Physics design of a CW high-power proton Linac for accelerator-driven system

Pande, Rajni; Roy, Shweta; Rao, S.V.L.S.; Singh, P.; Kailas, S.

doi:10.1007/s12043-011-0220-2

Cited by 10 publications

(5 citation statements)

References 3 publications

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“…The frontend of the ADS accelerator, 20 MeV Low Energy High Intensity Proton Accelerator (LEHIPA) has been developed at BARC [3]. LEHIPA consists of a 50 keV ECR ion source, a 4 m long, 3 MeV, 352 MHz Radio Frequency Quadrupole (RFQ), followed by a 12 m long, 20 MeV, Drift Tube Linac (DTL) [1][2][3][4][5][6][7][8]. Recently, LEHIPA has been commissioned to the target energy of 20 MeV and peak current of 2 mA [3,6].…”

Section: Introductionmentioning

confidence: 99%

“…As the demand for high-intensity proton accelerators continues to rise due to their diverse applications in fields such as energy production, nuclear waste transmutation, neutrino production, Thorium utilization, and more, numerous initiatives are being taken globally to advance their design and development. In India, at the Bhabha Atomic Research Centre (BARC) a 1 GeV, 10 mA proton accelerator for an Accelerator Driven Subcritical (ADS) system has been proposed [1,2]. The frontend of the ADS accelerator, 20 MeV Low Energy High Intensity Proton Accelerator (LEHIPA) has been developed at BARC [3].…”

Section: Introductionmentioning

confidence: 99%

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Phase space reconstruction technique for beam optimization in the Low Energy High Intensity Proton Accelerator (LEHIPA)

Priyadarshini,

Mathew,

Mathad

et al. 2024

Phys. Scr.

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The Low Energy High Intensity Proton Accelerator (LEHIPA) has been commissioned to the design energy of 20 MeV at BARC, India. The low energy beam transport (LEBT) channel of LEHIPA consists of two solenoids and drift spaces for matching the 50 keV proton beam from the ECR ion source (ECR-IS) to the RFQ. The ion beam extracted from the ECR-IS also contains molecular species like H2+ and H3+. Proton fraction in the beam is found to degrade slowly with time due to surface contamination of the plasma chamber and this reduction in proton beam current has implications for longitudinal and transverse beam dynamics. Hence, it becomes important to characterise the beam at different proton fraction levels to understand the end-to-end beam dynamics of LEHIPA. Computed Tomography (CT) technique has been used for the beam phase-space reconstruction in LEHIPA, using a Python program, incorporating the feature of filtering secondary species from the beam profiles measured using slit scanners in the LEBT. Simultaneous Algebraic Reconstruction Technique (SART) is used in the reconstruction since it is identified to be a better technique for a limited number of projections. The reconstruction program is benchmarked with the TraceWin beam dynamics code and implemented on the measured beam profiles to recreate the phase space distribution at the beginning of LEBT. Further, the tomographic reconstruction method is compared with the solenoid scan method and the rms emittance values are found to be in good agreement. The measured tomographic phase space distribution has then been used as TraceWin input for LEHIPA end-end beam dynamics simulations and the LEHIPA beam line parameters are re-optimized for minimum beam emittance growth. This paper presents the simulations of CT technique, benchmarking simulations with TraceWin, phase space reconstruction with measured beam profiles and beam dynamics studies of LEHIPA using the reconstructed beam distributions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phase space reconstruction technique for beam optimization in the Low Energy High Intensity Proton Accelerator (LEHIPA)

Priyadarshini,

Mathew,

Mathad

et al. 2024

Phys. Scr.

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“…For example, it is being studied as a driver for a subcritical nuclear power plant [1][2][3]. It is also proposed as a driver for a spallation neutron source in basic energy science and for high flux neutrino production in a high-energy physics study [4,5].…”

Section: Introductionmentioning

confidence: 99%

Overtaking collision effects in a cw double-pass proton linac

Yue

Qiang

Hwang

2017

Phys. Rev. Accel. Beams

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The recirculating superconducting proton linac has the advantage of reducing the number of cavities in the accelerator and the corresponding construction and operational costs. Beam dynamics simulations were done recently in a double-pass recirculating proton linac using a single proton beam bunch. For continuous wave (cw) operation, the high-energy proton bunch during the second pass through the linac will overtake and collide with the low-energy bunch during the first pass at a number of locations of the linac. These collisions might cause proton bunch emittance growth and beam quality degradation. In this paper, we study the collisional effects due to Coulomb space-charge forces between the high-energy bunch and the low-energy bunch. Our results suggest that these effects on the proton beam quality would be small and might not cause significant emittance growth or beam blowup through the linac. A 10 mA, 500 MeV cw double-pass proton linac is feasible without using extra hardware for phase synchronization.

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“…A number of spallation neutron sources driven by high power proton accelerator were built and are under construction around the world [1][2][3][4][5]. It was also proposed as a driver for nuclear waste transmutation in subcritical nuclear power plant [6][7][8][9], for production of tritium [10], and for high intensity neutrino physics study [11][12][13]. Superconducting cavities were used/proposed in the main section of all of those facilities to accelerate the beam since those cavities can provide high accelerating gradient with little power loss on the wall.…”

Section: Introductionmentioning

confidence: 99%

Wide energy bandwidth superconducting accelerating cavities

Qiang

2015

Nuclear Instruments and Methods in Physics Research Section A:

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a b s t r a c tSuperconducting cavities have been widely used in high intensity proton accelerators. In this paper, we discuss parameters that affect energy bandwidth of the accelerating cavity and propose a new energy averaged transit time factor to help choose transition energy between different sections and cavity geometry parameters in the linac design. These wide energy bandwidth superconducting cavities can potentially be used to accelerate a proton beam multiple times. A time-pass condition is defined to attain fixed RF phases during multiple passes of the beam. Such a superconducting recirculating proton linac could significantly reduce the number of RF cavities in the accelerator and lower construction and operational costs of the facility.

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Physics design of a CW high-power proton Linac for accelerator-driven system

Cited by 10 publications

References 3 publications

Phase space reconstruction technique for beam optimization in the Low Energy High Intensity Proton Accelerator (LEHIPA)

Phase space reconstruction technique for beam optimization in the Low Energy High Intensity Proton Accelerator (LEHIPA)

Overtaking collision effects in a cw double-pass proton linac

Wide energy bandwidth superconducting accelerating cavities

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