gradient coils, such as vector field plots external to the gradient coil is required. h) To assess potential eddy currents, actual measurements or tolerances on couplings between the gradient coils and shim coils is required. i) Information on the isolation between the three gradient channels, e.g., mutual inductances between the gradient coils is required. j) Performance references, if they exist, on prior identical or similar gradient coils built by your company is required. k) The gradient coil should be rigidly mounted in the magnet. The solicitation, negotiation and award of this requirement will be in accordance with Federal Acquisition Regulations (FAR) Part 12, Acquisition of Commercial Item procedures. The award of a firm, fixed-price type contract is anticipated. There are no set-aside restrictions for this requirement. The applicable Standard Industrial Classification code (SIC) is 3845, size standard 500 employees. Interested parties must request a copy of the solicitation, number NHLBI-PS-2000- 631, from the following address: Attention: Mr. Livie V. Spearman, III., U.S. Department Of Health & Human Services, Public Health Service, National Institutes of Health, National Heart, Lung, & Blood Institute, Division of Extramural Activities, Contracts Operations Branch, Procurement Section, Rockledge II Centre, 6701 Rockledge Drive, Room 6148, Bethesda, MD 20892-7902. Requests for copies of the solicitation must be in writing and may be requested by FAX to (301) 480-3345 and will only be accepted if dated & signed by an authorized company representative. The solicitation will be available approximately ten (10) calendar days from the publication date of this synopsis. The solicitation will be released to all offerors requesting a copy. All responsible sources may submit a proposal, which if timely received shall be considered by the agency. Posted 07/06/00 (W-SN472037). (0188)

Loren Data Corp. http://www.ld.com (SYN# 0223 20000710\66-0001.SOL)