TITLE

Neutron Counter Based on Beryllium Activation

AUTHOR(S)
Bienkowska, B.; Prokopowicza, R.; Scholz, M.; Kaczmarczyk, J.; Igielski, A.; Karpinski, L.; Paduch, M.; Pytel, K.
PUB. DATE
August 2014
SOURCE
AIP Conference Proceedings;2014, Vol. 1612, p105
SOURCE TYPE
Conference Proceeding
DOC. TYPE
Article
ABSTRACT
The fusion reaction occurring in DD plasma is followed by emission of 2.45 MeV neutrons, which carry out information about fusion reaction rate and plasma parameters and properties as well. Neutron activation of beryllium has been chosen for detection of DD fusion neutrons. The cross-section for reaction 9Be(n, a) 6He has a useful threshold near f MeV, which means that undesirable multiple-scattered neutrons do not undergo that reaction and therefore are not recorded. The product of the reaction, 6He, decays with half-life T1/2 = 0.807 s emitting particles which are easy to detect. Large area gas sealed proportional detector has been chosen as a counter of ß-particles leaving activated beryllium plate. The plate with optimized dimensions adjoins the proportional counter entrance window. Such set-up is also equipped with appropriate electronic components and forms beryllium neutron activation counter. The neutron flux density on beryllium plate can be determined from the number of counts. The proper calibration procedure needs to be performed, therefore, to establish such relation. The measurements with the use of known ß source have been done. In order to determine the detector response function such experiment have been modeled by means of MCNP5 - the Monte Carlo transport code. It allowed proper application of the results of transport calculations of ß- particles emitted from radioactive 6He and reaching proportional detector active volume. In order to test the counter system and measuring procedure a number of experiments have been performed on PF devices. The experimental conditions have been simulated by means of MCNP5. The correctness of simulation outcome have been proved by measurements with known radioactive neutron source. The results of the DD fusion neutron measurements have been compared with other neutron diagnostics.
ACCESSION #
97625560

 

Related Articles

  • Sub-Barrier Fusion Calculations for the 9Li+70Zn System. Balantekin, A. B.; Kocak, G. // AIP Conference Proceedings;11/11/2008, Vol. 1072 Issue 1, p289 

    Sub-barrier fusion cross sections for the 9Li+70Zn system are analyzed within the framework of the coupled channels model. We find that inclusion of the inelastic and one-neutron transfer channels in the coupled-channels calculations fails to reproduce the data. We find that possible formation...

  • A FAST RESPONSE AND γ-INSENSITIVE NEUTRON DETECTOR BASED ON PARALLEL-PLATE AVALANCHE COUNTER. Nakhostin, M.; Baba, M.; Itoga, T.; Oishi, T.; Unno, Y.; Kamada, S.; Okuji, T. // Radiation Protection Dosimetry;2008, Vol. 129 Issue 4, p426 

    The article focuses on the performance of parallel-plate avalanche counter (PPAC) in combination with the conventional non-fissile slow neutrons converters. The Monte Carlo simulation was employed to evaluate the key parameters in the detector performance, while an experimental setup was carried...

  • CALCULATIONS OF THE FORMATION CROSS SECTIONS FOR SYNTHESIS OF Z = 114–118 NUCLEI IN 48Ca INDUCED REACTIONS. SIWEK-WILCZYŃSKA, K.; BOROWIEC, A.; WILCZYŃSKI, J. // International Journal of Modern Physics E: Nuclear Physics;Apr2009, Vol. 18 Issue 4, p1079 

    Calculations of the evaporation-residue cross sections for production of super-heavy elements of Z = 114–118 in hot fusion (3n and 4n) reactions induced by 48Ca projectiles on Pu, Am, Cm and Cf targets are presented. Results of calculations are compared with the cross sections measured by...

  • A Monte Carlo study of the effect of coded-aperture material and thickness on neutron imaging. Hayes, S. C.; Gamage, K. A. A. // Radiation Protection Dosimetry;Oct2014, Vol. 161 Issue 1-4, p265 

    In this paper, a coded-aperture design for a scintillator-based neutron imaging system has been simulated using a series of Monte Carlo simulations. Using Monte Carlo simulations, work to optimise a system making use of the EJ-426 neutron scintillator detector has been conducted. This type of...

  • Measurements with the new PHE neutron survey instrument. Eakins, J. S.; Tanner, R. J.; Hager, L. G. // Radiation Protection Dosimetry;Oct2014, Vol. 161 Issue 1-4, p58 

    A novel design of survey instrument has been developed to accurately estimate ambient dose equivalent from neutrons with energies in the range from thermal to 20 MeV. The device features moderating and attenuating layers to ease measurement of fast and intermediate energy neutrons, combined with...

  • BUBBLE-DETECTOR MEASUREMENTS OF NEUTRON RADIATION IN THE INTERNATIONAL SPACE STATION: ISS-34 TO ISS-37. Smith, M. B.; Andrews, H. R.; Ing, H.; Koslowksy, M. R.; Arkhangelsky, V.; Shurshakov, V.; Khulapko, S.; Nikolaev, I.; Lewis, B. J.; Machrafi, R. // Radiation Protection Dosimetry;Feb2016, Vol. 168 Issue 2, p154 

    Bubble detectors have been used to characterise the neutron dose and energy spectrum in several modules of the International Space Station (ISS) as part of an ongoing radiation survey. A series of experiments was performed during the ISS-34, ISS-35, ISS-36 and ISS-37 missions between December...

  • Performance comparison of 2.8 MeV and 241Am-Be neutrons based moisture measurement setups. Abdelmonem, M. S.; Naqvi, A. A.; Al-Ghamdi, Hanan; Al-Misned, Ghada // Journal of Radioanalytical & Nuclear Chemistry;Oct2007, Vol. 274 Issue 1, p1 

    Performance of a 241Am-Be neutron source-based and 2.8 MeV neutrons-based moisture measurement setups have been compared using Monte Carlo simulation. In the setup fast neutrons transmitted through the sample were detected by a fast neutron detector, which was placed behind a massive long double...

  • Higgs production via gluon fusion in kThyphen;factorisation. Hautmann, F.; Jung, H.; Pandis, V. // AIP Conference Proceedings;7/18/2011, Vol. 1350 Issue 1, p263 

    Theoretical studies of Higgs production via gluon fusion are frequently carried out in the limit where the top quark mass is much larger than the Higgs mass, an approximation which reduces the top quark loop to an effective vertex. We present a numerical analysis of the error thus introduced by...

  • Use of Proportional Counters for Yield Measurement in Extremely Short Pulses of Fast Neutrons: Counting Statistics and Absolute Calibration. Tarifeño-Saldivia, A.; Mayer, R. E.; Pavez, C.; Soto, L. // AIP Conference Proceedings;8/4/2010, Vol. 1265 Issue 1, p501 

    A method for absolute calibration of proportional counters for pulsed fast neutrons is presented. The method is based on the use of an isotopic standard source and development of a model for counting detected events from area of a signal compounded by single piled up neutron pulses. Effects of...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics