xray_source_2.docx
DOCX document 16 KB Posted
- Attached to
- X-RAY SOURCES Federal contract opportunity
- Solicitation number
- 140G0325Q0096
About this file
This document is a technical specification and notice of intent for x-ray sources for the USGS Pacific Coastal and Marine Science Center. The USGS intends to purchase specific x-ray components from GeoTek Limited for their Rotating X-Ray Computed Tomography (RXCT) scanner and Multi-Sensor Core Logger, which were originally acquired in 2018 and 2003 respectively. The required items include a Thermo Kevex 130 Kv X-ray Source, Cs-137 Source, disposal of an old Cs-137 Source, and onsite installation with system realignment and training.
The solicitation (No. 140G0325Q0096) is a special notice for a single-source procurement, with GeoTek Limited identified as the sole qualified vendor due to their proprietary system design. The x-ray source specifications include detailed technical requirements such as maximum tube voltage of 130 Kv, operating voltage range of 45-130 Kv, and a minimum spot size of 6 microns. Responses must be submitted electronically to yangzhideng@usgs.gov by May 12, 2025, at 1500 PST, with the NAICS code 334517 for Irradiation Apparatus Manufacturing. The procurement will support USGS research in geologic hazard and mineral resource assessments.
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The USGS Pacific Coastal and Marine Science Center (PCMSC) acquired a GeoTek Rotating X-Ray Computed Tomography (RXCT) scanner in 2018 for approximately $650,000 and GeoTek Multi-Sensor Core Logger (MSCL) in 2003 (upgraded in 2012, and 2024) for approximately $350,000 (amount includes upgrade costs). The RXCT is only CT machine across all USGS labs. By having both the RXCT and MSCL together in the same lab, the PCMSC Core Lab stands out as a top core lab in the United States. These machines routinely support research regarding, geologic hazard and mineral resource assessments across several USGS mission areas. Therefore, these GeoTek scanners not only help the USGS protect human life and infrastructure but also facilitate management of mineral resources. The required items and the technical specifications are the following:
· Thermo Kevex 130 Kv X-ray Source for RXCT S/N21
· Cs-137 Source for MSCL-S and MSCL-SXZ
· Disposal of Old Cs-137 Source
· Onsite installation/system realignment and training
1. The Thermo Kevex PXS10-WB X-ray source is the only source that Geotek uses in their Rotating X-ray Computed Tomography System.
2. Maximum tube voltage: 130 Kv
3. Operating volt range: 45-130 Kv
4. Tube current operational range: 0-500uA µA
5. Maximum Power output: 65W
6. Minimum spot size of 6 microns at 4 watts, for high-resolution imaging
7. X-ray beam angle: 115°, round beam
8. Focus to object distance: 10.0 ±0.5mm
9. Target material: Tungsten
10. X-ray output window material: Beryllium
11. Input power: 24-26 VDC, ^A max
12. Control interface: RS-232
13. Small, round spot optimized over the range of operating voltage and power, for sharp, distortion-free images
14. 14mm spot to window spacing, for high geometric magnification
15. X-ray tube, power supply, and control electronics combined into one compact package, for easy system integration easy
16. Option to rotate the tube head +90° or -90° relative to home position, for flexible configuration and installation
17. Auto-conditioning, for protection of the source during start-up
18. Digital interface, for easy access to diagnostics and operating logs
File details come from the government source that posted it. Updated .