IPAC2015 - List of Authors (Rakhno, I.L.)

Paper	Title	Page
THPF118	Fermilab Booster Injection Upgrade to 800 MeV for PIP-II	3986
	D.E. Johnson, V.A. Lebedev, I.L. Rakhno Fermilab, Batavia, Illinois, USA
	Fermilab is proposing to build an 800 MeV superconducting linac which will be used to inject H⁻ ions into the existing Booster synchrotron as part of the proposed PIP-II project. The injection energy of the Booster will be raised from the current 400 MeV to 800 MeV. Transverse phase space painting will be required due to the small linac transverse emittance (emit_ring/emit_linac ~ 10) and low average linac current of 2 mA. The painting is also helpful with reduction of beam distributions resulting in a reduction of space charge effects. The injection will require approximately 300 turns corresponding to a ~ 0.5 ms injection time. A factor of seven increase in injected beam power (relative to present operation) requires an injection waste beam absorber. The paper describes the requirements for the injection insert, itsdesign, and plans for transverse painting.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF118
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THPF123	Modeling Proton- and Light Ion-Induced Reactions at Low Energies in the MARS15 Code	4003
	I.L. Rakhno, N.V. Mokhov Fermilab, Batavia, Illinois, USA K. K. Gudima Institute of Applied Physics, Chisinau, Republic of Moldova
	Funding: This work is supported by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy. Correct predictions of secondary particles generated in proton-nucleus interactions below a few tens of MeV is required for radiation studies for front-end of many proton accelerators, energy deposition studies for detectors, radiation damage calculations. Cascade models of various flavors fail to properly describe this energy region. Therefore, we opted to use the existing TENDL library provided in the ENDF/B format in the energy range from 1 to 200 MeV. A much more time-consuming approach utilized in a modified code ALICE was also looked at. For both the options, the energy and angle distributions of all secondary particles are described with the Kalbach-Mann systematics. The following secondaries are taken into account: gammas, nucleons, deuterons, tritons, He-3, He-4 and all generated residual nuclei. Comparisons with experimental data for both the options are presented. The corresponding software is written in C++. Initialization of required evaluated data is performed dynamically whenever the modeling code encounters a nuclide not accounted for yet. It enables us to significantly reduce the amount of requested memory for extended systems with large number of materials.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF123
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THPF124	Energy Deposition and Radiological Studies for the LBNF Hadron Absorber	4007
	I.L. Rakhno, N.V. Mokhov, I.S. Tropin Fermilab, Batavia, Illinois, USA Y.I. Eidelman Euclid TechLabs, LLC, Solon, Ohio, USA
	Funding: This work is supported by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy. Results of optimization energy deposition and radiological studies performed for the LBNF hadron absorber system are presented. The model of the LBNF complex starting from the beam extraction from the Main Injector and primary beam line through the pion-production target, focusing horns, target chase, decay channel, hadron absorber system with its beam instrumentation and civil infrastructure – all with corresponding radiation shielding – was developed using the ROOT-based geometry option in the MARS15 code. Both normal operation and accidental conditions were studied for the 120-GeV proton beam at 2.4 MW. Various design options were considered, in particular: (i) the absorber mask material and shape; (ii) the beam spoiler material and size; (iii) sculpted core aluminum blocks; (iv) various configurations of the core and its shielding and (v) numerous modifications of the overall system configurations. These helped find the optimal design solution for the absorber lifetime and radiation levels in the service building and environment to be within the design goals with an adequate safety margin.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF124
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THPF125	MARS Tracking Simulations for the Mu2e Slow Extracted Proton Beam	4010
	V.P. Nagaslaev, I.L. Rakhno Fermilab, Batavia, Illinois, USA
	Particle tracking taking into account interactions with fields and materials is necessary for proper evaluation of the resonant extraction losses and geometry optimization for the extraction beam line. This paper describes the tracking simulations for the Mu2e Resonant Extraction and discusses the geometry choices made based on these simulations.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF125
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Paper

