The Model N40 is an automated, computer-controlled system which provides neutron or gamma radiation for exposing personnel dosimeter badges and calibrating radiation detection instruments. The system provides full 360º uniform irradiation in a large, well-shielded room to minimize scatter during instrument calibrations. It features steel-encased lead shielding, an eight-position source carousel, four precision linear positioning tracks, a moderation sphere, and safety interlocks. The model N40 is available with a variety of Californium, Cesium-137 and Cobalt-60 sources to match your specific needs. The below-grade source carousel is shielded with a polyester matrix of borated polyethylene.
During exposure cycles, the selected source is blown with compressed air from the carousel up to the expose head, where it is held in place by a controlled vacuum. Up to four instruments can be calibrated simultaneously. Each of the four tracks of the linear positioning system operates independently and can be set to a distance and height appropriate for a different instrument. One track also features a rotary axis.
The entire irradiator system is controlled by a simple graphical interface that provides one button calibration set up, calculates exposure rate based on distance and source size, shows irradiator status at a glance.
- Automated irradiator control software
- Eight position source carousel
- Underground source carousel shielded with a polyester matrix of borated polyethylene
- Steel-encased lead shielding
- Helix shaped transfer tube eliminates direct shine between carousel and exposure position
- D 2 O moderation sphere with removable cadmium cover
- 360º uniform neutron or gamma radiation
- Four independently-controlled instrument calibration tables
- Computer control of exposure time, attenuation, source selection, and linear positioning system
- Two axis precision linear positioning system with rotary axis on one track
- Fully programmable routines
- Video monitors to view each of the four instruments under calibration
- Laser alignment system for each of the four tracks
- Fully shielded enclosure
- Redundant and fail-safe safety interlock systems
| General Specifications | |
| Irradiator | |
| Radiation Sources | Californium, Cesium-137, Cobalt-60 |
| Shielding Type | Steel encased, lead cast cylinder; polyester matrix of borated polyethylene |
| Radiation Exposure | Less than 0.25 mR/h measured 2 inched from enclosure surface |
| Linear Positioning System | |
| Travel | all four tracks: X = 500 cm, Z = 30 cm; one track: 360º about the Z-axis |
| Precision | ±1 mm, ±0.5º |
| Motion Control | Servo motor and precision controller |
| Instrument Platform | Engraved 1 cm gridlines, tapped holes every 10 cm |
Underground Shield
Compressed Air Reservoir
Electrical and Pneumatic Controls
Source Delivery Tube
Moderation Sphere
Four Track, Nine Axis Linear Positioning System
Brookhaven National Laboratories
Idaho National Laboratories - HPIL
Savannah River Site
5940 Gateway Drive, Alpharetta, GA 30004
770-667-5770 / FAX 770-667-7539
sales@hdirad.com