IPAC2015 - List of Authors (Schneider, P.P.)

Paper	Title	Page
TUXB1	FRANZ and Small-Scale Accelerator-Driven Neutron Sources	1276
	C. Wiesner, S.M. Alzubaidi, M. Droba, M. Heilmann, O. Hinrichs, B. Klump, O. Meusel, D. Noll, O. Payir, H. Podlech, U. Ratzinger, A. Schempp, S. Schmidt, P.P. Schneider, M. Schwarz, W. Schweizer, K. Volk, C. Wagner IAP, Frankfurt am Main, Germany R. Reifarth IKF, Frankfurt-am-Main, Germany
	This paper gives an overview of the opportunities and challenges of high-intensity, low-energy light-ion accelerators for neutron production. Applications of this technology range from the study of stellar nucleosynthesis and astrophysical phenomena to medical applications such as Boron neutron capture therapy (BNCT). The paper includes details of the FRANZ facility, under development at Frankfurt University.
	Slides TUXB1 [3.514 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUXB1
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THPF023	Massless Beam Separation System for Intense Ion Beams	3736
	O. Payir, M. Droba, O. Meusel, D. Noll, U. Ratzinger, P.P. Schneider, C. Wiesner IAP, Frankfurt am Main, Germany
	The ExB chopper* in the Low Energy Beam Transport (LEBT) section of the accelerator-driven neutron source FRANZ** will form the required pulses with a repetition rate of 257 kHz out of the primary 120 keV, 50 mA DC proton beam. A following beam separation system will extract the deflected beam out of the beamline and minimize the thermal load by beam losses in the vacuum chamber. To further avoid an uncontrolled production of secondary particles, a novel massless septum system is designed for the beam separation. The septum system consists of a static C-magnet with optimized pole shapes, which will extract the beam with minimal losses, and a magnetic shielding tube, which will shield the transmitted pulsed beam from the fringing field of the dipole. The magnetic field and the beam transport properties of the system were numerically investigated. A main deflection field of about 250 mT was achieved, whereas the fringing field was reduced to below 0.3 mT on the beam axis at 60 mm distance from the dipole. With this settings, the beam was numerically transported through the system with minimal emittance growth. Manufacturing of the septum system has started. * Wiesner, C., et al. "Chopping High-Intensity Ion Beams at FRANZ", WEIOB01, LINAC 2014. ** Meusel, O., et al. "FRANZ–Accelerator Test Bench And Neutron Source", MO3A03, LINAC 2012.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF023
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THPF024	LEBT Dynamics and RFQ Injection	3739
	P.P. Schneider, M. Droba, O. Meusel, H. Niebuhr, D. Noll, O. Payir, H. Podlech, A. Schempp, C. Wiesner IAP, Frankfurt am Main, Germany
	The Low Energy Beam Transport (LEBT) section at the accelerator-driven neutron source FRANZ* consists of four solenoids, two of which match the primary proton beam into the chopper. The remaining two solenoids are intended to prepare the beam for injection into the RFQ. In the first commissioning phase, the LEBT successfully transported a 14 keV He beam at low intensities*. In the current commissioning phase, the beam energy is increased to the RFQ injection energy of 120 keV. In the upcoming step, the intensity will be increased from 2 mA to 50 mA. Beam dynamics calculations include effects of different source emittances, position and angle offsets and the effects of space charge compensation levels. In addition, the behavior of the undesired hydrogen fractions, H²⁺ and H³⁺, and their influence on the performance within the RFQ is simulated. Meusel, O., et al. "FRANZ–Accelerator Test Bench And Neutron Source", MO3A03, LINAC 2012. ** Wiesner, C., et al. "Chopping High-Intensity Ion Beams at FRANZ", WEIOB01, LINAC 2014.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF024
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

FRANZ and Small-Scale Accelerator-Driven Neutron Sources

1276

C. Wiesner, S.M. Alzubaidi, M. Droba, M. Heilmann, O. Hinrichs, B. Klump, O. Meusel, D. Noll, O. Payir, H. Podlech, U. Ratzinger, A. Schempp, S. Schmidt, P.P. Schneider, M. Schwarz, W. Schweizer, K. Volk, C. Wagner
IAP, Frankfurt am Main, Germany
R. Reifarth
IKF, Frankfurt-am-Main, Germany

This paper gives an overview of the opportunities and challenges of high-intensity, low-energy light-ion accelerators for neutron production. Applications of this technology range from the study of stellar nucleosynthesis and astrophysical phenomena to medical applications such as Boron neutron capture therapy (BNCT). The paper includes details of the FRANZ facility, under development at Frankfurt University.

Slides TUXB1 [3.514 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUXB1

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPF023

Massless Beam Separation System for Intense Ion Beams

3736

O. Payir, M. Droba, O. Meusel, D. Noll, U. Ratzinger, P.P. Schneider, C. Wiesner
IAP, Frankfurt am Main, Germany

The ExB chopper* in the Low Energy Beam Transport (LEBT) section of the accelerator-driven neutron source FRANZ** will form the required pulses with a repetition rate of 257 kHz out of the primary 120 keV, 50 mA DC proton beam. A following beam separation system will extract the deflected beam out of the beamline and minimize the thermal load by beam losses in the vacuum chamber. To further avoid an uncontrolled production of secondary particles, a novel massless septum system is designed for the beam separation. The septum system consists of a static C-magnet with optimized pole shapes, which will extract the beam with minimal losses, and a magnetic shielding tube, which will shield the transmitted pulsed beam from the fringing field of the dipole. The magnetic field and the beam transport properties of the system were numerically investigated. A main deflection field of about 250 mT was achieved, whereas the fringing field was reduced to below 0.3 mT on the beam axis at 60 mm distance from the dipole. With this settings, the beam was numerically transported through the system with minimal emittance growth. Manufacturing of the septum system has started.
* Wiesner, C., et al. "Chopping High-Intensity Ion Beams at FRANZ", WEIOB01, LINAC 2014.
** Meusel, O., et al. "FRANZ–Accelerator Test Bench And Neutron Source", MO3A03, LINAC 2012.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF023

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPF024

LEBT Dynamics and RFQ Injection

3739

P.P. Schneider, M. Droba, O. Meusel, H. Niebuhr, D. Noll, O. Payir, H. Podlech, A. Schempp, C. Wiesner
IAP, Frankfurt am Main, Germany

The Low Energy Beam Transport (LEBT) section at the accelerator-driven neutron source FRANZ* consists of four solenoids, two of which match the primary proton beam into the chopper. The remaining two solenoids are intended to prepare the beam for injection into the RFQ. In the first commissioning phase, the LEBT successfully transported a 14 keV He beam at low intensities**. In the current commissioning phase, the beam energy is increased to the RFQ injection energy of 120 keV. In the upcoming step, the intensity will be increased from 2 mA to 50 mA. Beam dynamics calculations include effects of different source emittances, position and angle offsets and the effects of space charge compensation levels. In addition, the behavior of the undesired hydrogen fractions, H²⁺ and H³⁺, and their influence on the performance within the RFQ is simulated.
* Meusel, O., et al. "FRANZ–Accelerator Test Bench And Neutron Source", MO3A03, LINAC 2012.
** Wiesner, C., et al. "Chopping High-Intensity Ion Beams at FRANZ", WEIOB01, LINAC 2014.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF024

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)