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Title: Microwave Ion Source and Beam Injection for an Accelerator-drivenNeutron Source

Abstract

An over-dense microwave driven ion source capable ofproducing deuterium (or hydrogen) beams at 100-200 mA/cm2 and with atomicfraction>90 percent was designed and tested with an electrostaticlow energy beam transport section (LEBT). This ion source wasincorporatedinto the design of an Accelerator Driven Neutron Source(ADNS). The other key components in the ADNS include a 6 MeV RFQaccelerator, a beam bending and scanning system, and a deuterium gastarget. In this design a 40 mA D+ beam is produced from a 6 mm diameteraperture using a 60 kV extraction voltage. The LEBT section consists of 5electrodes arranged to form 2 Einzel lenses that focus the beam into theRFQ entrance. To create the ECR condition, 2 induction coils are used tocreate ~; 875 Gauss on axis inside the source chamber. To prevent HVbreakdown in the LEBT a magnetic field clamp is necessary to minimize thefield in this region. Matching of the microwave power from the waveguideto the plasma is done by an autotuner. We observed significantimprovement of the beam quality after installing a boron nitride linerinside the ion source. The measured emittance data are compared withPBGUNS simulations.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE
OSTI Identifier:
926595
Report Number(s):
LBNL-62514
R&D Project: Z2IS29; BnR: 600301010
DOE Contract Number:
DE-AC02-05CH11231
Resource Type:
Conference
Resource Relation:
Conference: 22nd Partical Accelerator Conference 2007.PAC'07, Albuquerque, NM, June 25th - 29th, 2007
Country of Publication:
United States
Language:
English
Subject:
70; Ion source neutral beam injection neutron generator Low energybeam transport beam diagnostic

Citation Formats

Vainionpaa, J.H., Gough, R., Hoff, M., Kwan, J.W., Ludewigt,B.A., Regis, M.J., Wallig, J.G., and Wells, R. Microwave Ion Source and Beam Injection for an Accelerator-drivenNeutron Source. United States: N. p., 2007. Web.
Vainionpaa, J.H., Gough, R., Hoff, M., Kwan, J.W., Ludewigt,B.A., Regis, M.J., Wallig, J.G., & Wells, R. Microwave Ion Source and Beam Injection for an Accelerator-drivenNeutron Source. United States.
Vainionpaa, J.H., Gough, R., Hoff, M., Kwan, J.W., Ludewigt,B.A., Regis, M.J., Wallig, J.G., and Wells, R. Thu . "Microwave Ion Source and Beam Injection for an Accelerator-drivenNeutron Source". United States. doi:. https://www.osti.gov/servlets/purl/926595.
@article{osti_926595,
title = {Microwave Ion Source and Beam Injection for an Accelerator-drivenNeutron Source},
author = {Vainionpaa, J.H. and Gough, R. and Hoff, M. and Kwan, J.W. and Ludewigt,B.A. and Regis, M.J. and Wallig, J.G. and Wells, R.},
abstractNote = {An over-dense microwave driven ion source capable ofproducing deuterium (or hydrogen) beams at 100-200 mA/cm2 and with atomicfraction>90 percent was designed and tested with an electrostaticlow energy beam transport section (LEBT). This ion source wasincorporatedinto the design of an Accelerator Driven Neutron Source(ADNS). The other key components in the ADNS include a 6 MeV RFQaccelerator, a beam bending and scanning system, and a deuterium gastarget. In this design a 40 mA D+ beam is produced from a 6 mm diameteraperture using a 60 kV extraction voltage. The LEBT section consists of 5electrodes arranged to form 2 Einzel lenses that focus the beam into theRFQ entrance. To create the ECR condition, 2 induction coils are used tocreate ~; 875 Gauss on axis inside the source chamber. To prevent HVbreakdown in the LEBT a magnetic field clamp is necessary to minimize thefield in this region. Matching of the microwave power from the waveguideto the plasma is done by an autotuner. We observed significantimprovement of the beam quality after installing a boron nitride linerinside the ion source. The measured emittance data are compared withPBGUNS simulations.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}

Conference:
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