BSS
BSS
ELSE NUCLEAR
Bonner Spheres Spectrometer
The Bonner Sphere Spectrometer consists of an array of He-3 proportional counter thermal neutron detectors, each housed in a spherical HDPE moderator of different diameters.
BSS is proposed in two main configurations, adjustable according to the requirements, for single or multiple detectors.
An unfolding software (RUFUS), used to calculate the neutron spectrum, is also available for both configurations.
Each proportional counter is connected to a compact electronic module (2.5 cm diam. x 7.6 cm), providing:
- Precision wide band charge sensitive pre-amplifier and amplifier
- Twelve-turn trim pot to finely tune the high voltage (0-2200 V) to the desired level to obtain a good high-voltage plateau
- Discriminator circuit that produces, when a charged event is detected, a TTL pulse
- Amplifier gain control trim pot controlling the discriminator level
- Analogue monitoring test point allowing direct monitoring of amplified signal using an oscilloscope
- Test point to measure the high voltage setting
A user-friendly dedicated acquisition software can be installed on the PC managing the BSS, allowing the user to start and stop the measurements, to modify the parameters and to visualise the saved data.
The BSS standard set, designed to cover the neutron energy range from 1 meV to < 100 MeV, includes the following HDPE moderators: Ø 3”, Ø 3.5”, Ø 4”, Ø 4.5”, Ø 5”, Ø 6”, Ø 7”, Ø 8”, Ø 10”, Ø 12”, Ø 15”, Ø 18”.
Key features:
- Worldwide standard
- Turnkey solution
- Customisable moderator assembly and quantity
- He-3 proportional counter detector
- HDPE spherical moderators, from Ø 3” to Ø 18”
- Accessory extension set for energy range up to 10 GeV
- Proprietary unfolding code available
- Optional special electronics for use in pulsed fields
Click below to request a quote for this item. Or for product advice, stock and lead time enquiries call our team on 0330 313 3220.
| Attribute | Value |
|---|---|
| Configurations |
Single detector: includes only one He-3 proportional counter, to be inserted in one moderator sphere at a time. The detector is managed by a Counter Module and the user interface is the “Single counter” software. Multiple detectors: includes up to 16 He-3 proportional counters, and up to 16 moderator spheres (12 standard + 4 accessory), to be employed at the same time. The detectors are managed by a Datalogger and the user interface is the “DLOG” software. |
| Options |
8 atm gas filling pressure for higher sensitivity Special electronics (with no dead time) for use in pulsed fields |
| Accessories |
Bonner sphere set for extension to 10 GeV Ø 3” HDPE inner moderator, 1” lead shell, Ø 7” HDPE outer moderator Ø 4” HDPE inner moderator, 0.5” lead shell, Ø 7” HDPE outer moderator Ø 4” HDPE inner moderator, 1” lead shell, Ø 8” HDPE outer moderator Ø 4” HDPE inner moderator, 0.5” copper shell, Ø 7” HDPE outer moderator Unfolding code for automatic spectra and H*(10) calculation Response functions obtained via Monte Carlo simulations Flight case |
| Attribute | Value |
|---|---|
| Data Sheet | Click here to view |
