APPARATUS FOR MEASURING TOTAL NEUTRON CROSS SECTIONS

Patent · 13 October 1959

OSTI ID:4196531

Cranberg, L

An apparatus is described for measuring high-resolution total neutron cross sections at high counting rate in the range above 50-kev neutron energy. The pulsed-beam time-of-flight technique is used to identify the neutrons of interest which are produced in the target of an electrostatic accelerator. Energy modulation of the accelerator . makes it possible to make observations at 100 energy points simultaneously. 761O An apparatus is described for monitoring the proton resonance of a liquid which is particulariy useful in the continuous purity analysis of heavy water. A hollow shell with parallel sides defines a meander chamber positioned within a uniform magnetic fieid. The liquid passes through an inlet at the outer edge of the chamber and through a spiral channel to the central region of the chamber where an outlet tube extends into the chamber perpendicular to the magnetic field. The radiofrequency energy for the monitor is coupled to a coil positioned coaxially with the outlet tube at its entrance point within the chamber. The improvement lies in the compact mechanical arrangement of the monitor unit whereby the liquid under analysis is subjected to the same magnetic field in the storage and sensing areas, and the entire unit is shielded from external electrostatic influences.

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-14-007609
• Assignee: U.S. Atomic Energy Commission
• Patent Number(s): US 2908822
• OSTI ID: 4196531
• Country of Publication: United States
• Language: English

Related Subjects

ACCELERATORS
COUNTERS
CROSS SECTIONS
ELECTROSTATICS
ENERGY
ENGINEERING AND EQUIPMENT
INSTRUMENTS
MEASURED VALUES
MODULATION
NEUTRON BEAMS
NEUTRONS
PULSES
RESOLUTION
TARGETS
TIME OF FLIGHT METHOD
VELOCITY