Optimizing the collimator/shielding configuration of the NG-430 neutron generator

Konobeevsky, E. S.; Latysheva, L. N.; Sobolevsky, N. M.; Ilić, R.

doi:10.3103/s1062873811040277

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…E.S.Konobeevsky et al, have optimized the collimator and shielding of the NG 430 neutron generator at the Institute for Nuclear Research, Russian Academy using the MCNP5 and SHIELD transport codes [2]. D.L.…”

Section: Introductionmentioning

confidence: 99%

“…The studied parameters were; (1) the shielding-collimator material; three materials were studied; Iron, Tungsten, and Tungsten alloy (90% Tungsten, 7% Nickel, and 3% Iron), (2) the distance between the shielding-collimator assembly's first plate and the center of the neutron beam; the distance was varied from 0.1 cm to 5.6 cm with 56 bins, while the other distances were set to be functions of the studied distance, and (3) the thickness of shieldingcollimator sheets; two thicknesses for each plate were studied 4 cm and 5 cm. The criterion upon which the different collimator parameters were evaluated was based on the ratio between the flux read by the detector and the flux reaching the sample for both neutrons and gammas, such ratio was defined as the Q-value.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimization of Shielding- Collimator Parameters for ING-27 Neutron Generator Using MCNP5

2018

View full text Add to dashboard Cite

Abstract. Neutron generators are now used in various fields. They produce only fast neutrons; D-D neutron generator produces 2.45 MeV neutrons and D-T produces 14.1 MeV neutrons. In order to optimize shielding-collimator parameters to achieve higher neutron flux at the investigated sample (The signal) with lower neutron and gamma rays flux at the area of the detectors, design iterations are widely used. This work was applied to ROMASHA setup, TANGRA project, FLNP, Joint Institute for Nuclear Research. The studied parameters were; (1) shielding-collimator material, (2) Distance between the shielding-collimator assembly first plate and center of the neutron beam, and (3) thickness of collimator sheets. MCNP5 was used to simulate ROMASHA setup after it was validated on the experimental results of irradiation of Carbon-12 sample for one hour to detect its 4.44 MeV characteristic gamma line. The ratio between the signal and total neutron flux that enters each detector was calculated and plotted, concluding that the optimum shielding-collimator assembly is Tungsten of 5 cm thickness for each plate, and a distance of 2.3 cm. Also, the ratio between the signal and total gamma rays flux was calculated and plotted for each detector, leading to the previous conclusion but the distance was 1 cm.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of Shielding- Collimator Parameters for ING-27 Neutron Generator Using MCNP5

2018

View full text Add to dashboard Cite

show abstract

Cryogenic setup for MJ class laser targets

et al. 2019

View full text Add to dashboard Cite

The cryogenic system for maintaining a target at a constant temperature in the range 5–25 K after shutting off the pulse tube (PT) cryogenic refrigerator is developed and tested. The temperature stability at the sample is ±2 mK for at least 20 hours. The cryogenic setup consists of cryostat, PT cryocooler, liquid helium vessel, helium gas supply, thermo-radiation shield, thermal resistance. The system provides 0.25 W of cooling power at the target. The appropriate thermal resistance should be used for different temperatures. The designed operation mode is 3 minutes off and 15 minutes on. The deactivation of PT cryocooler allows to achieve the target position stability of 1 micrometer or less during the X-ray characterization. The effect of neutron-shield was estimated using Monte-Carlo simulation.

show abstract

Optimizing the collimator/shielding configuration of the NG-430 neutron generator

Cited by 2 publications

References 0 publications

Optimization of Shielding- Collimator Parameters for ING-27 Neutron Generator Using MCNP5

Optimization of Shielding- Collimator Parameters for ING-27 Neutron Generator Using MCNP5

Cryogenic setup for MJ class laser targets

Contact Info

Product

Resources

About