Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (06): 60205-060205.doi: 10.11889/j.0253-3219.2014.hjs.37.060205

• LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS • Previous Articles     Next Articles

Nanosecond pulse bunching system of a neutron generator

ZHOU Changgeng LOU Benchao QIU Rui KE Jianlin   

  1. (Institute of Nuclear Physics and Chemistry, Chinese Academy of Engineering Physics, Mianyang 621900, China)
  • Received:2013-10-24 Revised:2013-12-14 Online:2014-06-10 Published:2014-06-04

Abstract: Background: In order to accurately measure the neutron spectrum using time-of-flight method, a nanosecond pulse neutron generator is introduced from Efremov Institute of Electric Physics, Russia. Purpose: The nanosecond pulse ion beam current is generated by a bunching system. Some key equipments (nanosecond pulse signal source, high frequency bunching power supply, adjustment system of the negative feedback, etc.) are developed by ourselves for the localization of the components. Methods: The problem of high bunching power supply voltage is solved with bidirectional scanning technology. The negative feedback technology makes the nanosecond pulse bunching system of long-term stability. In order to measure the nanosecond pulse beam, a fast pulse Faraday cup measurement device is developed. Results: The Full Width at Half Maximum (FWHM) of the neutron generator ion beam pulse is 1.5 ns, and the pulse repetition frequency-range is 1 kHz?4 MHz, beam spot diameter is about 10 mm. Conclusion: Because the Electron Cyclotron Resonance (ECR) ion source is used in neutron generator, it has a number of advantages, such as small emittance, small energy divergency, no filament and long-time continuous working stability, which is a good experimental device for neutron physical research.

Key words: Bunching system, Ion beam, Nanosecond pulse, Neutron generator