U.S. Geological Survey, Branch Of Acquisition and Federal Assistance, Box 25046, Denver Federal Center, Denver, CO 80225-0046

66 -- INTEGRATED LASER AND BEAM DELIVERY SYSTEM SOL 00CRQQ0289 DUE 090700 POC Robert C. Valdez, (303) 236-5900 ext 424 Concerns having the ability to furnish a integrated laser and beam delivery system to activate samples for 40 Ar/39 Ar geochronologic analysis as described herein are requested to give written notification (including the telephone number for a point of contact) to the procuring office above within forty-five (45) calendar days from the date of this synopsis. The following Salient Characteristics are considered essential to this requirement. The U.S. Geological Survey, Crustal Imaging and Characterization Team, Central Region, has a requirement for an integrated laser and beam delivery system to activate samples for 40 Ar/39 Ar geochronologic analysis. Salient Characteristics are as follows: The following salient characteristics define a laser and beam delivery system that will be connected to our new state of the art argon mass spectrometer and will allow ablation of the geologic sample surface by very small diameter (1 to 200 micrometer) laser beam without heating of the surface and adversely affecting adjacent areas. The method will enable us to do laser traverse across mineral samples to determine age differences within single grains and to analyze very small minerals without heating adjacent material; this requires a Kr-F laser that produces low ultraviolet wavelength light that will adequately couple with geologic samples. The laser shall be a non-heating laser and include a laser beam delivery system custom-made to our laboratory conditions. Laser General Description. The laser shall be a KrF Excimer Laser with 248nm wavelength, 200 Hertz repetition rate, 10mJ per pulse, 2 W average power at 200 Hz. Repetition rate and output power shall be variable. Laser shall be controlled by 0-5V TTL signals supplied by the USGS laboratory. One TTL signal shall control repetition rate and one TTL signal shall control high voltage. Integrated Single Beam Delivery and Viewing System Description: The beam delivery system shall have high-reflectivity dielectric beam-steering mirrors, UV-transmitting imaging lens withfocus mounts, 10X focusing objective, 2-inch focal length focusing lens, an aperture assembly, and an attenuator assembly. There shall be an integrated coaxial imaging and illumination system and high-resolution color CCD camera with color monitor. There shall be a fiber optics iluminator. All shall have mounting hardware and fixtures and the laser and beam delivery assembly shall be mounted to base plate. Laser Beam Enclosure Description: There shall be a cover over the beam delivery optics. Upon exit from final focusing lens the laser light shall not be covered. PL-1500A KrF Excimer Laser, 200 Hz repition rate, 10 jm per pulse, 2 W avg. power at 200 Hz, Variable rep rate & output power, Laser controlled by 0-5V TTL signals supplied by customer, One TTL signal to control rep rate and one TLL signal to control high voltage, Integrated single beam delivery and viewing system with: High-reflectivity dielectric beam steering mirrors, UV-transmitting imaging lens with focus mounts, 10X focusing objective, 2-inch focal length focusing lens Aperture Assembly, Attenuator Assembly Intergrated coaxial imaging and illumination system High resolution color CCD camera with color monitor fiber optic illuminator, mounting hardware and fixtures laser and beam delivery assembly mounted to base plate Class IV laser beam enclosure: Cover over beam delivery optics. Laser light not covered after final focusing lens. Based on information available at this time, and in accordance with 41 U.S.C. 253 (1), implemented by FAR 6.302-1, the Government considers the item specified as a sole source from Potomac Photonics, Inc., 4445 Nicole Drive, Lanham, MD 20706 and proposes to negotiate a contract with that firm on that basis. However, should additional sources be identified, they will be considered. Firms who feel that they can furnish the required item or its functional equivalent (based upon the criteria specified herein) are invited to submit in writing an affirmative response to this announcement. An affirmative response would include literature, brochures and such other materials which correspond to the required items stated herein. This information will be evaluated and used to determine if competitive opportunities exist. This notice may represent the Governments only official notice of this procurement. See Notes 22. Posted 07/24/00 (W-SN478039). (0206)

Loren Data Corp. http://www.ld.com (SYN# 0598 20000727\66-0026.SOL)

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