Title

Page

Fermilab Booster Injection Upgrade to 800 MeV for PIP-II

3986

D.E. Johnson, V.A. Lebedev, I.L. Rakhno
Fermilab, Batavia, Illinois, USA

Fermilab is proposing to build an 800 MeV superconducting linac which will be used to inject H⁻ ions into the existing Booster synchrotron as part of the proposed PIP-II project. The injection energy of the Booster will be raised from the current 400 MeV to 800 MeV. Transverse phase space painting will be required due to the small linac transverse emittance (emit_ring/emit_linac ~ 10) and low average linac current of 2 mA. The painting is also helpful with reduction of beam distributions resulting in a reduction of space charge effects. The injection will require approximately 300 turns corresponding to a ~ 0.5 ms injection time. A factor of seven increase in injected beam power (relative to present operation) requires an injection waste beam absorber. The paper describes the requirements for the injection insert, itsdesign, and plans for transverse painting.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF118

Export •

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

THPF123

Modeling Proton- and Light Ion-Induced Reactions at Low Energies in the MARS15 Code

4003

I.L. Rakhno, N.V. Mokhov
Fermilab, Batavia, Illinois, USA
K. K. Gudima
Institute of Applied Physics, Chisinau, Republic of Moldova

Funding: This work is supported by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy.
Correct predictions of secondary particles generated in proton-nucleus interactions below a few tens of MeV is required for radiation studies for front-end of many proton accelerators, energy deposition studies for detectors, radiation damage calculations. Cascade models of various flavors fail to properly describe this energy region. Therefore, we opted to use the existing TENDL library provided in the ENDF/B format in the energy range from 1 to 200 MeV. A much more time-consuming approach utilized in a modified code ALICE was also looked at. For both the options, the energy and angle distributions of all secondary particles are described with the Kalbach-Mann systematics. The following secondaries are taken into account: gammas, nucleons, deuterons, tritons, He-3, He-4 and all generated residual nuclei. Comparisons with experimental data for both the options are presented. The corresponding software is written in C++. Initialization of required evaluated data is performed dynamically whenever the modeling code encounters a nuclide not accounted for yet. It enables us to significantly reduce the amount of requested memory for extended systems with large number of materials.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF123

Export •

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

THPF124

Energy Deposition and Radiological Studies for the LBNF Hadron Absorber

4007

I.L. Rakhno, N.V. Mokhov, I.S. Tropin
Fermilab, Batavia, Illinois, USA
Y.I. Eidelman
Euclid TechLabs, LLC, Solon, Ohio, USA

Funding: This work is supported by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy.
Results of optimization energy deposition and radiological studies performed for the LBNF hadron absorber system are presented. The model of the LBNF complex starting from the beam extraction from the Main Injector and primary beam line through the pion-production target, focusing horns, target chase, decay channel, hadron absorber system with its beam instrumentation and civil infrastructure – all with corresponding radiation shielding – was developed using the ROOT-based geometry option in the MARS15 code. Both normal operation and accidental conditions were studied for the 120-GeV proton beam at 2.4 MW. Various design options were considered, in particular: (i) the absorber mask material and shape; (ii) the beam spoiler material and size; (iii) sculpted core aluminum blocks; (iv) various configurations of the core and its shielding and (v) numerous modifications of the overall system configurations. These helped find the optimal design solution for the absorber lifetime and radiation levels in the service building and environment to be within the design goals with an adequate safety margin.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF124

Export •

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

THPF125

MARS Tracking Simulations for the Mu2e Slow Extracted Proton Beam

4010

V.P. Nagaslaev, I.L. Rakhno
Fermilab, Batavia, Illinois, USA

Particle tracking taking into account interactions with fields and materials is necessary for proper evaluation of the resonant extraction losses and geometry optimization for the extraction beam line. This paper describes the tracking simulations for the Mu2e Resonant Extraction and discusses the geometry choices made based on these simulations.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-THPF125

Export •

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