Takeshi Kanesue

Bayesian Optimization of The Relativistic Heavy Ion Collider Luminosity via $s^*$ Control

Xiaofeng Gu, Benjamin Coe, G. Robert-Demolaize, Takeshi Kanesue et autres

Maximizing luminosity at the interaction point (IP) requires the collision location $s_{IP}$ to coincide with the longitudinal position of the minimum beta function, $s^$. Accurate optics measurements and control of $s^$ are therefore essential for luminosity optimization. At the Relativistic Heavy Ion …

Performance assessment of PHITS simulations for the inverse-kinematic p( 7 Li,n) 7 Be reaction based on fast-neutron measurements with a diamond detector

Toshiro Sakabe, S. MacLeod, Yume FUJIWARA, M. Horana Gamage et autres

Abstract The inverse-kinematics p( 7 Li,n) 7 Be reaction produces forward-focused neutron emission, offering enhanced usable flux and reduced shielding requirements. Reliable simulation of such neutron fields is essential for the development of compact accelerator-based neutron sources. In this study, a PHITS-based …

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Design and fabrication of a four-rod radio frequency quadrupole with a variable aperture

Shota Ikeda, Shunsuke Ikeda, Takeshi Kanesue, Toshiro Sakabe et autres

Radiofrequency quadrupole (RFQ) linear accelerators with variable aperture cell parameters offer an effective means of accelerating high-intensity ion beams exceeding 100 mA and have been implemented in various RFQ designs. However, in a four-rod RFQ, the use of dielectric perturbation methods to …

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Experimental Validation of PHITS-Predicted Neutron Moderation and Transport Driven by 1H(7Li,n)7Be Inverse-Kinematics Reaction

Toshiro Sakabe, M. Horana Gamage, Yume FUJIWARA, Shunsuke Ikeda et autres

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Simulation study of high-current 7Li3+ beam acceleration with laser ion source and RFQ linac using direct plasma injection

Shunsuke Ikeda, Antonino Cannavò, Giovanni Ceccio, Kazumasa Takahashi et autres

Accelerator-based neutron sources (ABNS) utilizing the 7 Li(p,n) 7 Be reaction in inverse kinematics offer strong forward-directed neutron emission, making them attractive for compact and clean neutron source with low background neutrons and unwanted radiation. However, practical use of such systems requires …

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Prediction of neutron production and energy spectrum by the inverse kinematic reaction between an incident 7Li3+ beam and a proton target in PHITS

Toshiro Sakabe, Antonino Cannavò, Shunsuke Ikeda, Takeshi Kanesue et autres

A neutron source using the inverse kinematic reaction between lithium and proton, p( 7 Li, n) 7 Be, achieves forward-directed neutrons, potentially enhancing neutron yield in the forward direction. Despite the advantage, no evaluated-cross-section data for this reaction can be used in …

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Study of directional pulsed neutron flux generation for BNCT using a high-intensity lithium beam

Masahiro Okamura, Antonino Cannavò, Shunsuke Ikeda, Takeshi Kanesue et autres

This paper introduces a novel neutron production system for Boron Neutron Capture Therapy (BNCT) that employs a lithium beam in inverse kinematics to generate forward-directed neutrons through the 7 Li (p,n) 7 Be reaction. The system utilizes a thin polypropylene target and …

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Multilayer film coating for laser ion source target for increase of low charge state production

Giovanni Ceccio, Shunsuke Ikeda, Takeshi Kanesue, Antonino Cannavò et autres

Abstract The use of Laser Ion Source for accelerator facilities has the advantage to tune the characteristic of the produced beams by changing the laser parameters using the same primary target. The advantageous and innovative opportunity to manipulate the characteristic of charge …

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Polarized ion sources at BNL

D. Raparia, Grigor Atoian, Edward N Beebe, Shunsuke Ikeda et autres

The Optically Pumped Polarized Ion Source (OPPIS) is providing polarized H- to the injector chain of the Relativistic Heavy Ion collider (RHIC), since 2000. The OPPIS had several upgrades. The latest up-grade, completed in 2022, included several improvements. Shorter low-energy beam transport …

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Study on ion current density of different species in laser produced plasma in a solenoid magnet

Takeshi Kanesue, Shunsuke Ikeda, Masahiro Okamura, A. Cannavo et autres

Abstract A solenoid magnetic field along the expanding laser-produced plasma is an essential technique of the laser ion source. The solenoid field can increase ion beam current at beam extraction point by a factor of 2 to over 100 by confining moving …

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Progress of the laser ion source upgrade (LION2) for RHIC and NSRL program at Brookhaven National Laboratory

Takeshi Kanesue, E. Beebe, Benjamin J. Coe, Shunsuke Ikeda et autres

Abstract At Brookhaven National Laboratory (BNL), the LION2 ion source is being constructed to replace an existing laser ion ablation ion source (LIS) at the EBIS facility, which provides heavy ion beams of multiple ion species for the operation of NASA Space …

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EBIS Beam Intensity Online Optimization with GPTune and Offline Analysis with XGBoost

Xiaofeng Gu, Nuclear Physics (NP) USDOE Office of Science (SC), Takeshi Kanesue, Masahiro Okamura et autres

This report was prepared

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