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Title: Fast slit-beam extraction and chopping for neutron generator

Abstract

High-intensity fast white neutron pulses are needed for pulsed fast neutron transmission spectroscopy (PFNTS). A compact tritium-tritium fusion reaction neutron generator with an integrated ion beam chopping system has been designed, simulated, and tested for PFNTS. The design consists of a toroidal plasma chamber with 20 extraction slits, concentric cylindrical electrodes, chopper plates, and a central titanium-coated beam target. The total ion beam current is 1 A. The beam chopping is done at 30 keV energy with a parallel-plate deflector integrated with an Einzel lens. Beam pulses with 5 ns width can be achieved with a 15 ns rise/fall time {+-}1500 V sweep on the chopper plates. The neutrons are produced at 120 keV energy. A three-dimensional simulation code based on Vlasov iteration was developed for simulating the ion optics of this system. The results with this code were found to be consistent with other simulation codes. So far we have measured 50 ns ion beam pulses from the system.

Authors:
; ; ; ; ; ; ;  [1];  [2]
  1. Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
20779086
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 77; Journal Issue: 3; Conference: 11. international conference on ion sources, Caen (France), 12-16 Sep 2005; Other Information: DOI: 10.1063/1.2163271; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM EXTRACTION; COMPUTERIZED SIMULATION; CYLINDRICAL CONFIGURATION; DESIGN; FAST NEUTRONS; ION BEAMS; KEV RANGE; NEUTRON BEAMS; NEUTRON DETECTION; NEUTRON GENERATORS; NEUTRON SPECTROSCOPY; PLATES; PULSES; THREE-DIMENSIONAL CALCULATIONS; TITANIUM; TRITIUM

Citation Formats

Kalvas, T., Hahto, S.K., Gicquel, F., King, M., Vainionpaeae, J.H., Reijonen, J., Leung, K.N., Miller, T.G., and Tensor Technology Inc., 254 Brentwood Lane, Madison, Alabama 35758. Fast slit-beam extraction and chopping for neutron generator. United States: N. p., 2006. Web. doi:10.1063/1.2163271.
Kalvas, T., Hahto, S.K., Gicquel, F., King, M., Vainionpaeae, J.H., Reijonen, J., Leung, K.N., Miller, T.G., & Tensor Technology Inc., 254 Brentwood Lane, Madison, Alabama 35758. Fast slit-beam extraction and chopping for neutron generator. United States. doi:10.1063/1.2163271.
Kalvas, T., Hahto, S.K., Gicquel, F., King, M., Vainionpaeae, J.H., Reijonen, J., Leung, K.N., Miller, T.G., and Tensor Technology Inc., 254 Brentwood Lane, Madison, Alabama 35758. Wed . "Fast slit-beam extraction and chopping for neutron generator". United States. doi:10.1063/1.2163271.
@article{osti_20779086,
title = {Fast slit-beam extraction and chopping for neutron generator},
author = {Kalvas, T. and Hahto, S.K. and Gicquel, F. and King, M. and Vainionpaeae, J.H. and Reijonen, J. and Leung, K.N. and Miller, T.G. and Tensor Technology Inc., 254 Brentwood Lane, Madison, Alabama 35758},
abstractNote = {High-intensity fast white neutron pulses are needed for pulsed fast neutron transmission spectroscopy (PFNTS). A compact tritium-tritium fusion reaction neutron generator with an integrated ion beam chopping system has been designed, simulated, and tested for PFNTS. The design consists of a toroidal plasma chamber with 20 extraction slits, concentric cylindrical electrodes, chopper plates, and a central titanium-coated beam target. The total ion beam current is 1 A. The beam chopping is done at 30 keV energy with a parallel-plate deflector integrated with an Einzel lens. Beam pulses with 5 ns width can be achieved with a 15 ns rise/fall time {+-}1500 V sweep on the chopper plates. The neutrons are produced at 120 keV energy. A three-dimensional simulation code based on Vlasov iteration was developed for simulating the ion optics of this system. The results with this code were found to be consistent with other simulation codes. So far we have measured 50 ns ion beam pulses from the system.},
doi = {10.1063/1.2163271},
journal = {Review of Scientific Instruments},
number = 3,
volume = 77,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}